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Migrate observability stack to Kubernetes (#42)

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Note: the name of this branch was chosen before the scope widened to encompass the entire observability stack.

Summary

  - Fix Grafana data source URLs (docker driver uses host.minikube.internal, not host.containers.internal)
  - Migrate Prometheus and Loki from indri to Kubernetes with Tailscale Ingresses
  - Expose CNPG PostgreSQL metrics via Tailscale and update dashboard to use cnpg_* metrics
  - Update Alloy to push metrics/logs to k8s endpoints (prometheus.tail8d86e.ts.net, loki.tail8d86e.ts.net)
  - Add ACL rule for port 9187 (CNPG metrics)
  - Delete obsolete ansible roles for prometheus and loki

Changes

  - argocd/manifests/prometheus/ - New Prometheus StatefulSet with 20Gi PVC and Tailscale Ingress
  - argocd/manifests/loki/ - New Loki StatefulSet with 20Gi PVC and Tailscale Ingress
  - argocd/apps/prometheus.yaml, argocd/apps/loki.yaml - ArgoCD Applications
  - argocd/manifests/grafana/values.yaml - Data sources now use k8s internal DNS
  - argocd/manifests/databases/service-metrics-tailscale.yaml - CNPG metrics endpoint
  - argocd/manifests/grafana-config/dashboards/configmap-postgresql.yaml - Updated to cnpg_* metrics
  - ansible/roles/alloy/defaults/main.yml - Push to k8s Tailscale endpoints
  - pulumi/policy.hujson - ACL for port 9187
  - Deleted ansible/roles/prometheus/ and ansible/roles/loki/

Deployment and Testing

  - Stop prometheus and loki on indri
  - Sync ArgoCD apps (apps, prometheus, loki, grafana)
  - Run mise run provision-indri -- --tags alloy
  - Verify Grafana dashboards show data

🤖 Generated with https://claude.ai/claude-code

Reviewed-on: https://forge.tail8d86e.ts.net/eblume/blumeops/pulls/42
This commit is contained in:
Erich Blume 2026-01-22 12:06:02 -08:00
commit 17023085cb
36 changed files with 569 additions and 270 deletions
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ansible/roles/alloy/templates/config.alloy.j2
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@ -43,7 +43,7 @@ prometheus.exporter.postgres "postgresql" {
data_source_names = ["postgresql://{{ alloy_postgres_user }}:{{ alloy_postgres_password | urlencode }}@{{ alloy_postgres_host }}:{{ alloy_postgres_port }}/{{ alloy_postgres_database }}?sslmode=disable"]
// Custom queries for vacuum and XID monitoring
custom_queries_config_path = "/opt/homebrew/etc/grafana-alloy/postgres_queries.yaml"
custom_queries_config_path = "{{ alloy_config_dir }}/postgres_queries.yaml"
}
// Scrape PostgreSQL metrics