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feat(lab-11): observability stack with metrics, logs, and alerts - #12
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Oct 9, 2026
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- stacks/observability: Prometheus, Alertmanager, Grafana, Loki, Alloy, node-exporter, cAdvisor; Docker API only through a read-only socket proxy; Grafana data sources and dashboard provisioned
- hello-api: /metrics with RED metrics per route pattern (no high-cardinality paths) and a visits counter; tested
- Traefik: Prometheus metrics entry point; scrape labels on Traefik and hello-api for Docker service discovery
- Alert rules incl. ServiceMissing via absent(): discovered targets vanish instead of going down
- Lab 11 guide and knowledge base with measured results
- stacks/observability: Prometheus, Alertmanager, Grafana, Loki, Alloy, node-exporter, cAdvisor; Docker API only through a read-only socket proxy; Grafana data sources and dashboard provisioned - hello-api: /metrics with RED metrics per route pattern (no high-cardinality paths) and a visits counter; tested - Traefik: Prometheus metrics entry point; scrape labels on Traefik and hello-api for Docker service discovery - Alert rules incl. ServiceMissing via absent(): discovered targets vanish instead of going down - Lab 11 guide and knowledge base with measured results Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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