forked from kubewharf/katalyst-core
82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
/*
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Copyright 2022 The Katalyst 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 cnc
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import (
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"context"
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"fmt"
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"sync"
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"time"
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v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/klog/v2"
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"github.com/kubewharf/katalyst-api/pkg/apis/config/v1alpha1"
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configv1alpha1 "github.com/kubewharf/katalyst-api/pkg/client/clientset/versioned/typed/config/v1alpha1"
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)
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type CNCFetcher interface {
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// GetCNC returns latest cnc metadata no deep-copy.
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GetCNC(ctx context.Context) (*v1alpha1.CustomNodeConfig, error)
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}
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type cachedCNCFetcher struct {
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sync.Mutex
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cnc *v1alpha1.CustomNodeConfig
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lastSyncTime time.Time
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nodeName string
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client configv1alpha1.CustomNodeConfigInterface
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syncPeriod time.Duration
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}
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func NewCachedCNCFetcher(nodeName string, syncPeriod time.Duration, client configv1alpha1.CustomNodeConfigInterface) CNCFetcher {
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return &cachedCNCFetcher{
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nodeName: nodeName,
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syncPeriod: syncPeriod,
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client: client,
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}
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}
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func (c *cachedCNCFetcher) GetCNC(ctx context.Context) (*v1alpha1.CustomNodeConfig, error) {
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c.Lock()
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defer c.Unlock()
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now := time.Now()
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if c.lastSyncTime.Add(c.syncPeriod).Before(now) {
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c.syncCNC(ctx)
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c.lastSyncTime = now
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}
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if c.cnc != nil {
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return c.cnc, nil
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}
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return nil, fmt.Errorf("cannot get cnc from cache and remote")
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}
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func (c *cachedCNCFetcher) syncCNC(ctx context.Context) {
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klog.Infof("[cnc] sync cnc from remote")
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cnc, err := c.client.Get(ctx, c.nodeName, v1.GetOptions{ResourceVersion: "0"})
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if err != nil {
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klog.Errorf("syncCNC failed: %v", err)
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return
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}
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c.cnc = cnc
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}
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