Fix Grafana CrashLoopBackOff -- disable loki-stack sidecar datasource #21

Merged

forgejo_admin merged 1 commit from 18-fix-grafana-duplicate-datasource-v3 into main

2026-03-06 13:10:46 +00:00

forgejo_admin commented

2026-03-06 13:07:22 +00:00

Owner

Summary

Fixes Grafana CrashLoopBackOff caused by duplicate default datasources
The loki-stack Helm chart auto-generates a ConfigMap with isDefault: true, conflicting with the kube-prometheus-stack default Prometheus datasource
Disables the loki-stack sidecar datasource so only the custom grafana-loki-datasource ConfigMap is used

Changes

terraform/main.tf: Added sidecar = { datasources = { enabled = false } } to the loki-stack Helm release's grafana block, preventing the chart from auto-provisioning a competing default datasource

Test Plan

tofu fmt -check passes (no formatting issues)
tofu validate -- requires provider init (not available in worktree); HCL is syntactically correct
tofu plan -- should show only the loki-stack Helm release updating
After apply: verify Grafana pod starts without CrashLoopBackOff
Verify Loki datasource still available via the custom grafana-loki-datasource ConfigMap

Review Checklist

Passed automated review-fix loop
No secrets committed
No unnecessary file changes
Commit messages are descriptive

todo-fix-grafana-duplicate-default-datasource -- the issue this PR addresses
Forgejo issue: #18

## Summary - Fixes Grafana CrashLoopBackOff caused by duplicate default datasources - The loki-stack Helm chart auto-generates a ConfigMap with `isDefault: true`, conflicting with the kube-prometheus-stack default Prometheus datasource - Disables the loki-stack sidecar datasource so only the custom `grafana-loki-datasource` ConfigMap is used ## Changes - `terraform/main.tf`: Added `sidecar = { datasources = { enabled = false } }` to the loki-stack Helm release's `grafana` block, preventing the chart from auto-provisioning a competing default datasource ## Test Plan - [x] `tofu fmt -check` passes (no formatting issues) - [ ] `tofu validate` -- requires provider init (not available in worktree); HCL is syntactically correct - [ ] `tofu plan` -- should show only the loki-stack Helm release updating - [ ] After apply: verify Grafana pod starts without CrashLoopBackOff - [ ] Verify Loki datasource still available via the custom `grafana-loki-datasource` ConfigMap ## Review Checklist - [x] Passed automated review-fix loop - [x] No secrets committed - [x] No unnecessary file changes - [x] Commit messages are descriptive ## Related Notes - `todo-fix-grafana-duplicate-default-datasource` -- the issue this PR addresses - Forgejo issue: #18

forgejo_admin added 1 commit

2026-03-06 13:07:22 +00:00

Fix Grafana CrashLoopBackOff by disabling loki-stack sidecar datasource f10e148494

The loki-stack Helm chart auto-generates a ConfigMap with isDefault: true,
conflicting with the kube-prometheus-stack default datasource. Disable the
loki-stack sidecar datasource provisioning so only the custom
grafana-loki-datasource ConfigMap (isDefault: false) is used.

Closes #18

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>