Add initContainers option

Author: alexander-bauer

charts/coredns/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: coredns
-version: 1.19.7
+version: 1.19.8
 appVersion: 1.9.4
 home: https://coredns.io
 icon: https://coredns.io/images/CoreDNS_Colour_Horizontal.png

charts/coredns/templates/deployment.yaml

@@ -89,6 +89,10 @@ spec:
       {{- if .Values.nodeSelector }}
       nodeSelector:
 {{ toYaml .Values.nodeSelector | indent 8 }}
+      {{- end }}
+      {{- if .Values.initContainers }}
+      initContainers:
+{{- toYaml .Values.initContainers | nindent 8}}
       {{- end }}
       containers:
       - name: "coredns"

charts/coredns/values.yaml

@@ -42,6 +42,12 @@ rollingUpdate:
   maxUnavailable: 1
   maxSurge: 25%
 
+## Optionally, add init containers to run before the main CoreDNS container starts up.
+# initContainers:
+#   - name: helloworld
+#     image: "busybox"
+#     command: ["bash", "-c", "Hello world"]
+
 # Under heavy load it takes more that standard time to remove Pod endpoint from a cluster.
 # This will delay termination of our pod by `preStopSleep`. To make sure kube-proxy has
 # enough time to catch up.