[stable/rabbitmq-ha] env variables and init containers (#14932)

* add rabbitmq env variables

Signed-off-by: radu mazilu <radumazi2@gmail.com>

* add extra init containers

Signed-off-by: radu mazilu <radumazi2@gmail.com>

* PR changes

Signed-off-by: radu mazilu <radumazi2@gmail.com>

* Bump chart version

Signed-off-by: radu mazilu <radumazi2@gmail.com>

stable/rabbitmq-ha/Chart.yaml

@@ -1,7 +1,7 @@
 name: rabbitmq-ha
 apiVersion: v1
 appVersion: 3.7.15
-version: 1.28.0
+version: 1.29.0
 description: Highly available RabbitMQ cluster, the open source message broker
   software that implements the Advanced Message Queuing Protocol (AMQP).
 keywords:

stable/rabbitmq-ha/README.md

@@ -69,6 +69,8 @@ and their default values.
 | `existingSecret`                               | Use an existing secret for password, managementPassword & erlang cookie                                                                                                                                                   | `""`                                                       |
 | `extraPlugins`                                 | Additional plugins to add to the default configmap                                                                                                                                                    | `rabbitmq_shovel, rabbitmq_shovel_management, rabbitmq_federation, rabbitmq_federation_management,` |
 | `extraConfig`                                  | Additional configuration to add to default configmap                                                                                                                                                  | `{}`                                                         |
+| `extraInitContainers`                          | Additional init containers passed through the tpl 	                                                                                                                                                   | `[]`                                                         |
+| `env`                                          | Environment variables to set for Rabbitmq container                                                                                                                                                   | `{}`                                                         |
 | `advancedConfig`                               | Additional configuration in classic config format                                                                                                                                                   | `""`                                                           |
 | `definitions.users`                            | Additional users | `""` |
 | `definitions.vhosts`                           | Additional vhosts | `""` |
@@ -253,3 +255,9 @@ the following keys:
 ### Prometheus Monitoring & Alerts
 
 Prometheus and its features can be enabled by setting `prometheus.enabled` to `true`.  See values.yaml for more details and configuration options
+
+### Usage of the `tpl` Function
+
+The `tpl` function allows us to pass values from `values.yaml` through the templating engine. It is used for the following values:
+
+* `extraInitContainers`

stable/rabbitmq-ha/templates/statefulset.yaml

@@ -76,6 +76,9 @@ spec:
               mountPath: /etc/rabbitmq
             - name: {{ .Values.persistentVolume.name }}
               mountPath: /var/lib/rabbitmq
+{{- if .Values.extraInitContainers }}
+{{ tpl (toYaml .Values.extraInitContainers) . | indent 8 }}
+{{- end }}
       containers:
         - name: {{ .Chart.Name }}
           image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
@@ -174,6 +177,10 @@ spec:
             - name: RABBITMQ_HIPE_COMPILE
               value: {{ .Values.rabbitmqHipeCompile | quote }}
             {{- end }}
+            {{- range $key, $value := .Values.env }}
+            - name: {{ $key }}
+              value: {{ $value | quote }}
+            {{- end }}            
           resources:
 {{ toYaml .Values.resources | indent 12 }}
           volumeMounts:

stable/rabbitmq-ha/values.yaml

@@ -343,6 +343,9 @@ initContainer:
   #     cpu: 100m
   #     memory: 128Mi
 
+## Additional init containers
+extraInitContainers: []
+
 ## Use an alternate scheduler, e.g. "stork".
 ## ref: https://kubernetes.io/docs/tasks/administer-cluster/configure-multiple-schedulers/
 ##
@@ -450,6 +453,9 @@ securityContext:
   runAsNonRoot: true
   runAsUser: 100
 
+## Sets environment variables for the rabbitmq container
+env: {}
+
 prometheus:
   ## Configures Prometheus Exporter to expose and scrape stats.
   exporter: