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Anso
f3757b43c6
A replica now binds to the first control that pushes to it. Subsequent
pushes from a different control are rejected with 409
CONTROL_IDENTITY_MISMATCH until an admin explicitly reanchors. Closes
the cross-control hijack window where any node_proxy bearer signed
against the replica's secret could overwrite security policies.
Wire protocol:
- Sender includes a stable 16-hex-char `controlIdentity` derived by
SHA-256-truncating `system_state.instance_id` (the local UUID written
once by LicenseService.initialize on first boot). Hostname rotations
do not flag drift; only a SQLite reset or explicit reanchor breaks
the binding.
- Receiver caches the fingerprint inside the same transaction that
applies the row replacement and watermark write. Three states:
null (fresh install), '' (post-reanchor), '<fingerprint>' (anchored).
- Empty `controlIdentity` is treated as legacy and accepted, so older
controls keep working during rollout.
New endpoint:
- POST /api/fleet/role/reanchor (admin, requires `{override: true}`):
clears the cached fingerprint, both `received_pushed_at:*` watermarks,
and replicated rows of both resources, all in one transaction. The
static cached fingerprint is also flushed defensively.
Public surface additions:
- `FleetSyncService.getControlIdentity()`: stable fingerprint for the
outgoing push body.
- `FleetSyncService.reanchor()`: admin-driven anchor reset.
- `ControlIdentityMismatchError`: typed sentinel the route translates
to 409 with structured body `{error, code, expected, got}`.
Tests:
- 9 new vitest cases covering first-sync persistence, mismatch
rejection, matching acceptance, empty-incoming back-compat,
post-reanchor un-anchored state, fingerprint stability, missing
instance_id fallback, route-level mismatch, route-level reanchor
with override gating.
- One ordered route-level scenario instead of cross-dependent it()
blocks so test reordering cannot silently break the suite.
- Full backend suite: 1769 pass / 5 skipped.