feat(observability): event triggers + log scanner backend
Two paired backends sharing the events.Bus seam:
Event triggers (consumer-side):
- internal/store/event_triggers.go — CRUD with action_secret
redaction on read (placeholder echo treated as "no change" on
PATCH so secrets aren't accidentally wiped).
- internal/events/dispatcher.go — bus subscriber, AND-composed
filters (severity CSV, source CSV, message regex with memoized
compile cache). Structural loop-prevention: never writes to
event_log. Sends via notifier.SendPayload.
- internal/notify: SendPayload + SendSyncForTestPayload methods,
TierEventTrigger constant, doSendRaw shared with the legacy
Event-shaped path.
- internal/api/event_triggers.go — admin-gated CRUD + /test
sending the real TriggerWebhookPayload shape. SSRF guard
rejects loopback / link-local / unspecified targets. PATCH
uses pointer-typed DTO for partial updates.
Log scanner (producer-side):
- internal/logscanner/ — engine (per-rule cooldown +
per-container token bucket, atomic drop counters), tail
(multiplexed docker frame demuxer with TTY fallback + 16 MiB
payload cap + 1 MiB reassembly cap + RFC3339Nano-validated
timestamp strip + UTF-8-safe message truncation), manager
(5s container polling, atomic.Pointer[Snapshot] hot-reload,
HitEmitter writes event_log + publishes EventLog so the
trigger dispatcher picks them up immediately).
- internal/docker/container.go — ContainerLogsOpts exposes
stream selection for stderr-only / stdout-only rules.
- internal/store: log_scan_rules table + CRUD with
EffectiveLogScanRules resolver (globals minus per-workload
overrides plus workload-only additions). Transactional
cascade-delete of overrides when a global rule is removed.
- internal/api/log_scan_rules.go — admin-gated CRUD + /test
(sample_line → matched/captures) + /stats (drop counters +
active tail count + last-snapshot compile errors) +
GET /api/workloads/{id}/effective-rules.
cmd/server/main.go wires both subsystems next to the existing
RegisterPersistentLogger. Coverage spans engine cooldown / bucket
counter tests, snapshot effective-set semantics, manager compile-
error capture, dispatcher matching, store validation +
cascade-delete, API URL validator + secret redaction.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
alexei.dolgolyov
7a9ff7ad54