MinAgent: 0.105.0. scheduledRunAllowed fired on any nil age; it now requires a
licence from valveLicensed, which grants it for AgeStateAbsent and for a LEGACY
agent, and refuses it for AgeStateUnknown. An unreadable storage no longer
masquerades as a first-ever backup and no longer quiesces apps outside the window.
A missing wire field means legacy, not unknown — deliberately. Treating it as
unknown would stop the valve firing on un-upgraded boxes and starve genuinely new
ones. Degrade logged once; unrecognised future values also map to legacy.
Caught in passing: TieredBackend is satisfied by a RUNTIME assertion, so the
signature change compiled and vetted clean while quiesceBackend silently stopped
satisfying it — which would have degraded every box to the single-tier path with
no error. Added a compile-time witness.
Also corrects the notifier comment that claimed operator-only came from a missing
customerMessages entry; enforcement is hub-side operatorOnlyEvents (hub 0.79.0).
MinAgent UNCHANGED — degrades gracefully against ANY older agent.
The agent gained per-target tiers in v0.97.0. The controller owns quiescing,
so the multi-tier schedule is reconciled here: every due tier is collected up
front and run inside ONE quiesce window (one stop, N sequential backups, one
resume). Two cycles on the weekly night would mean two app outages for one
night's work.
Dedup rule: local-only -> one quiesce; PBS-only -> one quiesce; BOTH due ->
ONE window with both backups inside; neither -> no quiesce.
- quiesce.TieredBackend + BackupTier + ErrTiersUnsupported (optional extension)
- agentapi: BackupTiers/BackupDueFor/StartBackupFor/BackupStatusFor;
targetQuery("") yields an EMPTY suffix so untargeted hits the pre-R-82 route
byte-for-byte
- Loop.resolveDueTiers = the dedup rule in one place, agent order preserved
- quiesceAndPollTiers + pollTier: app stays quiesced until the LAST tier
snapshots (resuming earlier loses app-consistency on the DR tier). Consequence
stated in the docs: both-due-night downtime = first tier's full backup + last
tier's snapshot, which is why tiers run fast-first.
- Manual 'Mentes most' covers EVERY tier, due-ness ignored.
- Window-gate safety valve now uses the OLDEST due tier, so a stale DR tier
cannot be starved by a fresher local one.
Capability detection: /backup/tiers 404 = pre-R-82 agent (the documented
route-probe mechanism). Not a featureProbes row on purpose — the loop needs the
tier LIST, not a yes/no. Degrade logged exactly once per process.
Tests +11, full suite green. Red-proofs #2 and #3 observed and restored.
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