fix(prometheus): pin to az-a + longhorn-wffc SC — RWO PVC failed to attach on cp-2 (sole Longhorn node is cp-1)

2026-07-21 11:14:11 -07:00
parent 21e3987b11
commit f2f4a2580f
1 changed files with 8 additions and 2 deletions
@@ -36,12 +36,18 @@ prometheus:
    scrapeTimeout: 60s
    evaluationInterval: 30s

+    # Pin to az-a (talos-cp-1) — sole Longhorn node; else the RWO PVC can't
+    # attach on cp-2/cp-3 (CSINode lacks driver.longhorn.io).
+    nodeSelector:
+      topology.kubernetes.io/zone: az-a
+
    # Persistent storage — metrics survive node reboots and pod restarts.
-    # Longhorn reattaches the PVC automatically when the pod reschedules.
+    # longhorn-wffc (WaitForFirstConsumer) binds after scheduling so the volume
+    # lands on the node the pod runs on.
    storageSpec:
      volumeClaimTemplate:
        spec:
-          storageClassName: longhorn
+          storageClassName: longhorn-wffc
          accessModes: ["ReadWriteOnce"]
          resources:
            requests: