func main() {
flag.Var(&flAddrs, "addr", "List of address to KV store")
flag.Parse()
if len(flAddrs) == 0 {
logrus.Fatal("need at least one addr to connect to kv store")
}
if *flDebug {
logrus.SetLevel(logrus.DebugLevel)
}
if _, err := os.Stat(*flHome); err != nil {
if !os.IsNotExist(err) {
logrus.Fatal(err)
}
logrus.Debugf("created home dir at %s", *flHome)
if err := os.MkdirAll(*flHome, 0700); err != nil {
logrus.Fatal(err)
}
}
kvfs := newDriver(*flStore, *flHome, flAddrs.GetAll())
signal.Trap(func() {
kvfs.cleanup()
})
h := volume.NewHandler(kvfs)
if err := h.ServeUnix("root", *flListen); err != nil {
logrus.Fatal(err)
}
}
func main() {
// Get flags
cli, ok := handleFlags()
if !ok {
os.Exit(1)
}
if err := vicbackends.Init(cli.portLayerAddr, productName, &vchConfig); err != nil {
log.Fatalf("failed to initialize backend: %s", err)
}
// Start API server wit options from command line args
api := startServerWithOptions(cli)
setAPIRoutes(api)
serveAPIWait := make(chan error)
go api.Wait(serveAPIWait)
signal.Trap(func() {
api.Close()
})
<-serveAPIWait
}
func mainDaemon() {
if flag.NArg() != 0 {
flag.Usage()
return
}
eng := engine.New()
signal.Trap(eng.Shutdown)
// Load builtins
if err := builtins.Register(eng); err != nil {
log.Fatal(err)
}
// load the daemon in the background so we can immediately start
// the http api so that connections don't fail while the daemon
// is booting
go func() {
d, err := daemon.NewDaemon(daemonCfg, eng)
if err != nil {
log.Fatal(err)
}
if err := d.Install(eng); err != nil {
log.Fatal(err)
}
b := &builder.BuilderJob{eng, d}
b.Install()
// after the daemon is done setting up we can tell the api to start
// accepting connections
if err := eng.Job("acceptconnections").Run(); err != nil {
log.Fatal(err)
}
}()
// TODO actually have a resolved graphdriver to show?
log.Printf("docker daemon: %s %s; execdriver: %s; graphdriver: %s",
dockerversion.VERSION,
dockerversion.GITCOMMIT,
daemonCfg.ExecDriver,
daemonCfg.GraphDriver,
)
// Serve api
job := eng.Job("serveapi", flHosts...)
job.SetenvBool("Logging", true)
job.SetenvBool("EnableCors", *flEnableCors)
job.Setenv("Version", dockerversion.VERSION)
job.Setenv("SocketGroup", *flSocketGroup)
job.SetenvBool("Tls", *flTls)
job.SetenvBool("TlsVerify", *flTlsVerify)
job.Setenv("TlsCa", *flCa)
job.Setenv("TlsCert", *flCert)
job.Setenv("TlsKey", *flKey)
job.Setenv("TrustKey", *flTrustKey)
job.SetenvBool("BufferRequests", true)
if err := job.Run(); err != nil {
log.Fatal(err)
}
}
func main() {
flag.Parse()
logrus.SetLevel(logrus.DebugLevel)
var (
tlsConfig *tls.Config
l net.Listener
err error
dialer rpc.DialerFn
)
if tlsConfig == nil {
l, err = net.Listen("tcp", *flAddr)
dialer = func(addr string, timeout time.Duration) (net.Conn, error) {
return net.DialTimeout("tcp", addr, timeout)
}
} else {
l, err = tls.Listen("tcp", *flAddr, tlsConfig)
d := &net.Dialer{
Timeout: 30 * time.Second,
}
dialer = func(addr string, timeout time.Duration) (net.Conn, error) {
return tls.DialWithDialer(d, "tcp", *flAddr, tlsConfig)
}
}
if err != nil {
logrus.Fatalf("error setting up listener: %v", err)
}
cluster, err := drax.New(l, dialer, *flHome, l.Addr().String(), *flPeer, nil)
if err != nil {
logrus.Fatalf("Error setting up cluster: %v", err)
}
signal.Trap(func() {
logrus.Warn("Shutting down")
cluster.Shutdown()
})
for {
select {
case err := <-cluster.Errors():
if err != nil {
logrus.Error(err)
}
case <-cluster.ShutdownCh():
return
}
}
}
func (c Serve) Run(args []string) int {
var cfgDebug bool
flags := flag.NewFlagSet("serve", flag.ContinueOnError)
flags.Usage = func() { c.Ui.Say(c.Help()) }
flags.BoolVar(&cfgDebug, "debug", false, "")
if err := flags.Parse(args); err != nil {
return 1
}
logrus.SetFormatter(&logrus.TextFormatter{
TimestampFormat: RFC3339NanoFixed,
DisableColors: false,
})
// load up the capabilities.
caps, err := capabilities.Load()
if err != nil {
// TODO log the error.
return 1
}
fmt.Println(caps)
cfg := &server.Config{
Logging: cfgDebug,
Version: "11.33.22",
}
// create a new server
api := server.New(cfg)
logrus.Info("Daemon has completed initialization")
// 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)
})
return 0
}
func main() {
flag.Parse()
logrus.SetLevel(logrus.DebugLevel)
var (
tlsConfig *tls.Config
l net.Listener
err error
)
if tlsConfig == nil {
l, err = net.Listen("tcp", *flAddr)
} else {
l, err = tls.Listen("tcp", *flAddr, tlsConfig)
}
if err != nil {
logrus.Fatalf("error setting up listener: %v", err)
}
cluster, err := raftkv.New(l, *flHome, l.Addr().String(), *flPeer, tlsConfig)
if err != nil {
logrus.Fatalf("Error setting up cluster: %v", err)
}
signal.Trap(func() {
logrus.Warn("Shutting down")
cluster.Shutdown()
})
for {
select {
case err := <-cluster.Errors():
if err != nil {
logrus.Error(err)
}
case <-cluster.ShutdownCh():
return
}
}
}
func main() {
flag.Var(&flAddrs, "addr", "List of address to KV store")
flag.Parse()
if len(flAddrs) == 0 {
logrus.Fatal("need at least one addr to connect to kv store")
}
if *flMountpoint == "" {
logrus.Fatal("invalid mount point, must set the `-to` flag")
}
if _, err := os.Stat(*flMountpoint); err != nil {
logrus.Fatalf("error with specified mountpoint %s: %v", *flMountpoint, err)
}
if *flStore == "" {
logrus.Fatal("must specify a valid KV store")
}
if *flDebug {
logrus.SetLevel(logrus.DebugLevel)
}
fs, err := fs.NewKVFS(fs.Options{*flStore, flAddrs.GetAll(), *flRoot, store.Config{}})
if err != nil {
logrus.Fatal(err)
}
srv, err := fs.NewServer(*flMountpoint)
if err != nil {
logrus.Fatal(err)
}
signal.Trap(func() {
srv.Unmount()
})
srv.Serve()
}
func mainDaemon() {
if utils.ExperimentalBuild() {
logrus.Warn("Running experimental build")
}
if flag.NArg() != 0 {
flag.Usage()
return
}
logrus.SetFormatter(&logrus.TextFormatter{TimestampFormat: timeutils.RFC3339NanoFixed})
if err := setDefaultUmask(); err != nil {
logrus.Fatalf("Failed to set umask: %v", err)
}
var pfile *pidfile.PidFile
if daemonCfg.Pidfile != "" {
pf, err := pidfile.New(daemonCfg.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.ServerConfig{
Logging: true,
EnableCors: daemonCfg.EnableCors,
CorsHeaders: daemonCfg.CorsHeaders,
Version: dockerversion.VERSION,
}
serverConfig = setPlatformServerConfig(serverConfig, daemonCfg)
if *flTls {
if *flTlsVerify {
tlsOptions.ClientAuth = tls.RequireAndVerifyClientCert
}
tlsConfig, err := tlsconfig.Server(tlsOptions)
if err != nil {
logrus.Fatal(err)
}
serverConfig.TLSConfig = tlsConfig
}
api := apiserver.New(serverConfig)
// 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 func() {
if err := api.ServeApi(flHosts); err != nil {
logrus.Errorf("ServeAPI error: %v", err)
serveAPIWait <- err
return
}
serveAPIWait <- nil
}()
if err := migrateKey(); err != nil {
logrus.Fatal(err)
}
daemonCfg.TrustKeyPath = *flTrustKey
registryService := registry.NewService(registryCfg)
d, err := daemon.NewDaemon(daemonCfg, registryService)
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,
"execdriver": d.ExecutionDriver().Name(),
"graphdriver": d.GraphDriver().String(),
}).Info("Docker daemon")
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 tell the api to start
// accepting connections with specified daemon
api.AcceptConnections(d)
// Daemon is fully initialized and handling API traffic
// Wait for serve API to complete
errAPI := <-serveAPIWait
shutdownDaemon(d, 15)
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)
}
}
// 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{
AuthorizationPluginNames: cli.Config.AuthorizationPlugins,
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)
}
l, err := listeners.Init(protoAddrParts[0], protoAddrParts[1], serverConfig.SocketGroup, serverConfig.TLSConfig)
if 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)
d, err := daemon.NewDaemon(cli.Config, registryService)
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,
"execdriver": d.ExecutionDriver().Name(),
"graphdriver": d.GraphDriverName(),
}).Info("Docker daemon")
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)
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
}
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
}
func (cli *DaemonCli) start() {
// warn from uuid package when running the daemon
uuid.Loggerf = logrus.Warnf
flags := flag.CommandLine
cli.commonFlags.PostParse()
if cli.commonFlags.TrustKey == "" {
cli.commonFlags.TrustKey = filepath.Join(getDaemonConfDir(), cliflags.DefaultTrustKeyFile)
}
cliConfig, err := loadDaemonCliConfig(cli.Config, flags, cli.commonFlags, *cli.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 = cli.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(*cli.configFile, 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)
}
}
// 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
//调整一下daemon的启动方式
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")
//匹配配置参数
cli.flags.ParseFlags(args, true)
//配置参数生效
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)
}
}()
}
//定义apiserver的配置，包括认证、日志输出、版本等。
serverConfig := &apiserver.Config{
AuthorizationPluginNames: cli.Config.AuthorizationPlugins,
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)
}
//定义一个新的apiserver。
//apiServer是一个这样的结构(api/server/server.go)：
/*
type Server struct {
cfg *Config
servers []*HTTPServer
routers []router.Router
authZPlugins []authorization.Plugin
routerSwapper *routerSwapper
}
*/
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 parsin
g -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)
}
l, err := listeners.Init(protoAddrParts[0], protoAddrParts[1], serverConfig.SocketGroup, serverConfig.TLSConfig)
if err != nil {
logrus.Fatal(err)
}
logrus.Debugf("Listener created for HTTP on %s (%s)", protoAddrParts[0], protoAddrParts[1])
//初始化api的servers数组，里面放着的都是httpserver类型。此时也没有具体的运行什么
api.Accept(protoAddrParts[1], l...)
}
if err := migrateKey(); err != nil {
logrus.Fatal(err)
}
cli.TrustKeyPath = commonFlags.TrustKey
//创建镜像仓库服务
registryService := registry.NewService(cli.Config.ServiceOptions)
//初始化libcontainer。比如在linux中，就会调用libcontainerd/remote_linux.go中的New方法。
containerdRemote, err := libcontainerd.New(filepath.Join(cli.Config.ExecRoot, "libcontainerd"), cli.getPlatformRemoteOptions()...)
if err != nil {
logrus.Fatal(err)
}
//初始化守护进程使得能够服务。需要输入仓库服务和libcontainerd服务的参数。
//返回的d是Daemon类型：
/*
type Daemon struct {
ID string
repository string
containers container.Store
execCommands *exec.Store
referenceStore reference.Store
downloadManager *xfer.LayerDownloadManager
uploadManager *xfer.LayerUploadManager
distributionMetadataStore dmetadata.Store
trustKey libtrust.PrivateKey
idIndex *truncindex.TruncIndex
configStore *Config
statsCollector *statsCollector
defaultLogConfig containertypes.LogConfig
RegistryService *registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *store.VolumeStore
discoveryWatcher discoveryReloader
root string
seccompEnabled bool
shutdown bool
uidMaps []idtools.IDMap
gidMaps []idtools.IDMap
layerStore layer.Store
imageStore image.Store
nameIndex *registrar.Registrar
linkIndex *linkIndex
containerd libcontainerd.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
}
*/
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")
//初始化http的路由，这个路由设计的非常易懂，所有的路由及处理函数的映射关系
//请见api/server/router/文件夹中的内容。有类似这样的内容：
//router.NewPostRoute("/containers/create", r.postContainersCreate),
//其中，对应的处理函数postContainersCreate在api/server/router/container/container_routes.go
//但是，实际上这个函数也不做具体的事情，他交给backend去做，就是daemon去做
/*
ccr, err := s.backend.ContainerCreate(types.ContainerCreateConfig{
Name: name,
Config: config,
HostConfig: hostConfig,
NetworkingConfig: networkingConfig,
AdjustCPUShares: adjustCPUShares,
})
*/
//其中的ContainerCreate在
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
//设置一个传输apiServer状态的通道
serveAPIWait := make(chan error)
//重新开启一个goroutine作为httpServer。
//具体的请查看api/server/server.go中的方法func (s *Server) serveAPI() 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
//<-表示接受通道值，只有当通道中有值的时候，才会返回。
//也就是说主线程一直在等待api.wait的goroutine启动apiServer之后的返回才会进行。
errAPI := <-serveAPIWait
//当接收到返回（返回就是错误了），开始清理进程。
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
}
// 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(daemonFlags, commonFlags.FlagSet)
}
daemonFlags.ParseFlags(args, true)
commonFlags.PostParse()
if commonFlags.TrustKey == "" {
commonFlags.TrustKey = filepath.Join(getDaemonConfDir(), defaultTrustKeyFile)
}
if utils.ExperimentalBuild() {
logrus.Warn("Running experimental build")
}
logrus.SetFormatter(&logrus.TextFormatter{TimestampFormat: jsonlog.RFC3339NanoFixed})
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{
AuthZPluginNames: cli.Config.AuthZPlugins,
Logging: true,
Version: dockerversion.Version,
}
serverConfig = setPlatformServerConfig(serverConfig, cli.Config)
defaultHost := opts.DefaultHost
if commonFlags.TLSOptions != nil {
if !commonFlags.TLSOptions.InsecureSkipVerify {
// server requires and verifies client's certificate
commonFlags.TLSOptions.ClientAuth = tls.RequireAndVerifyClientCert
}
tlsConfig, err := tlsconfig.Server(*commonFlags.TLSOptions)
if err != nil {
logrus.Fatal(err)
}
serverConfig.TLSConfig = tlsConfig
defaultHost = opts.DefaultTLSHost
}
if len(commonFlags.Hosts) == 0 {
commonFlags.Hosts = make([]string, 1)
}
for i := 0; i < len(commonFlags.Hosts); i++ {
var err error
if commonFlags.Hosts[i], err = opts.ParseHost(defaultHost, commonFlags.Hosts[i]); err != nil {
logrus.Fatalf("error parsing -H %s : %v", commonFlags.Hosts[i], err)
}
}
for _, protoAddr := range commonFlags.Hosts {
protoAddrParts := strings.SplitN(protoAddr, "://", 2)
if len(protoAddrParts) != 2 {
logrus.Fatalf("bad format %s, expected PROTO://ADDR", protoAddr)
}
serverConfig.Addrs = append(serverConfig.Addrs, apiserver.Addr{Proto: protoAddrParts[0], Addr: protoAddrParts[1]})
}
api, err := apiserver.New(serverConfig)
if err != nil {
logrus.Fatal(err)
}
if err := migrateKey(); err != nil {
logrus.Fatal(err)
}
cli.TrustKeyPath = commonFlags.TrustKey
registryService := registry.NewService(cli.registryOptions)
d, err := daemon.NewDaemon(cli.Config, registryService)
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,
"execdriver": d.ExecutionDriver().Name(),
"graphdriver": d.GraphDriverName(),
}).Info("Docker daemon")
api.InitRouters(d)
// 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 func() {
if err := api.ServeAPI(); err != nil {
logrus.Errorf("ServeAPI error: %v", err)
serveAPIWait <- err
return
}
serveAPIWait <- nil
}()
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)
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
}
// CmdDaemon is the daemon command, called the raw arguments after `docker daemon`.
func (cli *DaemonCli) CmdDaemon(args ...string) error {
if *flDaemon {
// allow legacy forms `docker -D -d` and `docker -d -D`
logrus.Warn("please use 'docker daemon' instead.")
} else 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(daemonFlags, commonFlags.FlagSet)
}
daemonFlags.ParseFlags(args, true)
commonFlags.PostParse()
if len(commonFlags.Hosts) == 0 {
commonFlags.Hosts = []string{opts.DefaultHost}
}
if commonFlags.TrustKey == "" {
commonFlags.TrustKey = filepath.Join(getDaemonConfDir(), defaultTrustKeyFile)
}
if utils.ExperimentalBuild() {
logrus.Warn("Running experimental build")
}
logrus.SetFormatter(&logrus.TextFormatter{TimestampFormat: timeutils.RFC3339NanoFixed})
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)
}
}()
}
if cli.LogConfig.Config == nil {
cli.LogConfig.Config = make(map[string]string)
}
serverConfig := &apiserver.ServerConfig{
Logging: true,
EnableCors: cli.EnableCors,
CorsHeaders: cli.CorsHeaders,
Version: dockerversion.VERSION,
}
serverConfig = setPlatformServerConfig(serverConfig, cli.Config)
if commonFlags.TLSOptions != nil {
if !commonFlags.TLSOptions.InsecureSkipVerify {
// server requires and verifies client's certificate
commonFlags.TLSOptions.ClientAuth = tls.RequireAndVerifyClientCert
}
tlsConfig, err := tlsconfig.Server(*commonFlags.TLSOptions)
if err != nil {
logrus.Fatalf("foobar: %v", err)
}
serverConfig.TLSConfig = tlsConfig
}
api := apiserver.New(serverConfig)
// 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 func() {
if err := api.ServeApi(commonFlags.Hosts); err != nil {
logrus.Errorf("ServeAPI error: %v", err)
serveAPIWait <- err
return
}
serveAPIWait <- nil
}()
if err := migrateKey(); err != nil {
logrus.Fatal(err)
}
cli.TrustKeyPath = commonFlags.TrustKey
registryService := registry.NewService(cli.registryOptions)
d, err := daemon.NewDaemon(cli.Config, registryService)
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,
"execdriver": d.ExecutionDriver().Name(),
"graphdriver": d.GraphDriver().String(),
}).Info("Docker daemon")
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 tell the api to start
// accepting connections with specified daemon
api.AcceptConnections(d)
// Daemon is fully initialized and handling API traffic
// Wait for serve API to complete
errAPI := <-serveAPIWait
shutdownDaemon(d, 15)
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
}
func mainDaemon() {
if flag.NArg() != 0 {
flag.Usage()
return
}
eng := engine.New()
signal.Trap(eng.Shutdown)
if err := migrateKey(); err != nil {
logrus.Fatal(err)
}
daemonCfg.TrustKeyPath = *flTrustKey
// Load builtins
if err := builtins.Register(eng); err != nil {
logrus.Fatal(err)
}
// load registry service
if err := registry.NewService(registryCfg).Install(eng); err != nil {
logrus.Fatal(err)
}
// load the daemon in the background so we can immediately start
// the http api so that connections don't fail while the daemon
// is booting
daemonInitWait := make(chan error)
go func() {
d, err := daemon.NewDaemon(daemonCfg, eng)
if err != nil {
daemonInitWait <- err
return
}
logrus.Infof("docker daemon: %s %s; execdriver: %s; graphdriver: %s",
dockerversion.VERSION,
dockerversion.GITCOMMIT,
d.ExecutionDriver().Name(),
d.GraphDriver().String(),
)
if err := d.Install(eng); err != nil {
daemonInitWait <- err
return
}
b := &builder.BuilderJob{eng, d}
b.Install()
// after the daemon is done setting up we can tell the api to start
// accepting connections
if err := eng.Job("acceptconnections").Run(); err != nil {
daemonInitWait <- err
return
}
daemonInitWait <- nil
}()
// Serve api
job := eng.Job("serveapi", flHosts...)
job.SetenvBool("Logging", true)
job.SetenvBool("EnableCors", daemonCfg.EnableCors)
job.Setenv("CorsHeaders", daemonCfg.CorsHeaders)
job.Setenv("Version", dockerversion.VERSION)
job.Setenv("SocketGroup", daemonCfg.SocketGroup)
job.SetenvBool("Tls", *flTls)
job.SetenvBool("TlsVerify", *flTlsVerify)
job.Setenv("TlsCa", *flCa)
job.Setenv("TlsCert", *flCert)
job.Setenv("TlsKey", *flKey)
job.SetenvBool("BufferRequests", true)
// The serve API job 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 func() {
if err := job.Run(); err != nil {
logrus.Errorf("ServeAPI error: %v", err)
serveAPIWait <- err
return
}
serveAPIWait <- nil
}()
// Wait for the daemon startup goroutine to finish
// This makes sure we can actually cleanly shutdown the daemon
logrus.Debug("waiting for daemon to initialize")
errDaemon := <-daemonInitWait
if errDaemon != nil {
eng.Shutdown()
outStr := fmt.Sprintf("Shutting down daemon due to errors: %v", errDaemon)
if strings.Contains(errDaemon.Error(), "engine is shutdown") {
// if the error is "engine is shutdown", we've already reported (or
// will report below in API server errors) the error
outStr = "Shutting down daemon due to reported errors"
}
// we must "fatal" exit here as the API server may be happy to
// continue listening forever if the error had no impact to API
logrus.Fatal(outStr)
} else {
logrus.Info("Daemon has completed initialization")
}
// Daemon is fully initialized and handling API traffic
// Wait for serve API job to complete
errAPI := <-serveAPIWait
// If we have an error here it is unique to API (as daemonErr would have
// exited the daemon process above)
eng.Shutdown()
if errAPI != nil {
logrus.Fatalf("Shutting down due to ServeAPI error: %v", errAPI)
}
}
func execMonitor() {
log.Debugf("Starting docker monitor %v", os.Args)
var (
root string
socketGroup string
ID string
err error
)
flag.StringVar(&root, "root", "/var/lib/docker", "docker root directory")
flag.StringVar(&socketGroup, "group", "docker", "socket user group")
flag.StringVar(&ID, "id", "", "container id")
flag.Parse()
initLogging(true)
if ID == "" || root == "" {
log.Errorf("%s: container id can't be null", dockerMonitor)
flag.Usage()
os.Exit(1)
}
monitorCfg.ID = ID
monitorCfg.Root = root
monitorCfg.SocketGroup = socketGroup
syncPipe, err := syncpipe.NewSyncPipeFromFd(0, 3)
if err != nil {
log.Errorf("%s: open sync pipe failed: %v", dockerMonitor, err)
os.Exit(1)
}
watching := daemon.NewStateWatcher()
log.Debugf("MonitorConfig: %v", *monitorCfg)
monitor := daemon.InitDockerMonitor(monitorCfg, watching)
if monitor == nil {
log.Errorf("Initial docker monitor return nil")
os.Exit(1)
}
srv := apiserver.NewMonitorServer(&apiserver.ServerConfig{
Logging: true,
EnableCors: true,
Version: dockerversion.VERSION,
SocketGroup: monitorCfg.SocketGroup,
}, monitor, watching)
signal.Trap(srv.Shutdown)
// notify monitor proxy when server is setup
go func() {
select {
case <-srv.Start():
log.Debugf("Monitor server is up, notify monitor proxy")
syncPipe.CloseChild()
}
}()
//srvAPIWait := make(chan error)
// setup Monitor server
protoAddrs := []string{fmt.Sprintf("unix://%s/%s.sock", daemon.MonitorSockDir, ID)}
go func() {
if err := srv.ServeApi(protoAddrs); err != nil {
log.Errorf("ServeAPI error: %v", err)
//srvAPIWait <- err
srv.Notify(err)
}
}()
srv.AcceptConnections()
err = srv.Wait()
log.Infof("docker monitor exit, with error: %v", err)
}
func mainDaemon() {
if flag.NArg() != 0 {
flag.Usage()
return
}
if *bridgeName != "" && *bridgeIp != "" {
log.Fatal("You specified -b & --bip, mutually exclusive options. Please specify only one.")
}
if !*flEnableIptables && !*flInterContainerComm {
log.Fatal("You specified --iptables=false with --icc=false. ICC uses iptables to function. Please set --icc or --iptables to true.")
}
if net.ParseIP(*flDefaultIp) == nil {
log.Fatalf("Specified --ip=%s is not in correct format \"0.0.0.0\".", *flDefaultIp)
}
eng := engine.New()
signal.Trap(eng.Shutdown)
// Load builtins
if err := builtins.Register(eng); err != nil {
log.Fatal(err)
}
// load the daemon in the background so we can immediately start
// the http api so that connections don't fail while the daemon
// is booting
go func() {
// Load plugin: httpapi
job := eng.Job("initserver")
// include the variable here too, for the server config
job.Setenv("Pidfile", *pidfile)
job.Setenv("Root", *flRoot)
job.SetenvBool("AutoRestart", *flAutoRestart)
job.SetenvList("Dns", flDns.GetAll())
job.SetenvList("DnsSearch", flDnsSearch.GetAll())
job.SetenvBool("EnableIptables", *flEnableIptables)
job.SetenvBool("EnableIpForward", *flEnableIpForward)
job.Setenv("BridgeIface", *bridgeName)
job.Setenv("BridgeIP", *bridgeIp)
job.Setenv("DefaultIp", *flDefaultIp)
job.SetenvBool("InterContainerCommunication", *flInterContainerComm)
job.Setenv("GraphDriver", *flGraphDriver)
job.SetenvList("GraphOptions", flGraphOpts.GetAll())
job.Setenv("ExecDriver", *flExecDriver)
job.SetenvInt("Mtu", *flMtu)
job.SetenvBool("EnableSelinuxSupport", *flSelinuxEnabled)
job.SetenvList("Sockets", flHosts.GetAll())
if err := job.Run(); err != nil {
log.Fatal(err)
}
// after the daemon is done setting up we can tell the api to start
// accepting connections
if err := eng.Job("acceptconnections").Run(); err != nil {
log.Fatal(err)
}
}()
// TODO actually have a resolved graphdriver to show?
log.Printf("docker daemon: %s %s; execdriver: %s; graphdriver: %s",
dockerversion.VERSION,
dockerversion.GITCOMMIT,
*flExecDriver,
*flGraphDriver)
// Serve api
job := eng.Job("serveapi", flHosts.GetAll()...)
job.SetenvBool("Logging", true)
job.SetenvBool("EnableCors", *flEnableCors)
job.Setenv("Version", dockerversion.VERSION)
job.Setenv("SocketGroup", *flSocketGroup)
job.SetenvBool("Tls", *flTls)
job.SetenvBool("TlsVerify", *flTlsVerify)
job.Setenv("TlsCa", *flCa)
job.Setenv("TlsCert", *flCert)
job.Setenv("TlsKey", *flKey)
job.SetenvBool("BufferRequests", true)
if err := job.Run(); err != nil {
log.Fatal(err)
}
}