feat: override helm chart images for init containers (#18834)

Small enhancement to permit usage of different image registries

Co-authored-by: Christian Körner <ck@ps-xaf.de>

deploy/helm/templates/statefulset.yaml

@@ -46,12 +46,20 @@ spec:
       initContainers:
       {{- if .Values.redis.enabled }}
       - name: redis-init-container
-        image: alpine
+      {{- if ((.Values.initContainer.redis).image) }}
+        image: {{ .Values.initContainer.redis.image }}
+      {{- else }}
+        image: "alpine"
+      {{- end }}
         command: ['sh', '-c', "apk add redis; until redis-cli -h {{ include "appsmith.fullname" . }}-redis-master.{{.Release.Namespace}}.svc.cluster.local ping; do echo waiting for redis; sleep 2; done"]
       {{- end }}
       {{- if .Values.mongodb.enabled }}
       - name: mongo-init-container
-        image: docker.io/bitnami/mongodb:4.4.11-debian-10-r12
+      {{- if ((.Values.initContainer.mongodb).image) }}
+        image: {{ .Values.initContainer.mongodb.image }}
+      {{- else }}
+        image:  "docker.io/bitnami/mongodb:4.4.11-debian-10-r12"
+      {{- end }}
         command: ['sh', '-c', "until mongo --host appsmith-mongodb.{{.Release.Namespace}}.svc.cluster.local --eval 'db.runCommand({ping:1})' ; do echo waiting for mongo; sleep 2; done"]
       {{- end }}
       containers:

deploy/helm/values.yaml

@@ -12,7 +12,7 @@ mongodb:
     nameOverride: appsmith-mongodb
   auth:
     rootUser: root
-    rootPassword : password
+    rootPassword: password
   replicaCount: 2
   architecture: "replicaset"
   replicaSetName: rs0
@@ -49,6 +49,14 @@ schedulerName: ""
 ## It can be set to RollingUpdate or Recreate by default.
 ##
 strategyType: RollingUpdate
+##
+## Init containers for redis & mongodb
+##
+initContainer: {}
+  # redis:
+  #   image: alpine
+  # mongodb:
+  #   image:  docker.io/bitnami/mongodb:4.4.11-debian-10-r12
 ## Image
 ##
 image: