Ejemplo n.º 1
0
func (e *Etcd) runServer() {
	var removeNotify <-chan bool
	for {
		if e.mode == PeerMode {
			log.Infof("%v starting in peer mode", e.Config.Name)
			// Starting peer server should be followed close by listening on its port
			// If not, it may leave many requests unaccepted, or cannot receive heartbeat from the cluster.
			// One severe problem caused if failing receiving heartbeats is when the second node joins one-node cluster,
			// the cluster could be out of work as long as the two nodes cannot transfer messages.
			e.PeerServer.Start(e.Config.Snapshot, e.Config.ClusterConfig())
			removeNotify = e.PeerServer.RemoveNotify()
		} else {
			log.Infof("%v starting in standby mode", e.Config.Name)
			e.StandbyServer.Start()
			removeNotify = e.StandbyServer.RemoveNotify()
		}

		// etcd server is ready to accept connections, notify waiters.
		e.onceReady.Do(func() { close(e.readyNotify) })

		select {
		case <-e.closeChan:
			e.PeerServer.Stop()
			e.StandbyServer.Stop()
			return
		case <-removeNotify:
		}

		if e.mode == PeerMode {
			peerURLs := e.Registry.PeerURLs(e.PeerServer.RaftServer().Leader(), e.Config.Name)
			e.StandbyServer.SyncCluster(peerURLs)
			e.setMode(StandbyMode)
		} else {
			// Create etcd key-value store and registry.
			e.Store = store.New()
			e.Registry = server.NewRegistry(e.Store)
			e.PeerServer.SetStore(e.Store)
			e.PeerServer.SetRegistry(e.Registry)
			e.Server.SetStore(e.Store)
			e.Server.SetRegistry(e.Registry)

			// Generate new peer server here.
			// TODO(yichengq): raft server cannot be started after stopped.
			// It should be removed when raft restart is implemented.
			heartbeatInterval := time.Duration(e.Config.Peer.HeartbeatInterval) * time.Millisecond
			electionTimeout := time.Duration(e.Config.Peer.ElectionTimeout) * time.Millisecond
			raftServer, err := raft.NewServer(e.Config.Name, e.Config.DataDir, e.PeerServer.RaftServer().Transporter(), e.Store, e.PeerServer, "")
			if err != nil {
				log.Fatal(err)
			}
			raftServer.SetElectionTimeout(electionTimeout)
			raftServer.SetHeartbeatInterval(heartbeatInterval)
			e.PeerServer.SetRaftServer(raftServer, e.Config.Snapshot)
			e.StandbyServer.SetRaftServer(raftServer)

			e.PeerServer.SetJoinIndex(e.StandbyServer.JoinIndex())
			e.setMode(PeerMode)
		}
	}
}
Ejemplo n.º 2
0
// Starts a server in a temporary directory.
func RunServer(f func(*server.Server)) {
	path, _ := ioutil.TempDir("", "etcd-")
	defer os.RemoveAll(path)

	store := store.New()
	registry := server.NewRegistry(store)
	ps := server.NewPeerServer(testName, path, testRaftURL, testRaftURL, &server.TLSConfig{Scheme: "http"}, &server.TLSInfo{}, registry, store, testSnapCount)
	s := server.New(testName, testClientURL, testClientURL, &server.TLSConfig{Scheme: "http"}, &server.TLSInfo{}, ps, registry, store)
	ps.SetServer(s)

	// Start up peer server.
	c := make(chan bool)
	go func() {
		c <- true
		ps.ListenAndServe(false, []string{})
	}()
	<-c

	// Start up etcd server.
	go func() {
		c <- true
		s.ListenAndServe()
	}()
	<-c

	// Wait to make sure servers have started.
	time.Sleep(50 * time.Millisecond)

	// Execute the function passed in.
	f(s)

	// Clean up servers.
	ps.Close()
	s.Close()
}
Ejemplo n.º 3
0
Archivo: etcd.go Proyecto: heroku/etcd
func main() {
	// Load configuration.
	var config = config.New()
	if err := config.Load(os.Args[1:]); err != nil {
		fmt.Println(server.Usage() + "\n")
		fmt.Println(err.Error() + "\n")
		os.Exit(1)
	} else if config.ShowVersion {
		fmt.Println("etcd version", server.ReleaseVersion)
		os.Exit(0)
	} else if config.ShowHelp {
		fmt.Println(server.Usage() + "\n")
		os.Exit(0)
	}

	// Enable options.
	if config.VeryVeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Trace)
	} else if config.VeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Debug)
	} else if config.Verbose {
		log.Verbose = true
	}
	if config.CPUProfileFile != "" {
		profile(config.CPUProfileFile)
	}

	if config.DataDir == "" {
		log.Fatal("The data dir was not set and could not be guessed from machine name")
	}

	// Create data directory if it doesn't already exist.
	if err := os.MkdirAll(config.DataDir, 0744); err != nil {
		log.Fatalf("Unable to create path: %s", err)
	}

	// Warn people if they have an info file
	info := filepath.Join(config.DataDir, "info")
	if _, err := os.Stat(info); err == nil {
		log.Warnf("All cached configuration is now ignored. The file %s can be removed.", info)
	}

	var mbName string
	if config.Trace() {
		mbName = config.MetricsBucketName()
		runtime.SetBlockProfileRate(1)
	}

	mb := metrics.NewBucket(mbName)

	if config.GraphiteHost != "" {
		err := mb.Publish(config.GraphiteHost)
		if err != nil {
			panic(err)
		}
	}

	// Retrieve CORS configuration
	corsInfo, err := ehttp.NewCORSInfo(config.CorsOrigins)
	if err != nil {
		log.Fatal("CORS:", err)
	}

	// Create etcd key-value store and registry.
	store := store.New()
	registry := server.NewRegistry(store)

	// Create stats objects
	followersStats := server.NewRaftFollowersStats(config.Name)
	serverStats := server.NewRaftServerStats(config.Name)

	// Calculate all of our timeouts
	heartbeatInterval := time.Duration(config.Peer.HeartbeatInterval) * time.Millisecond
	electionTimeout := time.Duration(config.Peer.ElectionTimeout) * time.Millisecond
	dialTimeout := (3 * heartbeatInterval) + electionTimeout
	responseHeaderTimeout := (3 * heartbeatInterval) + electionTimeout

	// Create peer server
	psConfig := server.PeerServerConfig{
		Name:           config.Name,
		Scheme:         config.PeerTLSInfo().Scheme(),
		URL:            config.Peer.Addr,
		SnapshotCount:  config.SnapshotCount,
		MaxClusterSize: config.MaxClusterSize,
		RetryTimes:     config.MaxRetryAttempts,
		RetryInterval:  config.RetryInterval,
	}
	ps := server.NewPeerServer(psConfig, registry, store, &mb, followersStats, serverStats)

	var psListener net.Listener
	if psConfig.Scheme == "https" {
		peerServerTLSConfig, err := config.PeerTLSInfo().ServerConfig()
		if err != nil {
			log.Fatal("peer server TLS error: ", err)
		}

		psListener, err = server.NewTLSListener(config.Peer.BindAddr, peerServerTLSConfig)
		if err != nil {
			log.Fatal("Failed to create peer listener: ", err)
		}
	} else {
		psListener, err = server.NewListener(config.Peer.BindAddr)
		if err != nil {
			log.Fatal("Failed to create peer listener: ", err)
		}
	}

	// Create raft transporter and server
	raftTransporter := server.NewTransporter(followersStats, serverStats, registry, heartbeatInterval, dialTimeout, responseHeaderTimeout)
	if psConfig.Scheme == "https" {
		raftClientTLSConfig, err := config.PeerTLSInfo().ClientConfig()
		if err != nil {
			log.Fatal("raft client TLS error: ", err)
		}
		raftTransporter.SetTLSConfig(*raftClientTLSConfig)
	}
	raftServer, err := raft.NewServer(config.Name, config.DataDir, raftTransporter, store, ps, "")
	if err != nil {
		log.Fatal(err)
	}
	raftServer.SetElectionTimeout(electionTimeout)
	raftServer.SetHeartbeatInterval(heartbeatInterval)
	ps.SetRaftServer(raftServer)

	// Create etcd server
	s := server.New(config.Name, config.Addr, ps, registry, store, &mb)

	if config.Trace() {
		s.EnableTracing()
	}

	var sListener net.Listener
	if config.EtcdTLSInfo().Scheme() == "https" {
		etcdServerTLSConfig, err := config.EtcdTLSInfo().ServerConfig()
		if err != nil {
			log.Fatal("etcd TLS error: ", err)
		}

		sListener, err = server.NewTLSListener(config.BindAddr, etcdServerTLSConfig)
		if err != nil {
			log.Fatal("Failed to create TLS etcd listener: ", err)
		}
	} else {
		sListener, err = server.NewListener(config.BindAddr)
		if err != nil {
			log.Fatal("Failed to create etcd listener: ", err)
		}
	}

	ps.SetServer(s)
	ps.Start(config.Snapshot, config.Discovery, config.Peers)

	go func() {
		log.Infof("peer server [name %s, listen on %s, advertised url %s]", ps.Config.Name, psListener.Addr(), ps.Config.URL)
		sHTTP := &ehttp.CORSHandler{ps.HTTPHandler(), corsInfo}
		log.Fatal(http.Serve(psListener, sHTTP))
	}()

	log.Infof("etcd server [name %s, listen on %s, advertised url %s]", s.Name, sListener.Addr(), s.URL())
	sHTTP := &ehttp.CORSHandler{s.HTTPHandler(), corsInfo}
	log.Fatal(http.Serve(sListener, sHTTP))
}
Ejemplo n.º 4
0
func main() {
	// Load configuration.
	var config = server.NewConfig()
	if err := config.Load(os.Args[1:]); err != nil {
		fmt.Println(server.Usage() + "\n")
		fmt.Println(err.Error() + "\n")
		os.Exit(1)
	} else if config.ShowVersion {
		fmt.Println(server.ReleaseVersion)
		os.Exit(0)
	} else if config.ShowHelp {
		fmt.Println(server.Usage() + "\n")
		os.Exit(0)
	}

	// Enable options.
	if config.VeryVeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Trace)
	} else if config.VeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Debug)
	} else if config.Verbose {
		log.Verbose = true
	}
	if config.CPUProfileFile != "" {
		profile(config.CPUProfileFile)
	}

	if config.DataDir == "" {
		log.Fatal("The data dir was not set and could not be guessed from machine name")
	}

	// Create data directory if it doesn't already exist.
	if err := os.MkdirAll(config.DataDir, 0744); err != nil {
		log.Fatalf("Unable to create path: %s", err)
	}

	// Load info object.
	info, err := config.Info()
	if err != nil {
		log.Fatal("info:", err)
	}

	// Retrieve TLS configuration.
	tlsConfig, err := info.EtcdTLS.Config()
	if err != nil {
		log.Fatal("Client TLS:", err)
	}
	peerTLSConfig, err := info.RaftTLS.Config()
	if err != nil {
		log.Fatal("Peer TLS:", err)
	}

	var mbName string
	if config.Trace() {
		mbName = config.MetricsBucketName()
		runtime.SetBlockProfileRate(1)
	}

	mb := metrics.NewBucket(mbName)

	if config.GraphiteHost != "" {
		err := mb.Publish(config.GraphiteHost)
		if err != nil {
			panic(err)
		}
	}

	// Create etcd key-value store and registry.
	store := store.New()
	registry := server.NewRegistry(store)

	// Create peer server.
	heartbeatTimeout := time.Duration(config.Peer.HeartbeatTimeout) * time.Millisecond
	electionTimeout := time.Duration(config.Peer.ElectionTimeout) * time.Millisecond
	ps := server.NewPeerServer(info.Name, config.DataDir, info.RaftURL, info.RaftListenHost, &peerTLSConfig, &info.RaftTLS, registry, store, config.SnapshotCount, heartbeatTimeout, electionTimeout, &mb)
	ps.MaxClusterSize = config.MaxClusterSize
	ps.RetryTimes = config.MaxRetryAttempts

	// Create client server.
	s := server.New(info.Name, info.EtcdURL, info.EtcdListenHost, &tlsConfig, &info.EtcdTLS, ps, registry, store, &mb)
	if err := s.AllowOrigins(config.CorsOrigins); err != nil {
		panic(err)
	}

	if config.Trace() {
		s.EnableTracing()
	}

	ps.SetServer(s)

	// Run peer server in separate thread while the client server blocks.
	go func() {
		log.Fatal(ps.ListenAndServe(config.Snapshot, config.Peers))
	}()
	log.Fatal(s.ListenAndServe())
}
Ejemplo n.º 5
0
func main() {
	// Load configuration.
	var config = server.NewConfig()
	if err := config.Load(os.Args[1:]); err != nil {
		fmt.Println(server.Usage() + "\n")
		fmt.Println(err.Error() + "\n")
		os.Exit(1)
	} else if config.ShowVersion {
		fmt.Println(server.ReleaseVersion)
		os.Exit(0)
	} else if config.ShowHelp {
		fmt.Println(server.Usage() + "\n")
		os.Exit(0)
	}

	// Enable options.
	if config.VeryVeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Trace)
	} else if config.VeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Debug)
	} else if config.Verbose {
		log.Verbose = true
	}
	if config.CPUProfileFile != "" {
		profile(config.CPUProfileFile)
	}

	if config.DataDir == "" {
		log.Fatal("The data dir was not set and could not be guessed from machine name")
	}

	// Create data directory if it doesn't already exist.
	if err := os.MkdirAll(config.DataDir, 0744); err != nil {
		log.Fatalf("Unable to create path: %s", err)
	}

	// Load info object.
	info, err := config.Info()
	if err != nil {
		log.Fatal("info:", err)
	}

	// Retrieve TLS configuration.
	tlsConfig, err := info.EtcdTLS.Config()
	if err != nil {
		log.Fatal("Client TLS:", err)
	}
	peerTLSConfig, err := info.RaftTLS.Config()
	if err != nil {
		log.Fatal("Peer TLS:", err)
	}

	var mbName string
	if config.Trace() {
		mbName = config.MetricsBucketName()
		runtime.SetBlockProfileRate(1)
	}

	mb := metrics.NewBucket(mbName)

	if config.GraphiteHost != "" {
		err := mb.Publish(config.GraphiteHost)
		if err != nil {
			panic(err)
		}
	}

	// Retrieve CORS configuration
	corsInfo, err := ehttp.NewCORSInfo(config.CorsOrigins)
	if err != nil {
		log.Fatal("CORS:", err)
	}

	// Create etcd key-value store and registry.
	store := store.New()
	registry := server.NewRegistry(store)

	// Create stats objects
	followersStats := server.NewRaftFollowersStats(info.Name)
	serverStats := server.NewRaftServerStats(info.Name)

	// Calculate all of our timeouts
	heartbeatTimeout := time.Duration(config.Peer.HeartbeatTimeout) * time.Millisecond
	electionTimeout := time.Duration(config.Peer.ElectionTimeout) * time.Millisecond
	dialTimeout := (3 * heartbeatTimeout) + electionTimeout
	responseHeaderTimeout := (3 * heartbeatTimeout) + electionTimeout

	// Create peer server.
	psConfig := server.PeerServerConfig{
		Name:           info.Name,
		Scheme:         peerTLSConfig.Scheme,
		URL:            info.RaftURL,
		SnapshotCount:  config.SnapshotCount,
		MaxClusterSize: config.MaxClusterSize,
		RetryTimes:     config.MaxRetryAttempts,
	}
	ps := server.NewPeerServer(psConfig, registry, store, &mb, followersStats, serverStats)

	var psListener net.Listener
	if psConfig.Scheme == "https" {
		psListener, err = server.NewTLSListener(info.RaftListenHost, info.RaftTLS.CertFile, info.RaftTLS.KeyFile)
	} else {
		psListener, err = server.NewListener(info.RaftListenHost)
	}
	if err != nil {
		panic(err)
	}

	// Create Raft transporter and server
	raftTransporter := server.NewTransporter(followersStats, serverStats, registry, heartbeatTimeout, dialTimeout, responseHeaderTimeout)
	if psConfig.Scheme == "https" {
		raftTransporter.SetTLSConfig(peerTLSConfig.Client)
	}
	raftServer, err := raft.NewServer(info.Name, config.DataDir, raftTransporter, store, ps, "")
	if err != nil {
		log.Fatal(err)
	}
	raftServer.SetElectionTimeout(electionTimeout)
	raftServer.SetHeartbeatTimeout(heartbeatTimeout)
	ps.SetRaftServer(raftServer)

	// Create client server.
	s := server.New(info.Name, info.EtcdURL, ps, registry, store, &mb)

	if config.Trace() {
		s.EnableTracing()
	}

	var sListener net.Listener
	if tlsConfig.Scheme == "https" {
		sListener, err = server.NewTLSListener(info.EtcdListenHost, info.EtcdTLS.CertFile, info.EtcdTLS.KeyFile)
	} else {
		sListener, err = server.NewListener(info.EtcdListenHost)
	}
	if err != nil {
		panic(err)
	}

	ps.SetServer(s)

	ps.Start(config.Snapshot, config.Peers)

	// Run peer server in separate thread while the client server blocks.
	go func() {
		log.Infof("raft server [name %s, listen on %s, advertised url %s]", ps.Config.Name, psListener.Addr(), ps.Config.URL)
		sHTTP := &ehttp.CORSHandler{ps.HTTPHandler(), corsInfo}
		log.Fatal(http.Serve(psListener, sHTTP))
	}()

	log.Infof("etcd server [name %s, listen on %s, advertised url %s]", s.Name, sListener.Addr(), s.URL())
	sHTTP := &ehttp.CORSHandler{s.HTTPHandler(), corsInfo}
	log.Fatal(http.Serve(sListener, sHTTP))
}
Ejemplo n.º 6
0
func main() {
	parseFlags()

	// Load configuration.
	var config = server.NewConfig()
	if err := config.Load(os.Args[1:]); err != nil {
		log.Fatal("Configuration error:", err)
	}

	// Turn on logging.
	if config.VeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Debug)
	} else if config.Verbose {
		log.Verbose = true
	}

	// Setup a default directory based on the machine name
	if config.DataDir == "" {
		config.DataDir = config.Name + ".etcd"
		log.Warnf("Using the directory %s as the etcd configuration directory because a directory was not specified. ", config.DataDir)
	}

	// Create data directory if it doesn't already exist.
	if err := os.MkdirAll(config.DataDir, 0744); err != nil {
		log.Fatalf("Unable to create path: %s", err)
	}

	// Load info object.
	info, err := config.Info()
	if err != nil {
		log.Fatal("info:", err)
	}
	if info.Name == "" {
		host, err := os.Hostname()
		if err != nil || host == "" {
			log.Fatal("Machine name required and hostname not set. e.g. '-n=machine_name'")
		}
		log.Warnf("Using hostname %s as the machine name. You must ensure this name is unique among etcd machines.", host)
		info.Name = host
	}

	// Retrieve TLS configuration.
	tlsConfig, err := info.EtcdTLS.Config()
	if err != nil {
		log.Fatal("Client TLS:", err)
	}
	peerTLSConfig, err := info.RaftTLS.Config()
	if err != nil {
		log.Fatal("Peer TLS:", err)
	}

	// Create etcd key-value store and registry.
	store := store.New()
	registry := server.NewRegistry(store)

	// Create peer server.
	ps := server.NewPeerServer(info.Name, config.DataDir, info.RaftURL, info.RaftListenHost, &peerTLSConfig, &info.RaftTLS, registry, store, config.SnapCount)
	ps.MaxClusterSize = config.MaxClusterSize
	ps.RetryTimes = config.MaxRetryAttempts

	// Create client server.
	s := server.New(info.Name, info.EtcdURL, info.EtcdListenHost, &tlsConfig, &info.EtcdTLS, ps, registry, store)
	if err := s.AllowOrigins(config.Cors); err != nil {
		panic(err)
	}

	ps.SetServer(s)

	// Run peer server in separate thread while the client server blocks.
	go func() {
		log.Fatal(ps.ListenAndServe(config.Snapshot, config.Machines))
	}()
	log.Fatal(s.ListenAndServe())
}
Ejemplo n.º 7
0
// Run the etcd instance.
func (e *Etcd) Run() {
	// Sanitize all the input fields.
	if err := e.Config.Sanitize(); err != nil {
		log.Fatalf("failed sanitizing configuration: %v", err)
	}

	// Force remove server configuration if specified.
	if e.Config.Force {
		e.Config.Reset()
	}

	// Enable options.
	if e.Config.VeryVeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Trace)
		goetcd.SetLogger(
			golog.New(
				"go-etcd",
				false,
				golog.CombinedSink(
					os.Stdout,
					"[%s] %s %-9s | %s\n",
					[]string{"prefix", "time", "priority", "message"},
				),
			),
		)
	} else if e.Config.VeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Debug)
	} else if e.Config.Verbose {
		log.Verbose = true
	}

	if e.Config.CPUProfileFile != "" {
		profile(e.Config.CPUProfileFile)
	}

	if e.Config.DataDir == "" {
		log.Fatal("The data dir was not set and could not be guessed from machine name")
	}

	// Create data directory if it doesn't already exist.
	if err := os.MkdirAll(e.Config.DataDir, 0744); err != nil {
		log.Fatalf("Unable to create path: %s", err)
	}

	// Warn people if they have an info file
	info := filepath.Join(e.Config.DataDir, "info")
	if _, err := os.Stat(info); err == nil {
		log.Warnf("All cached configuration is now ignored. The file %s can be removed.", info)
	}

	var mbName string
	if e.Config.Trace() {
		mbName = e.Config.MetricsBucketName()
		runtime.SetBlockProfileRate(1)
	}

	mb := metrics.NewBucket(mbName)

	if e.Config.GraphiteHost != "" {
		err := mb.Publish(e.Config.GraphiteHost)
		if err != nil {
			panic(err)
		}
	}

	// Retrieve CORS configuration
	corsInfo, err := ehttp.NewCORSInfo(e.Config.CorsOrigins)
	if err != nil {
		log.Fatal("CORS:", err)
	}

	// Create etcd key-value store and registry.
	e.Store = store.New()
	e.Registry = server.NewRegistry(e.Store)

	// Create stats objects
	followersStats := server.NewRaftFollowersStats(e.Config.Name)
	serverStats := server.NewRaftServerStats(e.Config.Name)

	// Calculate all of our timeouts
	heartbeatInterval := time.Duration(e.Config.Peer.HeartbeatInterval) * time.Millisecond
	electionTimeout := time.Duration(e.Config.Peer.ElectionTimeout) * time.Millisecond
	dialTimeout := (3 * heartbeatInterval) + electionTimeout
	responseHeaderTimeout := (3 * heartbeatInterval) + electionTimeout

	clientTransporter := &httpclient.Transport{
		ResponseHeaderTimeout: responseHeaderTimeout + extraTimeout,
		// This is a workaround for Transport.CancelRequest doesn't work on
		// HTTPS connections blocked. The patch for it is in progress,
		// and would be available in Go1.3
		// More: https://codereview.appspot.com/69280043/
		ConnectTimeout: dialTimeout + extraTimeout,
		RequestTimeout: responseHeaderTimeout + dialTimeout + 2*extraTimeout,
	}
	if e.Config.PeerTLSInfo().Scheme() == "https" {
		clientTLSConfig, err := e.Config.PeerTLSInfo().ClientConfig()
		if err != nil {
			log.Fatal("client TLS error: ", err)
		}
		clientTransporter.TLSClientConfig = clientTLSConfig
		clientTransporter.DisableCompression = true
	}
	client := server.NewClient(clientTransporter)

	// Create peer server
	psConfig := server.PeerServerConfig{
		Name:          e.Config.Name,
		Scheme:        e.Config.PeerTLSInfo().Scheme(),
		URL:           e.Config.Peer.Addr,
		SnapshotCount: e.Config.SnapshotCount,
		RetryTimes:    e.Config.MaxRetryAttempts,
		RetryInterval: e.Config.RetryInterval,
	}
	e.PeerServer = server.NewPeerServer(psConfig, client, e.Registry, e.Store, &mb, followersStats, serverStats)

	// Create raft transporter and server
	raftTransporter := server.NewTransporter(followersStats, serverStats, e.Registry, heartbeatInterval, dialTimeout, responseHeaderTimeout)
	if e.Config.PeerTLSInfo().Scheme() == "https" {
		raftClientTLSConfig, err := e.Config.PeerTLSInfo().ClientConfig()
		if err != nil {
			log.Fatal("raft client TLS error: ", err)
		}
		raftTransporter.SetTLSConfig(*raftClientTLSConfig)
	}
	raftServer, err := raft.NewServer(e.Config.Name, e.Config.DataDir, raftTransporter, e.Store, e.PeerServer, "")
	if err != nil {
		log.Fatal(err)
	}
	raftServer.SetElectionTimeout(electionTimeout)
	raftServer.SetHeartbeatInterval(heartbeatInterval)
	e.PeerServer.SetRaftServer(raftServer, e.Config.Snapshot)

	// Create etcd server
	e.Server = server.New(e.Config.Name, e.Config.Addr, e.PeerServer, e.Registry, e.Store, &mb)

	if e.Config.Trace() {
		e.Server.EnableTracing()
	}

	e.PeerServer.SetServer(e.Server)

	// Create standby server
	ssConfig := server.StandbyServerConfig{
		Name:       e.Config.Name,
		PeerScheme: e.Config.PeerTLSInfo().Scheme(),
		PeerURL:    e.Config.Peer.Addr,
		ClientURL:  e.Config.Addr,
		DataDir:    e.Config.DataDir,
	}
	e.StandbyServer = server.NewStandbyServer(ssConfig, client)
	e.StandbyServer.SetRaftServer(raftServer)

	// Generating config could be slow.
	// Put it here to make listen happen immediately after peer-server starting.
	peerTLSConfig := server.TLSServerConfig(e.Config.PeerTLSInfo())
	etcdTLSConfig := server.TLSServerConfig(e.Config.EtcdTLSInfo())

	if !e.StandbyServer.IsRunning() {
		startPeerServer, possiblePeers, err := e.PeerServer.FindCluster(e.Config.Discovery, e.Config.Peers)
		if err != nil {
			log.Fatal(err)
		}
		if startPeerServer {
			e.setMode(PeerMode)
		} else {
			e.StandbyServer.SyncCluster(possiblePeers)
			e.setMode(StandbyMode)
		}
	} else {
		e.setMode(StandbyMode)
	}

	serverHTTPHandler := &ehttp.CORSHandler{e.Server.HTTPHandler(), corsInfo}
	peerServerHTTPHandler := &ehttp.CORSHandler{e.PeerServer.HTTPHandler(), corsInfo}
	standbyServerHTTPHandler := &ehttp.CORSHandler{e.StandbyServer.ClientHTTPHandler(), corsInfo}

	log.Infof("etcd server [name %s, listen on %s, advertised url %s]", e.Server.Name, e.Config.BindAddr, e.Server.URL())
	listener := server.NewListener(e.Config.EtcdTLSInfo().Scheme(), e.Config.BindAddr, etcdTLSConfig)

	e.server = &http.Server{Handler: &ModeHandler{e, serverHTTPHandler, standbyServerHTTPHandler},
		ReadTimeout:  time.Duration(e.Config.HTTPReadTimeout) * time.Second,
		WriteTimeout: time.Duration(e.Config.HTTPWriteTimeout) * time.Second,
	}

	log.Infof("peer server [name %s, listen on %s, advertised url %s]", e.PeerServer.Config.Name, e.Config.Peer.BindAddr, e.PeerServer.Config.URL)
	peerListener := server.NewListener(e.Config.PeerTLSInfo().Scheme(), e.Config.Peer.BindAddr, peerTLSConfig)

	e.peerServer = &http.Server{Handler: &ModeHandler{e, peerServerHTTPHandler, http.NotFoundHandler()},
		ReadTimeout:  time.Duration(server.DefaultReadTimeout) * time.Second,
		WriteTimeout: time.Duration(server.DefaultWriteTimeout) * time.Second,
	}

	wg := sync.WaitGroup{}
	wg.Add(2)
	go func() {
		<-e.readyNotify
		defer wg.Done()
		if err := e.server.Serve(listener); err != nil {
			if !isListenerClosing(err) {
				log.Fatal(err)
			}
		}
	}()
	go func() {
		<-e.readyNotify
		defer wg.Done()
		if err := e.peerServer.Serve(peerListener); err != nil {
			if !isListenerClosing(err) {
				log.Fatal(err)
			}
		}
	}()

	e.runServer()

	listener.Close()
	peerListener.Close()
	wg.Wait()
	log.Infof("etcd instance is stopped [name %s]", e.Config.Name)
	close(e.stopNotify)
}
Ejemplo n.º 8
0
// Run the etcd instance.
func (e *Etcd) Run() {
	// Enable options.
	if e.Config.VeryVeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Trace)
		goetcd.SetLogger(
			golog.New(
				"go-etcd",
				false,
				golog.CombinedSink(
					os.Stdout,
					"[%s] %s %-9s | %s\n",
					[]string{"prefix", "time", "priority", "message"},
				),
			),
		)
	} else if e.Config.VeryVerbose {
		log.Verbose = true
		raft.SetLogLevel(raft.Debug)
	} else if e.Config.Verbose {
		log.Verbose = true
	}

	if e.Config.CPUProfileFile != "" {
		profile(e.Config.CPUProfileFile)
	}

	if e.Config.DataDir == "" {
		log.Fatal("The data dir was not set and could not be guessed from machine name")
	}

	// Create data directory if it doesn't already exist.
	if err := os.MkdirAll(e.Config.DataDir, 0744); err != nil {
		log.Fatalf("Unable to create path: %s", err)
	}

	// Warn people if they have an info file
	info := filepath.Join(e.Config.DataDir, "info")
	if _, err := os.Stat(info); err == nil {
		log.Warnf("All cached configuration is now ignored. The file %s can be removed.", info)
	}

	var mbName string
	if e.Config.Trace() {
		mbName = e.Config.MetricsBucketName()
		runtime.SetBlockProfileRate(1)
	}

	mb := metrics.NewBucket(mbName)

	if e.Config.GraphiteHost != "" {
		err := mb.Publish(e.Config.GraphiteHost)
		if err != nil {
			panic(err)
		}
	}

	// Retrieve CORS configuration
	corsInfo, err := ehttp.NewCORSInfo(e.Config.CorsOrigins)
	if err != nil {
		log.Fatal("CORS:", err)
	}

	// Create etcd key-value store and registry.
	e.Store = store.New()
	e.Registry = server.NewRegistry(e.Store)

	// Create stats objects
	followersStats := server.NewRaftFollowersStats(e.Config.Name)
	serverStats := server.NewRaftServerStats(e.Config.Name)

	// Calculate all of our timeouts
	heartbeatInterval := time.Duration(e.Config.Peer.HeartbeatInterval) * time.Millisecond
	electionTimeout := time.Duration(e.Config.Peer.ElectionTimeout) * time.Millisecond
	dialTimeout := (3 * heartbeatInterval) + electionTimeout
	responseHeaderTimeout := (3 * heartbeatInterval) + electionTimeout

	// Create peer server
	psConfig := server.PeerServerConfig{
		Name:          e.Config.Name,
		Scheme:        e.Config.PeerTLSInfo().Scheme(),
		URL:           e.Config.Peer.Addr,
		SnapshotCount: e.Config.SnapshotCount,
		RetryTimes:    e.Config.MaxRetryAttempts,
		RetryInterval: e.Config.RetryInterval,
	}
	e.PeerServer = server.NewPeerServer(psConfig, e.Registry, e.Store, &mb, followersStats, serverStats)

	// Create raft transporter and server
	raftTransporter := server.NewTransporter(followersStats, serverStats, e.Registry, heartbeatInterval, dialTimeout, responseHeaderTimeout)
	if psConfig.Scheme == "https" {
		raftClientTLSConfig, err := e.Config.PeerTLSInfo().ClientConfig()
		if err != nil {
			log.Fatal("raft client TLS error: ", err)
		}
		raftTransporter.SetTLSConfig(*raftClientTLSConfig)
	}
	raftServer, err := raft.NewServer(e.Config.Name, e.Config.DataDir, raftTransporter, e.Store, e.PeerServer, "")
	if err != nil {
		log.Fatal(err)
	}
	raftServer.SetElectionTimeout(electionTimeout)
	raftServer.SetHeartbeatInterval(heartbeatInterval)
	e.PeerServer.SetRaftServer(raftServer)

	// Create etcd server
	e.Server = server.New(e.Config.Name, e.Config.Addr, e.PeerServer, e.Registry, e.Store, &mb)

	if e.Config.Trace() {
		e.Server.EnableTracing()
	}

	e.PeerServer.SetServer(e.Server)

	// Generating config could be slow.
	// Put it here to make listen happen immediately after peer-server starting.
	peerTLSConfig := server.TLSServerConfig(e.Config.PeerTLSInfo())
	etcdTLSConfig := server.TLSServerConfig(e.Config.EtcdTLSInfo())

	log.Infof("etcd server [name %s, listen on %s, advertised url %s]", e.Server.Name, e.Config.BindAddr, e.Server.URL())
	e.listener = server.NewListener(e.Config.EtcdTLSInfo().Scheme(), e.Config.BindAddr, etcdTLSConfig)

	close(e.readyC) // etcd server is ready to accept connections, notify waiters.

	// An error string equivalent to net.errClosing for using with
	// http.Serve() during server shutdown. Need to re-declare
	// here because it is not exported by "net" package.
	const errClosing = "use of closed network connection"

	peerServerClosed := make(chan bool)
	go func() {
		// Starting peer server should be followed close by listening on its port
		// If not, it may leave many requests unaccepted, or cannot receive heartbeat from the cluster.
		// One severe problem caused if failing receiving heartbeats is when the second node joins one-node cluster,
		// the cluster could be out of work as long as the two nodes cannot transfer messages.
		e.PeerServer.Start(e.Config.Snapshot, e.Config.Discovery, e.Config.Peers)

		log.Infof("peer server [name %s, listen on %s, advertised url %s]", e.PeerServer.Config.Name, e.Config.Peer.BindAddr, e.PeerServer.Config.URL)
		e.peerListener = server.NewListener(psConfig.Scheme, e.Config.Peer.BindAddr, peerTLSConfig)

		sHTTP := &ehttp.CORSHandler{e.PeerServer.HTTPHandler(), corsInfo}
		if err = http.Serve(e.peerListener, sHTTP); err != nil {
			if !strings.Contains(err.Error(), errClosing) {
				log.Fatal(err)
			}
		}
		close(peerServerClosed)
	}()

	sHTTP := &ehttp.CORSHandler{e.Server.HTTPHandler(), corsInfo}
	if err = http.Serve(e.listener, sHTTP); err != nil {
		if !strings.Contains(err.Error(), errClosing) {
			log.Fatal(err)
		}
	}

	<-peerServerClosed
	log.Infof("etcd instance is stopped [name %s]", e.Config.Name)
}
Ejemplo n.º 9
0
// Starts a server in a temporary directory.
func RunServer(f func(*server.Server)) {
	path, _ := ioutil.TempDir("", "etcd-")
	defer os.RemoveAll(path)

	store := store.New()
	registry := server.NewRegistry(store)

	serverStats := server.NewRaftServerStats(testName)
	followersStats := server.NewRaftFollowersStats(testName)

	psConfig := server.PeerServerConfig{
		Name:           testName,
		URL:            "http://" + testRaftURL,
		Scheme:         "http",
		SnapshotCount:  testSnapshotCount,
		MaxClusterSize: 9,
	}
	ps := server.NewPeerServer(psConfig, registry, store, nil, followersStats, serverStats)
	psListener, err := server.NewListener(testRaftURL)
	if err != nil {
		panic(err)
	}

	// Create Raft transporter and server
	dialTimeout := (3 * testHeartbeatTimeout) + testElectionTimeout
	responseHeaderTimeout := (3 * testHeartbeatTimeout) + testElectionTimeout
	raftTransporter := server.NewTransporter(followersStats, serverStats, registry, testHeartbeatTimeout, dialTimeout, responseHeaderTimeout)
	raftServer, err := raft.NewServer(testName, path, raftTransporter, store, ps, "")
	if err != nil {
		panic(err)
	}
	raftServer.SetElectionTimeout(testElectionTimeout)
	raftServer.SetHeartbeatTimeout(testHeartbeatTimeout)
	ps.SetRaftServer(raftServer)

	s := server.New(testName, "http://"+testClientURL, ps, registry, store, nil)
	sListener, err := server.NewListener(testClientURL)
	if err != nil {
		panic(err)
	}

	ps.SetServer(s)

	// Start up peer server.
	c := make(chan bool)
	go func() {
		c <- true
		ps.Start(false, []string{})
		http.Serve(psListener, ps.HTTPHandler())
	}()
	<-c

	// Start up etcd server.
	go func() {
		c <- true
		http.Serve(sListener, s.HTTPHandler())
	}()
	<-c

	// Wait to make sure servers have started.
	time.Sleep(50 * time.Millisecond)

	// Execute the function passed in.
	f(s)

	// Clean up servers.
	ps.Stop()
	psListener.Close()
	sListener.Close()
}