121 lines
3.4 KiB
Go
121 lines
3.4 KiB
Go
/*
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Copyright 2022 The Karmada 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 store
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import (
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"sync"
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"k8s.io/apimachinery/pkg/api/meta"
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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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"k8s.io/client-go/dynamic"
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"k8s.io/klog/v2"
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)
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// clusterCache caches resources for single member cluster
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type clusterCache struct {
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lock sync.RWMutex
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cache map[schema.GroupVersionResource]*resourceCache
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clusterName string
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restMapper meta.RESTMapper
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// newClientFunc returns a dynamic client for member cluster apiserver
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newClientFunc func() (dynamic.Interface, error)
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}
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func newClusterCache(clusterName string, newClientFunc func() (dynamic.Interface, error), restMapper meta.RESTMapper) *clusterCache {
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return &clusterCache{
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clusterName: clusterName,
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newClientFunc: newClientFunc,
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restMapper: restMapper,
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cache: map[schema.GroupVersionResource]*resourceCache{},
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}
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}
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func (c *clusterCache) updateCache(resources map[schema.GroupVersionResource]*MultiNamespace) error {
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c.lock.Lock()
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defer c.lock.Unlock()
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// remove non-exist resources
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for resource, cache := range c.cache {
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if multiNS, exist := resources[resource]; !exist || !multiNS.Equal(cache.multiNS) {
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klog.Infof("Remove cache for %s %s", c.clusterName, resource.String())
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c.cache[resource].stop()
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delete(c.cache, resource)
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}
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}
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// add resource cache
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for resource, multiNS := range resources {
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_, exist := c.cache[resource]
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if !exist {
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kind, err := c.restMapper.KindFor(resource)
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if err != nil {
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return err
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}
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mapping, err := c.restMapper.RESTMapping(kind.GroupKind(), kind.Version)
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if err != nil {
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return err
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}
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namespaced := mapping.Scope.Name() == meta.RESTScopeNameNamespace
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if !namespaced && !multiNS.allNamespaces {
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klog.Warningf("Namespace is invalid for %v, skip it.", kind.String())
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multiNS.Add(metav1.NamespaceAll)
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}
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singularName, err := c.restMapper.ResourceSingularizer(resource.Resource)
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if err != nil {
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klog.Warningf("Failed to get singular name for resource: %s", resource.String())
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return err
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}
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klog.Infof("Add cache for %s %s", c.clusterName, resource.String())
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cache, err := newResourceCache(c.clusterName, resource, kind, singularName, namespaced, multiNS, c.clientForResourceFunc(resource))
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if err != nil {
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return err
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}
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c.cache[resource] = cache
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}
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}
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return nil
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}
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func (c *clusterCache) stop() {
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c.lock.RLock()
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defer c.lock.RUnlock()
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for _, cache := range c.cache {
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cache.stop()
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}
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}
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func (c *clusterCache) clientForResourceFunc(resource schema.GroupVersionResource) func() (dynamic.NamespaceableResourceInterface, error) {
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return func() (dynamic.NamespaceableResourceInterface, error) {
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client, err := c.newClientFunc()
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if err != nil {
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return nil, err
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}
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return client.Resource(resource), nil
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}
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}
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func (c *clusterCache) cacheForResource(gvr schema.GroupVersionResource) *resourceCache {
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c.lock.RLock()
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defer c.lock.RUnlock()
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return c.cache[gvr]
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}
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