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kps: bump Grafana memory limit 256Mi->512Mi (Grafana 12.x OOMKill was root cause of 65->88 upgrade timeout)

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Grafana 12.x bundled in kps 88 OOMKilled (exit 137) at 256Mi during grafana-apiserver/unified-storage
startup — no fatal log, just SIGKILL. The new Grafana pod never became Ready, so Helm --wait ran the full
20m and rolled back to 65.8.1 every time. 512Mi holds.

Co-Authored-By: Claude Opus 4.8 <[email protected]>
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jakman85andClaude Opus 4.8 committed 2026-08-30 14:52:06 -05:00
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commit b2b1aa55e2
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platform/monitoring/kube-prometheus-stack.yaml
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@@ -172,9 +172,11 @@ spec:
resources: resources:
requests: requests:
cpu: 50m cpu: 50m
memory: 128Mi memory: 256Mi # Grafana 12.x (kps 88) baseline is well above Grafana 11.x (kps 65)
limits: limits:
memory: 256Mi memory: 512Mi # 256Mi OOMKilled (exit 137) Grafana 12.x during apiserver/unified-storage
# startup — the silent SIGKILL that made the whole 65->88 Helm upgrade
# time out (the new Grafana pod never went Ready). 512Mi holds.
# --- Keycloak native-OIDC SSO (ADR-0014, deliverable #4 SSO proof) --- # --- Keycloak native-OIDC SSO (ADR-0014, deliverable #4 SSO proof) ---
# Grafana is a confidential OIDC client of the Keycloak `homelab` realm. The client SECRET comes # Grafana is a confidential OIDC client of the Keycloak `homelab` realm. The client SECRET comes
# from the SOPS-encrypted grafana-oidc-credentials Secret via env (referenced by name only, # from the SOPS-encrypted grafana-oidc-credentials Secret via env (referenced by name only,