Files
minio/cmd
Feng Ruohang b10fd0e9c0 fix(ilm): report refused purges of all versions, and account their keys
An expiry of all versions of a key purges exactly that key, and the
purge can refuse it or stop early. Those outcomes were hard to see, and
the scanner reported a key it had queued as if it were already gone.

- Refusals and failures of a purge are counted in
  expiry_incomplete_total with their own reasons: tier_unsupported (a
  version is in a remote tier), budget (stopped after progress; the next
  expiry continues), changed (the latest version a batch matched
  changed) and history_unavailable. They are traced with the reason and
  send no removal event. A partial purge keeps its audit record, now
  with the reason. A tier refusal is also logged, once per key and hour,
  in words.
- A drive that cannot be read or decoded during the purge's own drive
  check now returns errDeleteAllHistoryUnavailable, which names the
  cause and stays a write quorum error (503) for API callers.
- The scanner does not queue an expiry of all versions whose latest
  version is hot when the pool holds a version in a remote tier: the
  purge would refuse it each cycle. It counts each such observation as
  tier_unsupported_skipped, once per drive scanner and cycle. A tiered
  version only another pool holds is unknown here, so the purge still
  decides; a transitioned latest version keeps the transitioned expiry.
  The tier predicate is shared with the purge's own check, for FileInfo
  and ObjectInfo, and excludes free versions.
- The scanner accounts every version of a key under an expiry of all
  versions at its size, queued or not, instead of as already removed.
  Usage, and so hard quota, drops after a fresh scan of the subtree once
  the purge succeeded. The alerts on many or large versions count the
  versions of a key that is not queued.
- A lifecycle expiry never deletes a prefix: DeleteObject refuses
  DeletePrefix with Expiration.Expire as InvalidArgument. No caller
  sends it since expiries of all versions became purges; a force delete
  of a prefix is unchanged.

Not done from the plan: queuing an MRF heal per version when a drive's
xl.meta fails to decode. Object heal does not rewrite metadata that
fails its CRC check (it reports the drive as unknown and skips it), so
those heals would not repair the drive. Such a key stays refused until
its metadata on that drive is repaired.

Tests: TestPurgeAllVersionsRefusalReasons,
TestPurgeAllVersionsRefusesCorruptDrive,
TestScannerSkipsDeleteAllForTieredKey and
TestPoolsDeleteObjectRejectsExpirePrefix are new. Tests that expected
the scanner to queue a refused purge, the predictive accounting, or
the old prefix options are converted.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Feng Ruohang <rh@vonng.com>
2026-11-06 19:59:42 +08:00
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