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)
}
}
}
// 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()
}
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))
}
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())
}
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))
}
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())
}
// 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)
}
// 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)
}
// 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()
}