Golang v3rpc.Server函数代码示例

// Launch starts a member based on ServerConfig, PeerListeners
// and ClientListeners.
func (m *member) Launch() error {
	plog.Printf("launching %s (%s)", m.Name, m.grpcAddr)
	var err error
	if m.s, err = etcdserver.NewServer(&m.ServerConfig); err != nil {
		return fmt.Errorf("failed to initialize the etcd server: %v", err)
	}
	m.s.SyncTicker = time.Tick(500 * time.Millisecond)
	m.s.Start()

	m.raftHandler = &testutil.PauseableHandler{Next: v2http.NewPeerHandler(m.s)}

	for _, ln := range m.PeerListeners {
		hs := &httptest.Server{
			Listener: ln,
			Config:   &http.Server{Handler: m.raftHandler},
		}
		if m.PeerTLSInfo == nil {
			hs.Start()
		} else {
			hs.TLS, err = m.PeerTLSInfo.ServerConfig()
			if err != nil {
				return err
			}
			hs.StartTLS()
		}
		m.hss = append(m.hss, hs)
	}
	for _, ln := range m.ClientListeners {
		hs := &httptest.Server{
			Listener: ln,
			Config:   &http.Server{Handler: v2http.NewClientHandler(m.s, m.ServerConfig.ReqTimeout())},
		}
		if m.ClientTLSInfo == nil {
			hs.Start()
		} else {
			hs.TLS, err = m.ClientTLSInfo.ServerConfig()
			if err != nil {
				return err
			}
			hs.StartTLS()
		}
		m.hss = append(m.hss, hs)
	}
	if m.grpcListener != nil {
		var (
			tlscfg *tls.Config
		)
		if m.ClientTLSInfo != nil && !m.ClientTLSInfo.Empty() {
			tlscfg, err = m.ClientTLSInfo.ServerConfig()
			if err != nil {
				return err
			}
		}
		m.grpcServer = v3rpc.Server(m.s, tlscfg)
		go m.grpcServer.Serve(m.grpcListener)
	}

	plog.Printf("launched %s (%s)", m.Name, m.grpcAddr)
	return nil
}

// serve accepts incoming connections on the listener l,
// creating a new service goroutine for each. The service goroutines
// read requests and then call handler to reply to them.
func serve(sctx *serveCtx, s *etcdserver.EtcdServer, tlscfg *tls.Config, handler http.Handler) error {
	logger := defaultLog.New(ioutil.Discard, "etcdhttp", 0)

	<-s.ReadyNotify()
	plog.Info("ready to serve client requests")

	m := cmux.New(sctx.l)

	if sctx.insecure {
		gs := v3rpc.Server(s, nil)
		grpcl := m.Match(cmux.HTTP2())
		go func() { plog.Fatal(gs.Serve(grpcl)) }()

		srvhttp := &http.Server{
			Handler:  handler,
			ErrorLog: logger, // do not log user error
		}
		httpl := m.Match(cmux.HTTP1())
		go func() { plog.Fatal(srvhttp.Serve(httpl)) }()
		plog.Noticef("serving insecure client requests on %s, this is strongly discouraged!", sctx.host)
	}

	if sctx.secure {
		gs := v3rpc.Server(s, tlscfg)
		handler = grpcHandlerFunc(gs, handler)

		tlsl := tls.NewListener(m.Match(cmux.Any()), tlscfg)
		// TODO: add debug flag; enable logging when debug flag is set
		srv := &http.Server{
			Handler:   handler,
			TLSConfig: tlscfg,
			ErrorLog:  logger, // do not log user error
		}
		go func() { plog.Fatal(srv.Serve(tlsl)) }()

		plog.Infof("serving client requests on %s", sctx.host)
	}

	return m.Serve()
}

// Launch starts a member based on ServerConfig, PeerListeners
// and ClientListeners.
func (m *member) Launch() error {
	var err error
	if m.s, err = etcdserver.NewServer(&m.ServerConfig); err != nil {
		return fmt.Errorf("failed to initialize the etcd server: %v", err)
	}
	m.s.SyncTicker = time.Tick(500 * time.Millisecond)
	m.s.Start()

	m.raftHandler = &testutil.PauseableHandler{Next: etcdhttp.NewPeerHandler(m.s)}

	for _, ln := range m.PeerListeners {
		hs := &httptest.Server{
			Listener: ln,
			Config:   &http.Server{Handler: m.raftHandler},
		}
		if m.PeerTLSInfo == nil {
			hs.Start()
		} else {
			hs.TLS, err = m.PeerTLSInfo.ServerConfig()
			if err != nil {
				return err
			}
			hs.StartTLS()
		}
		m.hss = append(m.hss, hs)
	}
	for _, ln := range m.ClientListeners {
		hs := &httptest.Server{
			Listener: ln,
			Config:   &http.Server{Handler: etcdhttp.NewClientHandler(m.s, m.ServerConfig.ReqTimeout())},
		}
		if m.ClientTLSInfo == nil {
			hs.Start()
		} else {
			hs.TLS, err = m.ClientTLSInfo.ServerConfig()
			if err != nil {
				return err
			}
			hs.StartTLS()
		}
		m.hss = append(m.hss, hs)
	}
	if m.grpcListener != nil {
		m.grpcServer, err = v3rpc.Server(m.s, m.ClientTLSInfo)
		go m.grpcServer.Serve(m.grpcListener)
	}
	return nil
}

// serve accepts incoming connections on the listener l,
// creating a new service goroutine for each. The service goroutines
// read requests and then call handler to reply to them.
func serve(sctx *serveCtx, s *etcdserver.EtcdServer, tlscfg *tls.Config, handler http.Handler) error {
	logger := defaultLog.New(ioutil.Discard, "etcdhttp", 0)

	<-s.ReadyNotify()
	plog.Info("ready to serve client requests")

	m := cmux.New(sctx.l)

	if sctx.insecure {
		gs := v3rpc.Server(s, nil)
		grpcl := m.Match(cmux.HTTP2())
		go func() { plog.Fatal(gs.Serve(grpcl)) }()

		opts := []grpc.DialOption{
			grpc.WithInsecure(),
		}
		gwmux, err := registerGateway(sctx.l.Addr().String(), opts)
		if err != nil {
			return err
		}

		httpmux := http.NewServeMux()
		httpmux.Handle("/v3alpha/", gwmux)
		httpmux.Handle("/", handler)
		srvhttp := &http.Server{
			Handler:  httpmux,
			ErrorLog: logger, // do not log user error
		}
		httpl := m.Match(cmux.HTTP1())
		go func() { plog.Fatal(srvhttp.Serve(httpl)) }()
		plog.Noticef("serving insecure client requests on %s, this is strongly discouraged!", sctx.host)
	}

	if sctx.secure {
		gs := v3rpc.Server(s, tlscfg)
		handler = grpcHandlerFunc(gs, handler)

		dtls := *tlscfg
		// trust local server
		dtls.InsecureSkipVerify = true
		creds := credentials.NewTLS(&dtls)
		opts := []grpc.DialOption{grpc.WithTransportCredentials(creds)}
		gwmux, err := registerGateway(sctx.l.Addr().String(), opts)
		if err != nil {
			return err
		}

		tlsl := tls.NewListener(m.Match(cmux.Any()), tlscfg)
		// TODO: add debug flag; enable logging when debug flag is set
		httpmux := http.NewServeMux()
		httpmux.Handle("/v3alpha/", gwmux)
		httpmux.Handle("/", handler)
		srv := &http.Server{
			Handler:   httpmux,
			TLSConfig: tlscfg,
			ErrorLog:  logger, // do not log user error
		}
		go func() { plog.Fatal(srv.Serve(tlsl)) }()

		plog.Infof("serving client requests on %s", sctx.host)
	}

	return m.Serve()
}

// startEtcd launches the etcd server and HTTP handlers for client/server communication.
func startEtcd(cfg *config) (<-chan struct{}, error) {
	urlsmap, token, err := getPeerURLsMapAndToken(cfg, "etcd")
	if err != nil {
		return nil, fmt.Errorf("error setting up initial cluster: %v", err)
	}

	if !cfg.peerTLSInfo.Empty() {
		plog.Infof("peerTLS: %s", cfg.peerTLSInfo)
	}
	plns := make([]net.Listener, 0)
	for _, u := range cfg.lpurls {
		if u.Scheme == "http" && !cfg.peerTLSInfo.Empty() {
			plog.Warningf("The scheme of peer url %s is http while peer key/cert files are presented. Ignored peer key/cert files.", u.String())
		}
		var l net.Listener
		l, err = rafthttp.NewListener(u, cfg.peerTLSInfo)
		if err != nil {
			return nil, err
		}

		urlStr := u.String()
		plog.Info("listening for peers on ", urlStr)
		defer func() {
			if err != nil {
				l.Close()
				plog.Info("stopping listening for peers on ", urlStr)
			}
		}()
		plns = append(plns, l)
	}

	if !cfg.clientTLSInfo.Empty() {
		plog.Infof("clientTLS: %s", cfg.clientTLSInfo)
	}
	clns := make([]net.Listener, 0)
	for _, u := range cfg.lcurls {
		if u.Scheme == "http" && !cfg.clientTLSInfo.Empty() {
			plog.Warningf("The scheme of client url %s is http while client key/cert files are presented. Ignored client key/cert files.", u.String())
		}
		var l net.Listener
		l, err = net.Listen("tcp", u.Host)
		if err != nil {
			return nil, err
		}

		if fdLimit, err := runtimeutil.FDLimit(); err == nil {
			if fdLimit <= reservedInternalFDNum {
				plog.Fatalf("file descriptor limit[%d] of etcd process is too low, and should be set higher than %d to ensure internal usage", fdLimit, reservedInternalFDNum)
			}
			l = transport.LimitListener(l, int(fdLimit-reservedInternalFDNum))
		}

		// Do not wrap around this listener if TLS Info is set.
		// HTTPS server expects TLS Conn created by TLSListener.
		l, err = transport.NewKeepAliveListener(l, u.Scheme, cfg.clientTLSInfo)
		if err != nil {
			return nil, err
		}

		urlStr := u.String()
		plog.Info("listening for client requests on ", urlStr)
		defer func() {
			if err != nil {
				l.Close()
				plog.Info("stopping listening for client requests on ", urlStr)
			}
		}()
		clns = append(clns, l)
	}

	var v3l net.Listener
	if cfg.v3demo {
		v3l, err = net.Listen("tcp", cfg.gRPCAddr)
		if err != nil {
			plog.Fatal(err)
		}
		plog.Infof("listening for client rpc on %s", cfg.gRPCAddr)
	}

	srvcfg := &etcdserver.ServerConfig{
		Name:                    cfg.name,
		ClientURLs:              cfg.acurls,
		PeerURLs:                cfg.apurls,
		DataDir:                 cfg.dir,
		DedicatedWALDir:         cfg.walDir,
		SnapCount:               cfg.snapCount,
		MaxSnapFiles:            cfg.maxSnapFiles,
		MaxWALFiles:             cfg.maxWalFiles,
		InitialPeerURLsMap:      urlsmap,
		InitialClusterToken:     token,
		DiscoveryURL:            cfg.durl,
		DiscoveryProxy:          cfg.dproxy,
		NewCluster:              cfg.isNewCluster(),
		ForceNewCluster:         cfg.forceNewCluster,
		PeerTLSInfo:             cfg.peerTLSInfo,
		TickMs:                  cfg.TickMs,
		ElectionTicks:           cfg.electionTicks(),
		V3demo:                  cfg.v3demo,
		AutoCompactionRetention: cfg.autoCompactionRetention,
//.........这里部分代码省略.........