mirror of
https://github.com/ceph/ceph-csi.git
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71925d553e
Bumping the k8s.io dependencies to v0.26.7. The main intention is to update the client-go library dependency for kube 1.27+, where aggregated discovery is enabled. With client-go lower than v0.26.4 in some cases it is possible that the discovery response comes with the malformed response with nil GVK leading to Crash Loop Back Off state. Upstream kubernetes issue: https://github.com/kubernetes/kubernetes/pull/116603 Signed-off-by: karthik-us <ksubrahm@redhat.com>
155 lines
5.7 KiB
Go
155 lines
5.7 KiB
Go
/*
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Copyright 2022 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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package discovery
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import (
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"fmt"
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apidiscovery "k8s.io/api/apidiscovery/v2beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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// StaleGroupVersionError encasulates failed GroupVersion marked "stale"
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// in the returned AggregatedDiscovery format.
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type StaleGroupVersionError struct {
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gv schema.GroupVersion
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}
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func (s StaleGroupVersionError) Error() string {
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return fmt.Sprintf("stale GroupVersion discovery: %v", s.gv)
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}
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// SplitGroupsAndResources transforms "aggregated" discovery top-level structure into
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// the previous "unaggregated" discovery groups and resources.
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func SplitGroupsAndResources(aggregatedGroups apidiscovery.APIGroupDiscoveryList) (
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*metav1.APIGroupList,
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map[schema.GroupVersion]*metav1.APIResourceList,
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map[schema.GroupVersion]error) {
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// Aggregated group list will contain the entirety of discovery, including
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// groups, versions, and resources. GroupVersions marked "stale" are failed.
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groups := []*metav1.APIGroup{}
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failedGVs := map[schema.GroupVersion]error{}
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resourcesByGV := map[schema.GroupVersion]*metav1.APIResourceList{}
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for _, aggGroup := range aggregatedGroups.Items {
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group, resources, failed := convertAPIGroup(aggGroup)
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groups = append(groups, group)
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for gv, resourceList := range resources {
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resourcesByGV[gv] = resourceList
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}
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for gv, err := range failed {
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failedGVs[gv] = err
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}
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}
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// Transform slice of groups to group list before returning.
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groupList := &metav1.APIGroupList{}
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groupList.Groups = make([]metav1.APIGroup, 0, len(groups))
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for _, group := range groups {
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groupList.Groups = append(groupList.Groups, *group)
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}
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return groupList, resourcesByGV, failedGVs
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}
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// convertAPIGroup tranforms an "aggregated" APIGroupDiscovery to an "legacy" APIGroup,
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// also returning the map of APIResourceList for resources within GroupVersions.
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func convertAPIGroup(g apidiscovery.APIGroupDiscovery) (
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*metav1.APIGroup,
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map[schema.GroupVersion]*metav1.APIResourceList,
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map[schema.GroupVersion]error) {
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// Iterate through versions to convert to group and resources.
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group := &metav1.APIGroup{}
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gvResources := map[schema.GroupVersion]*metav1.APIResourceList{}
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failedGVs := map[schema.GroupVersion]error{}
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group.Name = g.ObjectMeta.Name
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for _, v := range g.Versions {
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gv := schema.GroupVersion{Group: g.Name, Version: v.Version}
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if v.Freshness == apidiscovery.DiscoveryFreshnessStale {
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failedGVs[gv] = StaleGroupVersionError{gv: gv}
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continue
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}
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version := metav1.GroupVersionForDiscovery{}
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version.GroupVersion = gv.String()
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version.Version = v.Version
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group.Versions = append(group.Versions, version)
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// PreferredVersion is first non-stale Version
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if group.PreferredVersion == (metav1.GroupVersionForDiscovery{}) {
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group.PreferredVersion = version
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}
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resourceList := &metav1.APIResourceList{}
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resourceList.GroupVersion = gv.String()
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for _, r := range v.Resources {
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resource, err := convertAPIResource(r)
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if err == nil {
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resourceList.APIResources = append(resourceList.APIResources, resource)
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}
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// Subresources field in new format get transformed into full APIResources.
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// It is possible a partial result with an error was returned to be used
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// as the parent resource for the subresource.
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for _, subresource := range r.Subresources {
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sr, err := convertAPISubresource(resource, subresource)
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if err == nil {
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resourceList.APIResources = append(resourceList.APIResources, sr)
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}
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}
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}
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gvResources[gv] = resourceList
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}
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return group, gvResources, failedGVs
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}
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// convertAPIResource tranforms a APIResourceDiscovery to an APIResource. We are
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// resilient to missing GVK, since this resource might be the parent resource
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// for a subresource. If the parent is missing a GVK, it is not returned in
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// discovery, and the subresource MUST have the GVK.
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func convertAPIResource(in apidiscovery.APIResourceDiscovery) (metav1.APIResource, error) {
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result := metav1.APIResource{
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Name: in.Resource,
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SingularName: in.SingularResource,
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Namespaced: in.Scope == apidiscovery.ScopeNamespace,
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Verbs: in.Verbs,
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ShortNames: in.ShortNames,
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Categories: in.Categories,
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}
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var err error
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if in.ResponseKind != nil {
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result.Group = in.ResponseKind.Group
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result.Version = in.ResponseKind.Version
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result.Kind = in.ResponseKind.Kind
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} else {
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err = fmt.Errorf("discovery resource %s missing GVK", in.Resource)
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}
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// Can return partial result with error, which can be the parent for a
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// subresource. Do not add this result to the returned discovery resources.
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return result, err
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}
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// convertAPISubresource tranforms a APISubresourceDiscovery to an APIResource.
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func convertAPISubresource(parent metav1.APIResource, in apidiscovery.APISubresourceDiscovery) (metav1.APIResource, error) {
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result := metav1.APIResource{}
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if in.ResponseKind == nil {
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return result, fmt.Errorf("subresource %s/%s missing GVK", parent.Name, in.Subresource)
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}
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result.Name = fmt.Sprintf("%s/%s", parent.Name, in.Subresource)
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result.SingularName = parent.SingularName
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result.Namespaced = parent.Namespaced
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result.Group = in.ResponseKind.Group
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result.Version = in.ResponseKind.Version
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result.Kind = in.ResponseKind.Kind
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result.Verbs = in.Verbs
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return result, nil
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}
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