mirror of
https://github.com/kubernetes/node-problem-detector.git
synced 2026-02-28 00:34:23 +00:00
113 lines
2.9 KiB
Go
113 lines
2.9 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors 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 systemstatsmonitor
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import (
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"encoding/json"
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"io/ioutil"
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"time"
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"github.com/golang/glog"
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"k8s.io/node-problem-detector/pkg/problemdaemon"
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ssmtypes "k8s.io/node-problem-detector/pkg/systemstatsmonitor/types"
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"k8s.io/node-problem-detector/pkg/types"
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"k8s.io/node-problem-detector/pkg/util/tomb"
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)
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const SystemStatsMonitorName = "system-stats-monitor"
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func init() {
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problemdaemon.Register(SystemStatsMonitorName, types.ProblemDaemonHandler{
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CreateProblemDaemonOrDie: NewSystemStatsMonitorOrDie,
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CmdOptionDescription: "Set to config file paths."})
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}
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type systemStatsMonitor struct {
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config ssmtypes.SystemStatsConfig
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diskCollector *diskCollector
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tomb *tomb.Tomb
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}
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// NewSystemStatsMonitorOrDie creates a system stats monitor.
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func NewSystemStatsMonitorOrDie(configPath string) types.Monitor {
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ssm := systemStatsMonitor{
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tomb: tomb.NewTomb(),
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}
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// Apply configurations.
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f, err := ioutil.ReadFile(configPath)
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if err != nil {
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glog.Fatalf("Failed to read configuration file %q: %v", configPath, err)
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}
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err = json.Unmarshal(f, &ssm.config)
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if err != nil {
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glog.Fatalf("Failed to unmarshal configuration file %q: %v", configPath, err)
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}
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err = ssm.config.ApplyConfiguration()
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if err != nil {
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glog.Fatalf("Failed to apply configuration for %q: %v", configPath, err)
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}
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err = ssm.config.Validate()
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if err != nil {
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glog.Fatalf("Failed to validate configuration %+v: %v", ssm.config, err)
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}
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// Initialize diskCollector if needed.
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if len(ssm.config.DiskConfig.MetricsConfigs) > 0 {
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ssm.diskCollector = NewDiskCollectorOrDie(&ssm.config.DiskConfig)
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}
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return &ssm
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}
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func (ssm *systemStatsMonitor) Start() (<-chan *types.Status, error) {
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glog.Info("Start system stats monitor")
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go ssm.monitorLoop()
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return nil, nil
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}
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func (ssm *systemStatsMonitor) monitorLoop() {
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defer ssm.tomb.Done()
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runTicker := time.NewTicker(ssm.config.InvokeInterval)
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defer runTicker.Stop()
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select {
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case <-ssm.tomb.Stopping():
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glog.Infof("System stats monitor stopped")
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return
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default:
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ssm.diskCollector.collect()
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}
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for {
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select {
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case <-runTicker.C:
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ssm.diskCollector.collect()
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case <-ssm.tomb.Stopping():
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glog.Infof("System stats monitor stopped")
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return
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}
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}
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}
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func (ssm *systemStatsMonitor) Stop() {
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glog.Info("Stop system stats monitor")
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ssm.tomb.Stop()
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}
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