ClusterTrustBundles: Define types

This commit is the main API piece of KEP-3257 (ClusterTrustBundles).

This commit:

* Adds the certificates.k8s.io/v1alpha1 API group
* Adds the ClusterTrustBundle type.
* Registers the new type in kube-apiserver.
* Implements the type-specfic validation specified for
  ClusterTrustBundles:
  - spec.pemTrustAnchors must always be non-empty.
  - spec.signerName must be either empty or a valid signer name.
  - Changing spec.signerName is disallowed.
* Implements the "attest" admission check to restrict actions on
  ClusterTrustBundles that include a signer name.

Because it wasn't specified in the KEP, I chose to make attempts to
update the signer name be validation errors, rather than silently
ignored.

I have tested this out by launching these changes in kind and
manipulating ClusterTrustBundle objects in the resulting cluster using
kubectl.
This commit is contained in:
Taahir Ahmed
2022-11-04 12:20:25 -07:00
parent 742316ee21
commit 6a75e7c40c
30 changed files with 1979 additions and 7 deletions

View File

@@ -67,6 +67,12 @@ const (
// Enables dual-stack --node-ip in kubelet with external cloud providers
CloudDualStackNodeIPs featuregate.Feature = "CloudDualStackNodeIPs"
// owner: @ahmedtd
// alpha: v1.26
//
// Enable ClusterTrustBundle objects and Kubelet integration.
ClusterTrustBundle featuregate.Feature = "ClusterTrustBundle"
// owner: @szuecs
// alpha: v1.12
//
@@ -934,6 +940,8 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
CloudDualStackNodeIPs: {Default: false, PreRelease: featuregate.Alpha},
ClusterTrustBundle: {Default: false, PreRelease: featuregate.Alpha},
CPUCFSQuotaPeriod: {Default: false, PreRelease: featuregate.Alpha},
CPUManager: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // GA in 1.26