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ClusterTrustBundles: Define types

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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
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hack/lib/init.sh
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@@ -88,6 +88,7 @@ batch/v1 \
batch/v1beta1 \
certificates.k8s.io/v1 \
certificates.k8s.io/v1beta1 \
certificates.k8s.io/v1alpha1 \
coordination.k8s.io/v1beta1 \
coordination.k8s.io/v1 \
discovery.k8s.io/v1 \