Add initContainers and container command to common chart (#260)

* Add initContainers and container command to common chart

* revert autolint

charts/common/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: common
 description: A generic helm chart for Kubernetes
 type: application
-version: 0.6.6
+version: 0.6.7
 maintainers:
   - name: Parity
     url: https://github.com/paritytech/helm-charts

charts/common/templates/deployment.yaml

@@ -40,12 +40,21 @@ spec:
       serviceAccountName: {{ include "common.serviceAccountName" . }}
       securityContext:
         {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      {{- if .Values.initContainers}}
+      initContainers:
+        - name: {{ .Values.initContainers.name }}
+          image: {{ .Values.initContainers.image }}
+          command: {{ .Values.initContainers.command }}
+      {{- end }}
       containers:
         - name: {{ .Chart.Name }}
           securityContext:
             {{- toYaml .Values.containerSecurityContext | nindent 12 }}
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
+          {{- with .Values.command }}
+          command: {{- toYaml . | nindent 12 }}
+          {{- end }}
           {{- with .Values.args }}
           args: {{- toYaml . | nindent 12 }}
           {{- end }}

charts/common/values.yaml

@@ -29,6 +29,10 @@ image:
 ##
 args: []
 
+## Override default container command
+##
+command: []
+
 ## Number of replicas for the pod
 ##
 replicaCount: 1
@@ -38,6 +42,13 @@ replicaCount: 1
 ##
 imagePullSecrets: []
 
+## Define init container
+## ref: https://kubernetes.io/docs/concepts/workloads/pods/init-containers/
+# initContainers:
+#   - name: init-container
+#     image: busybox:1.28
+#     command: ['sh', '-c', "sleep 30"]
+
 ## Service account for the pod to use
 ## ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/
 ##