func main() {
mflag.Parse()
if *flVersion {
showVersion()
return
}
if *flHelp {
mflag.Usage()
return
}
if *flDebug {
logrus.SetLevel(logrus.DebugLevel)
}
if len(*flRuntime) != 0 {
if *flRuntime != opts.DEFAULTRUNTIME && *flRuntime != opts.RKTRUNTIME {
fmt.Println("Invalid container runtime")
return
}
}
if len(flHosts) == 0 {
defaultHost := fmt.Sprintf("unix://%s", opts.DEFAULTUNIXSOCKET)
flHosts = append(flHosts, defaultHost)
}
_, ok := exec.LookPath("docker")
if ok != nil {
logrus.Fatal("Can't find docker")
}
if *flDaemon {
mainDaemon()
return
}
if len(flHosts) > 1 {
fmt.Fprintf(os.Stderr, "Please specify only one -H")
os.Exit(0)
}
// If no flag specified, print help info.
mflag.Usage()
}
func mainDaemon() {
if mflag.NArg() != 0 {
mflag.Usage()
return
}
if len(*flDockerSock) == 0 {
engine.DockerSock = opts.DEFAULTDOCKERSOCKET
} else {
engine.DockerSock = *flDockerSock
}
RuntimeType := engine.RuntimeDocker
if len(*flRuntime) != 0 && *flRuntime == opts.RKTRUNTIME {
RuntimeType = engine.RuntimeRkt
}
if len(*flGroup) > 0 {
engine.SocketGroup = *flGroup
}
eng := engine.New(RuntimeType)
//catch signals
trap.SignalsHandler(trap.Shutdown)
var srv *server.Server
srv = server.New(eng, false)
serverWait := make(chan error)
go func() {
if err := srv.CreateServer(eng, flHosts); err != nil {
logrus.Errorf("Server error: %v", err)
serverWait <- err
return
}
serverWait <- nil
}()
err := <-serverWait
if err != nil {
logrus.Fatalf("Shutting down due to Server error: %v", err)
}
<-trap.CleanupDone
}