func (cli *DaemonCli) start(opts daemonOptions) (err error) {
stopc := make(chan bool)
defer close(stopc)
// warn from uuid package when running the daemon
uuid.Loggerf = logrus.Warnf
opts.common.SetDefaultOptions(opts.flags)
if opts.common.TrustKey == "" {
opts.common.TrustKey = filepath.Join(
getDaemonConfDir(),
cliflags.DefaultTrustKeyFile)
}
if cli.Config, err = loadDaemonCliConfig(opts); err != nil {
return err
}
cli.configFile = &opts.configFile
cli.flags = opts.flags
if cli.Config.Debug {
utils.EnableDebug()
}
if utils.ExperimentalBuild() {
logrus.Warn("Running experimental build")
}
logrus.SetFormatter(&logrus.TextFormatter{
TimestampFormat: jsonlog.RFC3339NanoFixed,
DisableColors: cli.Config.RawLogs,
})
if err := setDefaultUmask(); err != nil {
return fmt.Errorf("Failed to set umask: %v", err)
}
if len(cli.LogConfig.Config) > 0 {
if err := logger.ValidateLogOpts(cli.LogConfig.Type, cli.LogConfig.Config); err != nil {
return fmt.Errorf("Failed to set log opts: %v", err)
}
}
if cli.Pidfile != "" {
pf, err := pidfile.New(cli.Pidfile)
if err != nil {
return fmt.Errorf("Error starting daemon: %v", err)
}
defer func() {
if err := pf.Remove(); err != nil {
logrus.Error(err)
}
}()
}
serverConfig := &apiserver.Config{
Logging: true,
SocketGroup: cli.Config.SocketGroup,
Version: dockerversion.Version,
EnableCors: cli.Config.EnableCors,
CorsHeaders: cli.Config.CorsHeaders,
}
if cli.Config.TLS {
tlsOptions := tlsconfig.Options{
CAFile: cli.Config.CommonTLSOptions.CAFile,
CertFile: cli.Config.CommonTLSOptions.CertFile,
KeyFile: cli.Config.CommonTLSOptions.KeyFile,
}
if cli.Config.TLSVerify {
// server requires and verifies client's certificate
tlsOptions.ClientAuth = tls.RequireAndVerifyClientCert
}
tlsConfig, err := tlsconfig.Server(tlsOptions)
if err != nil {
return err
}
serverConfig.TLSConfig = tlsConfig
}
if len(cli.Config.Hosts) == 0 {
cli.Config.Hosts = make([]string, 1)
}
api := apiserver.New(serverConfig)
cli.api = api
for i := 0; i < len(cli.Config.Hosts); i++ {
var err error
if cli.Config.Hosts[i], err = dopts.ParseHost(cli.Config.TLS, cli.Config.Hosts[i]); err != nil {
return fmt.Errorf("error parsing -H %s : %v", cli.Config.Hosts[i], err)
}
protoAddr := cli.Config.Hosts[i]
protoAddrParts := strings.SplitN(protoAddr, "://", 2)
if len(protoAddrParts) != 2 {
return fmt.Errorf("bad format %s, expected PROTO://ADDR", protoAddr)
}
proto := protoAddrParts[0]
addr := protoAddrParts[1]
// It's a bad idea to bind to TCP without tlsverify.
if proto == "tcp" && (serverConfig.TLSConfig == nil || serverConfig.TLSConfig.ClientAuth != tls.RequireAndVerifyClientCert) {
logrus.Warn("[!] DON'T BIND ON ANY IP ADDRESS WITHOUT setting -tlsverify IF YOU DON'T KNOW WHAT YOU'RE DOING [!]")
}
ls, err := listeners.Init(proto, addr, serverConfig.SocketGroup, serverConfig.TLSConfig)
if err != nil {
return err
}
ls = wrapListeners(proto, ls)
// If we're binding to a TCP port, make sure that a container doesn't try to use it.
if proto == "tcp" {
if err := allocateDaemonPort(addr); err != nil {
return err
}
}
logrus.Debugf("Listener created for HTTP on %s (%s)", proto, addr)
api.Accept(addr, ls...)
}
if err := migrateKey(); err != nil {
return err
}
// FIXME: why is this down here instead of with the other TrustKey logic above?
cli.TrustKeyPath = opts.common.TrustKey
registryService := registry.NewService(cli.Config.ServiceOptions)
containerdRemote, err := libcontainerd.New(cli.getLibcontainerdRoot(), cli.getPlatformRemoteOptions()...)
if err != nil {
return err
}
signal.Trap(func() {
cli.stop()
<-stopc // wait for daemonCli.start() to return
})
d, err := daemon.NewDaemon(cli.Config, registryService, containerdRemote)
if err != nil {
return fmt.Errorf("Error starting daemon: %v", err)
}
name, _ := os.Hostname()
c, err := cluster.New(cluster.Config{
Root: cli.Config.Root,
Name: name,
Backend: d,
NetworkSubnetsProvider: d,
DefaultAdvertiseAddr: cli.Config.SwarmDefaultAdvertiseAddr,
RuntimeRoot: cli.getSwarmRunRoot(),
})
if err != nil {
logrus.Fatalf("Error creating cluster component: %v", err)
}
// Restart all autostart containers which has a swarm endpoint
// and is not yet running now that we have successfully
// initialized the cluster.
d.RestartSwarmContainers()
logrus.Info("Daemon has completed initialization")
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.GraphDriverName(),
}).Info("Docker daemon")
cli.d = d
// initMiddlewares needs cli.d to be populated. Dont change this init order.
cli.initMiddlewares(api, serverConfig)
initRouter(api, d, c)
cli.setupConfigReloadTrap()
// The serve API routine never exits unless an error occurs
// We need to start it as a goroutine and wait on it so
// daemon doesn't exit
serveAPIWait := make(chan error)
go api.Wait(serveAPIWait)
// after the daemon is done setting up we can notify systemd api
notifySystem()
// Daemon is fully initialized and handling API traffic
// Wait for serve API to complete
errAPI := <-serveAPIWait
c.Cleanup()
shutdownDaemon(d)
containerdRemote.Cleanup()
if errAPI != nil {
return fmt.Errorf("Shutting down due to ServeAPI error: %v", errAPI)
}
return nil
}
// CmdDaemon is the daemon command, called the raw arguments after `docker daemon`.
func (cli *DaemonCli) CmdDaemon(args ...string) error {
// warn from uuid package when running the daemon
uuid.Loggerf = logrus.Warnf
if !commonFlags.FlagSet.IsEmpty() || !clientFlags.FlagSet.IsEmpty() {
// deny `docker -D daemon`
illegalFlag := getGlobalFlag()
fmt.Fprintf(os.Stderr, "invalid flag '-%s'.\nSee 'docker daemon --help'.\n", illegalFlag.Names[0])
os.Exit(1)
} else {
// allow new form `docker daemon -D`
flag.Merge(cli.flags, commonFlags.FlagSet)
}
configFile := cli.flags.String([]string{daemonConfigFileFlag}, defaultDaemonConfigFile, "Daemon configuration file")
cli.flags.ParseFlags(args, true)
commonFlags.PostParse()
if commonFlags.TrustKey == "" {
commonFlags.TrustKey = filepath.Join(getDaemonConfDir(), defaultTrustKeyFile)
}
cliConfig, err := loadDaemonCliConfig(cli.Config, cli.flags, commonFlags, *configFile)
if err != nil {
fmt.Fprint(os.Stderr, err)
os.Exit(1)
}
cli.Config = cliConfig
if cli.Config.Debug {
utils.EnableDebug()
}
if utils.ExperimentalBuild() {
logrus.Warn("Running experimental build")
}
logrus.SetFormatter(&logrus.TextFormatter{
TimestampFormat: jsonlog.RFC3339NanoFixed,
DisableColors: cli.Config.RawLogs,
})
if err := setDefaultUmask(); err != nil {
logrus.Fatalf("Failed to set umask: %v", err)
}
if len(cli.LogConfig.Config) > 0 {
if err := logger.ValidateLogOpts(cli.LogConfig.Type, cli.LogConfig.Config); err != nil {
logrus.Fatalf("Failed to set log opts: %v", err)
}
}
var pfile *pidfile.PIDFile
if cli.Pidfile != "" {
pf, err := pidfile.New(cli.Pidfile)
if err != nil {
logrus.Fatalf("Error starting daemon: %v", err)
}
pfile = pf
defer func() {
if err := pfile.Remove(); err != nil {
logrus.Error(err)
}
}()
}
serverConfig := &apiserver.Config{
Logging: true,
SocketGroup: cli.Config.SocketGroup,
Version: dockerversion.Version,
}
serverConfig = setPlatformServerConfig(serverConfig, cli.Config)
if cli.Config.TLS {
tlsOptions := tlsconfig.Options{
CAFile: cli.Config.CommonTLSOptions.CAFile,
CertFile: cli.Config.CommonTLSOptions.CertFile,
KeyFile: cli.Config.CommonTLSOptions.KeyFile,
}
if cli.Config.TLSVerify {
// server requires and verifies client's certificate
tlsOptions.ClientAuth = tls.RequireAndVerifyClientCert
}
tlsConfig, err := tlsconfig.Server(tlsOptions)
if err != nil {
logrus.Fatal(err)
}
serverConfig.TLSConfig = tlsConfig
}
if len(cli.Config.Hosts) == 0 {
cli.Config.Hosts = make([]string, 1)
}
api := apiserver.New(serverConfig)
for i := 0; i < len(cli.Config.Hosts); i++ {
var err error
if cli.Config.Hosts[i], err = opts.ParseHost(cli.Config.TLS, cli.Config.Hosts[i]); err != nil {
logrus.Fatalf("error parsing -H %s : %v", cli.Config.Hosts[i], err)
}
protoAddr := cli.Config.Hosts[i]
protoAddrParts := strings.SplitN(protoAddr, "://", 2)
if len(protoAddrParts) != 2 {
logrus.Fatalf("bad format %s, expected PROTO://ADDR", protoAddr)
}
proto := protoAddrParts[0]
addr := protoAddrParts[1]
// It's a bad idea to bind to TCP without tlsverify.
if proto == "tcp" && (serverConfig.TLSConfig == nil || serverConfig.TLSConfig.ClientAuth != tls.RequireAndVerifyClientCert) {
logrus.Warn("[!] DON'T BIND ON ANY IP ADDRESS WITHOUT setting -tlsverify IF YOU DON'T KNOW WHAT YOU'RE DOING [!]")
}
l, err := listeners.Init(proto, addr, serverConfig.SocketGroup, serverConfig.TLSConfig)
if err != nil {
logrus.Fatal(err)
}
// If we're binding to a TCP port, make sure that a container doesn't try to use it.
if proto == "tcp" {
if err := allocateDaemonPort(addr); err != nil {
logrus.Fatal(err)
}
}
logrus.Debugf("Listener created for HTTP on %s (%s)", protoAddrParts[0], protoAddrParts[1])
api.Accept(protoAddrParts[1], l...)
}
if err := migrateKey(); err != nil {
logrus.Fatal(err)
}
cli.TrustKeyPath = commonFlags.TrustKey
registryService := registry.NewService(cli.Config.ServiceOptions)
containerdRemote, err := libcontainerd.New(cli.getLibcontainerdRoot(), cli.getPlatformRemoteOptions()...)
if err != nil {
logrus.Fatal(err)
}
d, err := daemon.NewDaemon(cli.Config, registryService, containerdRemote)
if err != nil {
if pfile != nil {
if err := pfile.Remove(); err != nil {
logrus.Error(err)
}
}
logrus.Fatalf("Error starting daemon: %v", err)
}
logrus.Info("Daemon has completed initialization")
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.GraphDriverName(),
}).Info("Docker daemon")
cli.initMiddlewares(api, serverConfig)
initRouter(api, d)
reload := func(config *daemon.Config) {
if err := d.Reload(config); err != nil {
logrus.Errorf("Error reconfiguring the daemon: %v", err)
return
}
if config.IsValueSet("debug") {
debugEnabled := utils.IsDebugEnabled()
switch {
case debugEnabled && !config.Debug: // disable debug
utils.DisableDebug()
api.DisableProfiler()
case config.Debug && !debugEnabled: // enable debug
utils.EnableDebug()
api.EnableProfiler()
}
}
}
setupConfigReloadTrap(*configFile, cli.flags, reload)
// The serve API routine never exits unless an error occurs
// We need to start it as a goroutine and wait on it so
// daemon doesn't exit
serveAPIWait := make(chan error)
go api.Wait(serveAPIWait)
signal.Trap(func() {
api.Close()
<-serveAPIWait
shutdownDaemon(d, 15)
if pfile != nil {
if err := pfile.Remove(); err != nil {
logrus.Error(err)
}
}
})
// after the daemon is done setting up we can notify systemd api
notifySystem()
// Daemon is fully initialized and handling API traffic
// Wait for serve API to complete
errAPI := <-serveAPIWait
shutdownDaemon(d, 15)
containerdRemote.Cleanup()
if errAPI != nil {
if pfile != nil {
if err := pfile.Remove(); err != nil {
logrus.Error(err)
}
}
logrus.Fatalf("Shutting down due to ServeAPI error: %v", errAPI)
}
return nil
}