fix: [alert] KubeAggregatedAPIDown (default) (#843 )

2026-09-16 06:46:48 +00:00
1 changed files with 13 additions and 0 deletions
@@ -37,3 +37,16 @@ spec:
    args:
      - --kubelet-insecure-tls
      - --kubelet-preferred-address-types=InternalIP
+    # v1beta1.metrics.k8s.io is a cluster-scoped API: with a single replica,
+    # any single-node disruption takes the aggregated API to 0 % availability
+    # (KubeAggregatedAPIDown) and breaks every HPA. Run two replicas pinned to
+    # different nodes, matching upstream's high-availability manifest.
+    replicas: 2
+    affinity:
+      podAntiAffinity:
+        requiredDuringSchedulingIgnoredDuringExecution:
+          - topologyKey: kubernetes.io/hostname
+            labelSelector:
+              matchLabels:
+                app.kubernetes.io/name: metrics-server
+                app.kubernetes.io/instance: metrics-server