Support ClusterTrustBundle #6351
Description
it would be good if we can support ClusterTrustBundle as CA source to reduce the cost of distributing configmap/secret in every namespace.
Check the feature gates here: https://kubernetes.io/docs/reference/command-line-tools-reference/feature-gates/#feature-gates-for-alpha-or-beta-features
| Feature | Default | Stage | Since | Until |
|---|---|---|---|---|
| ClusterTrustBundle | false | Alpha | 1.27 | 1.32 |
| ClusterTrustBundle | false | Beta | 1.33 | – |
| ClusterTrustBundleProjection | false | Alpha | 1.29 | 1.32 |
| ClusterTrustBundleProjection | false | Beta | 1.33 | – |
Let's support v1alpha1 first, and move to v1beta1 later.
Let's go for v1beta1 since it's beta in v1.33.