Support global image registry

- introduce `.global.imageRegistry` value to allow global configuration
  of the image registry
- split up `image.repository` into `image.registry` and `image.repository`
  to allow separate configuration
- use `image.registry` if `.global.imageRegistry` is not set

Signed-off-by: Fiete Ostkamp <F.Ostkamp@web.de>

Author: FieteO

helm/oauth2-proxy/Chart.yaml

@@ -32,7 +32,7 @@ kubeVersion: ">=1.16.0-0"
 annotations:
   artifacthub.io/changes: |
     - kind: added
-      description: Add HTTPRoutes for Gateway API support
+      description: Add .global.imageRegistry key to override image.registry
       links:
         - name: Github PR
-          url: https://github.com/oauth2-proxy/manifests/pull/369
+          url: https://github.com/oauth2-proxy/manifests/pull/367

helm/oauth2-proxy/templates/deployment.yaml

@@ -108,7 +108,7 @@ spec:
       {{- end }}
       containers:
       - name: {{ .Chart.Name }}
-        image: "{{ .Values.image.repository }}:{{ include "oauth2-proxy.version" . }}"
+        image: "{{ .Values.global.imageRegistry | default .Values.image.registry }}/{{ .Values.image.repository }}:{{ include "oauth2-proxy.version" . }}"
         imagePullPolicy: {{ .Values.image.pullPolicy }}
         {{- if .Values.image.command }}
         command:

helm/oauth2-proxy/values.yaml

@@ -1,9 +1,10 @@
-global: {}
-# To help compatibility with other charts which use global.imagePullSecrets.
-# global:
-#   imagePullSecrets:
-#   - name: pullSecret1
-#   - name: pullSecret2
+global:
+  # Global registry to pull the images from
+  imageRegistry: ""
+  # To help compatibility with other charts which use global.imagePullSecrets.
+  imagePullSecrets: []
+  #   - name: pullSecret1
+  #   - name: pullSecret2
 
 ## Override the deployment namespace
 ##
@@ -74,7 +75,8 @@ alphaConfig:
   existingSecret: ~
 
 image:
-  repository: "quay.io/oauth2-proxy/oauth2-proxy"
+  registry: "quay.io"
+  repository: "oauth2-proxy/oauth2-proxy"
   # appVersion is used by default
   tag: ""
   pullPolicy: "IfNotPresent"