Fix several Helm YAML issues with extraModules and extraInitContainers (#9709)

* Fix indention issue for DaemonSets when using extraModules and extraInitContainers

* Improve documentation

* Unify and fix templating

* Enable support for the opentelemetry from values.yaml

Author: ajacques

charts/ingress-nginx/templates/controller-daemonset.yaml

@@ -178,17 +178,14 @@ spec:
       {{- end }}
       {{- if .Values.controller.extraModules }}
         {{- range .Values.controller.extraModules }}
-          - name: {{ .Name }}
-            image: {{ .Image }}
-            command: ['sh', '-c', '/usr/local/bin/init_module.sh']
-            {{- if (or $.Values.controller.containerSecurityContext .containerSecurityContext) }}
-            securityContext: {{ .containerSecurityContext | default $.Values.controller.containerSecurityContext | toYaml | nindent 14 }}
-            {{- end }}
-            volumeMounts:
-              - name: modules
-                mountPath: /modules_mount
+          {{ $containerSecurityContext := .containerSecurityContext | default $.Values.controller.containerSecurityContext }}
+{{ include "extraModules" (dict "name" .name "image" .image "containerSecurityContext" $containerSecurityContext) | indent 8 }}
         {{- end }}
       {{- end }}
+      {{- if .Values.controller.opentelemetry.enabled}}
+          {{ $otelContainerSecurityContext := $.Values.controller.opentelemetry.containerSecurityContext | default $.Values.controller.containerSecurityContext }}
+          {{- include "extraModules" (dict "name" "opentelemetry" "image" .Values.controller.opentelemetry.image "containerSecurityContext" $otelContainerSecurityContext) | nindent 8}}
+      {{- end}}
     {{- end }}
     {{- if .Values.controller.hostNetwork }}
       hostNetwork: {{ .Values.controller.hostNetwork }}
@@ -207,9 +204,9 @@ spec:
     {{- end }}
       serviceAccountName: {{ template "ingress-nginx.serviceAccountName" . }}
       terminationGracePeriodSeconds: {{ .Values.controller.terminationGracePeriodSeconds }}
-    {{- if (or .Values.controller.customTemplate.configMapName .Values.controller.extraVolumeMounts .Values.controller.admissionWebhooks.enabled .Values.controller.extraVolumes .Values.controller.extraModules) }}
+    {{- if (or .Values.controller.customTemplate.configMapName .Values.controller.extraVolumeMounts .Values.controller.admissionWebhooks.enabled .Values.controller.extraVolumes .Values.controller.extraModules .Values.controller.opentelemetry.enabled) }}
       volumes:
-      {{- if .Values.controller.extraModules }}
+      {{- if (or .Values.controller.extraModules .Values.controller.opentelemetry.enabled)}}
         - name: modules
           emptyDir: {}
       {{- end }}

charts/ingress-nginx/templates/controller-deployment.yaml

@@ -185,7 +185,7 @@ spec:
       {{- if .Values.controller.extraModules }}
         {{- range .Values.controller.extraModules }}
           {{ $containerSecurityContext := .containerSecurityContext | default $.Values.controller.containerSecurityContext }}
-          {{- include "extraModules" (dict "name" .name "image" .image "containerSecurityContext" $containerSecurityContext | nindent 8) }}
+{{ include "extraModules" (dict "name" .name "image" .image "containerSecurityContext" $containerSecurityContext) | indent 8 }}
         {{- end }}
       {{- end }}
       {{- if .Values.controller.opentelemetry.enabled}}

charts/ingress-nginx/values.yaml

@@ -527,6 +527,8 @@ controller:
 
     # -- Modules, which are mounted into the core nginx image. See values.yaml for a sample to add opentelemetry module
     extraModules: []
+    # - name: mytestmodule
+    #   image: registry.k8s.io/ingress-nginx/mytestmodule
     #   containerSecurityContext:
     #     allowPrivilegeEscalation: false
     #