Remove support for legacy image field for image specifications

The `image` field was deprecated in component version v6. We now remove
the field, so we can do the roll out of ArgoCD v2.9 with the new Kapitan
sidecar plugin which uses a different container image with as little
manual configuration as possible.

component/common.libsonnet

@@ -9,14 +9,15 @@ local evaluate_log_format = function(component)
 
 local render_image(imagename, include_tag=false) =
   local imagespec = params.images[imagename];
+  local img = '%(registry)s/%(repository)s' % imagespec;
   local image =
     if std.objectHas(imagespec, 'image') && imagespec.image != null then
       std.trace(
-        'Field `image` for selecting the container image `%s` has been deprecated in favor of fields `registry` and `repository`, please update your config' % imagename,
-        imagespec.image
+        'Field `image` for selecting the container image `%s` has been removed. Please use fields `registry` and `repository` instead' % imagename,
+        img
       )
     else
-      '%(registry)s/%(repository)s' % imagespec;
+      img;
   if include_tag then
     '%(image)s:%(tag)s' % { image: image, tag: imagespec.tag }
   else

docs/modules/ROOT/pages/references/parameters.adoc

@@ -41,6 +41,7 @@ SSH known hosts for Git servers.
 type:: dictionary
 
 Dictionary containing the container images used by this component.
+Each entry follows the https://syn.tools/syn/explanations/commodore-components/container-images.html[Commodore component best practices] for specifying container images.
 
 == `log_level`
 

tests/golden/params/argocd/argocd/25_hooks/hooks.yaml

@@ -86,7 +86,7 @@ spec:
           env:
             - name: HOME
               value: /home
-          image: mymirror.io/kubectl:1.28.4@sha256:9aa77d80cf5d32e0345c8468a45d39134a8016e30eccddaf720bf197ad7dd9f0
+          image: mymirror.io/bitnami/kubectl:1.28.4@sha256:9aa77d80cf5d32e0345c8468a45d39134a8016e30eccddaf720bf197ad7dd9f0
           imagePullPolicy: IfNotPresent
           name: argocd-post-sync
           ports: []

tests/params.yml

@@ -14,7 +14,7 @@ parameters:
         registry: mymirror.io
         repository: vault
       kubectl:
-        image: mymirror.io/kubectl
+        registry: mymirror.io
       kube_rbac_proxy:
         registry: mymirror.io
         tag: v1.1.1