feat: add support for custom initContainers

Signed-off-by: uid54289 <120799552+uid54289@users.noreply.github.com>

charts/authelia/README.md

@@ -96,6 +96,7 @@ This documents the parameters in the chart values. As the chart values are quite
 |                 pod.kind                  | Configures the kind of pod: StatefulSet, Deployment, DaemonSet |   DaemonSet   |
 |              pod.annotations              |            Adds annotations specifically to the pod            |      {}       |
 |                pod.labels                 |              Adds labels specifically to the pod               |      {}       |
+|            pod.initContainers             |    Adds additional init containers specifically to the pod     |      []       |
 |               pod.replicas                |     Configures the replicas for Deployment's/statefulSet's     |       1       |
 |         pod.revisionHistoryLimit          |              Configures the revisionHistoryLimit               |       1       |
 |             pod.strategy.type             |        Configures the pods strategy/updateStrategy type        | RollingUpdate |

charts/authelia/templates/_helpers.tpl

@@ -476,6 +476,19 @@ Renders a probe
     {{- end -}}
 {{- end -}}
 
+{{/*
+Renders a value that contains template.
+Usage:
+{{ include "authelia.snippets.render" ( dict "value" .Values.path.to.the.Value "context" $) }}
+*/}}
+{{- define "authelia.snippets.render" -}}
+    {{- if typeIs "string" .value }}
+        {{- tpl .value .context }}
+    {{- else }}
+        {{- tpl (.value | toYaml) .context }}
+    {{- end }}
+{{- end -}}
+
 {{/*
 Returns the service port.
 */}}

charts/authelia/templates/deployment.yaml

@@ -82,6 +82,9 @@ spec:
       serviceAccountName: {{ default (include "authelia.name" .) .Values.rbac.serviceAccountName }}
       {{- end }}
       enableServiceLinks: {{ .Values.pod.enableServiceLinks | default false }}
+      {{- if .Values.pod.initContainers }}
+      initContainers: {{- include "authelia.snippets.render" (dict "value" .Values.pod.initContainers "context" $) | nindent 8 }}
+      {{- end }}
       containers:
       - name: authelia
         image: {{ include "authelia.image" . }}

charts/authelia/values.local.yaml

@@ -214,6 +214,12 @@ pod:
   # labels:
   #   myLabel: 'myValue'
 
+  initContainers: []
+  # initContainers:
+  # - name: myapp-init
+  #   image: busybox:1.36
+  #   command: ['sh', '-c', 'echo The app is starting! && sleep 5']
+
   replicas: 1
   revisionHistoryLimit: 5
   priorityClassName: ''

charts/authelia/values.yaml

@@ -227,6 +227,12 @@ pod:
   # labels:
   #   myLabel: 'myValue'
 
+  initContainers: []
+  # initContainers:
+  # - name: myapp-init
+  #   image: busybox:1.36
+  #   command: ['sh', '-c', 'echo The app is starting! && sleep 5']
+
   replicas: 1
   revisionHistoryLimit: 5
   priorityClassName: ''