mirror of
https://github.com/kubernetes/node-problem-detector.git
synced 2026-02-28 00:34:23 +00:00
90 lines
2.3 KiB
Go
90 lines
2.3 KiB
Go
/*
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Copyright 2016 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 problemdetector
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import (
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"fmt"
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"github.com/golang/glog"
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"k8s.io/node-problem-detector/pkg/types"
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)
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// ProblemDetector collects statuses from all problem daemons and update the node condition and send node event.
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type ProblemDetector interface {
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Run() error
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}
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type problemDetector struct {
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monitors []types.Monitor
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exporters []types.Exporter
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}
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// NewProblemDetector creates the problem detector. Currently we just directly passed in the problem daemons, but
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// in the future we may want to let the problem daemons register themselves.
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func NewProblemDetector(monitors []types.Monitor, exporters []types.Exporter) ProblemDetector {
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return &problemDetector{
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monitors: monitors,
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exporters: exporters,
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}
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}
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// Run starts the problem detector.
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func (p *problemDetector) Run() error {
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// Start the log monitors one by one.
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var chans []<-chan *types.Status
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failureCount := 0
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for _, m := range p.monitors {
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ch, err := m.Start()
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if err != nil {
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// Do not return error and keep on trying the following config files.
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glog.Errorf("Failed to start problem daemon %v: %v", m, err)
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failureCount += 1
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continue
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}
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if ch != nil {
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chans = append(chans, ch)
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}
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}
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if len(p.monitors) == failureCount {
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return fmt.Errorf("no problem daemon is successfully setup")
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}
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ch := groupChannel(chans)
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glog.Info("Problem detector started")
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for {
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select {
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case status := <-ch:
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for _, exporter := range p.exporters {
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exporter.ExportProblems(status)
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}
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}
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}
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}
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func groupChannel(chans []<-chan *types.Status) <-chan *types.Status {
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statuses := make(chan *types.Status)
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for _, ch := range chans {
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go func(c <-chan *types.Status) {
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for status := range c {
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statuses <- status
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}
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}(ch)
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}
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return statuses
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}
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