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moby--moby/contrib/crashTest.go

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package main
import (
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"fmt"
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"io"
"log"
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"net"
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"os"
"os/exec"
"path"
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"time"
)
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var DOCKERPATH = path.Join(os.Getenv("DOCKERPATH"), "docker")
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// WARNING: this crashTest will 1) crash your host, 2) remove all containers
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func runDaemon() (*exec.Cmd, error) {
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os.Remove("/var/run/docker.pid")
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exec.Command("rm", "-rf", "/var/lib/docker/containers").Run()
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cmd := exec.Command(DOCKERPATH, "-d")
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outPipe, err := cmd.StdoutPipe()
if err != nil {
return nil, err
}
errPipe, err := cmd.StderrPipe()
if err != nil {
return nil, err
}
if err := cmd.Start(); err != nil {
return nil, err
}
go func() {
io.Copy(os.Stdout, outPipe)
}()
go func() {
io.Copy(os.Stderr, errPipe)
}()
return cmd, nil
}
func crashTest() error {
if err := exec.Command("/bin/bash", "-c", "while true; do true; done").Start(); err != nil {
return err
}
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var endpoint string
if ep := os.Getenv("TEST_ENDPOINT"); ep == "" {
endpoint = "192.168.56.1:7979"
} else {
endpoint = ep
}
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c := make(chan bool)
var conn io.Writer
go func() {
conn, _ = net.Dial("tcp", endpoint)
c <- false
}()
go func() {
time.Sleep(2 * time.Second)
c <- true
}()
<-c
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restartCount := 0
totalTestCount := 1
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for {
daemon, err := runDaemon()
if err != nil {
return err
}
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restartCount++
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// time.Sleep(5000 * time.Millisecond)
var stop bool
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go func() error {
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stop = false
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for i := 0; i < 100 && !stop; {
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func() error {
cmd := exec.Command(DOCKERPATH, "run", "ubuntu", "echo", fmt.Sprintf("%d", totalTestCount))
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i++
totalTestCount++
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outPipe, err := cmd.StdoutPipe()
if err != nil {
return err
}
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inPipe, err := cmd.StdinPipe()
if err != nil {
return err
}
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if err := cmd.Start(); err != nil {
return err
}
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if conn != nil {
go io.Copy(conn, outPipe)
}
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// Expecting error, do not check
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inPipe.Write([]byte("hello world!!!!!\n"))
go inPipe.Write([]byte("hello world!!!!!\n"))
go inPipe.Write([]byte("hello world!!!!!\n"))
inPipe.Close()
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if err := cmd.Wait(); err != nil {
return err
}
outPipe.Close()
return nil
}()
}
return nil
}()
time.Sleep(20 * time.Second)
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stop = true
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if err := daemon.Process.Kill(); err != nil {
return err
}
}
}
func main() {
if err := crashTest(); err != nil {
log.Println(err)
}
}