Add a PodDisruptionBudget for CoreDNS

During testing on GitHub runners in the CI pipeline, it was observed that the CoreDNS pods were susceptible to unexpected evictions, especially when nodes experienced disk pressure. The PDB should protect the last pod from being evicted. Signed-off-by: Tom Wieczorek <[email protected]>
twz123 · Oct 11, 2023 · 92f9086 · 92f9086
1 parent f9de64b
commit 92f9086
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/pkg/component/controller/coredns.go b/pkg/component/controller/coredns.go
@@ -217,6 +217,20 @@ spec:
             - key: Corefile
               path: Corefile
 ---
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: coredns
+  namespace: kube-system
+  labels:
+    k8s-app: kube-dns
+    kubernetes.io/name: "CoreDNS"
+spec:
+  minAvailable: 50%
+  selector:
+    matchLabels:
+      k8s-app: kube-dns
+---
 apiVersion: v1
 kind: Service
 metadata: