68 lines
2.8 KiB
Go
68 lines
2.8 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// This code is lifted from the Kubernetes codebase in order to avoid relying on the k8s.io/kubernetes package.
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// For reference:
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// https://github.com/kubernetes/kubernetes/blob/release-1.23/pkg/controller/garbagecollector/garbagecollector.go#L696-L732
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package lifted
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import (
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/client-go/discovery"
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"k8s.io/klog/v2"
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)
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// +lifted:source=https://github.com/kubernetes/kubernetes/blob/release-1.23/pkg/controller/garbagecollector/garbagecollector.go#L696-L732
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// GetDeletableResources returns all resources from discoveryClient that the
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// garbage collector should recognize and work with. More specifically, all
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// preferred resources which support the 'delete', 'list', and 'watch' verbs.
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//
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// All discovery errors are considered temporary. Upon encountering any error,
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// GetDeletableResources will log and return any discovered resources it was
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// able to process (which may be none).
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func GetDeletableResources(discoveryClient discovery.ServerResourcesInterface) map[schema.GroupVersionResource]struct{} {
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preferredResources, err := discoveryClient.ServerPreferredResources()
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if err != nil {
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if discovery.IsGroupDiscoveryFailedError(err) {
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klog.Warningf("failed to discover some groups: %v", err.(*discovery.ErrGroupDiscoveryFailed).Groups)
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} else {
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klog.Warningf("failed to discover preferred resources: %v", err)
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}
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}
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if preferredResources == nil {
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return map[schema.GroupVersionResource]struct{}{}
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}
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// This is extracted from discovery.GroupVersionResources to allow tolerating
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// failures on a per-resource basis.
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deletableResources := discovery.FilteredBy(discovery.SupportsAllVerbs{Verbs: []string{"delete", "list", "watch"}}, preferredResources)
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deletableGroupVersionResources := map[schema.GroupVersionResource]struct{}{}
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for _, rl := range deletableResources {
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gv, err := schema.ParseGroupVersion(rl.GroupVersion)
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if err != nil {
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klog.Warningf("ignoring invalid discovered resource %q: %v", rl.GroupVersion, err)
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continue
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}
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for i := range rl.APIResources {
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deletableGroupVersionResources[schema.GroupVersionResource{Group: gv.Group, Version: gv.Version, Resource: rl.APIResources[i].Name}] = struct{}{}
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}
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}
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return deletableGroupVersionResources
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}
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