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ci(e2e): run distributed e2e on ubuntu-latest

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sm-standard-4 ARC pods reject both loop mounts (ENOENT) and tmpfs
("cannot mount tmpfs read-only"). GitHub-hosted ubuntu-latest is a
VM, the same class that already runs the io_uring loopback and
e2e-s3tests lanes.

Co-authored-by: RustFS <hello@rustfs.com>
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Cursor Agent
2026-09-06 03:42:39 +00:00
parent 282d6d5efe
commit 6a892f7d48
2 changed files with 22 additions and 12 deletions
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docs/testing/distributed-e2e.md
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@@ -17,7 +17,7 @@ A multi-pool layout in which any pool spans several localhost ports is not expre
Data-movement cases fail closed. A decommission or rebalance test must observe a successful start response, an active state, a clean terminal state, non-zero movement counters, and post-operation object integrity. An unsupported response, HTTP 5xx, missing status fields, cleanup warning, or zero-progress terminal response fails the case; pre/post S3 availability alone is not evidence that movement ran.
The four expansion pools must report independent capacity. Four directories on one runner filesystem all return the same `statfs` totals, so RustFS correctly concludes that no pool is less free than the cluster average and performs no rebalance. The Actions job mounts four isolated 1 GiB tmpfs filesystems and exports their absolute paths through `RUSTFS_E2E_POOL_ROOTS`. It does not use ext4 loop devices: the `sm-standard-4` ARC pods have no `/dev/loop-control`, so `mount -o loop` fails with `No such file or directory`. Sized tmpfs still reports a distinct `st_dev` and independent 1 GiB `statfs` capacity. The harness rejects missing, duplicate, relative, nonexistent, or same-device roots instead of allowing a vacuous movement pass. Planned pool additions stop every process with SIGTERM; hard process termination remains a chaos-only fault. After the fourth pool joins, the harness performs one full graceful persistent restart: this proves the expanded pool map survives restart and ensures movement begins only after every replica can load the converged metadata.
The four expansion pools must report independent capacity. Four directories on one runner filesystem all return the same `statfs` totals, so RustFS correctly concludes that no pool is less free than the cluster average and performs no rebalance. The Actions job runs on GitHub-hosted `ubuntu-latest` and mounts four isolated 1 GiB tmpfs filesystems, then exports their absolute paths through `RUSTFS_E2E_POOL_ROOTS`. It does not use the self-hosted `sm-standard-4` ARC pods: those cannot create filesystems (`mount -o loop` fails with `No such file or directory`, and `mount -t tmpfs` fails with `cannot mount tmpfs read-only`). Sized tmpfs still reports a distinct `st_dev` and independent 1 GiB `statfs` capacity. The harness rejects missing, duplicate, relative, nonexistent, or same-device roots instead of allowing a vacuous movement pass. Planned pool additions stop every process with SIGTERM; hard process termination remains a chaos-only fault. After the fourth pool joins, the harness performs one full graceful persistent restart: this proves the expanded pool map survives restart and ensures movement begins only after every replica can load the converged metadata.
The expansion fixture is an all-current-binary fleet, so it initializes pool metadata with the documented V3 write and fleet-confirmation gates. Decommission cases write their baseline objects, version history, and multipart data into pool 0 before adding pools 1–3, then retire pool 0. This makes a passing result evidence of user-data movement rather than merely an internal-metadata counter changing.