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dra api: implement semver attribute value type

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This adds support for semantic version comparison to the CEL support in the
"named resources" structured parameter model. For example, it can be used to
check that an instance supports a certain API level.

To minimize the risk, the new "semver" type is only defined in the CEL
environment for DRA expressions, not in the base library. See
https://github.com/kubernetes/kubernetes/pull/123664 for a PR which
adds it to the base library.

Validation of semver strings is done with the regular expression from
semver.org. The actual evaluation at runtime then uses semver/v4.
This commit is contained in:
Patrick Ohly
2024-03-04 09:13:19 +01:00
parent 234dc1f63d
commit 42ee56f093
25 changed files with 891 additions and 194 deletions
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1
api/api-rules/violation_exceptions.list
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@@ -57,6 +57,7 @@ API rule violation: names_match,k8s.io/api/resource/v1alpha2,NamedResourcesAttri
API rule violation: names_match,k8s.io/api/resource/v1alpha2,NamedResourcesAttributeValue,QuantityValue
API rule violation: names_match,k8s.io/api/resource/v1alpha2,NamedResourcesAttributeValue,StringSliceValue
API rule violation: names_match,k8s.io/api/resource/v1alpha2,NamedResourcesAttributeValue,StringValue
API rule violation: names_match,k8s.io/api/resource/v1alpha2,NamedResourcesAttributeValue,VersionValue
API rule violation: names_match,k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1,JSONSchemaProps,Ref
API rule violation: names_match,k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1,JSONSchemaProps,Schema
API rule violation: names_match,k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1,JSONSchemaProps,XEmbeddedResource