9f9e75f508
1) imported glog to third_party (previous commit) 2) add support for third_party/update.sh to update just one pkg 3) search-and-replace: s/log.Printf/glog.Infof/ s/log.Print/glog.Info/ s/log.Fatalf/glog.Fatalf/ s/log.Fatal/glog.Fatal/ 4) convert glog.Info.*, err into glog.Error* Adds some util interfaces to logging and calls them from each cmd, which will set the default log output to write to glog. Pass glog-wrapped Loggers to etcd for logging. Log files will go to /tmp - we should probably follow this up with a default log dir for each cmd. The glog lib is sort of weak in that it only flushes every 30 seconds, so we spin up our own flushing goroutine.
92 lines
2.5 KiB
Go
92 lines
2.5 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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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 master
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import (
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"sync"
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"time"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/registry"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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"github.com/golang/glog"
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)
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// PodCache contains both a cache of container information, as well as the mechanism for keeping
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// that cache up to date.
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type PodCache struct {
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containerInfo client.ContainerInfo
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pods registry.PodRegistry
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podInfo map[string]interface{}
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period time.Duration
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podLock sync.Mutex
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}
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func NewPodCache(info client.ContainerInfo, pods registry.PodRegistry, period time.Duration) *PodCache {
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return &PodCache{
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containerInfo: info,
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pods: pods,
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podInfo: map[string]interface{}{},
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period: period,
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}
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}
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// Implements the ContainerInfo interface
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// The returned value should be treated as read-only
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func (p *PodCache) GetContainerInfo(host, id string) (interface{}, error) {
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p.podLock.Lock()
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defer p.podLock.Unlock()
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value, ok := p.podInfo[id]
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if !ok {
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return nil, nil
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} else {
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return value, nil
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}
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}
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func (p *PodCache) updateContainerInfo(host, id string) error {
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info, err := p.containerInfo.GetContainerInfo(host, id)
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if err != nil {
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return err
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}
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p.podLock.Lock()
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defer p.podLock.Unlock()
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p.podInfo[id] = info
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return nil
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}
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// Update information about all containers. Either called by Loop() below, or one-off.
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func (p *PodCache) UpdateAllContainers() {
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pods, err := p.pods.ListPods(labels.Everything())
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if err != nil {
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glog.Errorf("Error synchronizing container: %#v", err)
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return
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}
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for _, pod := range pods {
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err := p.updateContainerInfo(pod.CurrentState.Host, pod.ID)
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if err != nil {
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glog.Errorf("Error synchronizing container: %#v", err)
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}
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}
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}
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// Loop runs forever, it is expected to be placed in a go routine.
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func (p *PodCache) Loop() {
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util.Forever(func() { p.UpdateAllContainers() }, p.period)
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}
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