func TestSendMessage(t *testing.T) {
// member 1
tr := &Transport{
RoundTripper: &http.Transport{},
ID: types.ID(1),
ClusterID: types.ID(1),
Raft: &fakeRaft{},
ServerStats: newServerStats(),
LeaderStats: stats.NewLeaderStats("1"),
}
tr.Start()
srv := httptest.NewServer(tr.Handler())
defer srv.Close()
// member 2
recvc := make(chan raftpb.Message, 1)
p := &fakeRaft{recvc: recvc}
tr2 := &Transport{
RoundTripper: &http.Transport{},
ID: types.ID(2),
ClusterID: types.ID(1),
Raft: p,
ServerStats: newServerStats(),
LeaderStats: stats.NewLeaderStats("2"),
}
tr2.Start()
srv2 := httptest.NewServer(tr2.Handler())
defer srv2.Close()
tr.AddPeer(types.ID(2), []string{srv2.URL})
defer tr.Stop()
tr2.AddPeer(types.ID(1), []string{srv.URL})
defer tr2.Stop()
if !waitStreamWorking(tr.Get(types.ID(2)).(*peer)) {
t.Fatalf("stream from 1 to 2 is not in work as expected")
}
data := []byte("some data")
tests := []raftpb.Message{
// these messages are set to send to itself, which facilitates testing.
{Type: raftpb.MsgProp, From: 1, To: 2, Entries: []raftpb.Entry{{Data: data}}},
// TODO: send out MsgApp which fits msgapp stream but the term doesn't match
{Type: raftpb.MsgApp, From: 1, To: 2, Term: 1, Index: 3, LogTerm: 0, Entries: []raftpb.Entry{{Index: 4, Term: 1, Data: data}}, Commit: 3},
{Type: raftpb.MsgAppResp, From: 1, To: 2, Term: 1, Index: 3},
{Type: raftpb.MsgVote, From: 1, To: 2, Term: 1, Index: 3, LogTerm: 0},
{Type: raftpb.MsgVoteResp, From: 1, To: 2, Term: 1},
{Type: raftpb.MsgSnap, From: 1, To: 2, Term: 1, Snapshot: raftpb.Snapshot{Metadata: raftpb.SnapshotMetadata{Index: 1000, Term: 1}, Data: data}},
{Type: raftpb.MsgHeartbeat, From: 1, To: 2, Term: 1, Commit: 3},
{Type: raftpb.MsgHeartbeatResp, From: 1, To: 2, Term: 1},
}
for i, tt := range tests {
tr.Send([]raftpb.Message{tt})
msg := <-recvc
if !reflect.DeepEqual(msg, tt) {
t.Errorf("#%d: msg = %+v, want %+v", i, msg, tt)
}
}
}
// TestSendMessageWhenStreamIsBroken tests that message can be sent to the
// remote in a limited time when all underlying connections are broken.
func TestSendMessageWhenStreamIsBroken(t *testing.T) {
// member 1
tr := &Transport{
RoundTripper: &http.Transport{},
ID: types.ID(1),
ClusterID: types.ID(1),
Raft: &fakeRaft{},
ServerStats: newServerStats(),
LeaderStats: stats.NewLeaderStats("1"),
}
tr.Start()
srv := httptest.NewServer(tr.Handler())
defer srv.Close()
// member 2
recvc := make(chan raftpb.Message, 1)
p := &fakeRaft{recvc: recvc}
tr2 := &Transport{
RoundTripper: &http.Transport{},
ID: types.ID(2),
ClusterID: types.ID(1),
Raft: p,
ServerStats: newServerStats(),
LeaderStats: stats.NewLeaderStats("2"),
}
tr2.Start()
srv2 := httptest.NewServer(tr2.Handler())
defer srv2.Close()
tr.AddPeer(types.ID(2), []string{srv2.URL})
defer tr.Stop()
tr2.AddPeer(types.ID(1), []string{srv.URL})
defer tr2.Stop()
if !waitStreamWorking(tr.Get(types.ID(2)).(*peer)) {
t.Fatalf("stream from 1 to 2 is not in work as expected")
}
// break the stream
srv.CloseClientConnections()
srv2.CloseClientConnections()
var n int
for {
select {
// TODO: remove this resend logic when we add retry logic into the code
case <-time.After(time.Millisecond):
n++
tr.Send([]raftpb.Message{{Type: raftpb.MsgHeartbeat, From: 1, To: 2, Term: 1, Commit: 3}})
case <-recvc:
if n > 10 {
t.Errorf("disconnection time = %dms, want < 10ms", n)
}
return
}
}
}
func TestTransportAdd(t *testing.T) {
ls := stats.NewLeaderStats("")
term := uint64(10)
tr := &transport{
roundTripper: &roundTripperRecorder{},
leaderStats: ls,
term: term,
peers: make(map[types.ID]Peer),
prober: probing.NewProber(nil),
}
tr.AddPeer(1, []string{"http://localhost:2380"})
if _, ok := ls.Followers["1"]; !ok {
t.Errorf("FollowerStats[1] is nil, want exists")
}
s, ok := tr.peers[types.ID(1)]
if !ok {
tr.Stop()
t.Fatalf("senders[1] is nil, want exists")
}
// duplicate AddPeer is ignored
tr.AddPeer(1, []string{"http://localhost:2380"})
ns := tr.peers[types.ID(1)]
if s != ns {
t.Errorf("sender = %v, want %v", ns, s)
}
tr.Stop()
if g := s.(*peer).msgAppReader.msgAppTerm; g != term {
t.Errorf("peer.term = %d, want %d", g, term)
}
}
func TestTransportAdd(t *testing.T) {
ls := stats.NewLeaderStats("")
tr := &Transport{
LeaderStats: ls,
streamRt: &roundTripperRecorder{},
peers: make(map[types.ID]Peer),
prober: probing.NewProber(nil),
}
tr.AddPeer(1, []string{"http://localhost:2380"})
if _, ok := ls.Followers["1"]; !ok {
t.Errorf("FollowerStats[1] is nil, want exists")
}
s, ok := tr.peers[types.ID(1)]
if !ok {
tr.Stop()
t.Fatalf("senders[1] is nil, want exists")
}
// duplicate AddPeer is ignored
tr.AddPeer(1, []string{"http://localhost:2380"})
ns := tr.peers[types.ID(1)]
if s != ns {
t.Errorf("sender = %v, want %v", ns, s)
}
tr.Stop()
}
func TestTransportErrorc(t *testing.T) {
errorc := make(chan error, 1)
tr := &Transport{
Raft: &fakeRaft{},
LeaderStats: stats.NewLeaderStats(""),
ErrorC: errorc,
streamRt: newRespRoundTripper(http.StatusForbidden, nil),
pipelineRt: newRespRoundTripper(http.StatusForbidden, nil),
peers: make(map[types.ID]Peer),
prober: probing.NewProber(nil),
}
tr.AddPeer(1, []string{"http://localhost:2380"})
defer tr.Stop()
select {
case <-errorc:
t.Fatalf("received unexpected from errorc")
case <-time.After(10 * time.Millisecond):
}
tr.peers[1].send(raftpb.Message{})
testutil.WaitSchedule()
select {
case <-errorc:
default:
t.Fatalf("cannot receive error from errorc")
}
}
func (rc *raftNode) startRaft() {
if !fileutil.Exist(rc.snapdir) {
if err := os.Mkdir(rc.snapdir, 0750); err != nil {
log.Fatalf("raftexample: cannot create dir for snapshot (%v)", err)
}
}
rc.snapshotter = snap.New(rc.snapdir)
rc.snapshotterReady <- rc.snapshotter
oldwal := wal.Exist(rc.waldir)
rc.wal = rc.replayWAL()
rpeers := make([]raft.Peer, len(rc.peers))
for i := range rpeers {
rpeers[i] = raft.Peer{ID: uint64(i + 1)}
}
c := &raft.Config{
ID: uint64(rc.id),
ElectionTick: 10,
HeartbeatTick: 1,
Storage: rc.raftStorage,
MaxSizePerMsg: 1024 * 1024,
MaxInflightMsgs: 256,
}
if oldwal {
rc.node = raft.RestartNode(c)
} else {
startPeers := rpeers
if rc.join {
startPeers = nil
}
rc.node = raft.StartNode(c, startPeers)
}
ss := &stats.ServerStats{}
ss.Initialize()
rc.transport = &rafthttp.Transport{
ID: types.ID(rc.id),
ClusterID: 0x1000,
Raft: rc,
ServerStats: ss,
LeaderStats: stats.NewLeaderStats(strconv.Itoa(rc.id)),
ErrorC: make(chan error),
}
rc.transport.Start()
for i := range rc.peers {
if i+1 != rc.id {
rc.transport.AddPeer(types.ID(i+1), []string{rc.peers[i]})
}
}
go rc.serveRaft()
go rc.serveChannels()
}
func TestTransportRemove(t *testing.T) {
tr := &transport{
leaderStats: stats.NewLeaderStats(""),
peers: make(map[types.ID]*peer),
}
tr.AddPeer(1, []string{"http://a"})
tr.RemovePeer(types.ID(1))
if _, ok := tr.peers[types.ID(1)]; ok {
t.Fatalf("senders[1] exists, want removed")
}
}
func TestSendHubRemove(t *testing.T) {
cl := newTestCluster(nil)
ls := stats.NewLeaderStats("")
h := newSendHub(nil, cl, nil, nil, ls)
m := newTestMember(1, []string{"http://a"}, "", nil)
h.Add(m)
h.Remove(types.ID(1))
if _, ok := h.senders[types.ID(1)]; ok {
t.Fatalf("senders[1] exists, want removed")
}
}
func TestTransportRemove(t *testing.T) {
tr := &transport{
roundTripper: &roundTripperRecorder{},
leaderStats: stats.NewLeaderStats(""),
peers: make(map[types.ID]Peer),
}
tr.AddPeer(1, []string{"http://localhost:2380"})
tr.RemovePeer(types.ID(1))
defer tr.Stop()
if _, ok := tr.peers[types.ID(1)]; ok {
t.Fatalf("senders[1] exists, want removed")
}
}
func (rc *raftNode) startRaft() {
oldwal := wal.Exist(rc.waldir)
rc.wal = rc.replayWAL()
rpeers := make([]raft.Peer, len(rc.peers))
for i := range rpeers {
rpeers[i] = raft.Peer{ID: uint64(i + 1)}
}
c := &raft.Config{
ID: uint64(rc.id),
ElectionTick: 10,
HeartbeatTick: 1,
Storage: rc.raftStorage,
MaxSizePerMsg: 1024 * 1024,
MaxInflightMsgs: 256,
}
if oldwal {
rc.node = raft.RestartNode(c)
} else {
rc.node = raft.StartNode(c, rpeers)
}
ss := &stats.ServerStats{}
ss.Initialize()
rc.transport = &rafthttp.Transport{
ID: types.ID(rc.id),
ClusterID: 0x1000,
Raft: rc,
ServerStats: ss,
LeaderStats: stats.NewLeaderStats(strconv.Itoa(rc.id)),
ErrorC: make(chan error),
}
rc.transport.Start()
for i := range rc.peers {
if i+1 != rc.id {
rc.transport.AddPeer(types.ID(i+1), []string{rc.peers[i]})
}
}
go rc.serveRaft()
go rc.serveChannels()
}
func TestSendHubInitSenders(t *testing.T) {
membs := []*Member{
newTestMember(1, []string{"http://a"}, "", nil),
newTestMember(2, []string{"http://b"}, "", nil),
newTestMember(3, []string{"http://c"}, "", nil),
}
cl := newTestCluster(membs)
ls := stats.NewLeaderStats("")
h := newSendHub(nil, cl, nil, nil, ls)
ids := cl.MemberIDs()
if len(h.senders) != len(ids) {
t.Errorf("len(ids) = %d, want %d", len(h.senders), len(ids))
}
for _, id := range ids {
if _, ok := h.senders[id]; !ok {
t.Errorf("senders[%s] is nil, want exists", id)
}
}
}
func TestSendHubAdd(t *testing.T) {
cl := newTestCluster(nil)
ls := stats.NewLeaderStats("")
h := newSendHub(nil, cl, nil, nil, ls)
m := newTestMember(1, []string{"http://a"}, "", nil)
h.Add(m)
if _, ok := ls.Followers["1"]; !ok {
t.Errorf("FollowerStats[1] is nil, want exists")
}
s, ok := h.senders[types.ID(1)]
if !ok {
t.Fatalf("senders[1] is nil, want exists")
}
h.Add(m)
ns := h.senders[types.ID(1)]
if s != ns {
t.Errorf("sender = %p, want %p", ns, s)
}
}
func TestSendHubShouldStop(t *testing.T) {
tr := newRespRoundTripper(http.StatusForbidden, nil)
cl := newTestCluster(nil)
ls := stats.NewLeaderStats("")
h := newSendHub(tr, cl, nil, nil, ls)
m := newTestMember(1, []string{"http://a"}, "", nil)
h.Add(m)
shouldstop := h.ShouldStopNotify()
select {
case <-shouldstop:
t.Fatalf("received unexpected shouldstop notification")
case <-time.After(10 * time.Millisecond):
}
h.senders[1].Send(raftpb.Message{})
testutil.ForceGosched()
select {
case <-shouldstop:
default:
t.Fatalf("cannot receive stop notification")
}
}
func TestTransportAdd(t *testing.T) {
ls := stats.NewLeaderStats("")
tr := &transport{
leaderStats: ls,
peers: make(map[types.ID]*peer),
}
tr.AddPeer(1, []string{"http://a"})
if _, ok := ls.Followers["1"]; !ok {
t.Errorf("FollowerStats[1] is nil, want exists")
}
s, ok := tr.peers[types.ID(1)]
if !ok {
t.Fatalf("senders[1] is nil, want exists")
}
// duplicate AddPeer is ignored
tr.AddPeer(1, []string{"http://a"})
ns := tr.peers[types.ID(1)]
if s != ns {
t.Errorf("sender = %v, want %v", ns, s)
}
}
func TestTransportErrorc(t *testing.T) {
errorc := make(chan error, 1)
tr := &transport{
roundTripper: newRespRoundTripper(http.StatusForbidden, nil),
leaderStats: stats.NewLeaderStats(""),
peers: make(map[types.ID]*peer),
errorc: errorc,
}
tr.AddPeer(1, []string{"http://a"})
select {
case <-errorc:
t.Fatalf("received unexpected from errorc")
case <-time.After(10 * time.Millisecond):
}
tr.peers[1].Send(raftpb.Message{})
testutil.ForceGosched()
select {
case <-errorc:
default:
t.Fatalf("cannot receive error from errorc")
}
}
// 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 {
if err := os.MkdirAll(cfg.SnapDir(), privateDirMode); err != nil {
log.Fatalf("etcdserver: cannot create snapshot directory: %v", err)
}
ss := snap.New(cfg.SnapDir())
st := store.New()
var w *wal.WAL
var n raft.Node
var id uint64
haveWAL := wal.Exist(cfg.WALDir())
switch {
case !haveWAL && cfg.ClusterState == ClusterStateValueExisting:
cl, err := GetClusterFromPeers(cfg.Cluster.PeerURLs())
if err != nil {
log.Fatal(err)
}
if err := cfg.Cluster.ValidateAndAssignIDs(cl.Members()); err != nil {
log.Fatalf("etcdserver: %v", err)
}
cfg.Cluster.SetID(cl.id)
cfg.Cluster.SetStore(st)
id, n, w = startNode(cfg, nil)
case !haveWAL && cfg.ClusterState == ClusterStateValueNew:
if err := cfg.VerifyBootstrapConfig(); err != nil {
log.Fatalf("etcdserver: %v", err)
}
m := cfg.Cluster.MemberByName(cfg.Name)
if cfg.ShouldDiscover() {
d, err := discovery.New(cfg.DiscoveryURL, m.ID, cfg.Cluster.String())
if err != nil {
log.Fatalf("etcdserver: cannot init discovery %v", err)
}
s, err := d.Discover()
if err != nil {
log.Fatalf("etcdserver: %v", err)
}
if cfg.Cluster, err = NewClusterFromString(cfg.Cluster.name, s); err != nil {
log.Fatalf("etcdserver: %v", err)
}
}
cfg.Cluster.SetStore(st)
id, n, w = startNode(cfg, cfg.Cluster.MemberIDs())
case haveWAL:
if cfg.ShouldDiscover() {
log.Printf("etcdserver: warn: ignoring discovery: etcd has already been initialized and has a valid log in %q", cfg.WALDir())
}
var index uint64
snapshot, err := ss.Load()
if err != nil && err != snap.ErrNoSnapshot {
log.Fatal(err)
}
if snapshot != nil {
log.Printf("etcdserver: recovering from snapshot at index %d", snapshot.Index)
st.Recovery(snapshot.Data)
index = snapshot.Index
}
cfg.Cluster = NewClusterFromStore(cfg.Cluster.name, st)
id, n, w = restartNode(cfg, index, snapshot)
default:
log.Fatalf("etcdserver: unsupported bootstrap config")
}
sstats := &stats.ServerStats{
Name: cfg.Name,
ID: strutil.IDAsHex(id),
}
lstats := stats.NewLeaderStats(strutil.IDAsHex(id))
s := &EtcdServer{
store: st,
node: n,
id: id,
attributes: Attributes{Name: cfg.Name, ClientURLs: cfg.ClientURLs.StringSlice()},
Cluster: cfg.Cluster,
storage: struct {
*wal.WAL
*snap.Snapshotter
}{w, ss},
stats: sstats,
lstats: lstats,
send: Sender(cfg.Transport, cfg.Cluster, sstats, lstats),
Ticker: time.Tick(100 * time.Millisecond),
SyncTicker: time.Tick(500 * time.Millisecond),
snapCount: cfg.SnapCount,
}
return s
}
// 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
}
// 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
}
// 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()
var w *wal.WAL
var n raft.Node
var s *raft.MemoryStorage
var id types.ID
walVersion, err := wal.DetectVersion(cfg.DataDir)
if err != nil {
return nil, err
}
if walVersion == wal.WALUnknown {
return nil, fmt.Errorf("unknown wal version in data dir %s", cfg.DataDir)
}
haveWAL := walVersion != wal.WALNotExist
if haveWAL && walVersion != wal.WALv0_5 {
err := UpgradeWAL(cfg, walVersion)
if err != nil {
return nil, err
}
}
ss := snap.New(cfg.SnapDir())
switch {
case !haveWAL && !cfg.NewCluster:
us := getOtherPeerURLs(cfg.Cluster, cfg.Name)
existingCluster, err := GetClusterFromPeers(us)
if err != nil {
return nil, fmt.Errorf("cannot fetch cluster info from peer urls: %v", err)
}
if err := ValidateClusterAndAssignIDs(cfg.Cluster, existingCluster); err != nil {
return nil, fmt.Errorf("error validating peerURLs %s: %v", existingCluster, err)
}
cfg.Cluster.SetID(existingCluster.id)
cfg.Cluster.SetStore(st)
cfg.Print()
id, n, s, w = startNode(cfg, nil)
case !haveWAL && cfg.NewCluster:
if err := cfg.VerifyBootstrapConfig(); err != nil {
return nil, err
}
if err := checkClientURLsEmptyFromPeers(cfg.Cluster, cfg.Name); err != nil {
return nil, err
}
m := cfg.Cluster.MemberByName(cfg.Name)
if cfg.ShouldDiscover() {
s, err := discovery.JoinCluster(cfg.DiscoveryURL, cfg.DiscoveryProxy, m.ID, cfg.Cluster.String())
if err != nil {
return nil, err
}
if cfg.Cluster, err = NewClusterFromString(cfg.Cluster.token, s); err != nil {
return nil, err
}
}
cfg.Cluster.SetStore(st)
cfg.PrintWithInitial()
id, n, s, w = startNode(cfg, cfg.Cluster.MemberIDs())
case haveWAL:
if cfg.ShouldDiscover() {
log.Printf("etcdserver: discovery token ignored since a cluster has already been initialized. Valid log found at %q", cfg.WALDir())
}
var index uint64
snapshot, err := ss.Load()
if err != nil && err != snap.ErrNoSnapshot {
return nil, err
}
if snapshot != nil {
if err := st.Recovery(snapshot.Data); err != nil {
log.Panicf("etcdserver: recovered store from snapshot error: %v", err)
}
log.Printf("etcdserver: recovered store from snapshot at index %d", snapshot.Metadata.Index)
index = snapshot.Metadata.Index
}
cfg.Cluster = NewClusterFromStore(cfg.Cluster.token, st)
cfg.Print()
if snapshot != nil {
log.Printf("etcdserver: loaded cluster information from store: %s", cfg.Cluster)
}
if !cfg.ForceNewCluster {
id, n, s, w = restartNode(cfg, index+1, snapshot)
} else {
id, n, s, w = restartAsStandaloneNode(cfg, index+1, snapshot)
}
default:
return nil, fmt.Errorf("unsupported bootstrap config")
}
sstats := &stats.ServerStats{
Name: cfg.Name,
ID: id.String(),
}
lstats := stats.NewLeaderStats(id.String())
srv := &EtcdServer{
cfg: cfg,
store: st,
node: n,
raftStorage: s,
id: id,
attributes: Attributes{Name: cfg.Name, ClientURLs: cfg.ClientURLs.StringSlice()},
Cluster: cfg.Cluster,
storage: NewStorage(w, ss),
stats: sstats,
lstats: lstats,
Ticker: time.Tick(100 * time.Millisecond),
SyncTicker: time.Tick(500 * time.Millisecond),
snapCount: cfg.SnapCount,
}
srv.sendhub = newSendHub(cfg.Transport, cfg.Cluster, srv, sstats, lstats)
for _, m := range getOtherMembers(cfg.Cluster, cfg.Name) {
srv.sendhub.Add(m)
}
return srv, nil
}
func BenchmarkSendingMsgApp(b *testing.B) {
// member 1
tr := &Transport{
RoundTripper: &http.Transport{},
ID: types.ID(1),
ClusterID: types.ID(1),
Raft: &fakeRaft{},
ServerStats: newServerStats(),
LeaderStats: stats.NewLeaderStats("1"),
}
tr.Start()
srv := httptest.NewServer(tr.Handler())
defer srv.Close()
// member 2
r := &countRaft{}
tr2 := &Transport{
RoundTripper: &http.Transport{},
ID: types.ID(2),
ClusterID: types.ID(1),
Raft: r,
ServerStats: newServerStats(),
LeaderStats: stats.NewLeaderStats("2"),
}
tr2.Start()
srv2 := httptest.NewServer(tr2.Handler())
defer srv2.Close()
tr.AddPeer(types.ID(2), []string{srv2.URL})
defer tr.Stop()
tr2.AddPeer(types.ID(1), []string{srv.URL})
defer tr2.Stop()
if !waitStreamWorking(tr.Get(types.ID(2)).(*peer)) {
b.Fatalf("stream from 1 to 2 is not in work as expected")
}
b.ReportAllocs()
b.SetBytes(64)
b.ResetTimer()
data := make([]byte, 64)
for i := 0; i < b.N; i++ {
tr.Send([]raftpb.Message{
{
Type: raftpb.MsgApp,
From: 1,
To: 2,
Index: uint64(i),
Entries: []raftpb.Entry{
{
Index: uint64(i + 1),
Data: data,
},
},
},
})
}
// wait until all messages are received by the target raft
for r.count() != b.N {
time.Sleep(time.Millisecond)
}
b.StopTimer()
}
// 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
}
// 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(StoreAdminPrefix, StoreKeysPrefix)
var w *wal.WAL
var n raft.Node
var s *raft.MemoryStorage
var id types.ID
walVersion, err := wal.DetectVersion(cfg.DataDir)
if err != nil {
return nil, err
}
if walVersion == wal.WALUnknown {
return nil, fmt.Errorf("unknown wal version in data dir %s", cfg.DataDir)
}
haveWAL := walVersion != wal.WALNotExist
ss := snap.New(cfg.SnapDir())
switch {
case !haveWAL && !cfg.NewCluster:
us := getOtherPeerURLs(cfg.Cluster, cfg.Name)
existingCluster, err := GetClusterFromPeers(us, cfg.Transport)
if err != nil {
return nil, fmt.Errorf("cannot fetch cluster info from peer urls: %v", err)
}
if err := ValidateClusterAndAssignIDs(cfg.Cluster, existingCluster); err != nil {
return nil, fmt.Errorf("error validating peerURLs %s: %v", existingCluster, err)
}
cfg.Cluster.SetID(existingCluster.id)
cfg.Cluster.SetStore(st)
cfg.Print()
id, n, s, w = startNode(cfg, nil)
case !haveWAL && cfg.NewCluster:
if err := cfg.VerifyBootstrapConfig(); err != nil {
return nil, err
}
m := cfg.Cluster.MemberByName(cfg.Name)
if isBootstrapped(cfg) {
return nil, fmt.Errorf("member %s has already been bootstrapped", m.ID)
}
if cfg.ShouldDiscover() {
s, err := discovery.JoinCluster(cfg.DiscoveryURL, cfg.DiscoveryProxy, m.ID, cfg.Cluster.String())
if err != nil {
return nil, err
}
if cfg.Cluster, err = NewClusterFromString(cfg.Cluster.token, s); err != nil {
return nil, err
}
}
cfg.Cluster.SetStore(st)
cfg.PrintWithInitial()
id, n, s, w = startNode(cfg, cfg.Cluster.MemberIDs())
case haveWAL:
if walVersion != wal.WALv0_5 {
if err := upgradeWAL(cfg, walVersion); err != nil {
return nil, err
}
}
if cfg.ShouldDiscover() {
log.Printf("etcdserver: 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 {
log.Panicf("etcdserver: recovered store from snapshot error: %v", err)
}
log.Printf("etcdserver: recovered store from snapshot at index %d", snapshot.Metadata.Index)
}
cfg.Cluster = NewClusterFromStore(cfg.Cluster.token, st)
cfg.Print()
if snapshot != nil {
log.Printf("etcdserver: loaded cluster information from store: %s", cfg.Cluster)
}
if !cfg.ForceNewCluster {
id, n, s, w = restartNode(cfg, snapshot)
} else {
id, n, s, w = restartAsStandaloneNode(cfg, snapshot)
}
default:
return nil, fmt.Errorf("unsupported bootstrap config")
}
sstats := &stats.ServerStats{
Name: cfg.Name,
ID: id.String(),
}
lstats := stats.NewLeaderStats(id.String())
srv := &EtcdServer{
cfg: cfg,
errorc: make(chan error, 1),
store: st,
r: raftNode{
Node: n,
snapCount: cfg.SnapCount,
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: cfg.Cluster,
stats: sstats,
lstats: lstats,
SyncTicker: time.Tick(500 * time.Millisecond),
reqIDGen: idutil.NewGenerator(uint8(id), time.Now()),
}
tr := rafthttp.NewTransporter(cfg.Transport, id, cfg.Cluster.ID(), srv, srv.errorc, sstats, lstats)
// add all the remote members into sendhub
for _, m := range cfg.Cluster.Members() {
if m.ID != id {
tr.AddPeer(m.ID, m.PeerURLs)
}
}
srv.r.transport = tr
return srv, nil
}