Commit Graph

306 Commits

Author SHA1 Message Date
Ben Duncan 828b5df4aa fix: pause a guest on a backend I/O error instead of handing it EIO (#977)
* fix: fail DRAIN when a volume seal failed

shutdownAndUnmount logged the volume unmount error and returned nothing, so
StopAll returned nil and the DRAIN phase ACKed success with vms_stopped set.
The coordinator then advanced to STORAGE and stopped viperblock while the seal
was still in flight, tearing the VBState envelope and leaving the guest unable
to mount its root volume on the next boot. The deploy reported success.

shutdownAndUnmount now returns ErrVolumeSealFailed when the unmount did not
seal; QMP, PID-file, fw_cfg and telemetry cleanup stay best-effort. stopCleanup
and stopOne carry it without aborting the rest of the teardown, since QEMU is
already down by then, and StopAll aggregates the per-VM failures so
handleShutdownDrain ACKs with Error set and never reports vms_stopped.

volumeMounterAdapter.Unmount was the second swallow site: it logged each failed
seal and returned nil unconditionally. It now attempts every volume and returns
the aggregate, which is what the VolumeMounter contract already described.

Terminate still tolerates a failed seal — the volumes are deleted next, so an
unsealed block map loses nothing a caller can ask for.

This does not fix the seal itself. It converts silent data loss into a refused
upgrade that an operator can act on.

* test: add the storagefault e2e suite for backend-outage guest survival

Freezes predastore with SIGSTOP to hold connections open while answering
nothing, which is the fault a timeout-free path cannot distinguish from a
slow peer. On one node that is a total outage; on three it freezes every
node but the guest's own, breaking the RS(2,1) shard floor.

The suite writes and flushes a verifiable region before the fault and
churns a separate unverified region during it, so an interrupted write is
never mistaken for lost data. The root-filesystem load runs from the
user's home rather than /tmp, which is tmpfs on this image and would move
no bytes on the root device.

* test: verify the root device is under write pressure, and size the outage

The previous guard matched /^ *vda / against /proc/diskstats, where the
device name is the third field, and read $7 which is ms_reading rather
than sectors_written. It printed empty and asserted nothing, so a green
run could not distinguish a surviving guest from an idle disk. It now
samples sectors_written twice and fails unless it advances.

The outage is sized from viperblock's absorption rather than guessed:
a workload must fill DefaultMaxPendingBytes before backpressure engages
at all, so a short freeze measures the retry budget rather than the fault.

* test: add nbdkit fault injection to the storage-fault e2e suite

The predastore freeze takes the whole storage cluster away from every
guest on it, which is too broad to run beside anything else. Removing a
single volume's NBD server is the same fault at one-volume scope: one
host, one guest, nothing cluster-wide stopped.

Both signals are here because they sit on opposite sides of the defect.
SIGSTOP holds the socket open and answers nothing, so the guest blocks
and no error reaches ext4. SIGKILL closes it, and QEMU's nbd driver at
the default reconnect-delay of 0 fails requests at once, which under
werror=report aborts the journal.

Signalling is guarded: a pid is matched on comm, our plugin and the
volume argument together, and re-confirmed immediately before the
signal, because these hosts run nbdkit for other volumes and pids are
reused.

* fix: pause a guest on a backend I/O error instead of handing it EIO

Every virtio-blk device was created with werror=report,rerror=report, so a
backend outage was delivered to the guest as EIO. ext4 aborts its journal on
that and remounts read-only, and the write that failed is simply gone. Under
werror=stop QEMU pauses the VM and holds the failed request, so a backend that
comes back resumes the guest with nothing lost.

The boot drive, the cold-boot data volume and the hot-plugged data volume all
move to stop. Alongside it the NBD transport gets reconnect-delay=30, which
pauses requests rather than failing them while a storage process restarts on
the same socket; on the legacy -drive form it has to be file.reconnect-delay,
because the bare name reaches the raw format driver, which has no such option.

The QMP heartbeat now recognises run state io-error and issues cont. After ten
attempts the instance is reported impaired and the cadence drops to one attempt
per ten heartbeats, but it never stops: QEMU holds the request for as long as
the guest exists, so a backend that returns an hour later can still be resumed.

The storagefault suite gains the fault this was written for — kill the volume's
own nbdkit, hold, then put it back on the same socket — and it now verifies a
sha256 region across the outage rather than trusting the guest to be reachable.
Three harness defects went with it: the socket-liveness poll ran unprivileged
against a 0770 directory and could never succeed, the relaunched socket was
left 0755 where QEMU needs group write, and the two variants shared one guest
so a fault in the first was diagnosed in the second.

* test: cover the io-error resume policy

* test: stop two parallel tests racing on the terminate backoff variable

* fix: report a guest paused on a backend I/O error as impaired

A guest held by werror=stop kept reporting ok on both status checks. QMP stays
responsive while the guest is paused -- cont is being sent and answered -- so
the QMP failure gate that DescribeInstanceStatus keys on never trips, and the
one state a customer most needs to see looked healthy.

Instance status now reports impaired/failed while the resume budget is
non-zero, timestamped from IOErrorSince so impairedSince is when the guest
paused rather than when it was escalated. System status reports impaired too:
a backend I/O error is an infrastructure fault, not a guest one, and that
distinction is what the two checks exist to draw. The counter is cleared by
the first poll that sees the guest running, so both clear on recovery.

* test: reap the relaunched nbdkit when the fault test ends

relaunchNbdkit detaches the server with setsid so it outlives the SSH session
that started it, and viperblockd never learned it exists. Nothing reaped it, so
every run left an nbdkit holding a socket and a cache for a volume that was
later detached or deleted -- four were found running on dev-prod against two
detached and two deleted volumes.

The PID is resolved from the socket path rather than the volume id, so a
legitimate viperblockd server for the same volume is never the one killed.

* test: prove the backend is serving before a fault is called cleared

Thawing the process a fault stopped is not the same as restoring the service.
The outage test treated SIGCONT as the end of the fault and went straight to
judging the guest, so it passed while the cluster it ran on stayed unable to
serve a single object for the next 35 minutes, and the next test would have
inherited that.

thawPredastore now puts and gets an object through every gate, with a budget,
and fails the test if the backend does not come back.

* fix: do not hand back a mount entry whose export is gone

A volume whose unmount failed kept its entry in MountedVolumes while its nbdkit
was gone. Every later ebs.mount then matched that entry and returned its socket
path, so vmMgr waited for a socket nothing would ever create and the instance
could not be started again — on dev-prod a guest stopped against a frozen
backend was left permanently stopped, four start attempts failing identically
on a socket the node had already removed.

Drop the entry when there is positive evidence the export is dead: the socket
is absent, or the recorded pid is not running. Neither can be true of a live
export, so the double-writer hazard the guard exists to prevent is unaffected.

Also make the durability test's pattern helpers report failures. The read dd sat
in a pipeline, so its exit status was discarded and the harness hashed nothing
and returned the empty-string sha256 as a checksum.

* test: report the guest console when a restart never answers SSH

A restart that reaches running but never comes back is indistinguishable from
a dead root filesystem without the serial console, and the log is gone once
the fixture terminates the instance.

* fix: converge guest port datapaths concurrently, not one deadline after another

Each guest port that misses its SB binding burns the full convergence deadline,
and applyEIPs spent them in series. Three ports belonging to long-stopped
instances therefore held a newly launched guest's EIP dark for the sum of them
before its own probe started.

AddEIP stays serial since it mutates NB. Only the waits fan out, bounded, and
sb-cluster-state-reset is now serialised with a minimum interval so concurrent
probes cannot each fire a cluster-wide resync.

* fix: refuse a stale cross-node start after the owning node is gone

The volume lease already refused a cross-node mount, but it is a liveness
claim: 45s TTL, renewed every 15s. A node that dies holding un-uploaded
writes stops renewing, and 45 seconds later nothing refuses a start elsewhere
that loads a stale backend checkpoint.

A failed seal now writes a durable marker naming the node holding the only
current copy, cleared on a seal that reaches the backend and on delete. The
lease covers a live holder, the marker a dead one.

The refusal also reaches the caller instead of being flattened to
ServerInternal, which told an operator to retry something that cannot succeed
while the holder is down.

* fix: keep the daemon's message when a start is refused

Rebuilding the error from the code alone rendered the generic ErrorLookup
text, so a refusal naming the node holding the volume reached the caller as
boilerplate about attaching volumes.

* fix(ec2): terminate detaches every DeleteOnTermination=false volume

TerminateStoppedInstance skipped the detach for a non-Boot DoT=false volume
on the assumption that Stop's Unmount had already cleared its attachment.
Unmount only clears it when the seal succeeded, so a volume whose seal failed
stayed in-use pointing at an instance that terminate then deleted, leaving it
unreachable with no owner to release it.

The running-instance path already detaches every DoT=false volume; the stopped
path now matches it, and tolerates an already-gone volume the same way.

DeleteVolume also keeps its provider error on the way out. The terminate reaper
retries the delete every two minutes and logged a bare ServerInternal, which
made a blob node being down indistinguishable from a transient fault.

* fix(ec2): DetachVolume --force releases a volume whose instance is gone

The ordinary detach routes to ec2.cmd.{instanceID} for the guest unplug, so a
volume left attached by a part-way teardown could never be detached: the
instance no longer runs anywhere and nothing answers. That also made it
undeletable, since DeleteVolume refuses an attached volume.

ForceDetachVolume already existed for this deadlock but was reachable only from
account teardown. Force now falls back to it when the instance has no responder,
which is the one case where clearing the attachment cannot strand a live guest.

* fix(viperblock): unsealed writes steer placement instead of pinning a volume

The dirty marker refused any mount from a node other than the one holding
unsealed writes. Instance start already forwards to the node that last ran the
instance and falls back after a 30s window, so that refusal turned a working
fallback into a volume that could run nowhere once its owner was gone. It
traded a rare data-loss risk for a permanent availability failure.

The marker is now a record and a warning, not a gate. A takeover logs the
previous holder and why it could not seal, then adopts the marker so the old
node is no longer treated as the better source. Live exclusion is unchanged and
still enforced by the lease.

It is also written on open rather than on seal failure. A node killed mid-write
never reaches its seal, so the old trigger left no trace in exactly the case the
marker exists to describe.

Adds 'spx admin volumes unsealed' to see which volumes would cost something if
started elsewhere.

* fix(viperblock): fence a volume whose lease moved instead of logging it

The lease was checked once, at mount, and never again. A node that lost it
kept its export up and kept writing into a volume another node owned, so
both copies advanced and the backend settled it by arrival order.

Losing a renewal now decides: another holder means tear the export down,
no holder means the entry merely aged out, so reclaim it and leave the
guest running. Fencing never seals — this node's copy is the stale one —
and leaves the dirty marker for the winner to take over.

This is not an epoch fence. It narrows the window from the 45s TTL to one
renewal interval at no write-path cost; the backend still cannot refuse a
stale writer.

* fix(network): advertise EIPs so a recycled address is reachable

The gateway switch port only asked ovn-northd to publish the router's NAT
addresses in centralised and routed modes, so on a distributed cluster nothing
ever announced an elastic IP. OVN still answers ARP for it, which is why a
first-time allocation works and hid this — but no gratuitous ARP is sent when
the address moves to a new ENI, so every host on the segment keeps resolving it
to the previous holder's MAC until its cache ages out. Reusing an address from
the pool then lands on a dead MAC and the instance is unreachable from outside.

Distributed mode needs the option as much as the others: northd scopes each
entry with is_chassis_resident(<vif port>), so the announcement leaves from the
chassis running the instance rather than the gateway, which is what distributed
NAT wants.

Converge on the already-attached path too. AttachIGW returns early once the
gateway port exists and nothing else rewrites it, so without that an existing
VPC would stay silent for its whole life.

Confirmed on dev-prod: setting the option moved three EIPs from unadvertised to
carrying their correct external_mac, each scoped to its own ENI's port.

* fix(viperblock): make the volume fence and its dirty marker ownership-safe

Four corrections to the lease-loss fence, all found in review.

Drop the reacquire path. Losing a lease and finding no successor was treated as
a lapsed entry worth reclaiming, but leases.acquire returns the cached entry —
already flagged lost, with a dead renewal goroutine — so the "reclaimed" lease
renewed nothing and the node went on writing a volume it could not prove it
owned. The two errors are not symmetric: a false fence costs one guest a
restart, a false reclaim leaves two nodes writing one volume. Fence in both
cases, and report which happened through the outcome attribute.

Surrender a lease this node cannot confirm. Renewal only noticed a loss when
the server rejected an update, so a node partitioned from NATS kept its export
up while the TTL expired and another node took the volume. Track the last
confirmed renewal and give the volume up once that ages past the point where
the server may admit another owner. Bound the renewal call too, so a hung
JetStream request cannot hold the goroutine past that point.

Do not act on a kill that did not take. Both the fence and ebs.unmount removed
the mount entry, released the lease and announced the result before knowing
nbdkit had exited — the fence then reported a writer stopped that was still
running, and the unmount sealed into a directory a live process was writing.
Wait for the exit, and on failure leave the volume mounted and say so. An
already-exited process now counts as success, which is what the caller asked.

Give the dirty marker a generation. It recorded an owner and nothing to order
two nodes' claims, so a node returning after a takeover could clear or overwrite
the winner's marker and point placement back at the stale copy. Stamp the lease
generation, refuse a write from an older one, and only clear a marker this node
still owns. A marker that cannot be written now fails the open rather than
leaving writes nothing records.

* test(viperblock): cover the stall surrender and the unmount kill guard

The two ownership cases the fence work left untested.

A holder partitioned from NATS while the winner keeps it never gets an update
rejected, so revision checking cannot see it — it has to give the volume up on
its own clock. Pins that validity sits below the server TTL with room for a
check in between, that a lapsed holder reports the loss as a stall rather than
as a takeover, and that releasing a surrendered lease leaves the entry for
whoever holds it now.

The unmount side of the kill guard: sealing under a live nbdkit writes a state
torn between two writers, so a kill that did not take has to fail the unmount
and leave the entry mounted for a retry.

* fix(e2e): keep the guest private key for as long as the key pair

EnsureKeyPair computed the PEM path from the caller's directory but wrote
the file inside the ensureOnce closure, which runs only on the first call.
Callers passed a per-test artifact dir, and ArtifactDir removes that dir
when the test passes — so the first test's success deleted the only copy
of the private key while the key pair stayed registered, and every later
call returned a path nothing had ever been written to.

Guests after the first were then launched against a public key whose
private half no longer existed, so the harness could never authenticate
and gave up after the full five-minute budget. The guests were healthy
and reachable on tcp/22 throughout, which is why this read as a storage
or network fault for so long.

The directory parameter was the defect, so it is gone: the PEM now lives
in a directory the fixture owns and removes with the key pair, and no
caller can supply one that is shorter-lived.

Also reorder the killed-nbdkit teardown. The reaper registered its own
cleanup after the detach registered one, so LIFO killed the block server
before the platform detached the disk and DetachVolume then failed with
"Node ... is in use". The detach cleanup now reaps once it is done.

* fix: stop leaking an nbdkit export when recovery cannot adopt it

Restart recovery adopts a guest's boot volume, then routinely fails the
-efi volume with "claim lease: context deadline exceeded" -- JetStream is
still catching up at daemon start and the KV claim runs on the client's
5s default. Recovery gave up on the first error and never retried, so the
export stayed live with no registry entry. At terminate the unmount found
nothing to seal, returned NotFound and killed nothing, and the process
outlived its guest holding the volume and socket open. EFI is always the
second volume adopted, which is why it was always the one that leaked.

Two changes, because either alone leaves a hole:

- rebuildMountedVolume retries the build (4 attempts, 3s apart) so a
  JetStream that is merely slow no longer orphans an export for the life
  of the process.
- unmountVolume reaps a corroborated export for the volume it was asked
  to unmount when the registry has no entry for it, so an export orphaned
  by any means is still cleaned up. The reap goes through
  reapOrphanedNbdkit, which declines anything a live process references:
  at unmount the guest's blockdev may not be torn down yet, and killing
  the server underneath it strands QEMU.

* test: hold the backend-serving probe and assert predastore readiness

The backend-outage test declared the backend restored on one successful
round trip through each gate. A gate can answer the request that arrives
just after a thaw and then lose its blob peers under the load that
follows, which is a backend that never recovered reported as one that did
-- and that is what happened: the probe reported all three gates serving
minutes before the guest was still taking BLOCK_IO_ERROR on every resume.

The round trip has to hold across three rounds now, and the count restarts
rather than decays when one fails, so a gate that serves and then stops is
the failure the hold is looking for rather than noise it averages out.

It also checks /readyz on each host and reports any failed check by name.
The round trip only proves this workstation can write through a gate; it
says nothing about which blob peers that gate can reach, and a gate one
node short of the write floor serves a small object and fails a guest. A
host that serves no admin listener is logged and skipped, since the port
is optional configuration.

* fix: scope predastore's admin port to the cluster plane in the host policy

predastore's admin listener binds the host's cluster bind_addr and serves
/healthz and /readyz unauthenticated. Readiness now names which blob peers
a gate cannot reach, which is exactly the kind of topology detail 4432 is
peer-scoped for, so 8660 joins it in the peer-scoped rule rather than the
public one.

* fix: keep resuming a paused guest at heartbeat rate after a long outage

Past ten attempts the cont dropped to one per ten heartbeats, so a guest
whose backend had come back could sit paused for another five minutes
before anything retried it. Measured on dev-prod: the backend was proved
serving through all three gates while the guest was still waiting on
attempt 60, five minutes after attempt 50.

The slowdown was there to avoid paying a failed I/O every thirty seconds
on a backend still down. That is nearly free, and five minutes of downtime
after recovery is not, so only the log line is throttled now.

* test: fail the run when a key pair name resolves to more than one pair

A create that lands twice leaves two key pairs with one name and different
material. RunInstances resolves the name to one of them while the harness
holds the private key of the other, and the only symptom is every guest in
the run refusing the key at the SSH gate — five minutes of waiting per
guest, four guests, and nothing anywhere naming the cause. Observed on
dev-prod: two pairs created a millisecond apart, both named
e2e-key-30de10ba.

One DescribeKeyPairs after the create says so outright instead.

* test: tolerate an already-released volume in the detach teardown

Teardown runs DetachVolumeWait after a terminate that releases the volume
itself, so the detach can arrive at a volume already on its way to
available. That is the outcome it wanted, and treating the IncorrectState
refusal as fatal failed a backend-outage run whose assertions had all
passed — the guest came back, every acknowledged write verified, and the
test still went red on the way out.

VolumeInUse is still fatal: that one means the volume is attached
somewhere it should not be.

* test: carry the merged suites onto the reworked key-pair and account-scoped seams

The diskperf suite arrived on dev calling EnsureKeyPair with the artifact dir
this branch removed, and DeleteVolume's metadata lookup is account-scoped now,
so the provider-failure test has to seed and delete under the same account.

* refactor: make the fence outcome a type in one const block

Four separate exported string constants with a paragraph of comment each,
passed to RecordVolumeFence as a bare string. Group them, give them a
FenceOutcome type, and take that type at both call sites so an arbitrary
value can no longer reach the metric attribute.

* refactor: move viperblockd's wire contract into a leaf vbwire package

The daemon imported viperblockd for exactly two symbols -- the fenced
volume subject and its event -- which put the storage service back on the
daemon's dependency graph to name something it only listens for.

vbwire holds the contract instead: the subject and event, the dirty
bucket name and record shape, and the read-only listing an operator tool
needs. It imports nothing from spinifex, so both the daemon and the admin
CLI drop their edge to viperblockd entirely. cmd/service.go keeps its
one, which is genuine: it constructs the service.

* docs: drop a specific host name from the start-refusal comment

Named a real dev-prod host in a comment and in test fixtures. Say what
the name is instead.

* ci: give storagefault a dedicated nightly cell

The suite is eligible for both topologies and runs on the PR gate, but no
nightly cell ran it: the permutation cells run a deliberately narrow
subset and none of the dedicated suite cells named it.

Cell 29, single-node, following eks/ecs/rds. It cannot join a permutation
cell -- it SIGSTOPs a cluster-wide service, so every suite sharing that
environment would report the outage as its own failure.

* ci: run storagefault nightly on three nodes, not one

The previous commit put its dedicated cell on a single-node runner. That was
the wrong topology and the wrong justification: single-node is RS(1,0), where
the shard floor cannot be broken and a cross-node takeover after a failed seal
does not exist, so the two assertions worth having a dedicated cell for were
the two it could not make. Cell 29 is now real-multi on ci-multi.

It also corrects the claim that the PR gate already covers the multi-node case.
The suite is eligible for both topologies, but e2e.yml's default suite list
never names it, so it has never run there. A full pass is ~63 minutes on
dev-prod bare metal, almost all of it deliberate waiting -- one test holds
predastore SIGSTOPped for seven minutes -- which is too long to add to a gate
that currently finishes well inside its budget. Nightly is where it belongs.

Consequences: a per-cell timeout_minutes, defaulting to the previous 50, since
90 minutes of suite cannot run in a 50-minute job; the permutation steps gated
on matrix.suite == '' so the dedicated cells do not also run them; and a Run
Multi Suite E2E step that builds NODES_CSV from the tofu inventory and asserts
the suite against E2E_SUITES_MULTI before running it.

* fix: stop a startup KV race leaving vpcd serving keyless guests

vpcd opens five KV buckets while NATS is still coming up, each attempt
carrying a ~5s JetStream API deadline, and applied three different policies to
the same failure: spinifex-vpc-enis was fatal, while instance-state,
security-groups, subnets and vpcs each degraded silently for the lifetime of
the process. A five-second blip during a cold start therefore decided how a
node served metadata until someone restarted it.

On dev-prod all three nodes hit this after a deploy. Two were saved by
accident: their ENI bucket also timed out, so they exited 1 and systemd
restarted them cleanly. The third's ENI bucket opened in time, so it never
crashed and ran for hours with no instance record loader. With the local state
file unreadable as well, every instance-backed IMDS leaf 404'd, cloud-init's
crawl died on ami-id and fell back to DataSourceNone, and every guest launched
on that node booted with no authorized_keys.

kvstore.OpenWithRetry retries for a bounded window before any policy applies,
logs the cause per attempt and the wait on a late success, wraps the last error
with the bucket name, and returns at once on a cancelled context. All five
opens use it. Failing to open the instance record space is now fatal, matching
the ENI bucket: the dependency whose loss stops guests logging in should not be
treated more leniently than the one whose loss stops ENI resolution.

Also fixes the reason the fallback was load bearing at all. The local state
file was written 0600 and vpcd reads it as a different user in the shared
spinifex group, so the local-first path had never once worked and its
mtime+size cache had never fired. It is 0640 now, set with an explicit Chmod so
an inherited umask cannot undo it.

Closes mulga-gtpzz, mulga-dhqxr. Still open: mulga-mm2oc, IMDS serving an
unresolvable instance as "no key pair" with nothing logged.

* fix: scope the ime-* firewall accept to IMDS and VPC DNS only

The per-tap OVS demux delivers any guest packet addressed to
169.254.169.254 or .253 onto an ime-* host port regardless of L4 port,
and iifname "ime-*" accept then admitted all of it. Every wildcard-bound
host service — sshd, the AWS gateway, northstar, the console — answered
guest packets on those addresses; only asymmetric reply routing kept the
handshake from completing, and a guest could still drive northstar to
recurse unthrottled. Scope the accept to IMDS (.254:80) and VPC DNS
(.253:53), letting everything else fall through to policy drop.

* docs: document the instance-to-host plane and how to protect it without the ISO

The metadata/VPC-DNS link-local plane (169.254.169.254/.253) is served by
host services and is invisible to a NIC-level or cloud firewall, since the
traffic is intra-host on the OVS bridge. Explain that the ISO ships the
scoping rule armed, that the binary installer ships the firewall off, and
that a non-ISO install must enable it with setup.sh --firewall=on or
firewall_enabled=true. Include verification from an instance and the host.

* fix: withhold the IMDS meta-data listing when the instance does not resolve

Every omission from the meta-data root is a positive claim about the instance —
public-keys/ absent means "launched without a key pair", and cloud-init believes
it, writes no authorized_keys and boots the guest keyless. So resolving the
instance was best-effort for a listing whose whole meaning depends on it: a
backend error or a miss shortened the listing instead of failing it, and nothing
anywhere recorded that the answer was a guess.

Withhold the listing with a 500 instead. cloud-init retries a 5xx and cannot
retry a 200 that is merely wrong, so this converts a permanent silent failure
into a transient loud one. servePublicKeys already had this policy for the leaf;
the root is what contradicted it.

A profile lookup that fails still serves the listing minus iam/, and now logs.
The key pair is the field a guest cannot recover from losing, while a missing
role surfaces through the credentials leaf, which reports the miss itself.

Also stops the storagefault cross-node test failing on its own access path. It
tolerates the pattern changing across a takeover, but readPattern needs sudo,
and a volume opened from the backend checkpoint may predate cloud-init writing
its sudoers drop-in — indistinguishable from an unreadable device at the dd call
site. It now checks sudo first, and reads cloud-init's recorded datasource to
tell a rolled-back root filesystem from IMDS never having answered, failing
loudly on the latter rather than accepting it as storage loss.

---------

Co-authored-by: brynmailer-mdc <bdm@mulgadc.com>
2026-09-03 19:45:33 -05:00
Julian Sommer 7b4a83ccfe fix: expect InvalidSnapshot.NotFound for cross-account DeleteSnapshot
Snapshot metadata is now keyed by owning account, so a snapshot outside
the caller's prefix is absent rather than forbidden. The e2e assertion
still encoded the pre-partitioning UnauthorizedOperation contract.
2026-09-03 15:51:27 +10:00
Julian Sommer d8d3e2268d feat: partition EBS metadata keys by owning account (#989) 2026-09-03 15:38:23 +10:00
Bryn Mailer 18aa67b0e9 feat: add the e2e guest disk-performance gate (#964)
* feat: add the e2e guest disk-performance gate

Nothing measured guest disk performance in CI, which is why a quadratic
index scan shipped in viperblock 35dd9f2 and survived three subsequent
fixes to adjacent code. It is also why the two availability clauses at
the end of the ebs-performance plan's Stage 0 have never been evaluated:
a sustained random-write workload took the guest, and then the host,
down, and nothing since has demonstrated that it no longer does.

tests/e2e/diskperf/ launches an instance, attaches a dedicated blank
volume per repetition, and drives a pinned fio profile over guest SSH.
Two profiles: randwrite-4k at 4 jobs x 4 GiB, the shape the exit
criterion names, and randrw-70-30-4k, the mixed workload the headline
IOPS came from. The target is a raw device with direct=1 rather than a
file on the boot disk, so guest page cache, filesystem allocation and
journal traffic are out of the path.

Two classes of assertion, kept apart because folding them together lets
a run that left the host unreachable pass on a respectable IOPS figure.
Availability is hard pass/fail and absolute, so it gates from the first
run: the job completes inside its budget, a guest responsiveness probe
answers throughout on a second SSH channel, and the host's own sshd
answers throughout. The guest probe reads the root volume while the
workload runs on a different one, so a pass is evidence of isolation
between volumes rather than of the job merely being slow. The host probe
is a TCP connect plus an SSH banner read, which needs no credential and
still proves the kernel scheduled sshd.

Throughput and latency are banded against a committed baseline: fail
above 25% regression, warn above 10%, per-metric median across
repetitions. baseline.json is committed and embedded, with every figure
zeroed, and a zero reference records and warns rather than failing. Only
the availability class gates until numbers are captured on the bare-metal
cell; a throughput band nobody measured would be a fabricated gate.

A fresh volume per repetition is the reset. Extent count grows
monotonically, so reusing a volume makes the gate order-dependent and
drifts its own numbers upward over time, slowly normalising the
regression it exists to catch. Each job is its own guest invocation and
fio's JSON is fetched by a separate command, so a wedged job loses only
itself and reports as a budget breach rather than a parse failure.

e2e-baremetal.yml gains suites, suite-env and cell inputs so one reusable
workflow serves both the correctness cell and nightly cell 28, which
queues behind cell 20 on the shared concurrency group. Cells 25-27 are
the dedicated eks, ecs and rds cells. The per-suite Go test timeout is
resolved from e2e_suite_timeout in suite-sets.sh, where diskperf declares
its 180-minute budget beside rds's rather than in a second place.

The gate's own arithmetic runs in preflight via test-harness: band edges,
the unmeasured cases, per-stream metric selection, fio JSON parsing, and
the probe accounting including a slow-but-successful answer counting as a
breach. A gate whose comparison logic is untested is the failure mode the
plan is otherwise full of.

The extent-count ceiling named as a fourth availability assertion is not
implemented: it needs viperblock.index.entries from S1.5, which does not
exist.

* feat: let a manual bare-metal run choose its e2e suites

A dispatch run only sees inputs declared under workflow_dispatch, which had
none, so suites and suite-env resolved empty and fell back to the correctness
set. Capturing a diskperf baseline by hand was therefore unreachable without a
workflow_call caller.

* fix: build the bare-metal suites the run step will execute

The build step packs pre-built binaries into the tarball and did not see the
suite selection, so a selected suite was absent from the node unless it
happened to be one of the three the build script hardcoded.

* feat: commit the measured disk-performance baseline

Medians of three repetitions on the bare-metal cell. The throughput and
latency bands now gate instead of warning, so a 2x regression in either
job fails the suite.

randwrite-4k's write tail is two orders above the mixed job's. It is
recorded as measured rather than zeroed: an ungated metric would miss the
regression class the gate exists to catch.
2026-09-03 14:33:21 +10:00
Julian Sommer 677055a478 test: cover the launch-template boot path end to end (#982) 2026-09-02 14:58:13 +10:00
Julian Sommer 4b4542a4c5 test: retry the multinode same-SG cross-host ping and capture OVN state at first failure
The cross-host ICMP probe fired once, with no convergence budget, the moment
sshd first answered on the source guest. The default SG self-ingress rule
matches on the northd-derived $<pg>_ip4 address set, which only reaches the
remote chassis after northd regenerates it from port-group membership and
ovn-controller installs the flows there, so a first-packet burst can be
swallowed by the priority-900 default drop with no log line anywhere.

Give the probe the same 45s/2s budget the single-node suite already uses, and
snapshot NB/SB address sets, port groups, ACLs, port bindings and br-int flows
from every node plus the source guest on the first failed burst rather than at
teardown, so the state is captured while the drop is still observable. Emit
attempt count and convergence time so a pass that needed most of the budget
still surfaces as a propagation delay instead of a silent green.
2026-09-02 11:37:22 +10:00
Julian Sommer 5b09cc9172 test: add a live E2E identity-policy authorization suite (#980) 2026-09-02 11:06:54 +10:00
Julian Sommer a9a457489d fix: re-anchor a caller-supplied policy ARN onto the caller's account
The seven sourcePolicyARN actions resolved to the PolicyArn the caller sent,
so the gate decided against an ARN whose account the caller chose. The scope
now takes the ARN's path and name and rebuilds it on the caller's account, as
sourceOIDCARN beside it already does, and widens to account-wide when the ARN
carries no policy component. Lands with the cross-tenant integration suite that
found it.
2026-09-02 10:18:50 +10:00
Julian Sommer ee258fd248 refactor: back the e2e Eventually helpers with testify
Delegate the hand-rolled deadline loops to require.Eventually and
require.EventuallyWithT instead of open-coding the polling.
2026-09-01 12:02:39 +10:00
Julian Sommer ce9b6e5b41 fix: gate cluster-wide IPsec on every chassis being configured (#953) 2026-08-31 15:31:59 +10:00
Julian Sommer f919a257ef fix: make the SG default-deny ACLs match every ethertype (#947) 2026-08-31 12:15:56 +10:00
Josh Siviour abb817c7d5 feat: add admin Ochre catalog read and drop provider-direct model (#917)
Expose per-model availability and reason on an operator-only ListOchreCatalog
action for the console, keeping the tenant ListFoundationModels omission
intact. Remove the unbuilt provider-direct entry from the v1 catalog.
2026-08-27 21:13:44 +10:00
Julian Sommer fae6b08acc fix: conform DescribeImages BootMode and IAM list required members
DescribeImages projected BootMode through aws.String unconditionally, so an
AMI recording none emitted "", which is outside the model enum. RegisterImage
takes BootMode as an optional input, so this is the normal path for an AMI
registered without one, not stale data. Set the member only when present.

ListAccessKeys and ListGroups built their results from a nil slice when
nothing matched. xmlutil drops a nil slice entirely rather than emitting an
empty element, so the response lost a member the model marks required. Start
both slices empty and non-nil.

Integration conformance drops from 18 violations to 15; the remainder are the
EC2 AccessDenied error-code findings, which are unrelated.
2026-08-27 11:46:39 +10:00
Julian Sommer 2da27c4e2a fix: return InsufficientInstanceCapacity with a 5xx status (#903) 2026-08-27 09:14:30 +10:00
Julian Sommer 3bf0379daa fix: gate sts:AssumeRole on the caller's identity policy (#889) 2026-08-27 09:04:25 +10:00
Julian Sommer 8e01e76dc0 fix: disable embedlit 2026-08-20 10:52:03 +10:00
Julian Sommer c84200e519 feat: probe real qemu state (#839) 2026-08-20 09:46:53 +10:00
Ben Duncan ae2a1830ef Merge remote-tracking branch 'origin/dev' into account-quota 2026-08-20 04:01:14 +10:00
Ben Duncan 4508193180 fix: fail daemon start when a node with public pools cannot build external IPAM 2026-08-20 03:48:45 +10:00
Ben Duncan 0d8425ef51 test: skip the EIP quota leg where a cell does not serve EIPs from every node 2026-08-20 03:31:40 +10:00
Ben Duncan 19ec127e2a test: charge a multi-instance launch for every instance it asks for 2026-08-20 02:43:44 +10:00
Ben Duncan f41f5530a0 test: add an e2e suite proving quotas gate every capped resource 2026-08-20 02:26:27 +10:00
Julian Sommer 894fe84255 test: dump OVN MAC_Binding and route state when natuplink egress fails
The artifact bundle carried the guest console and the spinifex journals but
nothing from OVN, so a phase 6 egress failure could not be attributed to an
unresolved gateway nexthop MAC versus a return-path or upstream problem.

Register an OnFailure at the top of phase 6 that writes
static-mac-binding-list, the SB MAC_Binding table and the VPC router's
lr-route-list into the bundle.
2026-08-19 12:08:38 +10:00
Julian Sommer a8d0ba185e fix: bound the natuplink guest egress loop to the console verdict budget
The guest fail-loop ran 36 iterations at ~28 s each (two 10 s curl timeouts,
a 3 s ping, a 5 s sleep), so NAT-E2E-EGRESS-FAIL first printed at ~16m50s
while the console wait gave up at 8m. The marker was structurally
unreachable and an egress failure reported only a byte count.

Derive the wait budget from the loop instead of hard-coding both ends: 10
iterations at a 30 s per-iteration allowance plus 3m for boot and cloud-init,
keeping the same 8m ceiling. The user-data script is now generated from those
constants and the existing marker consts. Dump the last console read via
OnFailure so a budget overrun also leaves the console in artifacts.
2026-08-19 12:02:31 +10:00
Julian Sommer 17cea6cd4b fix: gate the SG datapath probe on the target's HTTP listener
TestSGPolicyDatapath/AllowedTraffic waited 60s for curl to reach the
target's HTTP server but nothing ever waited for that server to start.
Its cloud-init runs later than the client's sshd, which is what the
preceding stage actually gates on, so the budget was measured from the
wrong baseline and the gap between the two is unbounded on a loaded
node. The failures reported curl exit 7, a refused connection: a
missing SG allow is a drop ACL here, which would time out as exit 28.

The target guest now reports its listener on the serial console, the
only channel back to a guest whose SG has no SSH ingress, and a new
TargetHTTPReady stage waits for that marker before AllowedTraffic runs
at all. AllowedTraffic keeps its 60s budget, which now only has to
cover chassis flow install, and dumps VPC flow diagnostics when it does
fail so a genuine propagation failure is attributable from CI artifacts.
2026-08-19 11:59:02 +10:00
Julian Sommer bdc79108e9 fix: make the DB endpoint the only path to the engine (#830) 2026-08-19 11:04:21 +10:00
Julian Sommer 95911cbfae feat: DescribeDBEngineVersions and DescribeOrderableDBInstanceOptions (#807) 2026-08-17 15:04:12 +10:00
Julian Sommer 20a540cb59 chore: update manifest lint 2026-08-17 11:13:07 +10:00
Julian Sommer eac0f175ba feat: require TLS on RDS connections by default, on both engines (#790) 2026-08-17 09:01:42 +10:00
Ben Duncan 42d87d7a5a feat: EBS export tunables, plus blob-read fault isolation for ebsmetadata (#799)
* feat(ebs): make nbdkit thread count and per-volume read cache configurable

Both numbers that set a volume's export concurrency and memory were
hard-coded: nbdkit ran on its own default of 16 threads per connection
because no -t was ever passed, and the read cache was a 128 MiB literal in
the mount path. Neither could be changed without a recompile, and neither
was visible in the logs or the process argv.

Add default_threads and cache_size_mb to [nodes.<node>.ebs]. Defaults are
unchanged, so a config that does not set them behaves exactly as before.

CacheSizeMB is a pointer so an explicit 0 (cache disabled) stays
distinguishable from an unset key, matching how ViperblockConfig treats its
own toggles. -efi volumes stay uncached regardless.

Validation is a range check only. Both are operator tunables applied per
nbdkit process, and there is one of those per volume, so the host cost is
the value times the volume count -- left for the operator to weigh rather
than second-guessed here.

* feat(security): arm the firewall by install path and sync the clock at firstboot

The host firewall armed itself from a code default, so a curl-to-bash install
onto an existing Debian or Ubuntu machine applied a default-deny INPUT policy
seconds after bootstrap. Anything the operator was already running that is not
on the allow list stopped accepting connections, with nothing logged and no
config key to set beforehand — no template writes firewall_enabled, so every
install fell through to the default.

Arming is now the install path's decision. setup.sh takes --firewall=on|off and
records it in /etc/spinifex/firewall/mode, defaulting on under ISO_BUILD and off
everywhere else: the ISO is an appliance on hardware we define, a package install
is a guest on a machine that was already doing something.

firewall_enabled becomes a three-state *bool so "unset" and "explicitly false"
stay distinguishable. Flipping the default to false instead would have torn down
a working policy on every existing node, because false is an instruction to
disable rather than an absence. Resolution is config, then mode file, then on, so
a node installed before any of this keeps what it has.

The ISO had the opposite problem. setup.sh is the only place that enables
spinifex-firewall.service and it returns before that line under ISO_BUILD, with
no systemd in the chroot to talk to. Nothing else enabled it, so after a reboot
the ruleset — runtime state — was gone, and ReconcileFirewall short-circuited on
an unchanged peer file and never put it back. An ISO node was firewalled until
its first reboot and open permanently after. firstboot now enables the unit, and
the reconcile checks the table is loaded rather than treating an unchanged peer
set as proof the policy is applied.

Two policy changes: 443 is held for the nginx TLS edge so that rollout needs no
per-node firewall change, and the SSH port is read from sshd_config and its
Include drop-ins instead of being hardcoded to 22 — a host on Port 2222 was
allowed exactly one port that was not the one it uses, and ct state established
kept the operator's session alive until they disconnected. 53 stays open on every
node, now with a comment saying so: northstar serves public authoritative DNS.

Clock: firstboot steps and waits for sync before spx admin init mints
credentials, since a certificate issued against a wrong RTC carries a NotBefore
that outlives the correction. Bounded to 60s and non-fatal so an air-gapped
install still completes, and once is enough because rtcsync writes the corrected
time back. A chrony drop-in replaces Debian's makestep 1 3, which stops stepping
after three updates and then slews at roughly 7 seconds a day — a node that
burned those before the network came up never visibly converged.

* fix(security): let a node join a cluster whose firewall is already armed

Expanding a single-node ISO install into a cluster could not succeed. Two
independent blockers, both from the same root: the peer set is derived from
converged cluster state, but the ports needed to reach convergence are gated
on that same set.

The formation port is peer-scoped, and a node dialling in to join is not a
peer yet, so the handshake was dropped rather than refused and the joiner
retried in silence until it timed out. It cannot simply move to the public
rule: outside formation the same port carries the daemon cluster manager,
whose /health and /local/* routes report node topology, service inventory and
running instances unauthenticated. So it is opened for the formation window
only, by spx admin init, and closed again on every exit path.

The reconcile then deadlocked. Holding out for the full chassis list is right
on a node with no policy loaded, but on one armed for a smaller cluster the
ports a joining node needs in order to register its chassis are exactly the
ones the stale set blocks, so the list can never complete. Widen the peer set
on the tunnel set already loaded, and report the partial state so the caller
retries sooner than the steady-state interval. A converged cluster whose
Southbound DB is briefly unreadable is still left untouched.

* docs(install): explain the firewall around cluster formation

An ISO-installed server is a cluster of one, and its firewall admits internal
cluster traffic only from members it recognises. Forming a cluster out of such
servers therefore needs the firewall off first: step 3 of the multi-node guide
has each server dial node 1's OVN database on the raft ports, and those are
peer-scoped like everything else on the cluster plane. Neither guide said so,
and the failure is a silent drop that looks like a network fault.

Both guides now walk the off / form / on sequence, and the multi-node guide
gains a reference section covering which ports are public, how arming differs
between the ISO and the binary installer, and how to verify membership landed.

Re-enable the boot-time unit whenever the daemon arms the policy. Disabling
the firewall to form a cluster also disables that unit, so re-arming used to
look complete while leaving the node bare after its next reboot.

* fix: make the ISO-to-cluster conversion path work end to end

Forming a cluster from four ISO-imaged servers surfaced a run of bugs that
share a starting state CI never exercises: the ISO delivers an initialized,
armed, running node, while the conversion path was written against the binary
installer's unconfigured one.

- install-node.sh never disarmed the host firewall, so nodes 2 and 3 could not
  dial the first node on the OVN raft ports and formation could not proceed. It
  now owns the whole lifecycle: disarm, form, re-arm, then verify the loaded
  policy against the expected peer set.
- spx admin init left the admin access key and secret empty on the preserve
  path. The pair cannot be read back, and the IAM store is rebuilt by formation,
  so the empty strings reached every joiner's bootstrap.json and crash-looped
  awsgw. It is reissued instead, and IAM seeding now skips an empty admin block
  rather than taking the gateway down on every restart.
- node-reset.sh left /etc/default/ovn-central behind. Raft membership lives in
  that file, not in the databases the reset deletes, so ovn-central recreated
  the database as a cluster member dialling a peer that had itself been wiped.
- node-reset.sh also destroyed the installed firewall policy, which nothing
  regenerates. set-peers then failed on every attempt and the node stayed open
  permanently and silently. The arming mode is read before the wipe and the
  stage regenerated after it.
- spinifex-firewall-apply rejected every verb when the policy file was missing,
  including disable. Turning the firewall off is the recovery path, so that left
  a node that could be neither armed nor disarmed.
- viperblock exited 0 on a fatal startup error, so Restart=on-failure never
  fired. During formation its JetStream bucket has no leader yet, so the EBS
  provider died for good and every volume request failed with no responders.
  predastore and qemunbd had the same bug.
- spx admin images import created image directories at 0700, so the first sudo
  import locked group members out of a tree deliberately made group-writable.

Three of these hid behind checks that cannot succeed: ovn-sbctl show against a
clustered database, and the OVN northbound and southbound waits in setup-ovn.sh.
All three failed to stderr and let the run continue, so a check that could never
pass was indistinguishable from one that was merely slow.

The USB install guide claimed the ISO leaves Spinifex unconfigured and told the
operator to run spx admin init. firstboot has always done that itself, so the
guide now describes what the ISO actually produces and how to start using it.

* fix: let spread placement launch across every node

A spread placement group reserved four distinct nodes correctly and then failed
the launch with ServerInternal, having started only two or three of them. The
scheduler was never at fault; two faults downstream stopped the instances
following the reservation.

vpcd subscribes to vpc.add-nat with QueueSubscribe, which delivers one message
at a time, and the handler holds its reply across the OVN flows barrier. The
45s caller deadline was sized against a single 30s barrier, which is right for
one instance and wrong for the N a spread launch issues at once — the third
request waits behind two full barriers and times out. That one subscription now
overlaps its handlers under a bounded semaphore. Each barrier still syncs after
its own write, so the guarantee is unchanged while N barriers collapse into
roughly one.

With the requests overlapping, every barrier still ran to its alarm.
install-node.sh computed OVN_REMOTE after building the database nodes and gave
it only to compute nodes, so the database nodes were configured without
--ovn-remote. setup-ovn.sh writes ovn-northd's NB/SB connections from that list
and skips it on the localhost default, and it already documents what follows: a
northd dialling only its local member stops advancing nb_cfg once raft
leadership moves, wedging ovn-nbctl --wait=hv. The list is knowable before any
node is touched, so it is computed first and passed to the database nodes too.

Nothing reported an OVN fault while this was happening. Every chassis was
registered, ovn-controller and IPsec were up, and the raft cluster was healthy.
The only signal was the barrier logging that it had overrun and was continuing
without confirmation — which reads like slowness and was a permanent wedge.

* feat: sweep block sizes in the disk benchmark and add an iperf3 network benchmark

* fix: use iperf 2 with CSV output and report why a remote start failed

* fix: stop pkill matching its own shell and verify the iperf server is listening

* ci: run the predastore throughput benchmark at the end of the nightly

* ci: boot the ISO in the nightly, single-node and three-node

* ci: use the existing CI node password secret in the ISO cells

* ci: report free space before the benchmark instead of failing inside warp

* ci: keep the benchmarks and node disks off tmpfs

* ci: export the work directories from RUNNER_TEMP rather than job env

* ci: run the ISO and benchmark workloads from the nvme scratch area

* perf: run guest NICs on vhost-net with multiqueue

Guest-to-guest VPC throughput measured 1.68 Gbit/s single-stream against
21.8 Gbit/s host-to-host on the same underlay, and did not improve with
more streams. QEMU's -netdev tap defaults vhost to off, so the whole
datapath ran in the main loop thread in userspace: that thread sat at
59-65% CPU while all four vCPU threads idled at ~4%.

Every tap netdev now carries vhost=on, and VPC ENIs additionally run
multiqueue at min(vCPUs, 8) queue pairs. Multiqueue needs all three of
the tap, the netdev and the device to agree, so TapNetDev and NetDevice
derive the netdev options and the 2N+2 MSI-X vector count from one queue
figure rather than leaving callers to keep them in step.

The QMP hot-plug path takes the same options as cold boot, with a test
comparing it against the rendered cold-boot strings so the two cannot
drift. MMIO machines stay single-queue: they have no MSI-X.

* ci: check out the sibling repos the go workspace needs in the ISO cells

* ci: skip cell-21 workload cleanup when the workload never ran

* ci: size the cell-21 node at 8 GiB and keep its serial log

* ci: keep the cell-21 node diagnostics alongside the serial log

* fix: let the daemon open /dev/vhost-net and delete multi_queue taps

Enabling vhost=on broke instance launch two ways. DevicePolicy=closed gates
the cgroup device list before capabilities are consulted, so QEMU's open of
/dev/vhost-net returned EPERM despite CAP_DAC_OVERRIDE; add the device to the
allow list and bump the unit version. Separately, `ip tuntap del` re-opens the
device with TUNSETIFF and fails with EINVAL on a multi_queue tap, leaking it on
every teardown; route deletion through `ip link del`, which is flag-agnostic.

* perf: default guest NICs to a single queue

Multiqueue measured a net loss. Spreading one flow across queue pairs reorders
packets and TCP reads that as loss: a 4-vCPU guest fell from 1.76 to 1.50
Gbit/s, with cwnd collapsing on spurious retransmits. The host overlay funnels
a node pair onto one softirq core, so the extra queues have no headroom to win
back what the reordering costs. Keep the plumbing and its tests behind
MultiqueueNICs so re-enabling is one line once that funnel is fixed.

vhost-net stays on unconditionally; it moves the datapath off the QEMU main
loop, measured at 60% of a core under load against 3% with it.

* fix: raise the UDP receive buffer for predastore's QUIC transport

Predastore carries blob, meta and raft over QUIC and quic-go asks for a 7MiB
receive buffer. Left at the kernel default of 208KiB it silently dropped
datagrams under load: the four-node cluster had shed 80k-125k each, which
failed shard writes, put raft into repeated elections, and ultimately handed
guests an I/O error that cost two of them their root filesystems.

Adds a sysctl stage writing /etc/sysctl.d/99-spinifex-net.conf, so the setting
lands in the ISO image and on every node push rather than living in a runbook.

* ci: give the cell-21 workload an identity the node accepts

* feat: tie the guest MTU and NIC multiqueue to ipsec_enabled

ESP costs 34 bytes on top of geneve's 58, so a cluster running the overlay in
plaintext can advertise 1442 instead of 1408 — worth roughly 10% of guest
throughput. Derive it from network.ipsec_enabled rather than hardcoding the
conservative figure.

Multiqueue moves with the same flag, because its sign depends on it. Behind
IPsec it costs ~12%: ESP has no L4 ports, so RSS funnels a node pair onto one
core and extra queues only reorder packets, which TCP reads as loss. Without
IPsec the sending host's single vhost thread saturates first and queues are
worth +54%. IPsec on with multiqueue on is the worst of the four combinations,
so it stops being a standalone knob and becomes vm.Deps.MultiqueueNICs.

The reconciler only ever created a subnet's DHCPOptions row and never revisited
it, so the create-time MTU stuck for the life of the subnet and this change
would have applied to new subnets only. Worse in the other direction: turning
IPsec back on would have left subnets advertising 1442 over ESP, which drops
large segments with no ICMP to recover from. applySubnets now diffs and updates
in place.

reconcile.Config takes IPSecDisabled rather than IPSecEnabled so the zero value
is the conservative MTU — a caller that forgets it is merely slower.

* docs: add an install-time performance tuning guide

Measured on the four-node cluster rather than inferred: the UDP receive buffer
sysctl, what IPsec actually costs and why, the multiqueue sign flip, the overlay
MTU budget, and the jumbo-frame check that must precede enabling it.

A starter doc — several sections end in an open question rather than a
recommendation.

* ci: keep the cell-21 node alive for the workload step

* ci: collect the cell-21 qemu log and widen its timeout

* feat: derive the guest MTU from the fabric, and deepen the virtio NIC config

The overlay overhead is passed on to the guest rather than hidden from it.
Hiding it means running the fabric far enough above 1500 that a standard guest
MTU fits in the headroom, which is what the large public clouds do — but they
own the switches. On a fabric we do not control, the honest figure is the one
the path can carry, and a jumbo underlay should reach the guest: 9000 gives
8942, or 8908 with IPsec. network.underlay_mtu is the lever; SubnetMTU spends
it. Configured rather than probed, because a node's own NIC MTU says nothing
about the switch between it and its peers.

host_mtu sets VIRTIO_NET_F_MTU so a guest that never takes a DHCP lease —
statically addressed, or IPv6-only — still learns the ceiling.

rx/tx_queue_size raise the virtio ring from QEMU's default 256. That default is
a packet-rate ceiling rather than a memory saving: a vCPU preempted for a
fraction of a millisecond fills all 256 slots and the overflow is dropped.

ethtool is the only way to read NIC offload, ring and channel state, so a node
without it cannot be diagnosed for throughput at all.

* ci: give the cell-21 workload its own guest key

* fix: set the guest MTU on the tap, not just in the guest

The tap was created and brought up without an MTU, so it stayed at the
kernel default of 1500 while DHCP and host_mtu told the guest something
else. Harmless at 1442; it silently blackholed every large frame on a
jumbo underlay, with no ICMP back because the drop is at the first hop.

TapSpec.MTU comes from the same guest overlay MTU the DHCP option and
host_mtu already use, and is applied in the bring-up call so a size the
fabric cannot carry fails the launch instead of degrading quietly.

* fix: stop setting tx_queue_size, which QEMU caps at 256 for tap

QEMU only honours a tx_queue_size above 256 for vhost-user and
vhost-vdpa backends. On a tap it rejects the value outright rather than
clamping it, so every launch died with "must be a power of 2 between
256 and 256" and the instance went straight to terminated.

rx_queue_size is unaffected and stays at 1024. A test pins the absence
of tx_queue_size across machine types and queue counts.

* docs: lead the tuning guide with the overlay segmentation finding

The guide's headline was a 5.4x that came almost entirely from turning
IPsec off, and it treated MTU and the fabric as the main levers. The
host reaches 92.6 Gbit/s at MTU 1500 on the same NIC, so the fabric is
not the constraint and the encrypted default is not the thing to tune
away from.

Adds the host-versus-guest comparison up front, documents
network.underlay_mtu, and makes the missing segmentation offload the
first open question.

* ci: stop deselected matrix cells failing in teardown

* docs: quantify what disabling overlay IPsec is worth

The guide described the trade without the numbers an operator needs to
make it. Adds the measured 4.9x, notes that the MTU and multiqueue
changes follow ipsec_enabled rather than being separate knobs, and
records two transition hazards: a stale wide MTU on running guests, and
RunInstances failing while the OVN flows barrier catches up with the new
SAs.

* ci: collect and retain the e2e benchmark and cluster logs

Cells 21 and 22 both copied two paths that only ever exist on the nodes, so
the benchmark JSON was never uploaded and cell-22 collected nothing at all.
Both now gather what they actually produce, and keep it for 90 days.

* fix: quieten spx by installing an explicit CLI logger default

spx never set a process logger, so it inherited whatever a linked package
left behind — until now a JSON handler at Info on stdout, interleaving
library log records with command output and breaking piped use.

Execute() claims the default before any command runs: text on stderr,
LevelError, so commands report failures through their own stderr writes and
libraries stay quiet. --verbose/-v raises to info and SPX_LOG_LEVEL sets an
arbitrary level, the flag winning over the environment. Service subcommands
still call initTelemetry, which replaces the handler outright.

No root --debug flag: viperblock, qemunbd, nats and awsgw each define their
own --debug with a service-specific meaning, and a root persistent flag would
shadow inconsistently depending on the command.

The guard test samples the handler at package-init time rather than inside
the test, because tests in this package start services that install their own
logger legitimately.

* feat: private /admin/CreateAccount for self-service tenant signup

Add POST /admin/<Method> to the AWS gateway: SigV4-signed, JSON in and
JSON out, callable only by an IAM user in the super-admin account holding
spinifex:<Method>. CreateAccount is the one method, so a signup form can
provision a tenant without an operator shell. No new service, port, unit
or certificate — it mounts inside the gateway's existing authenticated
group and inherits its auth, throttling and tracing.

Provisioning is resumable rather than transactional, which fits stores
that have no transaction. Two CAS creates carry the correctness: the
client token admits one in-flight attempt and makes a lost response
replayable for 24 hours, and the name reservation makes duplicate account
names impossible. Every step after the account exists is create-if-absent,
so a retry with the same token finishes the job instead of failing.

The CLI and the endpoint share one provisioning helper, which closes a
gap on both at once: CreateAccount never checked names, so running
`spx admin account create` twice produced two accounts that differed only
by ID.

The response waits for the account's default VPC over a new
ec2.EnsureDefaultVpc request/reply, rather than trusting the existing
fire-and-forget iam.account.created publish — credentials for an account
that cannot launch anything are worse than a slower call.

[signup] max_accounts bounds how many accounts may exist; absent means
uncapped, which is what every cluster does today.

* fix: stop the awsgw template hardcoding one deployment's console URL

console_url shipped as https://console.spx3.com, so every fresh install —
including an on-premise cluster that will never run signup — was
configured to point new accounts at our console. It is the only
deployment-specific domain in any template. It now ships empty, and the
gateway warns when it provisions an account without one, since a blank
sign-in link is otherwise visible only to the customer who receives it.

Extract the remote client from the command body while here. The signing,
request shape and error decoding are the part a Cloudflare Worker
mirrors, and as a function they are testable against a TLS test server
rather than only by hand against a live cluster.

* refactor: drop console_url from signup and default max_accounts to 128

The gateway never read console_url — it passed the value straight through to
the response, and the idempotency record froze it for 24 hours so a corrected
typo still replayed stale. The client that made the request already knows
where it wants to send the new tenant.

max_accounts is now a pointer in the parsed config so an absent [signup]
section takes the 128 default while an explicit 0 still means uncapped.

* feat: run the predastore fault-injection harness as cell-24

Cell-23 asks how fast predastore is when every node is healthy; cell-24 asks
whether it survives one that is not. It runs after cell-23 rather than beside
it: both want a quiet single runner, and a benchmark sharing a machine with a
fault injection run measures the wrong thing.

The port offset keeps the two clear of each other even so, and the job clears
stale nodes on entry and exit, since a run killed before its cleanup trap
leaves one holding ports that fail the next run somewhere unrelated.

* ci: keep the throughput benchmark's output with its results

The run log only existed in the job log, so the artifact it uploaded could not
be read without going back to the run that produced it.

* ci: keep the fault-injection run log with its results

events.txt carries the timeline and the FAIL line, but not the build output or
anything Warp wrote before the harness took over, so a failed cell could only
be read from the job log it was printed into.

* fix: serve the cluster region to the console instead of hardcoding it

The console hardcoded ap-southeast-2 as its SigV4 region in seven files, so on
any other cluster the credential scope was wrong and the gateway rejected every
signed request.

The SPA is embedded in the binary, so a build-time value would pin one binary to
one region. The UI server now serves GET /api/config with the region, no-store
so a proxy fronting several clusters cannot serve one the other's region, and
the SPA loads it once before render.

The region comes from the serving node's config because awsgw pins signature
verification to that same field. Reading the cluster-wide [aws] region instead
would let a cluster whose two keys disagree pass review and still fail to
authenticate.

Also relabels the login card as Spinifex credentials, since the fields are not
AWS ones, and hides the CA install banner unless the console is reached
directly: behind a proxy with a publicly trusted certificate there is nothing
for the cluster CA to fix.

* fix: say once when the host firewall will not be maintained

Both quiet outcomes of the reconcile — no cluster config, and the policy
switched off — return nil without logging, so a node that never arms is
indistinguishable in the journal from one that armed on its first pass.

* test: arm the host firewall before asserting on its peer set

Only the ISO install arms the policy; every other path writes off to the
mode file, so the daemon disables the firewall and never writes a peer
set. The test read that file as its baseline, which it could never have.

It now switches the mode on for its own duration and puts it back, waits
for the peer set the way install-node.sh does, and on failure reports the
mode, the node count and what the daemon said rather than just the
missing file.

* test: move the console region test to the external cmd package

It was in package cmd, which test-package-check rejects, so preflight
failed on the branch. The hook follows the pattern already in
export_test.go.

* test: make the reboot EIP diagnostic capable of naming the drop

The two ofproto/trace probes injected packets with no TTL, so OVN's router
killed them at lr_in_ip_input and both traces ended early for a reason that
had nothing to do with the failure under investigation. A keyword filter then
stripped the table-match lines, hiding where each trace stopped.

Traces now carry a TTL and are kept whole, the real datapath megaflows for the
guest reply are dumped alongside them, and any drop matching the guest source
is resolved from its OpenFlow cookie back to the Southbound logical flow that
installed it.

* fix: exempt an EIP instance from the subnet drop gate with allow, not reroute

A subnet with no route of its own carries a priority-1100 drop policy, and an
instance with an external IP is lifted above it by a priority-1200 policy. That
policy rerouted to the pool gateway, which in distributed NAT is outside every
logical router port subnet, because the gateway LRP is the link-local /30. The
static default route survives that by naming an output port; a routing policy
has no such field, so ovn-northd discarded all three of them and the drop gate
below swallowed everything the instances sent.

The effect was that every external IP answered inbound traffic and none of it
came back: the SYN reached the guest, the guest replied, and the reply died in
the router's policy stage. Guest-initiated egress was lost the same way.

The policy only ever needed to lift the gate. The router's default route already
points at the gateway, so allow leaves the routing decision intact and gives
northd nothing to reject.

* test: match the log the firewall quorum gate actually emits

The assertion waited for "chassis encap addresses; not writing a partial peer
set", which no code has ever logged. The reconcile reports a short chassis list
as "OVN reports N of M chassis encap addresses" and the maintain loop carries
that into its retry warning, so the wait could only ever time out.

Arming the node in the previous commit got the test as far as this assertion for
the first time, which is why it surfaced now. The failure also prints the
journal tail and the same inputs the earlier wait reports.

* fix: stop one unreadable volume document failing every volume listing

A single volume document whose shards no longer reconstruct made
DescribeVolumes, DescribeVolumeStatus and DescribeVolumesModifications
fail for every account, because the listing returned the first fetch
error rather than skipping the document.

ListVolumes now skips a document it cannot read or decode and logs the
skip, mirroring ListAMIs. Callers whose answer would be wrong rather
than merely partial take ListVolumesStrict: the orphan scan and the
snapshot in-use check both gate destructive work on a complete list.

The tolerance covers fetch failures as well as decode failures. An
object whose shards no longer join is as unusable as one whose bytes
will not parse, and it was the fetch path that took the cluster down.
2026-08-15 14:22:49 -05:00
Josh Siviour f7a2d85691 fix(e2e): stop flagging a Cluster bind to a single-homed node's own address (#789)
checkSocketScope compared a socket's bind address to node.Addr and called
it the node's WAN address, but node.Addr is the cluster peer address
(harness.Node's own doc). On CI's single-homed tofu nodes this is the
node's only address, so every Cluster-scope service failed no matter what
it bound. Compare against a positively-known SPINIFEX_WAN_IP instead,
distinct from the peer address, and record via harness.Detail when no
such address is available so the skipped check is visible rather than
silently passing.
2026-08-13 15:19:23 +10:00
Josh Siviour b93f6c258a fix(e2e): resolve the listener inventory without a Go toolchain on the target node (#787)
* fix(e2e): resolve the listener inventory without a Go toolchain on the target node

tests/e2e/multinode/listener_invariant_test.go resolved
docs/security/network-connections/README.md at runtime via `go env
GOMOD`, which works under `go test` but not inside a compiled .test
binary shipped to a node with no Go toolchain. Embed the doc in a new
docs/security/network-connections package instead, so the content is
compiled into the binary and every caller parses bytes rather than a
resolved path. RepoRoot and DocPath are now unused and removed.

* docs: trim the embed package comment to the three-line standard
2026-08-13 14:18:02 +10:00
Josh Siviour 7d99705eff fix(e2e): kill the node-failure phase abruptly instead of draining it (#785)
* fix(e2e): kill the node-failure phase abruptly instead of draining it

Phase 8 used `systemctl stop spinifex.target`, which now drains guests
gracefully since the target-stop drain fix landed, so it tested an
orderly shutdown rather than a failure. Since a target unit has no
process of its own and cannot be signalled, and PartOf= only
propagates stop/restart jobs rather than kill, SIGKILL each core
service's main process directly instead, leaving orphaned guest
qemu/nbdkit processes for recovery to reattach.

Also fix a stale comment on spinifex-predastore.service's
TimeoutStopSec: it claimed to match viperblock's drain budget, which
is now 150s rather than 30s. The value was already correct; only the
rationale was outdated.

* fix(e2e): hold node2's outage open through Phase 8's assertions

Restart=on-failure was respawning each killed unit within ~5s, so
every Phase 8 assertion ran against an already-recovered node2 and
DEGRADED_PEERS never actually dropped. Stop the same units right
after the kill to cancel the queued restart and keep them down for
the rest of the phase, and make the NATS degraded-peer count a real
assertion (sized off NODE_COUNT) now that it can genuinely fail.
2026-08-13 12:30:15 +10:00
Josh Siviour 57bfbc20df test: listener invariant static guard + e2e runtime check (#782)
* test: add the listener invariant static guard and e2e runtime check

Adds both halves the plan called for: a static test in
spinifex/network/invariants that scans install scripts and config
templates for a bare OVSDB ptcp remote, a wildcard bind on a
Cluster/Encap port, or a bind port absent from the inventory, and an
e2e test in tests/e2e/multinode that asserts the same on live ss
-tulnp output. Both read
docs/security/network-connections/README.md "## 1. Inbound
Listeners" as their fixture through a shared, non-test parser package
(spinifex/network/listenerinventory), so a wildcard exception has to
be declared in the doc's own prose rather than hardcoded in either
test.

* fix: make the listener wildcard exception fail closed on an explicit marker

The prior heuristic granted an exception for any unnegated "wildcard"
or "0.0.0.0" mention within 40 characters of the port's row. That
fails open: a future row phrased as "avoids the wildcard" or with a
negation further upstream than the window would silently exempt
itself. Replace it with a single exact literal phrase, "binds the
wildcard by design", that a row must contain to grant the exception —
no other wording counts, so an unrecognized mention denies rather
than grants. Update the two rows that need it (5300, 500/4500) and
document the marker's role in the inventory's own prose.

* docs: record that the Geneve tunnel socket binds the wildcard by design
2026-08-13 12:29:26 +10:00
Julian Sommer 65d2501e6b feat: add MariaDB as the second RDS engine (#762) 2026-08-13 10:38:18 +10:00
Josh Siviour fd8be8a814 refactor(test): route duplicated NATS bootstraps through testutil (#776)
* refactor(test): route duplicated NATS bootstraps through testutil

Thirteen test sites hand-rolled a NATS or JetStream server bootstrap that
spinifex/testutil already provides, and one seedKV clone duplicated
testutil.SeedKV. Route them through the shared helpers.

Sites whose options genuinely diverge are left alone: fixed ports needed for
reconnect and restart scenarios, custom TLS and token auth, a custom
MaxPayload, and TestMain entry points that have no testing.TB for t.Cleanup.
The natgw and routetable seedKV clones use CreateOrUpdateKeyValue rather than
CreateKeyValue, so their failure behaviour differs and they stay as they are.

Also moves eight test files to external test packages where they declare no
helper used by a sibling in the same package. Coverage is unaffected: Go
compiles internal and external test packages into one binary per package, so
attribution is identical either way.

* chore(test): require new test files to use an external test package

Adds a preflight check that fails when a newly added test file declares an
in-package test. External test packages bind tests to the exported API and
let packages share test doubles, which an in-package double cannot be. Only
added files are checked, so the existing in-package tests are untouched.

e2e and integration suites are exempt: both share a package-level fixture
built in main_test.go, so their files cannot move individually. A file that
needs unexported access can opt out with a //test:in-package comment.
2026-08-12 22:38:15 +10:00
Josh Siviour 9427cdfc2d fix(test): give each predastore fixture its own S3 gate port (#775)
The fixture pinned its S3 gate to 127.0.0.1:18443. Three test binaries import
it and go test runs packages as concurrent processes, so two clusters raced
for the port. The loser did not fail cleanly: waitForReady probed the winner's
gate on the same port and reported healthy, so the setup client talked to
another process's cluster and failed with BucketAlreadyOwnedByYou.

Reserve a port per process instead, and reach the gate only through
Fixture.Host so it cannot be hardcoded again. A Start that fails partway now
drains the cluster before returning; its nodes hold process-wide pipe names
that a later attempt would otherwise collide with.
2026-08-12 22:37:54 +10:00
Josh Siviour 91d22d9f12 feat(security): add an nftables host firewall scoping cluster ports to peers (#769)
* feat(security): add an nftables host firewall scoping cluster ports to peers

Nodes shipped no host firewall, so every cluster listener — OVN NB/SB, the
formation port, NATS, predastore — was reachable from anything that could route
to the node. On a single-NIC node the planes collapse onto the public address,
which made that the default rather than the exception.

setup.sh installs a policy and an apply helper but does not enable them: the
peer set is unknown until the cluster's planes resolve, and a drop policy with
an empty set would cut the first node that applied it out of its own formation.
install-node.sh writes the peers and enables the unit after formation.

The policy owns only table inet spinifex_filter and replaces it in one
transaction. vpcd writes MASQUERADE and per-EIP FORWARD rules into the ip
nat/filter tables and reinstalls them only on start, so a whole-ruleset flush —
what Debian's nftables.service does on both start and stop — would break
elastic IPs silently. INPUT only, for the same reason: a forward-hook drop here
could not be rescued by an accept in the other table.

Guest traffic keeps working: IMDS and VPC DNS terminate on ime-* ports in the
host netns, and every guest agent reaches its control plane over the AWS
gateway rather than NATS, so no cluster port needs to face the guests.

* feat: reconcile the host firewall peer set from the daemon

The peer set was written by install-node.sh and by cluster-bootstrap.yml. That
missed two of the four formation paths (bm-bootstrap.sh and the ISO firstboot),
duplicated the same logic in each, and went stale as soon as a node was added or
replaced. host.ReconcileFirewall now owns it: every formation path starts the
daemon, and it re-runs on each startup.

A node's own config names its peers by their wan address only, so a set built
from config alone drops every peer's NATS, OVSDB and formation traffic. The
lan plane comes from the generated NATS cluster routes and the OVN remote lists,
and the vpc plane from the Southbound Encap table; an empty encap answer is an
error rather than a narrower set.

ProtectSystem=full applies to the sudo child too, so the root helper could not
write /etc/spinifex/firewall either — it is now in the daemon's ReadWritePaths,
optional so a node installed before the firewall stage still starts.

The apply helper gains set-peers and disable verbs, re-validates every address
as a dotted quad with in-range octets, and rolls the peer file back if the
ruleset will not load.

* fix: retry the host firewall reconcile until every chassis registers

The peer set is only safe to write once OVN reports an encap address for
every node. On a fresh bootstrap the daemon routinely wins the race against
ovn-controller, so a single startup attempt saw a partial chassis list and
either wrote a set that dropped Geneve from the nodes missing from it, or
failed outright and left the node with no policy until a restart.

Gate on the full chassis count and schedule the reconcile instead of running
it once: back off from 15s to 5m while it fails, then re-run every 5m so a
node added or replaced after formation is picked up without a daemon restart.
An unchanged peer set short-circuits before the helper runs.

* test: cover the firewall chassis quorum gate in the multinode e2e suite

A partial chassis list is the normal state early in a bootstrap, and writing a
peer set from one produces a firewall that drops Geneve from every node missing
from it. The gate that refuses that write had no live coverage: a 5-node
bootstrap converges too fast for any daemon to observe a partial list, so the
verification run only ever exercised the OVN-unreachable path.

Reach the branch by inflating the expected count instead of breaking OVN: a
phantom node in one node's config makes the cluster one chassis short, with
nothing in the Southbound DB disturbed. Asserts the gate logs, that no peer
file is written while it holds, that the loaded ruleset survives, and that the
node recovers to a byte-identical peer set once the phantom is removed.
2026-08-12 22:37:27 +10:00
Josh Siviour 98ec781629 feat: decouple the EC2 control plane from the viperblock engine behind an EBSProvider contract (#770)
* feat: introduce the EBSProvider interface and control-plane metadata store

Phase 1 of decoupling the control plane from viperblock. Adds a
provider-neutral block-storage contract that spinifex owns end to end.

ebsprovider defines EBSProvider, whose operation set and idempotency rules
follow the CSI controller service, with NATS request/reply as the transport
rather than CSI's gRPC. Every request and response carries an explicit schema
version so wire skew fails loudly at the boundary instead of silently decoding
a changed payload. The package deliberately exposes no viperblock types:
provider-specific state is an opaque handle. Ships with a NATS client against
the ebs.provider.v1.* subjects and an in-memory fake for tests.

ebsmetadata gives spinifex its own volume and AMI documents under a spinifex
key prefix, so the control plane can answer DescribeVolumes and DescribeImages
without reading the storage engine's persisted state.

The EC2 volume and snapshot handlers gain provider-backed paths for create,
describe, modify, attach-state and delete. Provider injection is optional for
now, so the existing engine path stays the default until the viperblockd side
serves the new subjects and the metadata migration lands.

vm/lifecycle.go no longer imports viperblock; FindFreePort was the only symbol
it used and is now a local helper.

* feat: serve the EBS provider contract from viperblockd

Gives the ebsprovider NATS client a server. Volume create, describe, expand
and delete, plus snapshot create and delete, are now handled by the daemon
that owns BaseDir and the mounted-volume registry, which is where viperblock
engine construction belongs.

Every handler prefers an already-mounted engine over opening a second one on
the same volume, and expand refuses outright while the volume is mounted.
Opening a second engine on a live volume is the double-writer hazard this
decoupling exists to remove, so the boundary enforces it rather than trusting
callers. Requests carrying an unrecognised schema version are rejected at the
boundary instead of being decoded on a best-effort basis.

Snapshot creation replies immediately with an operation ID and completes
asynchronously on a per-snapshot subject, since a large volume will outrun the
request timeout. Draining the volume stays with the caller: it coordinates
with the guest and is not something the storage boundary can reach.

The snapshot create subject gains an explicit create verb. Addressing it as
ebs.provider.v1.snapshot.<volumeID> collided with the snapshot delete subject
and left the wildcard unsubscribable.

Publish and unpublish are not served yet; the mount and unmount logic they
would front is still inline in launchService and needs extracting first.

Also adds a conformance suite that runs one set of contract assertions against
both the in-memory fake and the NATS client, so each side is checked against
the contract rather than against the other's structs.

* feat: let an operator select the EBS provider

Adds an [ebs] provider key and wires the NATS provider into the EC2 volume,
snapshot, image and instance services at the daemon's composition root. Until
now nothing injected a provider, so the provider-backed code paths in those
services were unreachable.

The key is provider-neutral rather than nested under [viperblock], because it
names the boundary rather than one provider's settings; a second provider will
not need it renamed. An empty value resolves to "embedded", so deployed config
files that predate the key keep today's behaviour, and an unrecognised value
is a startup error rather than a silent fallback.

Startup probes the provider's capability verb and warns when nothing answers.
The daemon and viperblockd start independently, so an unanswered probe is not
fatal, but without it a misconfigured node fails much later as an unexplained
request timeout on the first EBS call.

"viperblockd" stays experimental: under it volume metadata lives in the
control plane's own document, and the leak reaper, GC and admin paths still
read viperblock's config.json, so they cannot see tenant or tag data for
volumes created that way.

* fix: make every volume-metadata consumer provider-aware

Several readers and writers of volume metadata were never given a provider
branch, so under the viperblockd provider they silently used the wrong store.
Each of these is a correctness bug rather than a missing feature, because the
control plane had already stopped writing the document they read.

Modifications had nowhere to live: ModifyVolume built its result in memory and
dropped it, and DescribeVolumesModifications read it back out of viperblock's
config.json, so a describe straight after a successful modify returned nothing.
Volume metadata now carries its own modification record.

The leak reaper read attachment and tags from config.json and wrote orphan
markers to tags.json, neither of which exists for a provider-managed volume, so
a leaked volume was invisible to it and any mark it did write could not be read
back. Tag mutations had the same split: a tag applied after creation never
reached the document DescribeVolumes reads.

Snapshot deletion could not see a provider-managed clone, because a clone
records its source only in the control-plane document. That let a delete strip
chunks a live clone still reads, so it is fixed here rather than left for the
migration.

Volume enumeration and DescribeVolumeStatus were likewise scanning object
prefixes that a provider-managed volume does not create.

Also adds an encryption flag to the volume document, which DescribeVolumes had
been reporting as false unconditionally and snapshots could not carry at all,
and a list operation for AMIs so the image path can follow later.

The legacy path is unchanged; its invariant tests pass unmodified.

* feat: backfill ebsmetadata documents from legacy volume and AMI state

DescribeVolumes under the viperblockd provider enumerates only ebsmetadata
documents, so a volume created before the switch had no document and was
invisible rather than merely slow to read. A per-object read fallback cannot
fix enumeration, so both a backfill and a fallback are needed.

Add an object-store migration kind to the migrate framework. Predastore has no
conditional write, so an object-based version stamp would be last-writer-wins
across nodes; RunObject stamps progress in a caller-supplied JetStream KV
bucket instead, exactly as RunKV stamps a bucket's own version. The stamp is a
read-then-write rather than a compare-and-swap, so correctness rests on every
ObjectMigration.Run being safe to re-execute.

The backfill itself lives in migrate/ebsmetadatabackfill rather than beside the
numbered config migrations: it needs viperblock's VBState schema to decode the
legacy config.json, and migrate is imported by every handler that stamps a KV
bucket version. It converts what it can reach and skips unreadable objects with
a log, so one corrupt volume cannot hide the rest of the fleet.

ebsmetadata gains the legacy read fallback for the window before the migration
has run everywhere. It stays free of viperblock by taking the decode as an
injected function value, wired at the composition root, and the fallback is
retired by leaving it unset. A fallback read never writes the converted value
back, which would race the migration.

Prefix enumeration pages to exhaustion. Stopping at the first page would let
the backfill stamp itself complete having converted only the volumes it
happened to see, reintroducing the invisible-volume failure it exists to
prevent.

The migration runs from configureEBSProvider, so only when the provider is
selected; backfilling while the embedded engine is still authoritative would
produce documents that immediately go stale. Failure is fatal rather than
advisory, unlike the capability probe beside it. This makes the switch to
viperblockd one-way, which is now recorded on the config field.

* feat: serve volume publish and unpublish from viperblockd

PublishVolume and UnpublishVolume were the last unserved verbs on the provider
contract, and they are the ones that attach a volume to a VM. Until they are
served the provider path cannot boot an instance, so provider = "viperblockd"
cannot be verified end to end.

The mount and unmount logic was two large anonymous handler bodies inline in
launchService. Rather than write a second mount path, extract each into a named
function and have both the legacy ebs.mount/ebs.unmount handlers and the new
provider handlers call it. Two divergent implementations of nbdkit spawning and
the seal decision would be far worse than the inline bodies. The extraction
relocates code without rewriting it; response publishing stays in each handler
so the provider never publishes to ebs.mount.response.

Publish is idempotent: a volume this node already has mounted returns its
existing attachment rather than starting a second nbdkit against it, which is
the double-writer hazard the boundary exists to prevent. Unpublish preserves
the invariant that a failed seal leaves the volume mounted so a retry can
re-attempt it, and reports an error rather than success.

Both verbs are node-addressed, so they subscribe directly rather than through
the spinifex-workers queue group, and are registered only when NodeName is set.
There is no queue-group fallback: a subject that already names one node has
nothing sensible to fall back to.

Read-only attachment is refused rather than silently granted read-write, since
nbdkit is started read-write or not at all.

Also fixes a latent panic carried by the extracted mount path: viperblock.New
returns a nil VB alongside its error, and SetCacheSize was called on it before
the error was checked, so a failing New would have taken down the handler.

* feat: read and write AMI metadata through ebsmetadata

The backfill migration wrote ebsmetadata AMI documents that nothing read: every
AMI path still went through viperblock.AMIMetadata inside a VBState wrapper at
{imageID}/config.json. Give the image service provider branches for the AMI
read, write and enumerate paths, with enumeration going through ListAMIs rather
than an object-prefix scan, as DescribeVolumes already does.

AMIMetaLoader declared GetAMIConfig returning viperblock.AMIMetadata, putting a
viperblock type on an interface boundary in the instance package. It now returns
ebsmetadata.AMI on both paths, the embedded one converting before it returns, so
the boundary names no viperblock type whichever provider is selected.

The legacy-to-document mapping had accumulated three copies. Consolidate them in
ebsmetadata/vblegacy, a sibling package rather than a member so ebsmetadata
itself stays free of viperblock, and cover it with a reflective test that fails
when a field is added to either schema without being wired through. Sixteen
fields copied by hand in three places would have dropped one silently.

The admin image paths read whichever representation exists and write back to
that same one, so a provider-managed AMI never gains a spurious config.json.
FindAMIDependents now unions ebsmetadata volumes with the legacy prefix scan:
missing a dependent there deletes an AMI a live volume still needs, the same
class of bug as the snapshot clone path fixed earlier on this branch.

That union is built by hand rather than by wiring Store.ListVolumes' fallback,
which swallows per-ID read errors. This path deliberately fails closed on a
transport error so a delete cannot proceed on a partial picture, and the
fallback would have quietly turned that into failing open.

The CLI image import now also writes the document, best-effort, so an AMI
imported after the migration is not left reachable only through the fallback.

* fix(ec2): resolve volume config through ebsmetadata when a provider is configured

A provider-created volume has no vol-*/config.json — its metadata lives in
the ebsmetadata document. getBaseVolumeConfigAndEncryption read the legacy
key unconditionally, so AttachVolume reported a volume that DescribeVolumes
had just listed as available as InvalidVolume.NotFound.

Routing through ebsmetadata.Store also puts this path behind the legacy
fallback, so a volume created before the provider switch stays attachable.
The NoSuchKey remap now names the key it missed; its silence made the
original failure invisible in the daemon logs on every node.

* test(bench): add an EC2 control-plane latency benchmark

Measures the EBS control-plane operations either side of the provider
boundary, so the cost of the NATS hop can be stated rather than guessed.
Reports median and p95 with a bootstrap CI on the median difference, and
labels a delta indicative unless that CI excludes zero.

* fix(ec2): drain the volume before a provider snapshot

The legacy CreateSnapshot branch drains first so the snapshot reads a
current checkpoint; the provider branch did not, and viperblockd documents
the drain as the caller's responsibility. Both sides deferred to the other,
so an attached volume snapshotted stale data with no error raised.

DrainVolume and volumeAttachment now take the fallback state and instance
as strings rather than a viperblock.VolumeMetadata, removing a viperblock
type from an exported signature.

* feat(ec2): route the instance root volume through the EBS provider

RunInstances built its own viperblock engine to clone the AMI snapshot into
the root volume, which made every launch a second writer against a volume
viperblockd already serves. The launch now calls the provider's CreateVolume
with the AMI's snapshot and source volume, and records the result in
ebsmetadata so DescribeVolumes and attach can see it.

A snapshot clone needs both the snapshot ID and its source volume ID to
resolve base blocks, so CreateVolume in the volume handler now sends
SourceVolumeID alongside SourceSnapshotID; without it the daemon rejected
every create-volume --snapshot-id outright.

The gp3 IOPS and throughput constants move to spinifex/types so the instance
and volume handlers share one definition rather than duplicating literals.

* feat(ebsprovider): add a bounded volume seed to CreateVolume

The EFI variable store must be initialised from the launching node's firmware
VARS template, byte for byte. Passing a host path would not work: CreateVolume
is queue-subscribed, so any node can service it, and a foreign node's OVMF
package would bind the guest's pflash region to the wrong firmware build.

CreateVolumeRequest carries the bytes instead, as SeedData, and viperblockd
writes them at offset 0 in the engine it already builds. The seed applies only
when the create actually allocates the volume, so a relaunch never overwrites
a BootOrder the guest has since written.

JSON base64-encodes a []byte, inflating the payload by 4/3, so MaxSeedBytes
bounds the seed well inside the NATS max_payload the cluster runs with and
both ends reject an oversized seed with a clear error rather than letting the
publish fail. VolumeSeeding advertises the behaviour so a provider that cannot
seed says so instead of silently dropping the bytes.

* feat(ec2): route the EFI variable store through the EBS provider

prepareEFIVolume built a control-plane viperblock engine to seed the variable
store from the firmware VARS template, making every UEFI launch a second
writer against a volume viperblockd already serves. It now calls the
provider's CreateVolume with the template as seed bytes, so the store is
allocated and written by the daemon that owns the volume.

The template is still read on the launching node and shipped with the request.
CreateVolume is queue-subscribed, so any node can service it, and a VARS
region seeded from a foreign node's OVMF build would bind the guest's pflash
to the wrong firmware.

pflash refuses a VARS region that is not byte-exact, so the returned capacity
is checked against the template length; a provider that rounded up to a GiB
boundary would otherwise yield a guest that cannot boot.

The engine path stays behind a nil-provider guard until the legacy branch goes.

* feat(ec2): route image snapshots through the EBS provider

snapshotRunningVolume and snapshotStoppedVolume each built a control-plane
viperblock engine to take the snapshot backing a new AMI, making CreateImage
a second writer against a volume viperblockd already serves. Both now call
the provider's CreateSnapshot with the volume's provider handle.

The running path keeps its drain, which is what makes the snapshot current
rather than one predating a guest-triggered write. The stopped path needs no
drain, and the daemon already prefers a live mounted engine over opening a
second one, so it handles both cases itself.

getVolumeConfig read the legacy config.json, which a provider-created volume
does not have, so every CreateImage against one failed. It now reads the
ebsmetadata document under a provider, the same way attach does.

* fix(daemon): only the owning node creates an image for a stopped instance

handleEC2CreateImage is a fan-out. Ownership is established by vmMgr, which
only the node holding the VM passes, so a running instance is imaged once.
A stopped instance lives in the cluster-replicated KV instead, which every
node reads successfully, so all of them ran the full snapshot and AMI
creation. The caller saw the first reply and the rest leaked: on a three-node
cluster one create-image produced three AMIs and three snapshots.

A stopped instance records its owner in LastNode, so a node that is not the
owner now declines. Gather tallies error frames and keeps waiting, returning
only on a success, so declining cannot preempt the owner's reply.

An instance stopped by a build that never set LastNode elects an owner
through the KV's compare-and-swap, since having every node decline would make
create-image fail permanently for those records.

* perf(ec2): serve DescribeVolumes by ID from the volume documents

The provider branch called ListVolumes unconditionally and filtered in
memory, so asking for one volume read and decoded every volume document in
the bucket. The non-provider branch already had the equivalent fast path.

Explicit IDs now fetch their documents directly. The tenant check moves with
them: a document belonging to another account reports not-found rather than
being returned, matching what the enumeration filter did.

Measured against a memory object store, the fast path stays flat near 20us
regardless of bucket size while the enumeration grows linearly, reaching
4.6ms at 500 volumes.

* chore(lint): ban the viperblock import from the EC2 control plane

The control plane reaches block storage through ebsprovider now, but nothing
stopped a handler from importing the engine again. That is not hypothetical:
the instance handler first imported viperblock for a config struct alone, and
the engine construction followed thirteen days later.

depguard denies the import across handlers/, which matters because
viperblock.New starts a chunk uploader — every construction is a writer
against a volume viperblockd already serves. A types-only import is denied
too, since that is exactly how the last one started.

The four files still carrying the pre-provider engine path behind a
nil-provider guard are exempted by name. The exemption list is the remaining
work: it shrinks to nothing when that path goes.

* fix(ec2): refuse CopySnapshot instead of creating an unusable snapshot

CopySnapshot wrote a control-plane snapshot document under the new ID and
nothing else. The copy described correctly and CreateVolume against it
succeeded, so it looked like it worked, but the new ID had no viperblock
snapshot metadata behind it and the volume failed when the guest attached it.

Producing the metadata means re-sealing it under the destination ID. On an
encrypted volume it is AEAD-sealed with the snapshot ID in the AAD and the
sealing helpers are unexported, so spinifex cannot write it. Copying only the
unencrypted form would be dead code on any cluster with encryption enabled.

Refusing with UnsupportedOperation fails at the call the caller can act on
rather than at attach time. Source lookup and the ownership check still run
first, so a bad ID or another tenant's snapshot reports that instead.

* test(ec2): give handler test fixtures their own legacy config.json shape

Handler tests built the legacy config.json fixture by importing
viperblock's VBState/VolumeConfig/VolumeMetadata/AMIMetadata directly.
Mirror that shape in ebsmetadata/vblegacy, next to the production code
that already reads it (ebsmetadatabackfill), and switch the
fixture-only usages across the volume/snapshot/image handler tests to
it. A byte-for-byte equivalence test against the real viperblock types
guards the mirror from drifting out of sync.

Call sites that hand a viperblock type into putVolumeConfig,
mergeVolumeConfig, or buildVBConfig are untouched, since those
functions still name the real type in their signature.

* feat(ebsprovider): add CopySnapshot to the EBS provider contract

Adds a CopySnapshot operation to EBSProvider (types, ebs.provider.v1.snapshot.copy
NATS subject, MemoryProvider and NATSProvider implementations, conformance
coverage) and a viperblockd handler that duplicates a snapshot's metadata via
viperblock.CopySnapshotMeta on the source volume's VB.

* feat(ec2): serve CopySnapshot through the EBS provider

CopySnapshot has been refusing with UnsupportedOperation because a copy needs
its own snapshot metadata on the backend under the new ID, and on an encrypted
volume that metadata is AEAD-sealed with the snapshot ID in the AAD, so the
control plane cannot re-seal it. The provider contract now carries a copy
operation, so the storage engine does it.

The provider path generates a new snapshot ID, has the provider duplicate the
backend metadata under it, then writes the control-plane document. Rollback
mirrors CreateSnapshot: a failure after the copy deletes the provider snapshot
rather than leaving one nothing references. Ownership is still checked against
the source before anything is created.

The no-provider path keeps refusing. It has no way to produce the backend
metadata, and the copy it used to write described fine and then failed at
attach — a resource that fails as far as possible from the call that made it.

Adds MemoryProvider.Snapshot so a control-plane test can assert a snapshot
reached the provider rather than existing only as a control-plane document.
That assertion is what catches the old behaviour.

* refactor: remove the embedded EBS engine path from the EC2 control plane

viperblockd is now the only EBS provider. The pre-provider path that
constructed a viperblock engine in-process is deleted, and with it every
github.com/mulgadc/viperblock import under spinifex/handlers/ (tests
included). The depguard ec2-control-plane rule drops all four file
exemptions and the !$test carve-out, so the rule now reads simply as
"nothing under spinifex/handlers/** may import viperblock".

viperblock.VolumeConfig was also a data carrier on the provider path. It
is replaced by the spinifex-native ebsmetadata.Volume rather than the
vblegacy mirror: vblegacy mirrors a legacy on-disk shape whose only job is
decoding old objects, while ebsmetadata.Volume already carries every field
the call sites read, so the conversion step disappears instead of being
reimplemented against a legacy shape.

The embedded-only helpers (volumeConfigWrapper, putVolumeConfig,
mergeVolumeConfig, configIsEncrypted, putVolumeConfigViaDetached,
deleteS3Prefix, buildVBConfig, snapshotVolume, the ami-*/config.json
prefix scan) had exactly one production caller chain each, all through a
nil-provider branch, and are removed. The snapshot-dependency guard on
DeleteVolume is provider-agnostic and is kept, now running on the provider
path where it previously did not.

config: viperblockd is the default and an empty Provider resolves to it.
An explicit provider = "embedded" is rejected at config load rather than
silently upgraded, because starting anyway would migrate a node's volumes
to ebsmetadata one-way without the operator asking. The generated
spinifex.toml template emits viperblockd.

* fix(images): write the imported AMI document from the config the import wrote

ImportDiskImage creates the AMI's snapshot and records it on its own
*viperblock.VB, which viperblock.New allocates fresh, so the value lands only
in {imageID}/config.json. The import command was persisting the ebsmetadata
document from its pre-import manifest copy, whose SnapshotID is still empty.

Store.GetAMI only consults the legacy config.json fallback when the document
is missing, so that empty-SnapshotID document permanently shadowed the real
value and every launch from an imported AMI failed the zero-copy clone check
with ServerInternal.

Rebuild the document by reading back the config.json the import just wrote. A
missing or unreadable config is skipped rather than written from the stale
manifest: no document still resolves correctly through the legacy fallback.

* test(e2e): read NODE from spx get vms instead of VCPU in the spread check

spx get vms gained HEALTH and CRASHES columns, shifting NODE from field 6 to
field 8. The spread placement check still read field 6, so every instance
reported its vCPU count instead of its node, the unique-node count always
collapsed to 1, and the check failed on clusters that had spread correctly.

Read field 8 and strip the ANSI colour codes wrapping each cell.

* feat(viperblockd): add a --debug flag so viperblock debug logging is reachable

viperblockd hardcoded Info, and viperblock's VB.logger() falls back to
slog.Default() because vb.log is only ever set by SetDebug. That left the
engine's debug records, including the chunk uploader's start and disabled
lines emitted during New(), unreachable in a deployed environment.

Binds the namespaced viper key viperblock-debug and SPINIFEX_VIPERBLOCK_DEBUG
rather than the bare debug key, which several commands share. Also sets the
Config.Debug field, which existed but was set only by tests.

* fix(viperblockd): release the chunk uploader when openVolumeVB fails

viperblock.New starts a chunk uploader and a WAL syncer before the backend is
touched, so a failure in Backend.Init or loadStateWithRetry returned nil to the
caller while leaving both running with no handle to stop them. Repeated backend
failures on CopySnapshot, ExpandVolume or DescribeVolume accumulated uploaders
on a 30s ticker for the life of the process.

Adds invariant tests for both halves of the ownership rule: a mounted volume's
snapshot create and copy reuse the live engine and log zero volume opens, an
unmounted volume opens exactly one, and a failed open leaves no uploader behind.
The open counts are read from the same log record a production alarm watches.

* fix(ebsprovider): route requests to the node that owns the mount

Every viperblockd queue-subscribed the ebs.provider.v1.* verbs in one
spinifex-workers group, so NATS delivered each request to a random node. Only
the node holding the mount can reuse the live engine through findMountedVolume;
any other node constructed a second viperblock engine, with a live 30s chunk
uploader, against a volume nbdkit was serving on a different host. Measured on
a three-node cluster, this was roughly two snapshots in three.

Rather than resolve the owner, let the owner answer. A node subscribes
ebs.provider.v1.owner.<volumeID>.<verb> as a plain subscription when it mounts
a volume and drops it on unmount, mirroring the per-volume ebs.config
subscription. Clients try that subject first and fall back to the queue group
only on ErrNoResponders, which means nothing is mounted and opening an engine
is correct. A timeout deliberately does not fall back, since the owner may
still be running the operation.

Applies to snapshot create and copy, expand and describe, the four verbs that
reuse a mounted engine. Delete keeps queue dispatch.

* fix: rebuild viperblockd mounted-volume registry after a restart

Config.MountedVolumes is in-memory and rebuilt from nothing on start, so a
viperblockd restart while a VM keeps running leaves nbdkit serving a volume
the daemon has forgotten. Owner routing then infers from ErrNoResponders that
nothing is mounted and falls back to the queue group, which opens a second
viperblock engine, with a live chunk uploader, on another node. The same empty
registry also defeats handlePublishVolume's double-mount guard, so a republish
could start a second nbdkit.

Discover surviving nbdkit processes from /proc at startup and rebuild the
registry from them, following orphan_scan.go's precedent: match comm exactly,
parse the argv for volume=<id> and --unix/-p, and adopt a PID only when
nbdkit-vol-<volume>.pid names that same PID. Nothing is started, signalled or
killed; anything that fails corroboration is logged and skipped. Recovery runs
before the first subscription so no handler can race it.

Extract mountVolume's engine construction into constructMountedVB so mount and
recovery cannot drift, and release the WAL syncer viperblock.New starts when
construction fails after it.

* fix: corroborate recovered nbdkit processes from argv, not a pidfile

nbdkit is launched with -f (required for the Go plugin) and never writes the
--pidfile it is given, so no such file exists on any node; the daemon's own
/tmp is a PrivateTmp namespace besides. Corroborating against it rejected
every genuine mount, making recovery a no-op in production.

Corroborate against what the kernel actually has: the process must serve our
plugin, name this daemon's base dir, and still hold its socket. Adopt a volume
once, so two live nbdkits for it leave one registry entry and a warning rather
than two conflicting ones.

* feat: add a second EBS provider backed by qcow2 and qemu-nbd

The decoupling was justified by swappability that nothing demonstrated: the
conformance suite ran against MemoryProvider and against a NATSProvider wired
to a MemoryProvider, so both arms were the same implementation behind
different transports. A fake is not a second implementation.

Add three pieces. natsserve serves the ebs.provider.v1.* contract from any
EBSProvider, depending on nothing but the interface, and replaces the
test-only server twin so conformance now exercises production code. The
conformance suite moves to its own package and is exported so implementations
outside ebsprovider can run it, with no assertion changed. qemunbdd is the
second implementation: one qcow2 file per volume, qemu-nbd for publish, real
snapshot copies instead of chunk references, and every exec behind a runner
seam so its tests need no qemu.

Owner-subject routing is deliberately not served neutrally: it needs a
per-node mounted-volume registry the interface does not model, so it stays in
viperblockd and a neutral server's clients correctly fall back to the queue
group.

* test: run the conformance suite against the qcow2 provider

The suite passes unmodified against an implementation sharing no code with
viperblock, both in-process and through natsserve over the real wire
contract, which is the swappability claim the provider boundary was built to
support.

Two real defects it caught. ExpandVolume and GetVolume inspected the image
before consulting the publication map, so qemu-img could not open a volume
qemu-nbd held the write lock on and the refusal surfaced as an internal
error instead of ErrVolumeInUse; qemu-img info now runs with --force-share,
so describing a volume no longer depends on whether it is attached. Publish
also failed with qemu-nbd's raw exit status when the socket path exceeded the
108-byte AF_UNIX limit, and now reports that reason itself.

* feat: make the EBS provider selectable by config

Add the qemunbd selector alongside viperblockd, a spx service command that
serves the qcow2 provider over natsserve, and service registration. Config
validation accepts the new value everywhere viperblockd is accepted, while
embedded stays rejected by name.

The daemon logged a hard-coded viperblockd constant as the active provider
rather than the resolved one, in configureEBSProvider and in both of
probeEBSProvider's lines; all three now report what is actually configured.

Both daemons answer the same subjects, so exactly one may run on a cluster.

* test: add a live lifecycle check for the qcow2 provider

Drives create, publish, write, snapshot, restore and read-back entirely
through ebsprovider.NewNATSProvider against a real qemunbdd daemon on a
cluster node, so the client under test is the same shape the control plane
uses and never touches the provider type. Skipped unless SPINIFEX_QEMUNBD_LIVE
is set, so it stays out of preflight.

* fix: publish NBD URIs in the form standard clients accept

PublishedVolume.NBDURI carried nbd:unix:/path, which is QEMU's legacy
pre-URI filename syntax rather than an NBD URI. libnbd rejects it outright
with "URI must begin with 'nbd://'", so no NBD client but QEMU could ever
consume what the EBS provider boundary hands back.

Emit nbd+unix:///?socket=/path instead, the form libnbd, qemu and nbdkit
all accept. ParseNBDURI now takes both that and the TCP form, and still
accepts the legacy nbd:unix: syntax for state written by older daemons, so
a conformant third-party provider's URI is no longer rejected on the way
in either.

Verified against qemu 10.0.11: qemu-img and a real -drive option string
both open the URI form, and qemu reports both forms as nbd+unix://?socket=,
so it already treats the URI as canonical.

* test: validate published exports with libnbd's client tools

Every other assertion about the EBS provider goes through our own Go
client, so nothing has ever checked whether the export we publish is usable
by an NBD client that knows nothing about this codebase. That is the layer
neither the conformance suite nor a CSI-shaped contract can reach.

RunNBDClientSuite drives nbdinfo and nbdcopy against a published volume:
the URI connects, the export advertises its size and block-size
constraints, data written externally reads back byte for byte, a ReadOnly
publish sets the read-only transmission flag, and UnpublishVolume tears the
export down. It skips when libnbd-bin is absent rather than passing
vacuously.

Wired to qemunbdd, where all five failed before the URI fix. The publish
assertion in the main suite now requires a dialable URI instead of merely
a non-empty string, which is what let the wrong form through.

* test: run the external NBD client suite against a live viperblockd

The suite so far only ever saw qemu-nbd. Pointing it at viperblockd's nbdkit
export is the comparison worth having: one external client, two providers it
cannot tell apart, and every difference is a candidate leak in the boundary.

RunNBDClientSuiteWithConfig takes the node name and volume prefix a live
cluster needs, and publishForNBD now unpublishes and deletes what it created
so a run against a real cluster leaves nothing behind. Subtests dial a
normalised URI so a provider emitting the legacy syntax still gets its export
tested rather than every subtest failing on the same string; whether the URI
itself is standard is now its own subtest.

Adds a reconnect check, since publication holds the volume rather than any one
connection. It retries the real operation because a cheaper liveness probe is
itself a connection and re-triggers whatever refused it.

* feat: make the conformance suite capability-driven

The suite asserted a fixed Capabilities literal, so it could only ever pass
against a provider advertising exactly that set. Every implementation had to
match the suite rather than the suite testing the contract. RunSuite now reads
GetCapabilities from the provider under test and gates optional behaviour on
what it advertises, and the fixed literal is demoted to ReferenceCapabilities,
a convenience for callers constructing a MemoryProvider.

Add ReadOnlyPublish to Capabilities. A provider that leaves it false must
refuse a ReadOnly publish rather than hand back a writable export, which is
what viperblockd already does; it now has a way to say so up front.

Add ErrUnsupportedCapability and the unsupported_capability error code. A
request for optional behaviour a provider does not advertise is well formed,
so classifying it as invalid_argument told the caller to fix a request that
was never wrong. viperblockd's ReadOnly refusal is reclassified accordingly.

Declared capabilities now match observed behaviour: qemunbdd advertises
SparseExtentReporting (qemu-nbd exports base:allocation, confirmed with
nbdinfo) and ReadOnlyPublish (PublishVolume passes -r). viperblockd advertises
neither: the nbdkit Go binding exposes no extents callback, and the mount path
never passes -r.

The external NBD client suite gains a sparse-extent subtest that checks the
export's advertised contexts against the capability, so SparseExtentReporting
is falsifiable from outside rather than taken on trust, and its read-only
subtest now branches on the capability instead of assuming refusal.

Cover the new branches with a MemoryProvider advertising no optional
capabilities and one advertising OnlineExpansion, the branch no provider we
ship exercises.

* refactor: rename SourceVolumeID to SourceSnapshotVolumeID

CreateVolumeRequest.SourceVolumeID meant three different things. viperblockd
required it whenever SourceSnapshotID was set and used it to resolve the
snapshot's chunk references, so there it named the snapshot's origin volume.
MemoryProvider ignored it entirely. qemunbdd implemented it as an independent
volume-to-volume clone, which is what the name and doc comment implied. The
conformance suite could not catch the divergence because the reference
provider had no branch for the field at all.

The contract already has a field meaning "the volume this snapshot came from":
Snapshot.SourceVolumeID, which every provider populates. So the request field
is the same fact travelling back the other way, and its name was the problem.
Rename it to SourceSnapshotVolumeID, document it as the source snapshot's
origin volume, and state that it is required with SourceSnapshotID and
meaningless without it.

All three providers now enforce one rule: a source snapshot must be
accompanied by its origin volume, or the request is invalid_argument.
MemoryProvider additionally rejects an origin that does not match the
snapshot's own SourceVolumeID, so a wrong name fails instead of resolving
blocks against a volume the snapshot never came from. qemunbdd loses its
volume-to-volume clone branch, which implemented behaviour the contract no
longer offers and no caller ever requested.

The suite pins both the requirement and a full create-snapshot-restore round
trip, so the field is exercised end to end rather than only on the error path.

* feat: make the conformance suite runnable against a live provider

The suite had only ever run against MemoryProvider and qemunbdd, both of which
are discarded with the test binary. viperblockd, the provider production
actually uses, was the one implementation the suite never judged, because the
suite assumed each subtest got fresh state: hard-coded volume IDs collide with
an earlier run's leftovers on a store that keeps them, and a hard-coded node ID
addresses a node that does not exist.

SuiteConfig adds NamePrefix, NodeID and OtherNodeID. A tracking wrapper records
every volume, snapshot and publication the suite creates and tears them down in
dependency order, logging rather than failing so a teardown problem cannot mask
the assertion a subtest was making. Two new tests cover this by running the
whole suite twice against one shared provider instance, which passes only
because cleanup works, and once per prefix to cover concurrent runs sharing a
daemon.

TestLive_ViperblockdConformance wires this to a real cluster behind
SPINIFEX_VIPERBLOCK_LIVE, alongside the existing external NBD client suite.

* fix(viperblockd): close the four contract gaps the live conformance run found

Unpublishing a volume this node has no mount for now succeeds instead of
returning not_found, matching the legacy unmount path: nothing mounted here is
already the state the request asks for.

CreateSnapshot refuses a snapshot ID that already exists against a different
source volume with already_exists, rather than overwriting it.

DeleteVolume refuses a published volume with volume_in_use instead of tearing
the mount down, on this node or on whichever node answers the volume's owner
subject. The export and the guest writing through it survive the metadata
deletion, so the old behaviour surfaced later as corruption.

CreateVolume reads the source snapshot before writing the volume, returning
not_found when it is absent and invalid_argument when it was taken from a
different volume than the request names. Previously both produced a blank
volume and a successful response.

CopySnapshot classifies viperblock's foreign-volume refusal as invalid_argument
now that it carries a sentinel.

* feat(ebsprovider): pin the source snapshot's origin volume in the contract

The suite only required source_snapshot_volume_id to be present, so a caller
naming a volume the snapshot never came from was accepted everywhere. The
snapshot records its own origin, so this is checkable: creating from a snapshot
with a mismatched source volume is now invalid_argument for every provider,
enforced by qemunbdd against its snapshot metadata and by viperblockd against
the snapshot's persisted SourceVolumeName.

* test(ebsprovider): run the contract suite against viperblockd in CI

CI installed neither qemu nor nbdkit, so every conformance test that needs a
real implementation skipped silently and MemoryProvider was the only provider
the suite judged. CI now installs both, builds viperblock's nbdkit plugin, and
sets SPINIFEX_REQUIRE_CONFORMANCE_TOOLS so a runner image that loses them fails
instead of skipping.

TestViperblockdConformance stands the provider handlers up over an embedded
NATS and a real predastore and runs the same suite against them, which is what
caught CopySnapshot accepting a foreign volume's snapshot on unencrypted
volumes.

* feat(viperblockd): honour read-only publish and advertise block size constraints

ReadOnlyPublish was advertised false and read_only=true was rejected,
so the capability was true only by omission. nbdkit -r now starts the
export when the request asks for it, which sets the NBD read-only
transmission flag and makes the plugin refuse writes. Access mode is
fixed when nbdkit starts, so a republish asking for the other mode is
refused with VolumeInUse rather than handed the running export.

Block size constraints were absent entirely: the nbdkit Go binding has
no block-size callback, so the plugin cannot advertise them. The
blocksize-policy filter can, without a binding callback. Minimum 1
because viperblock's WriteAt handles unaligned requests with a
read-modify-write, preferred 4096 to match its block size, maximum 32M
to match what qemu-nbd advertises.

* test(conformance): judge sparse reporting by the allocation map, not the context

The subtest asserted that base:allocation was offered. nbdkit offers
that context whether or not the plugin can compute extents, answering
'all allocated' when it cannot, so the assertion passed for a server
with no extent support at all — it could not fail. What separates the
two is the answer: a volume with nothing written to it is entirely
holes to a server that really tracks allocation.

Read the map with nbdinfo --map --json and compare holes against the
advertised capability. qemunbdd reports holes and advertises true;
viperblockd reports none and advertises false.

* test(fixtures): keep SSL_CERT_FILE set for the fixture's whole lifetime

The predastore fixture is one daemon per test binary, but its cert was
exported with t.Setenv, which reverts when the first test that called
Start finishes. In-process clients did not notice because crypto/x509
caches the pool behind a sync.Once, loaded while the variable was still
set. Child processes did: nbdkit spawned by a later test inherited an
environment with no SSL_CERT_FILE and could not verify the daemon, so
the whole NBD client suite failed when the package ran as a whole while
passing when run alone.

Also install libnbd-bin in CI, so the NBD client suite runs there
instead of failing on missing tools.

* ci: install nbdkit-plugin-dev so the viperblock plugin can build

* test(volume): give the snapshot fixture an owner

CreateVolume now fails closed on a snapshot whose owner it cannot match,
including an unset owner_id. The fixture predates that and wrote none,
so the provider test failed with InvalidSnapshot.NotFound before ever
reaching the provider.

* test(integration): give the volume harness a real provider

The control plane no longer builds volumes itself, so CreateVolume in
the integration harness failed with "no EBS provider configured": the
harness wired a VolumeServiceImpl with nothing behind it. It now serves
viperblockd's provider subjects against the same predastore fixture, so
the blocks are still written by real viperblock to a real daemon.

Three persisted-state assertions moved with it. TenantID, VolumeType
and AvailabilityZone are control-plane facts, held in the ebsmetadata
document rather than viperblock's own state, so the storage oracle now
asserts their absence and DescribeVolumes -- whose answer is
account-scoped -- is what checks them.

* refactor: route image import through the EBS provider and drop the legacy metadata path

The control plane could still only run against viperblock: the AMI import and
the ochre weights import both linked the storage library directly, and the
ebsmetadata store kept a read fallback onto viperblock's config.json.

Import now goes through the provider contract with no new verb: CreateVolume,
PublishVolume, a bulk copy over the published NBD export with qemu-img, then
UnpublishVolume and CreateSnapshot. Bulk data rides NBD rather than NATS,
whose request size the contract caps far below a disk image.

The migration scaffolding goes with it. ebsmetadata documents are now the only
thing the control plane reads: no legacy prefix scan, no config.json fallback,
no backfill on daemon start. config.json belongs to the provider, which is the
single writer of it.

ListAMIs keeps its tolerant/strict split. Skipping an undecodable document is
right for DescribeImages, where one corrupt document must not hide the fleet,
and wrong for a name-uniqueness check, which cannot rule out a name it failed
to read.

spinifex and cmd no longer import viperblock outside services/viperblockd and
testutil/vbscan.

* feat: add a volume enumeration verb so a lost document cannot strand blocks

Making ebsmetadata documents the sole index of volumes left one failure with
no recovery: a volume whose document is gone disappears from DescribeVolumes,
from the leak reaper (which enumerates documents), and from the provider,
whose contract had no verb that asks what it holds.

ListVolumes closes that. It is capability-gated on VolumeEnumeration and
paginated, following CSI's optional LIST_VOLUMES rather than inventing a
shape. Refs are deliberately not Volumes: enumeration answers what exists,
and a provider must not open every volume's engine to say so.

Each implementation reads what actually exists rather than what it remembers.
qemunbdd walks its volumes directory, not its in-memory map, which does not
survive a restart; viperblockd walks the bucket's top-level prefixes. A
volume the provider has forgotten is precisely what a caller is looking for.

The consumer is a read-only orphan report: provider volumes minus documented
ones, exposed as spx admin volumes orphans. It never deletes. An EFI store is
excused only when its base volume is documented, so a stranded pair is still
reported. Listing documents stays strict, because reporting a volume as
orphaned on the strength of a document that failed to decode would point an
operator at live data.

* fix: stop the orphan scan accusing storage of holding things it does not

A live env19 run reported three orphans against a healthy cluster: an AMI's
backing volume, a snapshot, and the cluster key store. All three were wrong,
and a report that cries wolf on a clean cluster is worse than no report.

Enumeration treated every top-level bucket prefix as a volume. Snapshots sit
beside volumes at that level and have a config of their own, so presence of a
config cannot separate them; the snap- name is what does, which is already how
the AMI removal path reads them back. keys/ and spinifex/ are not volumes at
all.

An AMI's blocks are a genuine provider volume, so enumeration keeps reporting
them. What was missing is on the reading side: an AMI is recorded as an image
document, not a volume one, so the scan now treats a documented image as
known. Listing images is strict for the same reason listing volumes is —
unreadable and absent are different answers, and only one means orphaned.

* fix: let an orphaned image's blocks be reclaimed

The orphan report tells an operator that reclaiming a stranded volume is their
decision, and images remove --force is the tool it points them at. On env19
that tool failed on exactly those volumes: removal drops the ebsmetadata
document first, and predastore answers NoSuchKey for a document that is
already gone, which is the definition of an orphan.

Deleting the document stays first and stays fatal. That ordering is the
barrier that stops a launch landing on blocks about to be deleted, and an AMI
still advertised after its blocks are gone is the worse failure. Only an
already-absent document is now tolerated: the barrier is satisfied, and the
blocks are the sole thing left to reclaim.

S3ObjectStore.DeleteObject normalises a missing key the way GetObject already
does, so this is recognised rather than matched on error text.

The obvious unit test passed without the fix, because the in-memory store is
silently tolerant on delete and real S3 answers 204 — neither behaves like the
backend this runs against. The test now drives a store that reports the miss,
and fails without the fix.

* feat: add per-verb OTel spans to the EBS provider contract

The ten provider verbs cross a single NATS seam and nothing measured it.
The only spans on the storage path were the legacy ebs.mount/ebs.unmount
pair, so control-plane storage latency could not be attributed to a verb
or compared across provider implementations.

NATSProvider.request is the one client-side funnel every verb passes
through, including both legs of an owner-subject fallback, so a single
span there covers the whole contract and measures what the control plane
experiences regardless of which provider answers.

Span names come from a closed verb set rather than the subject. Owner
and snapshot-create subjects embed a volume ID and the mount/unmount
subjects embed a node ID; naming spans after them would give every
volume a span name of its own. The IDs move to attributes and an
unrecognised subject collapses to a single unknown verb.

Trace context rides the message headers, so the serving provider joins
the caller's trace instead of rooting one of its own. The carrier is a
copy of the one in spinifex/utils rather than an import: that package
pulls in the aws-sdk and the cluster key store, which the wire contract
must not depend on.

Responses carry no shared accessor for their error field, so both sides
re-read just that field from the encoded reply, and only when the span
is recording. Without it a failed verb looks like a successful round
trip.

viperblockd serves the contract with its own handlers rather than
natsserve, so its handlers now take the per-message context and its
publish/unpublish pair drops the subject-named consumer span it opened
for itself.

* feat: add null and hostile providers, and a per-verb bench suite

The provider boundary made it possible to put something other than
viperblock behind the control plane, and nothing yet did.

nullprovider is the floor. It is not a new type: MemoryProvider already
answers every verb from a map and natsserve already serves any
EBSProvider, so the package names that composition and states what it
measures. On loopback with no storage behind it a round trip costs
around 195us against 74ns in process, which is the seam's own price and
is not attributable to any storage engine.

conformance.RunBenchSuite prices one round trip per verb and drives
every implementation through the same calls in the same order, so two
providers' numbers are comparable. It measures control operations only:
guest I/O never crosses these verbs.

hostile wraps any provider in one that misbehaves. Faults derive from
the seed and a per-target sequence rather than a global counter, so
concurrent callers on different volumes cannot reorder each other's
faults and a failure found deep into a soak run replays exactly. Error
and error-after-work are separate faults on purpose: the second reports
failure after the work has already happened, which is how an orphan is
made, and is what makes an enumeration scan the right oracle for a soak.
Enumeration itself is never faulted, since an oracle that can be told
what to say cannot falsify anything.

The soak asserts that every volume the provider still holds is
attributable to an injected fault. A leftover with nothing behind it is
the control plane losing track of storage on its own.

Two bugs were found by falsifying the new tests rather than by running
them. The FNV-derived draw clustered badly enough that two fault bands
were never reachable in 1200 draws, so the draw now goes through a
SplitMix64 finalizer. And the first version of the lie test was
worthless: MemoryProvider returns copies, so a lie could not corrupt it
whether or not the injector copied, and the test now drives a provider
that hands out pointers into its own state.

* test: bench the provider contract against qemunbdd and a live viperblockd

RunBenchSuite was only ever pointed at the null provider, so the numbers
priced the seam and nothing else. Point it at the two real implementations.

BenchConfig gains a VolumeBytes knob: 1 GiB per iteration is fine against a
provider that stores nothing and wrong against one that does, so qemunbdd and
viperblockd are both measured at 64 MiB.

liveProvider splits into a testing.TB flavour. Benchmarks need the same
connection and the same node and cannot be handed a *testing.T.

* fix(viperblockd): carry the trace context into every viperblock engine call

Both S3 clients only emit a span when the request already carries one, so
calling the no-context Init, LoadState, SaveState, LoadBlockState and Close
left the whole engine open untraceable. Every provider verb traced as one flat
server span, and the 342ms describe measured on env19 could not be attributed
to anything.

viperblock already exposes the Ctx variants and Backend already declares
InitCtx, so this is threading, not new instrumentation. openVolumeVB,
openLoadedVolumeVB, sealVolumeVB, describeVolumeEngine, snapshotVolumeEngine,
copySnapshotOnVolume, seedVolume and applyConfigUpdate now take a context, and
mount/unmount keep the context their own span derives instead of dropping it.

completeCreateSnapshot gets WithoutCancel: the background half of
accept-then-publish has to outlive the request it was accepted by and still be
attributable to it.

The per-volume ebs.config handler opens a consumer span like the other legacy
subjects, so a config update is no longer the one path with no trace at all.

* perf: describe a volume without opening an engine on it

describeVolumeEngine fell through to openVolumeVB for any volume not mounted
on the node serving the request, which constructed a full viperblock engine
to read one integer. On env19 that decomposed as a 22 ms reachability list, a
3 ms state read and a 16 ms PutObject of the volume's own config.json — the
write coming from the SeqNum bootstrap a read-write open performs.

Use viperblock's read-only state load instead. A describe is now the 3 ms
read: no background goroutines, no reachability probe, no SeqNum window
claimed, and no write issued by a worker that does not own the volume.

Falsified: restoring the openVolumeVB call fails
TestDescribeVolume_ReadsWithoutOpeningTheVolume on both the write and the
list, with the fake backend answering each so neither assertion hides behind
the other.

* perf: share one HTTP client across every viperblock backend

Four sites built the same S3Config by hand, each leaving HTTPClient unset, so
every engine open and state read got its own connection pool and paid its own
TLS handshake. That was invisible while Backend.Init issued a whole-bucket
list — the list paid for the connection and the state read rode it — and it
became the dominant cost once describe was reduced to a single request.

Route all four through cfg.volumeS3Config, which builds the client once.

Falsified: dropping the HTTPClient field takes
TestDescribeVolume_ReusesOneConnection from one connection to three.

* perf: wait for nbdkit to be ready instead of waiting a fixed second

mountVolume spawned nbdkit and then ran a confirm loop until a one-second
deadline passed. The loop only broke early when the process exited, so the
fast-failure path worked and the success path always cost the full second.
That second was ~1015 ms of a ~1040 ms publish, and it emitted no spans, so
the timings never contradicted the assumption that it was process spawn.

Wait for the endpoint to accept a connection instead. That is also the
question the caller needs answered, since it is about to hand the URI to
something that will connect to it — where 'still alive after a second' only
correlates with it. A nbdkit that exits during startup still fails the mount
immediately, and one that never comes up now fails on a deadline rather than
being assumed healthy.

Falsified: reintroducing a fixed sleep in pollUntil fails both the readiness
timing assertion and the fast-failure one.

* test: measure the data path, not just the control verbs

The conformance benchmarks price create, publish and describe. Guest
I/O never crosses those verbs, so none of those numbers say anything
about what a guest experiences. This drives the published export with
qemu-img bench, which sits on the same block layer virtio-blk does.

It asserts only that the I/O completes and logs a table: what a given
store is capable of is not a contract, and pinning a number here would
only produce a flaky test.

Read profiles stay inside the region the write profiles covered, or
they would be timing how fast the export answers with zeroes, and one
write profile flushes, because an unflushed write measures how fast the
WAL accepts data rather than how fast the store takes it.

Profiles are spaced apart because the plugin tears an engine down per
disconnect and removes the volume's local directory as it goes, so a
connection opened while the previous one is closing fails its
handshake.

* test: run data-path profiles back to back

The spacing was a workaround for a volume lock that did not hold across
close. With that fixed, consecutive profiles are worth more than the
workaround was: each is its own NBD connection, so a run that completes
has also shown that an arriving connection waits out the previous one's
close rather than racing it.

* fix: refuse a delete that cannot establish whether a volume is published

volumeMountedElsewhere returned false on every failure path, including a
request timeout, so a busy or partitioned owner was indistinguishable
from no owner at all and the delete proceeded. Deleting a published
volume leaves the nbdkit export and the guest writing through it alive
over storage that is going away.

Report the three outcomes separately. NATS distinguishes no-responders
from no-answer, so only the former means unmounted; an unanswered probe
is refused and the caller may retry once the owner is reachable.

* feat: exclude a second viperblock engine with a JetStream volume lease

Nothing in the stack stopped two viperblock engines opening one volume from
different nodes. For an encrypted volume that is not just a consistency risk:
the AES-GCM nonce is fully consumed by SeqNum, VolumeUUID and a domain byte,
and the SeqNum window claim is a read-then-write with no CAS, so two engines
opening concurrently issue overlapping nonces under the same key.

Every engine open now takes a lease first, keyed by volume in a JetStream KV
bucket. A lease is a KV create, which JetStream serialises, so a second
claimant loses instead of both winning. The revision that won is the
generation: monotonic across the bucket, so a later opener always carries a
higher one than the writer it displaced. Entries carry a TTL and a renewal
loop, so a node that dies mid-mount does not wedge its volumes forever.

Losing a lease is logged, not enforced. Until the object store can refuse a
stale writer's PUT, failing live guest I/O on lease loss would add a failure
mode without stopping the zombie it is aimed at.

A daemon with no lease store refuses to open rather than opening blind, so
nbdkit recovery binds the store before it adopts surviving exports. Repeat
acquisitions on one node share a lease: the unmount seal opens a detached
engine while the mount being torn down still holds it, and cross-node
exclusion is what the lease is for. A restart reclaims this node's own stale
entries, since the exports that outlived the daemon are still running.

* refactor: consume masterkey from bluebottle in the test this branch added

* feat(ebsprovider): classify refusals a caller may retry

Every ErrorCode said what went wrong and none said whether the same
request could succeed later, so a caller could not tell a permanent
refusal from a transient one. Transient conditions shipped as internal,
which tells a caller to give up when it should retry.

Adds ErrUnavailable / ErrorCodeUnavailable and ErrorCode.Retryable(),
which callers branch on instead of on the code itself. DeleteVolume's
"could not establish whether the volume is published" refusal moves off
internal onto it: the owner that did not answer may answer later.

TestErrorCodeRetryable names every code, so adding one without deciding
its retry meaning fails rather than silently defaulting to permanent.
TestClassifyError pins the sentinel-to-wire-code mapping, which had no
coverage at all; a sentinel missing from classifyError falls through to
internal and loses both the reason and the retry signal.

* fix(ebsprovider): drop CopyOnWriteClone, which no request can ask for

Four providers advertised the capability and nothing consumed it: there
is no clone verb on the interface. CreateVolume's SourceSnapshotID
restores from a snapshot and CopySnapshot duplicates snapshot metadata;
neither is a volume clone, and the field documenting SourceSnapshotID
says so explicitly. CSI expresses clone as a volume_content_source with
a volume source, which this contract does not implement.

Advertising it told a caller a feature was available and then gave them
no way to use it. Removed rather than backed by a method: adding a clone
verb is a feature, not a contract fix, and the capability can come back
alongside it. The Capabilities doc comment now states the rule, and
qemunbdd's stale comment about sparse extents is corrected while there.

* feat(ebsprovider): add ListSnapshots so snapshots are reconcilable

The contract could create, copy and delete snapshots but never say which
ones it held. That left the control-plane metadata document as the only
index of them, so losing one stranded the data it pointed at with no way
to find it again. This is the same exposure ListVolumes closed for
volumes, and it stayed invisible because ListSnapshots is optional in
CSI too.

ListSnapshots pages exactly as ListVolumes does, gated on a new
SnapshotEnumeration capability. SnapshotRef is deliberately not a
Snapshot: enumeration answers what exists, and reading a snapshot's size
or state can cost far more than listing it.

viperblockd walks the bucket's snap- prefixes, sharing the top-level
walk with ListVolumes. It leaves SourceVolumeID empty because the link
lives inside the snapshot's own encrypted state and reading it would
mean a fetch per snapshot listed. qemunbdd walks its snapshots
directory rather than its in-memory map, so a snapshot that outlived the
process still appears; its SourceVolumeID is empty in that case for the
same reason CreateSnapshot refuses to reuse the ID.

Five conformance subtests cover it, and they run green against
MemoryProvider, qemunbdd and viperblockd over a real predastore.

* feat(ebsprovider): state the exclusion guarantee in the contract

A caller could not tell which providers prevent two writers from holding
one volume, at what scope, or for how long. The guarantee existed in
viperblockd and was invisible from the outside, which is why the
conformance suite had no concurrency dimension at all.

Capabilities.Exclusion states it, and deliberately separates three
questions the contract used to run together: how far exclusion reaches
(none, node, cluster), whether a dead owner's claim ever expires, and
whether a writer that lost its claim is actually stopped. That last one
matters most and is the least flattering: exclusion refuses the second
opener, fencing stops the first. viperblockd advertises cluster scope
with a 45s TTL and FencesLostClaim false, because a partitioned node
whose lease lapsed keeps writing until the object store can refuse it.

Four new conformance subtests. Two required a second viperblockd node in
the harness: cluster exclusion cannot be exercised by one node, because
the second publish goes to a subject nobody serves and times out rather
than being refused. Both nodes share the NATS the leases live in and the
bucket the volumes live in, so a refusal comes from the lease.

Standing that second node up immediately found a real gap, in a test
that had been silently skipping for want of one. A publish refused by
another node's lease came back as internal rather than volume_in_use, so
a caller was told something had broken when the answer was that someone
else held the volume. Mapped in handlePublishVolume.

* build: pin viperblock to the release carrying the provider's dependencies

The branch has been building against a local replace pointing at a
viperblock worktree, so its committed pin never actually built: it named
a version without CopySnapshotMeta, ErrSnapshotVolumeMismatch,
NewStateReader or s3.NewHTTPClient, all of which this branch calls.

Points at the merged viperblock dev instead and drops the replace.
GOWORK=off now builds clean, which is the deploy path ansible uses.

* fix: let viperblockd's delete sweep tolerate an object another sweep removed

deleteObjectPrefix claimed to mirror handlers/ec2/volume's deleteS3Prefix and
give DeleteVolume and DeleteSnapshot idempotent-when-absent behaviour, but it
returned on any DeleteObject error. Two overlapping deletes for one volume left
the loser reporting an internal failure once the winner had removed a chunk
between the list and the delete.

The control-plane copy that carried this fix is gone with the embedded engine
path, so the provider path reintroduced the bug it had just fixed.

* fix: stop CreateVolume leaving local state on whichever node served it

A state read prefers this node's local copy over the backend, and provider RPCs
are not owner-routed, so the node that happened to serve a create kept a copy
that answered describe as if the volume still existed after another node
deleted it. The two-node conformance harness caught it as DeleteVolume/success
failing about one run in three.

The seeded path already removed its local files after closing. The unseeded
path saved state and left them, which was the only difference between the two.

* fix: guard the mount path itself against a second export of one volume

handlePublishVolume refused a volume this node already exported, but
mountVolume did not, and the legacy ebs.<node>.mount subject is the route
production takes for instance launch and hot-attach. A retried attach racing a
fresh one started two real nbdkit against one volume, with no refusal and no
warning: the volume lease only refuses a different node, and a same-node
re-acquire finds the volume already held and increments its refcount.

That also made the advertised exclusion inaccurate. viperblockd claims
cluster-scoped exclusion on the grounds that a second opener is refused, while
the conformance subtests reach it only through PublishVolume, so they passed
with the legacy route unguarded. Moving the check into mountVolume gives both
entry points the same behaviour and makes the claim true for the path
production uses.

* fix: tolerate a missing legacy AMI config on deregister

DeregisterImage deletes the AMI document, then the pre-provider
{imageID}/config.json. Predastore answers a delete of an absent key with
NoSuchKey, and that was treated as fatal, so every AMI created since the
metadata store landed failed to deregister after its document was already
gone. A retrying caller then saw InvalidAMIID.NotFound for an image it had
just been told it could not delete.

The regression test uses a store that answers a missing-key delete the way
Predastore does; MemoryObjectStore silently succeeds, which is why the unit
suite stayed green.

* fix: reap ENIs left behind by an abandoned instance launch

A launch creates the instance's ENI and then attaches it. When the daemon
dies in between, the record survives with no instance and nothing ever looks
at it again. The security group dependency check counts an ENI that lists the
group, so the group cannot be deleted for as long as the record exists.

The in-process launch path already rolls back on error; a process that dies
cannot. This adds a cluster-wide sweep over records that are launch-created,
never attached, and older than the launch RPC timeout by a wide margin. The
description prefix is now a shared constant because it is the only thing
separating an abandoned launch from a standalone ENI a caller asked for.
2026-08-12 16:54:19 +10:00
Julian Sommer 8f930e6275 refactor: consume the shared packages from bluebottle
Takes iampolicy, masterkey and sigv4 from github.com/mulgadc/bluebottle rather
than predastore, so the control plane no longer depends on the S3 server for
shared auth and policy code.
2026-08-12 10:50:48 +10:00
brynmailer-mdc a7a62addeb test: rebuild the predastore fixture and service tests on the facade
The fixture wrote a config the strict decoder rejects and built its cluster
through clusterrun, so it now renders a v1 TOML, loads it through LoadConfig and
serves under Run. Loading the real file means the fixture trips over the same
validation an install does. Its data directory holds node-<id> directly, and it
drains on cancellation rather than being abandoned at exit.

The runtime tests drove buildRuntime, serve and the old on-disk layout, all of
which predastore owns now, so they go. What replaces them covers what spinifex
still decides: the flag merge and its precedence, a host id or gate node the
config does not have, and the pid file behind Stop and Status.

Two fixes to earlier commits in this series: the host id conversion moves behind
its own guard, and the node status probes use WaitGroup.Go.
2026-08-11 17:23:42 +10:00
Josh Siviour 0a1d837f40 feat(bedrock): gate Ochre models behind per-account access grants (#741)
* feat(bedrock): gate Ochre models behind per-account access grants

Self-host models were invokable by any authenticated account: tieredCatalog
returned them unconditionally and no runtime router checked the caller.
GetFoundationModel also described models the caller could not use.

Add a bedrock-model-access JetStream KV bucket holding presence-only grants,
resolved through a new AccessResolver. Access is deny-by-default: a gateway
with no store configured falls back to DenyAllAccessResolver, so an
unconfigured deployment serves nothing rather than everything. The system
account bypasses grants, matching how quotas exempt it.

All four runtime routers share one grantedCatalogEntry gate so they cannot
drift on who may invoke what. List and describe agree: an ungranted model is
absent from ListFoundationModels and reported as ResourceNotFoundException by
GetFoundationModel, so the error cannot confirm a model exists.

Administration lands on two surfaces: Grant/Revoke/ListModelAccess actions on
the spinifex gateway service for the UI, and `spx admin ochre access` for
operators and provisioning, which opens the bucket over NATS directly rather
than requiring a SigV4 client the CLI does not have.

* feat(bedrock): seed the admin account's model grants at gateway start

Deny-by-default left a fresh install with a catalog nobody could see, and the
first cut filled that gap from ansible — which is a dev tool, so any install
that never ran it came up unusable.

Seed from the product instead: on start awsgw grants the platform admin
account the full catalog, once, behind a marker key in the same bucket. The
marker makes it a bootstrap step rather than a policy: tenant accounts still
begin with no access, and an operator who revokes a grant does not have it
restored by the next restart. Grants are written before the marker so a crash
midway repeats the idempotent grants rather than leaving a half-seeded
account, and the marker is a conditional create so only the first node to
reach it need win.

Seeding is best-effort: a KV failure logs and leaves the gateway serving,
and the next start retries because the marker is written only on success.

* test(bedrock): cover the model-access CLI and gateway admin actions

Route the access CLI runners through the same loadConfigAndConnectFn /
ochreExit seam the weights runners use, so grant, revoke and list can be
driven against an embedded JetStream server, and add gateway tests for the
grant admin actions including the non-admin denial.
2026-08-06 16:17:10 +10:00
Julian Sommer 1c4d41bffc fix: reach the DB endpoint from any subnet of the VPC (#738) 2026-08-06 13:56:03 +10:00
Julian Sommer 8c07f80032 chore: remove the half line breaks 2026-08-06 11:10:15 +10:00
Josh Siviour 688ce5ccfd feat: add AWS model conformance coverage (#736) 2026-08-05 18:46:37 +10:00
Julian Sommer 2a79bc8473 fix: record RDS instance creation events (#734) 2026-08-05 15:17:06 +10:00
Julian Sommer f7d5d97e3f fix: propagate RDS parameter group edits (#733) 2026-08-05 15:08:14 +10:00
Julian Sommer 68671cdf19 fix: prevent parameter groups bricking RDS instances (#731) 2026-08-05 14:16:31 +10:00
Julian Sommer f240c33778 fix: wait for postgres to be up before running tofu workbook e2e 2026-08-05 11:48:58 +10:00
Julian Sommer 710169e5a6 fix: eliminate RDS Terraform drift (#729) 2026-08-05 10:34:51 +10:00