Enable adding annotations to apiservice resources (#865)

Signed-off-by: Jens Hausherr <jens.hausherr@pflege.de>

docs/helm/templates/custom-metrics-apiservice.yaml

@@ -3,6 +3,13 @@ apiVersion: apiregistration.k8s.io/v1
 kind: APIService
 metadata:
   name: v1beta1.custom.metrics.k8s.io
+  {{- with .Values.customMetricsApi.annotations }}
+  annotations:
+    {{- range $k, $v := . }}
+      {{- $value := $v | quote }}
+      {{- printf "%s: %s" (tpl $k $) (tpl $value $) | nindent 4 }}
+    {{- end }}
+  {{- end }}
 spec:
   service:
     name: kube-metrics-adapter
@@ -13,3 +20,4 @@ spec:
   groupPriorityMinimum: 100
   versionPriority: 100
 {{- end}}
+""

docs/helm/templates/external-metrics-apiservice.yaml

@@ -3,6 +3,13 @@ apiVersion: apiregistration.k8s.io/v1
 kind: APIService
 metadata:
   name: v1beta1.external.metrics.k8s.io
+  {{- with .Values.externalMetricsApi.annotations }}
+  annotations:
+    {{- range $k, $v := . }}
+      {{- $value := $v | quote }}
+      {{- printf "%s: %s" (tpl $k $) (tpl $value $) | nindent 4 }}
+    {{- end }}
+  {{- end }}
 spec:
   service:
     name: kube-metrics-adapter

docs/helm/values.yaml

@@ -15,7 +15,19 @@ addDirectoryHeader:
 contentionProfiling:
 profiling:
 enableCustomMetricsApi: true
+
+# -- add annotations to the custom metrics apiservice resource, e.g.
+# cert-manager.io/inject-ca-from: {{.Release.Namespace}}/kube-metrics-adapter to inject the CA certificate form a cert-manager-issued cert used for the deployment
+customMetricsApi:
+  annotations: {}
+
 enableExternalMetricsApi: true
+
+# -- add annotations to the custom metrics apiservice resource, e.g.
+# cert-manager.io/inject-ca-from: {{.Release.Namespace}}/kube-metrics-adapter to inject the CA certificate form a cert-manager-issued cert used for the deployment
+externalMetricsApi:
+  annotations: {}
+
 credentialsDirectory:
 disregardIncompatibleHPAs:
 http2MaxStreamsPerConnection: