jsonnet: establish convention for components default fields

Signed-off-by: paulfantom <pawel@krupa.net.pl>

jsonnet/kube-prometheus/components/prometheus-operator.libsonnet

@@ -3,13 +3,15 @@ local prometheusOperator = import 'github.com/prometheus-operator/prometheus-ope
 
 local defaults = {
   local defaults = self,
-  name: 'prometheus-operator',
-  namespace: error 'must provide namespace',
-  version: error 'must provide version',
-  image: error 'must provide image',
-  kubeRbacProxyImage: error 'must provide kubeRbacProxyImage',
-  configReloaderImage: error 'must provide config reloader image',
-  resources: {
+  // Convention: Top-level fields related to CRDs are public, other fields are hidden
+  // If there is no CRD for the component, everything is hidden in defaults.
+  name:: 'prometheus-operator',
+  namespace:: error 'must provide namespace',
+  version:: error 'must provide version',
+  image:: error 'must provide image',
+  kubeRbacProxyImage:: error 'must provide kubeRbacProxyImage',
+  configReloaderImage:: error 'must provide config reloader image',
+  resources:: {
     limits: { cpu: '200m', memory: '200Mi' },
     requests: { cpu: '100m', memory: '100Mi' },
   },
@@ -24,7 +26,7 @@ local defaults = {
     for labelName in std.objectFields(defaults.commonLabels)
     if !std.setMember(labelName, ['app.kubernetes.io/version'])
   },
-  mixin: {
+  mixin:: {
     ruleLabels: {
       role: 'alert-rules',
       prometheus: defaults.name,