d248cba77f
Tasks completed: 3/3 - Deploy TaskPlanner with ServiceMonitor and verify Prometheus scraping - Verify critical alert rules exist - Human verification checkpoint (all OBS requirements verified) Deviation: Fixed Loki datasource conflict (isDefault collision with Prometheus) SUMMARY: .planning/phases/08-observability-stack/08-03-SUMMARY.md
127 lines
4.4 KiB
Markdown
127 lines
4.4 KiB
Markdown
---
|
|
phase: 08-observability-stack
|
|
plan: 03
|
|
subsystem: infra
|
|
tags: [prometheus, grafana, loki, alertmanager, servicemonitor, observability, kubernetes]
|
|
|
|
# Dependency graph
|
|
requires:
|
|
- phase: 08-01
|
|
provides: TaskPlanner /metrics endpoint and ServiceMonitor
|
|
- phase: 08-02
|
|
provides: Grafana Alloy for log collection
|
|
provides:
|
|
- End-to-end verified observability stack
|
|
- Prometheus scraping TaskPlanner metrics
|
|
- Loki log queries verified in Grafana
|
|
- Alerting rules confirmed (KubePodCrashLooping)
|
|
affects: [operations, future-monitoring, troubleshooting]
|
|
|
|
# Tech tracking
|
|
tech-stack:
|
|
added: []
|
|
patterns: [datasource-conflict-resolution]
|
|
|
|
key-files:
|
|
created: []
|
|
modified:
|
|
- loki-stack ConfigMap (isDefault fix)
|
|
|
|
key-decisions:
|
|
- "Loki datasource isDefault must be false when Prometheus is default datasource"
|
|
|
|
patterns-established:
|
|
- "Datasource conflict: Only one Grafana datasource can have isDefault: true"
|
|
|
|
# Metrics
|
|
duration: 6min
|
|
completed: 2026-02-03
|
|
---
|
|
|
|
# Phase 8 Plan 03: Observability Verification Summary
|
|
|
|
**End-to-end observability verified: Prometheus scraping TaskPlanner metrics, Loki log queries working, dashboards operational**
|
|
|
|
## Performance
|
|
|
|
- **Duration:** 6 min
|
|
- **Started:** 2026-02-03T21:38:00Z (approximate)
|
|
- **Completed:** 2026-02-03T21:44:08Z
|
|
- **Tasks:** 3 (2 auto, 1 checkpoint)
|
|
- **Files modified:** 1 (loki-stack ConfigMap patch)
|
|
|
|
## Accomplishments
|
|
|
|
- ServiceMonitor deployed and Prometheus scraping TaskPlanner /metrics endpoint
|
|
- KubePodCrashLooping alert rule confirmed present in kube-prometheus-stack
|
|
- Alertmanager running and responsive
|
|
- Human verified: Grafana TLS working, dashboards showing metrics, Loki log queries returning TaskPlanner logs
|
|
|
|
## Task Commits
|
|
|
|
Each task was committed atomically:
|
|
|
|
1. **Task 1: Deploy TaskPlanner with ServiceMonitor and verify Prometheus scraping** - `91f91a3` (fix: add release label for Prometheus discovery)
|
|
2. **Task 2: Verify critical alert rules exist** - no code changes (verification only)
|
|
3. **Task 3: Human verification checkpoint** - user verified
|
|
|
|
**Plan metadata:** pending
|
|
|
|
## Files Created/Modified
|
|
|
|
- `loki-stack ConfigMap` (in-cluster) - Patched isDefault from true to false to resolve datasource conflict
|
|
|
|
## Decisions Made
|
|
|
|
- Added `release: kube-prometheus-stack` label to ServiceMonitor to match Prometheus Operator's serviceMonitorSelector
|
|
- Patched Loki datasource isDefault to false to allow Prometheus as default (Grafana only supports one default)
|
|
|
|
## Deviations from Plan
|
|
|
|
### Auto-fixed Issues
|
|
|
|
**1. [Rule 1 - Bug] Fixed Loki datasource conflict causing Grafana crash**
|
|
- **Found during:** Task 1 (verifying Grafana accessibility)
|
|
- **Issue:** Both Prometheus and Loki datasources had `isDefault: true`, causing Grafana to crash with "multiple default datasources" error. User couldn't see any datasources.
|
|
- **Fix:** Patched loki-stack ConfigMap to set `isDefault: false` for Loki datasource
|
|
- **Command:** `kubectl patch configmap loki-stack-datasource -n monitoring --type merge -p '{"data":{"loki-stack-datasource.yaml":"...isDefault: false..."}}'`
|
|
- **Verification:** Grafana restarted, both datasources now visible and queryable
|
|
- **Committed in:** N/A (in-cluster configuration, not git-tracked)
|
|
|
|
---
|
|
|
|
**Total deviations:** 1 auto-fixed (1 bug)
|
|
**Impact on plan:** Essential fix for Grafana usability. No scope creep.
|
|
|
|
## Issues Encountered
|
|
|
|
- ServiceMonitor initially not discovered by Prometheus - resolved by adding `release: kube-prometheus-stack` label to match selector
|
|
- Grafana crashing on startup due to datasource conflict - resolved via ConfigMap patch
|
|
|
|
## OBS Requirements Verified
|
|
|
|
| Requirement | Description | Status |
|
|
|-------------|-------------|--------|
|
|
| OBS-01 | Prometheus collects cluster metrics | Verified |
|
|
| OBS-02 | Grafana dashboards display cluster metrics | Verified |
|
|
| OBS-03 | Loki stores application logs | Verified |
|
|
| OBS-04 | Alloy collects and forwards logs | Verified |
|
|
| OBS-05 | Grafana can query logs from Loki | Verified |
|
|
| OBS-06 | Critical alerts configured (KubePodCrashLooping) | Verified |
|
|
| OBS-07 | Grafana TLS via Traefik | Verified |
|
|
| OBS-08 | TaskPlanner /metrics endpoint | Verified |
|
|
|
|
## User Setup Required
|
|
|
|
None - all configuration applied to cluster. No external service setup required.
|
|
|
|
## Next Phase Readiness
|
|
|
|
- Phase 8 (Observability Stack) complete
|
|
- Ready for Phase 9 (Security Hardening) or ongoing operations
|
|
- Observability foundation established for production monitoring
|
|
|
|
---
|
|
*Phase: 08-observability-stack*
|
|
*Completed: 2026-02-03*
|