mirror of
https://github.com/kubernetes/node-problem-detector.git
synced 2026-02-14 09:59:56 +00:00
98 lines
2.5 KiB
Go
98 lines
2.5 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 main
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import (
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"flag"
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"fmt"
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"strings"
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"time"
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"github.com/spf13/pflag"
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"k8s.io/klog/v2"
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"k8s.io/node-problem-detector/test/e2e/problemmaker/makers"
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)
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type options struct {
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// Command line options. See flag descriptions for the description
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Rate float32
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Duration time.Duration
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Problem string
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}
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// AddFlags adds log counter command line options to pflag.
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func (o *options) AddFlags(fs *pflag.FlagSet) {
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fs.Float32Var(&o.Rate, "rate", 1.0,
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"Number of times the problem should be generated per second")
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fs.DurationVar(&o.Duration, "duration", time.Duration(1)*time.Second,
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"Duration for problem maker to keep generating problems")
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problems := makers.GetProblemTypes()
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fs.StringVar(&o.Problem, "problem", "",
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fmt.Sprintf("The type of problem to be generated. Supported types: %q",
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strings.Join(problems, ", ")))
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}
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func main() {
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klogFlags := flag.NewFlagSet("klog", flag.ExitOnError)
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klog.InitFlags(klogFlags)
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klogFlags.VisitAll(func(f *flag.Flag) {
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switch f.Name {
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case "v", "vmodule", "logtostderr":
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flag.CommandLine.Var(f.Value, f.Name, f.Usage)
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}
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})
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pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
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pflag.CommandLine.MarkHidden("vmodule")
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pflag.CommandLine.MarkHidden("logtostderr")
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o := options{}
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o.AddFlags(pflag.CommandLine)
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pflag.Parse()
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if o.Problem == "" {
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klog.Fatalf("Please specify the type of problem to make using the --problem argument.")
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}
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problemGenerator, ok := makers.ProblemGenerators[o.Problem]
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if !ok {
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klog.Fatalf("Expected to see a problem type of one of %q, but got %q.",
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makers.GetProblemTypes(), o.Problem)
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}
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periodMilli := int(1000.0 / o.Rate)
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ticker := time.NewTicker(time.Duration(periodMilli) * time.Millisecond)
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defer ticker.Stop()
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done := make(chan bool)
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go func() {
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time.Sleep(o.Duration)
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done <- true
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}()
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for {
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select {
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case <-done:
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return
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case <-ticker.C:
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klog.Infof("Generating problem: %q", o.Problem)
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problemGenerator()
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}
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}
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}
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