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ops: Signal disk-full and eviction capacity pressure #46

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linus merged 3 commits from ops-disk-full-eviction-signal into develop 2026-09-08 13:20:23 -05:00
Conversation 2 Commits 3 Files Changed 12
+501 -83

3 Commits

Author SHA1 Message Date
ash e3b2b8de1e test: Hold disk init in DiskOnlyDelayedAttach too
CI / vulncheck (pull_request) Successful in 15s
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CI / check-and-test (pull_request) Successful in 42s
Details 
Empty-dir attach can finish before the pending DiskTierReady
assertion under CI load, same race MixedPendingReady already
fixed with RegisterInitHold. Drop t.Parallel and hold the
barrier through the pending checks so disk-only stays green.

Link: #36
 2026-09-08 18:16:18 +00:00
ash fe04fb9fbb vfs/disk: Harden pending-window test against empty-dir race 
Empty-dir disk init closes initDone almost immediately, so
TestDiskTierSignalMixedPendingReady can observe DiskTierReady=0 then
a heartbeat that already saw ready. Register a per-root init hold so
the test can keep the pending window open without slowing production.

Link: #36
 2026-09-08 18:16:18 +00:00
ash de43a71929 ops: Signal disk-full and eviction capacity pressure 
When the disk (or memory) tier is at cap or the volume returns ENOSPC,
ops currently look like random misses with no clear "we are dropping
data." Count those events as capacity_pressure_events on /metrics and
log tier plus reason so operators can tell capacity pressure from a
cold cache, without changing the existing evictions counter.

Link: #36
 2026-09-08 18:15:51 +00:00