[stable/mongodb] - Allow using custom initialization scripts (#8272)

* [stable/mongodb] - Allow using custom initialization scripts

Signed-off-by: tompizmor <tompizmor@gmail.com>

* Avoid creating config-map if not needed

Signed-off-by: tompizmor <tompizmor@gmail.com>

* Delete blank line

Signed-off-by: tompizmor <tompizmor@gmail.com>

* Add missing conditional blocks

Signed-off-by: tompizmor <tompizmor@gmail.com>

stable/mongodb/Chart.yaml

@@ -1,5 +1,5 @@
 name: mongodb
-version: 4.3.10
+version: 4.4.0
 appVersion: 4.0.3
 description: NoSQL document-oriented database that stores JSON-like documents with dynamic schemas, simplifying the integration of data in content-driven applications.
 keywords:

stable/mongodb/README.md

@@ -86,7 +86,7 @@ The following table lists the configurable parameters of the MongoDB chart and t
 | `persistence.accessMode`                | Use volume as ReadOnly or ReadWrite                                                          | `ReadWriteOnce`                                          |
 | `persistence.size`                      | Size of data volume                                                                          | `8Gi`                                                    |
 | `persistence.annotations`               | Persistent Volume annotations                                                                | `{}`                                                     |
-| `persistence.existingClaim`             | Name of an existing PVC to use (avoids creating one if this is given)                        | `nil`                                                    | 
+| `persistence.existingClaim`             | Name of an existing PVC to use (avoids creating one if this is given)                        | `nil`                                                    |
 | `livenessProbe.initialDelaySeconds`     | Delay before liveness probe is initiated                                                     | `30`                                                     |
 | `livenessProbe.periodSeconds`           | How often to perform the probe                                                               | `10`                                                     |
 | `livenessProbe.timeoutSeconds`          | When the probe times out                                                                     | `5`                                                      |
@@ -144,6 +144,12 @@ Some characteristics of this chart are:
 * The number of secondary and arbiter nodes can be scaled out independently.
 * Easy to move an application from using a standalone MongoDB server to use a replica set.
 
+## Initialize a fresh instance
+
+The [Bitnami MongoDB](https://github.com/bitnami/bitnami-docker-mongodb) image allows you to use your custom scripts to initialize a fresh instance. In order to execute the scripts, they must be located inside the chart folder `files/docker-entrypoint-initdb.d` so they can be consumed as a ConfigMap.
+
+The allowed extensions are `.sh`, and `.js`.
+
 ## Persistence
 
 The [Bitnami MongoDB](https://github.com/bitnami/bitnami-docker-mongodb) image stores the MongoDB data and configurations at the `/bitnami/mongodb` path of the container.

stable/mongodb/files/docker-entrypoint-initdb.d/README.md

@@ -0,0 +1,3 @@
+You can copy here your custom .sh, or .js file so they are executed during the first boot of the image.
+
+More info in the [bitnami-docker-mongodb](https://github.com/bitnami/bitnami-docker-mongodb#initializing-a-new-instance) repository.

stable/mongodb/templates/deployment-standalone.yaml

@@ -110,6 +110,10 @@ spec:
         volumeMounts:
         - name: data
           mountPath: /bitnami/mongodb
+        {{- if  (.Files.Glob "files/docker-entrypoint-initdb.d/*[sh|js]") }}
+        - name: custom-init-scripts
+          mountPath: /docker-entrypoint-initdb.d
+        {{- end }}
         {{- if .Values.configmap }}
         - name: config
           mountPath: /opt/bitnami/mongodb/conf/mongodb.conf
@@ -118,6 +122,11 @@ spec:
         resources:
 {{ toYaml .Values.resources | indent 10 }}
       volumes:
+      {{- if  (.Files.Glob "files/docker-entrypoint-initdb.d/*[sh|js]") }}
+      - name: custom-init-scripts
+        configMap:
+          name: {{ template "mongodb.fullname" . }}-init-scripts
+      {{- end }}
       - name: data
       {{- if .Values.persistence.enabled }}
         persistentVolumeClaim:

stable/mongodb/templates/initialization-configmap.yaml

@@ -0,0 +1,13 @@
+{{ if  (.Files.Glob "files/docker-entrypoint-initdb.d/*[sh|js]") }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "mongodb.fullname" . }}-init-scripts
+  labels:
+    app: {{ template "mongodb.name" . }}
+    chart: {{ template "mongodb.chart" . }}
+    release: {{ .Release.Name | quote }}
+    heritage: {{ .Release.Service | quote }}
+data:
+{{ (.Files.Glob "files/docker-entrypoint-initdb.d/*[sh|js]").AsConfig | indent 2 }}
+{{ end }}

stable/mongodb/templates/statefulset-primary-rs.yaml

@@ -124,17 +124,26 @@ spec:
           volumeMounts:
             - name: datadir
               mountPath: /bitnami/mongodb
-          {{- if .Values.configmap }}
+            {{- if  (.Files.Glob "files/docker-entrypoint-initdb.d/*[sh|js]") }}
+            - name: custom-init-scripts
+              mountPath: /docker-entrypoint-initdb.d
+            {{- end }}
+            {{- if .Values.configmap }}
             - name: config
               mountPath: /opt/bitnami/mongodb/conf/mongodb.conf
               subPath: mongodb.conf
-          {{- end }}
+            {{- end }}
       volumes:
-      {{- if .Values.configmap }}
+        {{- if  (.Files.Glob "files/docker-entrypoint-initdb.d/*[sh|js]") }}
+        - name: custom-init-scripts
+          configMap:
+            name: {{ template "mongodb.fullname" . }}-init-scripts
+        {{- end }}
+        {{- if .Values.configmap }}
         - name: config
           configMap:
             name: {{ template "mongodb.fullname" . }}
-      {{- end }}
+        {{- end }}
 {{- if .Values.persistence.enabled }}
   volumeClaimTemplates:
     - metadata: