예제 #1
0
파일: server.go 프로젝트: dnaeon/etcd
// NewServer creates a new EtcdServer from the supplied configuration. The
// configuration is considered static for the lifetime of the EtcdServer.
func NewServer(cfg *ServerConfig) (srv *EtcdServer, err error) {
	st := store.New(StoreClusterPrefix, StoreKeysPrefix)

	var (
		w  *wal.WAL
		n  raft.Node
		s  *raft.MemoryStorage
		id types.ID
		cl *membership.RaftCluster
	)

	if terr := fileutil.TouchDirAll(cfg.DataDir); terr != nil {
		return nil, fmt.Errorf("cannot access data directory: %v", terr)
	}

	// Run the migrations.
	dataVer, err := version.DetectDataDir(cfg.DataDir)
	if err != nil {
		return nil, err
	}
	if err = upgradeDataDir(cfg.DataDir, cfg.Name, dataVer); err != nil {
		return nil, err
	}

	haveWAL := wal.Exist(cfg.WALDir())

	if err = os.MkdirAll(cfg.SnapDir(), privateDirMode); err != nil && !os.IsExist(err) {
		plog.Fatalf("create snapshot directory error: %v", err)
	}
	ss := snap.New(cfg.SnapDir())
	be := backend.NewDefaultBackend(path.Join(cfg.SnapDir(), databaseFilename))
	defer func() {
		if err != nil {
			be.Close()
		}
	}()

	prt, err := rafthttp.NewRoundTripper(cfg.PeerTLSInfo, cfg.peerDialTimeout())
	if err != nil {
		return nil, err
	}
	var remotes []*membership.Member
	switch {
	case !haveWAL && !cfg.NewCluster:
		if err = cfg.VerifyJoinExisting(); err != nil {
			return nil, err
		}
		cl, err = membership.NewClusterFromURLsMap(cfg.InitialClusterToken, cfg.InitialPeerURLsMap)
		if err != nil {
			return nil, err
		}
		existingCluster, gerr := GetClusterFromRemotePeers(getRemotePeerURLs(cl, cfg.Name), prt)
		if gerr != nil {
			return nil, fmt.Errorf("cannot fetch cluster info from peer urls: %v", gerr)
		}
		if err = membership.ValidateClusterAndAssignIDs(cl, existingCluster); err != nil {
			return nil, fmt.Errorf("error validating peerURLs %s: %v", existingCluster, err)
		}
		if !isCompatibleWithCluster(cl, cl.MemberByName(cfg.Name).ID, prt) {
			return nil, fmt.Errorf("incomptible with current running cluster")
		}

		remotes = existingCluster.Members()
		cl.SetID(existingCluster.ID())
		cl.SetStore(st)
		cl.SetBackend(be)
		cfg.Print()
		id, n, s, w = startNode(cfg, cl, nil)
	case !haveWAL && cfg.NewCluster:
		if err = cfg.VerifyBootstrap(); err != nil {
			return nil, err
		}
		cl, err = membership.NewClusterFromURLsMap(cfg.InitialClusterToken, cfg.InitialPeerURLsMap)
		if err != nil {
			return nil, err
		}
		m := cl.MemberByName(cfg.Name)
		if isMemberBootstrapped(cl, cfg.Name, prt, cfg.bootstrapTimeout()) {
			return nil, fmt.Errorf("member %s has already been bootstrapped", m.ID)
		}
		if cfg.ShouldDiscover() {
			var str string
			str, err = discovery.JoinCluster(cfg.DiscoveryURL, cfg.DiscoveryProxy, m.ID, cfg.InitialPeerURLsMap.String())
			if err != nil {
				return nil, &DiscoveryError{Op: "join", Err: err}
			}
			var urlsmap types.URLsMap
			urlsmap, err = types.NewURLsMap(str)
			if err != nil {
				return nil, err
			}
			if checkDuplicateURL(urlsmap) {
				return nil, fmt.Errorf("discovery cluster %s has duplicate url", urlsmap)
			}
			if cl, err = membership.NewClusterFromURLsMap(cfg.InitialClusterToken, urlsmap); err != nil {
				return nil, err
			}
		}
		cl.SetStore(st)
		cl.SetBackend(be)
		cfg.PrintWithInitial()
		id, n, s, w = startNode(cfg, cl, cl.MemberIDs())
	case haveWAL:
		if err = fileutil.IsDirWriteable(cfg.MemberDir()); err != nil {
			return nil, fmt.Errorf("cannot write to member directory: %v", err)
		}

		if err = fileutil.IsDirWriteable(cfg.WALDir()); err != nil {
			return nil, fmt.Errorf("cannot write to WAL directory: %v", err)
		}

		if cfg.ShouldDiscover() {
			plog.Warningf("discovery token ignored since a cluster has already been initialized. Valid log found at %q", cfg.WALDir())
		}
		var snapshot *raftpb.Snapshot
		snapshot, err = ss.Load()
		if err != nil && err != snap.ErrNoSnapshot {
			return nil, err
		}
		if snapshot != nil {
			if err = st.Recovery(snapshot.Data); err != nil {
				plog.Panicf("recovered store from snapshot error: %v", err)
			}
			plog.Infof("recovered store from snapshot at index %d", snapshot.Metadata.Index)
		}
		cfg.Print()
		if !cfg.ForceNewCluster {
			id, cl, n, s, w = restartNode(cfg, snapshot)
		} else {
			id, cl, n, s, w = restartAsStandaloneNode(cfg, snapshot)
		}
		cl.SetStore(st)
		cl.SetBackend(be)
		cl.Recover()
	default:
		return nil, fmt.Errorf("unsupported bootstrap config")
	}

	if terr := fileutil.TouchDirAll(cfg.MemberDir()); terr != nil {
		return nil, fmt.Errorf("cannot access member directory: %v", terr)
	}

	sstats := &stats.ServerStats{
		Name: cfg.Name,
		ID:   id.String(),
	}
	sstats.Initialize()
	lstats := stats.NewLeaderStats(id.String())

	srv = &EtcdServer{
		readych:   make(chan struct{}),
		Cfg:       cfg,
		snapCount: cfg.SnapCount,
		errorc:    make(chan error, 1),
		store:     st,
		r: raftNode{
			Node:        n,
			ticker:      time.Tick(time.Duration(cfg.TickMs) * time.Millisecond),
			raftStorage: s,
			storage:     NewStorage(w, ss),
		},
		id:            id,
		attributes:    membership.Attributes{Name: cfg.Name, ClientURLs: cfg.ClientURLs.StringSlice()},
		cluster:       cl,
		stats:         sstats,
		lstats:        lstats,
		SyncTicker:    time.Tick(500 * time.Millisecond),
		peerRt:        prt,
		reqIDGen:      idutil.NewGenerator(uint16(id), time.Now()),
		forceVersionC: make(chan struct{}),
		msgSnapC:      make(chan raftpb.Message, maxInFlightMsgSnap),
	}

	srv.applyV2 = &applierV2store{store: srv.store, cluster: srv.cluster}

	srv.be = be
	srv.lessor = lease.NewLessor(srv.be)
	srv.kv = mvcc.New(srv.be, srv.lessor, &srv.consistIndex)
	srv.consistIndex.setConsistentIndex(srv.kv.ConsistentIndex())
	srv.authStore = auth.NewAuthStore(srv.be)
	if h := cfg.AutoCompactionRetention; h != 0 {
		srv.compactor = compactor.NewPeriodic(h, srv.kv, srv)
		srv.compactor.Run()
	}

	if err = srv.restoreAlarms(); err != nil {
		return nil, err
	}

	// TODO: move transport initialization near the definition of remote
	tr := &rafthttp.Transport{
		TLSInfo:     cfg.PeerTLSInfo,
		DialTimeout: cfg.peerDialTimeout(),
		ID:          id,
		URLs:        cfg.PeerURLs,
		ClusterID:   cl.ID(),
		Raft:        srv,
		Snapshotter: ss,
		ServerStats: sstats,
		LeaderStats: lstats,
		ErrorC:      srv.errorc,
	}
	if err = tr.Start(); err != nil {
		return nil, err
	}
	// add all remotes into transport
	for _, m := range remotes {
		if m.ID != id {
			tr.AddRemote(m.ID, m.PeerURLs)
		}
	}
	for _, m := range cl.Members() {
		if m.ID != id {
			tr.AddPeer(m.ID, m.PeerURLs)
		}
	}
	srv.r.transport = tr

	return srv, nil
}
예제 #2
0
// NewServer creates a new EtcdServer from the supplied configuration. The
// configuration is considered static for the lifetime of the EtcdServer.
func NewServer(cfg *ServerConfig) (srv *EtcdServer, err error) {
	st := store.New(StoreClusterPrefix, StoreKeysPrefix)

	var (
		w  *wal.WAL
		n  raft.Node
		s  *raft.MemoryStorage
		id types.ID
		cl *membership.RaftCluster
	)

	if terr := fileutil.TouchDirAll(cfg.DataDir); terr != nil {
		return nil, fmt.Errorf("cannot access data directory: %v", terr)
	}

	haveWAL := wal.Exist(cfg.WALDir())

	if err = fileutil.TouchDirAll(cfg.SnapDir()); err != nil {
		plog.Fatalf("create snapshot directory error: %v", err)
	}
	ss := snap.New(cfg.SnapDir())

	bepath := path.Join(cfg.SnapDir(), databaseFilename)
	beExist := fileutil.Exist(bepath)

	var be backend.Backend
	beOpened := make(chan struct{})
	go func() {
		be = backend.NewDefaultBackend(bepath)
		beOpened <- struct{}{}
	}()

	select {
	case <-beOpened:
	case <-time.After(time.Second):
		plog.Warningf("another etcd process is running with the same data dir and holding the file lock.")
		plog.Warningf("waiting for it to exit before starting...")
		<-beOpened
	}

	defer func() {
		if err != nil {
			be.Close()
		}
	}()

	prt, err := rafthttp.NewRoundTripper(cfg.PeerTLSInfo, cfg.peerDialTimeout())
	if err != nil {
		return nil, err
	}
	var (
		remotes  []*membership.Member
		snapshot *raftpb.Snapshot
	)

	switch {
	case !haveWAL && !cfg.NewCluster:
		if err = cfg.VerifyJoinExisting(); err != nil {
			return nil, err
		}
		cl, err = membership.NewClusterFromURLsMap(cfg.InitialClusterToken, cfg.InitialPeerURLsMap)
		if err != nil {
			return nil, err
		}
		existingCluster, gerr := GetClusterFromRemotePeers(getRemotePeerURLs(cl, cfg.Name), prt)
		if gerr != nil {
			return nil, fmt.Errorf("cannot fetch cluster info from peer urls: %v", gerr)
		}
		if err = membership.ValidateClusterAndAssignIDs(cl, existingCluster); err != nil {
			return nil, fmt.Errorf("error validating peerURLs %s: %v", existingCluster, err)
		}
		if !isCompatibleWithCluster(cl, cl.MemberByName(cfg.Name).ID, prt) {
			return nil, fmt.Errorf("incompatible with current running cluster")
		}

		remotes = existingCluster.Members()
		cl.SetID(existingCluster.ID())
		cl.SetStore(st)
		cl.SetBackend(be)
		cfg.Print()
		id, n, s, w = startNode(cfg, cl, nil)
	case !haveWAL && cfg.NewCluster:
		if err = cfg.VerifyBootstrap(); err != nil {
			return nil, err
		}
		cl, err = membership.NewClusterFromURLsMap(cfg.InitialClusterToken, cfg.InitialPeerURLsMap)
		if err != nil {
			return nil, err
		}
		m := cl.MemberByName(cfg.Name)
		if isMemberBootstrapped(cl, cfg.Name, prt, cfg.bootstrapTimeout()) {
			return nil, fmt.Errorf("member %s has already been bootstrapped", m.ID)
		}
		if cfg.ShouldDiscover() {
			var str string
			str, err = discovery.JoinCluster(cfg.DiscoveryURL, cfg.DiscoveryProxy, m.ID, cfg.InitialPeerURLsMap.String())
			if err != nil {
				return nil, &DiscoveryError{Op: "join", Err: err}
			}
			var urlsmap types.URLsMap
			urlsmap, err = types.NewURLsMap(str)
			if err != nil {
				return nil, err
			}
			if checkDuplicateURL(urlsmap) {
				return nil, fmt.Errorf("discovery cluster %s has duplicate url", urlsmap)
			}
			if cl, err = membership.NewClusterFromURLsMap(cfg.InitialClusterToken, urlsmap); err != nil {
				return nil, err
			}
		}
		cl.SetStore(st)
		cl.SetBackend(be)
		cfg.PrintWithInitial()
		id, n, s, w = startNode(cfg, cl, cl.MemberIDs())
	case haveWAL:
		if err = fileutil.IsDirWriteable(cfg.MemberDir()); err != nil {
			return nil, fmt.Errorf("cannot write to member directory: %v", err)
		}

		if err = fileutil.IsDirWriteable(cfg.WALDir()); err != nil {
			return nil, fmt.Errorf("cannot write to WAL directory: %v", err)
		}

		if cfg.ShouldDiscover() {
			plog.Warningf("discovery token ignored since a cluster has already been initialized. Valid log found at %q", cfg.WALDir())
		}
		snapshot, err = ss.Load()
		if err != nil && err != snap.ErrNoSnapshot {
			return nil, err
		}
		if snapshot != nil {
			if err = st.Recovery(snapshot.Data); err != nil {
				plog.Panicf("recovered store from snapshot error: %v", err)
			}
			plog.Infof("recovered store from snapshot at index %d", snapshot.Metadata.Index)
		}
		cfg.Print()
		if !cfg.ForceNewCluster {
			id, cl, n, s, w = restartNode(cfg, snapshot)
		} else {
			id, cl, n, s, w = restartAsStandaloneNode(cfg, snapshot)
		}
		cl.SetStore(st)
		cl.SetBackend(be)
		cl.Recover(api.UpdateCapability)
		if cl.Version() != nil && !cl.Version().LessThan(semver.Version{Major: 3}) && !beExist {
			os.RemoveAll(bepath)
			return nil, fmt.Errorf("database file (%v) of the backend is missing", bepath)
		}
	default:
		return nil, fmt.Errorf("unsupported bootstrap config")
	}

	if terr := fileutil.TouchDirAll(cfg.MemberDir()); terr != nil {
		return nil, fmt.Errorf("cannot access member directory: %v", terr)
	}

	sstats := &stats.ServerStats{
		Name: cfg.Name,
		ID:   id.String(),
	}
	sstats.Initialize()
	lstats := stats.NewLeaderStats(id.String())

	heartbeat := time.Duration(cfg.TickMs) * time.Millisecond
	srv = &EtcdServer{
		readych:   make(chan struct{}),
		Cfg:       cfg,
		snapCount: cfg.SnapCount,
		errorc:    make(chan error, 1),
		store:     st,
		r: raftNode{
			isIDRemoved: func(id uint64) bool { return cl.IsIDRemoved(types.ID(id)) },
			Node:        n,
			ticker:      time.Tick(heartbeat),
			// set up contention detectors for raft heartbeat message.
			// expect to send a heartbeat within 2 heartbeat intervals.
			td:          contention.NewTimeoutDetector(2 * heartbeat),
			heartbeat:   heartbeat,
			raftStorage: s,
			storage:     NewStorage(w, ss),
			msgSnapC:    make(chan raftpb.Message, maxInFlightMsgSnap),
			readStateC:  make(chan raft.ReadState, 1),
		},
		id:            id,
		attributes:    membership.Attributes{Name: cfg.Name, ClientURLs: cfg.ClientURLs.StringSlice()},
		cluster:       cl,
		stats:         sstats,
		lstats:        lstats,
		SyncTicker:    time.Tick(500 * time.Millisecond),
		peerRt:        prt,
		reqIDGen:      idutil.NewGenerator(uint16(id), time.Now()),
		forceVersionC: make(chan struct{}),
	}

	srv.applyV2 = &applierV2store{store: srv.store, cluster: srv.cluster}

	srv.be = be
	minTTL := time.Duration((3*cfg.ElectionTicks)/2) * heartbeat

	// always recover lessor before kv. When we recover the mvcc.KV it will reattach keys to its leases.
	// If we recover mvcc.KV first, it will attach the keys to the wrong lessor before it recovers.
	srv.lessor = lease.NewLessor(srv.be, int64(math.Ceil(minTTL.Seconds())))
	srv.kv = mvcc.New(srv.be, srv.lessor, &srv.consistIndex)
	if beExist {
		kvindex := srv.kv.ConsistentIndex()
		// TODO: remove kvindex != 0 checking when we do not expect users to upgrade
		// etcd from pre-3.0 release.
		if snapshot != nil && kvindex < snapshot.Metadata.Index {
			if kvindex != 0 {
				return nil, fmt.Errorf("database file (%v index %d) does not match with snapshot (index %d).", bepath, kvindex, snapshot.Metadata.Index)
			}
			plog.Warningf("consistent index never saved (snapshot index=%d)", snapshot.Metadata.Index)
		}
	}
	srv.consistIndex.setConsistentIndex(srv.kv.ConsistentIndex())

	srv.authStore = auth.NewAuthStore(srv.be)
	if h := cfg.AutoCompactionRetention; h != 0 {
		srv.compactor = compactor.NewPeriodic(h, srv.kv, srv)
		srv.compactor.Run()
	}

	srv.applyV3Base = &applierV3backend{srv}
	if err = srv.restoreAlarms(); err != nil {
		return nil, err
	}

	// TODO: move transport initialization near the definition of remote
	tr := &rafthttp.Transport{
		TLSInfo:     cfg.PeerTLSInfo,
		DialTimeout: cfg.peerDialTimeout(),
		ID:          id,
		URLs:        cfg.PeerURLs,
		ClusterID:   cl.ID(),
		Raft:        srv,
		Snapshotter: ss,
		ServerStats: sstats,
		LeaderStats: lstats,
		ErrorC:      srv.errorc,
	}
	if err = tr.Start(); err != nil {
		return nil, err
	}
	// add all remotes into transport
	for _, m := range remotes {
		if m.ID != id {
			tr.AddRemote(m.ID, m.PeerURLs)
		}
	}
	for _, m := range cl.Members() {
		if m.ID != id {
			tr.AddPeer(m.ID, m.PeerURLs)
		}
	}
	srv.r.transport = tr

	return srv, nil
}
예제 #3
0
// NewServer creates a new EtcdServer from the supplied configuration. The
// configuration is considered static for the lifetime of the EtcdServer.
func NewServer(cfg *ServerConfig) (*EtcdServer, error) {
	st := store.New(StoreClusterPrefix, StoreKeysPrefix)
	var w *wal.WAL
	var n raft.Node
	var s *raft.MemoryStorage
	var id types.ID
	var cl *cluster

	// Run the migrations.
	dataVer, err := version.DetectDataDir(cfg.DataDir)
	if err != nil {
		return nil, err
	}
	if err := upgradeDataDir(cfg.DataDir, cfg.Name, dataVer); err != nil {
		return nil, err
	}

	haveWAL := wal.Exist(cfg.WALDir())
	ss := snap.New(cfg.SnapDir())

	var remotes []*Member
	switch {
	case !haveWAL && !cfg.NewCluster:
		if err := cfg.VerifyJoinExisting(); err != nil {
			return nil, err
		}
		cl, err = newClusterFromURLsMap(cfg.InitialClusterToken, cfg.InitialPeerURLsMap)
		if err != nil {
			return nil, err
		}
		existingCluster, err := GetClusterFromRemotePeers(getRemotePeerURLs(cl, cfg.Name), cfg.Transport)
		if err != nil {
			return nil, fmt.Errorf("cannot fetch cluster info from peer urls: %v", err)
		}
		if err := ValidateClusterAndAssignIDs(cl, existingCluster); err != nil {
			return nil, fmt.Errorf("error validating peerURLs %s: %v", existingCluster, err)
		}
		if !isCompatibleWithCluster(cl, cl.MemberByName(cfg.Name).ID, cfg.Transport) {
			return nil, fmt.Errorf("incomptible with current running cluster")
		}

		remotes = existingCluster.Members()
		cl.SetID(existingCluster.id)
		cl.SetStore(st)
		cfg.Print()
		id, n, s, w = startNode(cfg, cl, nil)
	case !haveWAL && cfg.NewCluster:
		if err := cfg.VerifyBootstrap(); err != nil {
			return nil, err
		}
		cl, err = newClusterFromURLsMap(cfg.InitialClusterToken, cfg.InitialPeerURLsMap)
		if err != nil {
			return nil, err
		}
		m := cl.MemberByName(cfg.Name)
		if isMemberBootstrapped(cl, cfg.Name, cfg.Transport) {
			return nil, fmt.Errorf("member %s has already been bootstrapped", m.ID)
		}
		if cfg.ShouldDiscover() {
			str, err := discovery.JoinCluster(cfg.DiscoveryURL, cfg.DiscoveryProxy, m.ID, cfg.InitialPeerURLsMap.String())
			if err != nil {
				return nil, err
			}
			urlsmap, err := types.NewURLsMap(str)
			if err != nil {
				return nil, err
			}
			if checkDuplicateURL(urlsmap) {
				return nil, fmt.Errorf("discovery cluster %s has duplicate url", urlsmap)
			}
			if cl, err = newClusterFromURLsMap(cfg.InitialClusterToken, urlsmap); err != nil {
				return nil, err
			}
		}
		cl.SetStore(st)
		cfg.PrintWithInitial()
		id, n, s, w = startNode(cfg, cl, cl.MemberIDs())
	case haveWAL:
		if err := fileutil.IsDirWriteable(cfg.DataDir); err != nil {
			return nil, fmt.Errorf("cannot write to data directory: %v", err)
		}

		if err := fileutil.IsDirWriteable(cfg.MemberDir()); err != nil {
			return nil, fmt.Errorf("cannot write to member directory: %v", err)
		}

		if cfg.ShouldDiscover() {
			plog.Warningf("discovery token ignored since a cluster has already been initialized. Valid log found at %q", cfg.WALDir())
		}
		snapshot, err := ss.Load()
		if err != nil && err != snap.ErrNoSnapshot {
			return nil, err
		}
		if snapshot != nil {
			if err := st.Recovery(snapshot.Data); err != nil {
				plog.Panicf("recovered store from snapshot error: %v", err)
			}
			plog.Infof("recovered store from snapshot at index %d", snapshot.Metadata.Index)
		}
		cfg.Print()
		if snapshot != nil {
			plog.Infof("loaded cluster information from store: %s", cl)
		}
		if !cfg.ForceNewCluster {
			id, cl, n, s, w = restartNode(cfg, snapshot)
		} else {
			id, cl, n, s, w = restartAsStandaloneNode(cfg, snapshot)
		}
		cl.SetStore(st)
		cl.Recover()
	default:
		return nil, fmt.Errorf("unsupported bootstrap config")
	}

	sstats := &stats.ServerStats{
		Name: cfg.Name,
		ID:   id.String(),
	}
	sstats.Initialize()
	lstats := stats.NewLeaderStats(id.String())

	srv := &EtcdServer{
		cfg:       cfg,
		snapCount: cfg.SnapCount,
		errorc:    make(chan error, 1),
		store:     st,
		r: raftNode{
			Node:        n,
			ticker:      time.Tick(time.Duration(cfg.TickMs) * time.Millisecond),
			raftStorage: s,
			storage:     NewStorage(w, ss),
		},
		id:            id,
		attributes:    Attributes{Name: cfg.Name, ClientURLs: cfg.ClientURLs.StringSlice()},
		cluster:       cl,
		stats:         sstats,
		lstats:        lstats,
		SyncTicker:    time.Tick(500 * time.Millisecond),
		reqIDGen:      idutil.NewGenerator(uint8(id), time.Now()),
		forceVersionC: make(chan struct{}),
	}

	// TODO: move transport initialization near the definition of remote
	tr := rafthttp.NewTransporter(cfg.Transport, id, cl.ID(), srv, srv.errorc, sstats, lstats)
	// add all remotes into transport
	for _, m := range remotes {
		if m.ID != id {
			tr.AddRemote(m.ID, m.PeerURLs)
		}
	}
	for _, m := range cl.Members() {
		if m.ID != id {
			tr.AddPeer(m.ID, m.PeerURLs)
		}
	}
	srv.r.transport = tr
	return srv, nil
}
예제 #4
0
파일: main.go 프로젝트: ericcapricorn/etcd
// startEtcd launches the etcd server and HTTP handlers for client/server communication.
func startEtcd() {
	cls, err := setupCluster()
	if err != nil {
		log.Fatalf("etcd: error setting up initial cluster: %v", err)
	}

	if *dir == "" {
		*dir = fmt.Sprintf("%v.etcd", *name)
		log.Printf("etcd: no data-dir provided, using default data-dir ./%s", *dir)
	}
	if err := os.MkdirAll(*dir, privateDirMode); err != nil {
		log.Fatalf("etcd: cannot create data directory: %v", err)
	}
	if err := fileutil.IsDirWriteable(*dir); err != nil {
		log.Fatalf("etcd: cannot write to data directory: %v", err)
	}

	pt, err := transport.NewTransport(peerTLSInfo)
	if err != nil {
		log.Fatal(err)
	}

	acurls, err := flags.URLsFromFlags(fs, "advertise-client-urls", "addr", clientTLSInfo)
	if err != nil {
		log.Fatal(err.Error())
	}
	cfg := &etcdserver.ServerConfig{
		Name:         *name,
		ClientURLs:   acurls,
		DataDir:      *dir,
		SnapCount:    *snapCount,
		Cluster:      cls,
		DiscoveryURL: *durl,
		ClusterState: *clusterState,
		Transport:    pt,
	}
	s := etcdserver.NewServer(cfg)
	s.Start()

	ch := &cors.CORSHandler{
		Handler: etcdhttp.NewClientHandler(s),
		Info:    corsInfo,
	}
	ph := etcdhttp.NewPeerHandler(s)

	lpurls, err := flags.URLsFromFlags(fs, "listen-peer-urls", "peer-bind-addr", peerTLSInfo)
	if err != nil {
		log.Fatal(err.Error())
	}

	for _, u := range lpurls {
		l, err := transport.NewListener(u.Host, peerTLSInfo)
		if err != nil {
			log.Fatal(err)
		}

		// Start the peer server in a goroutine
		urlStr := u.String()
		go func() {
			log.Print("etcd: listening for peers on ", urlStr)
			log.Fatal(http.Serve(l, ph))
		}()
	}

	lcurls, err := flags.URLsFromFlags(fs, "listen-client-urls", "bind-addr", clientTLSInfo)
	if err != nil {
		log.Fatal(err.Error())
	}

	// Start a client server goroutine for each listen address
	for _, u := range lcurls {
		l, err := transport.NewListener(u.Host, clientTLSInfo)
		if err != nil {
			log.Fatal(err)
		}

		urlStr := u.String()
		go func() {
			log.Print("etcd: listening for client requests on ", urlStr)
			log.Fatal(http.Serve(l, ch))
		}()
	}
}
예제 #5
0
파일: etcd.go 프로젝트: dterei/etcd
// startEtcd launches the etcd server and HTTP handlers for client/server communication.
func startEtcd() (<-chan struct{}, error) {
	apurls, err := flags.URLsFromFlags(fs, "initial-advertise-peer-urls", "addr", peerTLSInfo)
	if err != nil {
		return nil, err
	}
	cls, err := setupCluster(apurls)
	if err != nil {
		return nil, fmt.Errorf("error setting up initial cluster: %v", err)
	}

	if *dir == "" {
		*dir = fmt.Sprintf("%v.etcd", *name)
		log.Printf("no data-dir provided, using default data-dir ./%s", *dir)
	}
	if err := os.MkdirAll(*dir, privateDirMode); err != nil {
		return nil, fmt.Errorf("cannot create data directory: %v", err)
	}
	if err := fileutil.IsDirWriteable(*dir); err != nil {
		return nil, fmt.Errorf("cannot write to data directory: %v", err)
	}

	pt, err := transport.NewTimeoutTransport(peerTLSInfo, rafthttp.ConnReadTimeout, rafthttp.ConnWriteTimeout)
	if err != nil {
		return nil, err
	}

	acurls, err := flags.URLsFromFlags(fs, "advertise-client-urls", "addr", clientTLSInfo)
	if err != nil {
		return nil, err
	}

	lpurls, err := flags.URLsFromFlags(fs, "listen-peer-urls", "peer-bind-addr", peerTLSInfo)
	if err != nil {
		return nil, err
	}

	if !peerTLSInfo.Empty() {
		log.Printf("etcd: peerTLS: %s", peerTLSInfo)
	}
	plns := make([]net.Listener, 0)
	for _, u := range lpurls {
		var l net.Listener
		l, err = transport.NewTimeoutListener(u.Host, u.Scheme, peerTLSInfo, rafthttp.ConnReadTimeout, rafthttp.ConnWriteTimeout)
		if err != nil {
			return nil, err
		}

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

	lcurls, err := flags.URLsFromFlags(fs, "listen-client-urls", "bind-addr", clientTLSInfo)
	if err != nil {
		return nil, err
	}

	if !clientTLSInfo.Empty() {
		log.Printf("etcd: clientTLS: %s", clientTLSInfo)
	}
	clns := make([]net.Listener, 0)
	for _, u := range lcurls {
		var l net.Listener
		l, err = transport.NewListener(u.Host, u.Scheme, clientTLSInfo)
		if err != nil {
			return nil, err
		}

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

	cfg := &etcdserver.ServerConfig{
		Name:            *name,
		ClientURLs:      acurls,
		PeerURLs:        apurls,
		DataDir:         *dir,
		SnapCount:       *snapCount,
		MaxSnapFiles:    *maxSnapFiles,
		MaxWALFiles:     *maxWalFiles,
		Cluster:         cls,
		DiscoveryURL:    *durl,
		DiscoveryProxy:  *dproxy,
		NewCluster:      clusterStateFlag.String() == clusterStateFlagNew,
		ForceNewCluster: *forceNewCluster,
		Transport:       pt,
	}
	var s *etcdserver.EtcdServer
	s, err = etcdserver.NewServer(cfg)
	if err != nil {
		return nil, err
	}
	s.Start()

	if corsInfo.String() != "" {
		log.Printf("etcd: cors = %s", corsInfo)
	}
	ch := &cors.CORSHandler{
		Handler: etcdhttp.NewClientHandler(s),
		Info:    corsInfo,
	}
	ph := etcdhttp.NewPeerHandler(s)
	// Start the peer server in a goroutine
	for _, l := range plns {
		go func(l net.Listener) {
			log.Fatal(http.Serve(l, ph))
		}(l)
	}
	// Start a client server goroutine for each listen address
	for _, l := range clns {
		go func(l net.Listener) {
			log.Fatal(http.Serve(l, ch))
		}(l)
	}
	return s.StopNotify(), nil
}
예제 #6
0
파일: etcd.go 프로젝트: CedarLogic/arangodb
// startEtcd launches the etcd server and HTTP handlers for client/server communication.
func startEtcd(cfg *config) (<-chan struct{}, error) {
	cls, err := setupCluster(cfg)
	if err != nil {
		return nil, fmt.Errorf("error setting up initial cluster: %v", err)
	}

	if cfg.dir == "" {
		cfg.dir = fmt.Sprintf("%v.etcd", cfg.name)
		log.Printf("no data-dir provided, using default data-dir ./%s", cfg.dir)
	}
	if err := makeMemberDir(cfg.dir); err != nil {
		return nil, fmt.Errorf("cannot use /member sub-directory: %v", err)
	}
	membdir := path.Join(cfg.dir, "member")
	if err := fileutil.IsDirWriteable(membdir); err != nil {
		return nil, fmt.Errorf("cannot write to data directory: %v", err)
	}

	pt, err := transport.NewTimeoutTransport(cfg.peerTLSInfo, rafthttp.ConnReadTimeout, rafthttp.ConnWriteTimeout)
	if err != nil {
		return nil, err
	}

	if !cfg.peerTLSInfo.Empty() {
		log.Printf("etcd: peerTLS: %s", cfg.peerTLSInfo)
	}
	plns := make([]net.Listener, 0)
	for _, u := range cfg.lpurls {
		var l net.Listener
		l, err = transport.NewTimeoutListener(u.Host, u.Scheme, cfg.peerTLSInfo, rafthttp.ConnReadTimeout, rafthttp.ConnWriteTimeout)
		if err != nil {
			return nil, err
		}

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

	if !cfg.clientTLSInfo.Empty() {
		log.Printf("etcd: clientTLS: %s", cfg.clientTLSInfo)
	}
	clns := make([]net.Listener, 0)
	for _, u := range cfg.lcurls {
		var l net.Listener
		l, err = transport.NewKeepAliveListener(u.Host, u.Scheme, cfg.clientTLSInfo)
		if err != nil {
			return nil, err
		}

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

	srvcfg := &etcdserver.ServerConfig{
		Name:            cfg.name,
		ClientURLs:      cfg.acurls,
		PeerURLs:        cfg.apurls,
		DataDir:         membdir,
		SnapCount:       cfg.snapCount,
		MaxSnapFiles:    cfg.maxSnapFiles,
		MaxWALFiles:     cfg.maxWalFiles,
		Cluster:         cls,
		DiscoveryURL:    cfg.durl,
		DiscoveryProxy:  cfg.dproxy,
		NewCluster:      cfg.isNewCluster(),
		ForceNewCluster: cfg.forceNewCluster,
		Transport:       pt,
		TickMs:          cfg.TickMs,
		ElectionTicks:   cfg.electionTicks(),
	}
	var s *etcdserver.EtcdServer
	s, err = etcdserver.NewServer(srvcfg)
	if err != nil {
		return nil, err
	}
	s.Start()

	if cfg.corsInfo.String() != "" {
		log.Printf("etcd: cors = %s", cfg.corsInfo)
	}
	ch := &cors.CORSHandler{
		Handler: etcdhttp.NewClientHandler(s),
		Info:    cfg.corsInfo,
	}
	ph := etcdhttp.NewPeerHandler(s.Cluster, s.RaftHandler())
	// Start the peer server in a goroutine
	for _, l := range plns {
		go func(l net.Listener) {
			log.Fatal(serveHTTP(l, ph, 5*time.Minute))
		}(l)
	}
	// Start a client server goroutine for each listen address
	for _, l := range clns {
		go func(l net.Listener) {
			// read timeout does not work with http close notify
			// TODO: https://github.com/golang/go/issues/9524
			log.Fatal(serveHTTP(l, ch, 0))
		}(l)
	}
	return s.StopNotify(), nil
}