khenaidoo | ffe076b | 2019-01-15 16:08:08 -0500 | [diff] [blame^] | 1 | // Copyright 2016 The etcd Authors |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package embed |
| 16 | |
| 17 | import ( |
| 18 | "context" |
| 19 | "crypto/tls" |
| 20 | "fmt" |
| 21 | "io/ioutil" |
| 22 | defaultLog "log" |
| 23 | "net" |
| 24 | "net/http" |
| 25 | "net/url" |
| 26 | "strconv" |
| 27 | "sync" |
| 28 | "time" |
| 29 | |
| 30 | "github.com/coreos/etcd/compactor" |
| 31 | "github.com/coreos/etcd/etcdserver" |
| 32 | "github.com/coreos/etcd/etcdserver/api/etcdhttp" |
| 33 | "github.com/coreos/etcd/etcdserver/api/v2http" |
| 34 | "github.com/coreos/etcd/etcdserver/api/v2v3" |
| 35 | "github.com/coreos/etcd/etcdserver/api/v3client" |
| 36 | "github.com/coreos/etcd/etcdserver/api/v3rpc" |
| 37 | "github.com/coreos/etcd/pkg/cors" |
| 38 | "github.com/coreos/etcd/pkg/debugutil" |
| 39 | runtimeutil "github.com/coreos/etcd/pkg/runtime" |
| 40 | "github.com/coreos/etcd/pkg/transport" |
| 41 | "github.com/coreos/etcd/pkg/types" |
| 42 | "github.com/coreos/etcd/rafthttp" |
| 43 | |
| 44 | "github.com/coreos/pkg/capnslog" |
| 45 | grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus" |
| 46 | "github.com/soheilhy/cmux" |
| 47 | "google.golang.org/grpc" |
| 48 | "google.golang.org/grpc/keepalive" |
| 49 | ) |
| 50 | |
| 51 | var plog = capnslog.NewPackageLogger("github.com/coreos/etcd", "embed") |
| 52 | |
| 53 | const ( |
| 54 | // internal fd usage includes disk usage and transport usage. |
| 55 | // To read/write snapshot, snap pkg needs 1. In normal case, wal pkg needs |
| 56 | // at most 2 to read/lock/write WALs. One case that it needs to 2 is to |
| 57 | // read all logs after some snapshot index, which locates at the end of |
| 58 | // the second last and the head of the last. For purging, it needs to read |
| 59 | // directory, so it needs 1. For fd monitor, it needs 1. |
| 60 | // For transport, rafthttp builds two long-polling connections and at most |
| 61 | // four temporary connections with each member. There are at most 9 members |
| 62 | // in a cluster, so it should reserve 96. |
| 63 | // For the safety, we set the total reserved number to 150. |
| 64 | reservedInternalFDNum = 150 |
| 65 | ) |
| 66 | |
| 67 | // Etcd contains a running etcd server and its listeners. |
| 68 | type Etcd struct { |
| 69 | Peers []*peerListener |
| 70 | Clients []net.Listener |
| 71 | // a map of contexts for the servers that serves client requests. |
| 72 | sctxs map[string]*serveCtx |
| 73 | metricsListeners []net.Listener |
| 74 | |
| 75 | Server *etcdserver.EtcdServer |
| 76 | |
| 77 | cfg Config |
| 78 | stopc chan struct{} |
| 79 | errc chan error |
| 80 | |
| 81 | closeOnce sync.Once |
| 82 | } |
| 83 | |
| 84 | type peerListener struct { |
| 85 | net.Listener |
| 86 | serve func() error |
| 87 | close func(context.Context) error |
| 88 | } |
| 89 | |
| 90 | // StartEtcd launches the etcd server and HTTP handlers for client/server communication. |
| 91 | // The returned Etcd.Server is not guaranteed to have joined the cluster. Wait |
| 92 | // on the Etcd.Server.ReadyNotify() channel to know when it completes and is ready for use. |
| 93 | func StartEtcd(inCfg *Config) (e *Etcd, err error) { |
| 94 | if err = inCfg.Validate(); err != nil { |
| 95 | return nil, err |
| 96 | } |
| 97 | serving := false |
| 98 | e = &Etcd{cfg: *inCfg, stopc: make(chan struct{})} |
| 99 | cfg := &e.cfg |
| 100 | defer func() { |
| 101 | if e == nil || err == nil { |
| 102 | return |
| 103 | } |
| 104 | if !serving { |
| 105 | // errored before starting gRPC server for serveCtx.serversC |
| 106 | for _, sctx := range e.sctxs { |
| 107 | close(sctx.serversC) |
| 108 | } |
| 109 | } |
| 110 | e.Close() |
| 111 | e = nil |
| 112 | }() |
| 113 | |
| 114 | if e.Peers, err = startPeerListeners(cfg); err != nil { |
| 115 | return e, err |
| 116 | } |
| 117 | if e.sctxs, err = startClientListeners(cfg); err != nil { |
| 118 | return e, err |
| 119 | } |
| 120 | for _, sctx := range e.sctxs { |
| 121 | e.Clients = append(e.Clients, sctx.l) |
| 122 | } |
| 123 | |
| 124 | var ( |
| 125 | urlsmap types.URLsMap |
| 126 | token string |
| 127 | ) |
| 128 | |
| 129 | memberInitialized := true |
| 130 | if !isMemberInitialized(cfg) { |
| 131 | memberInitialized = false |
| 132 | urlsmap, token, err = cfg.PeerURLsMapAndToken("etcd") |
| 133 | if err != nil { |
| 134 | return e, fmt.Errorf("error setting up initial cluster: %v", err) |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | // AutoCompactionRetention defaults to "0" if not set. |
| 139 | if len(cfg.AutoCompactionRetention) == 0 { |
| 140 | cfg.AutoCompactionRetention = "0" |
| 141 | } |
| 142 | autoCompactionRetention, err := parseCompactionRetention(cfg.AutoCompactionMode, cfg.AutoCompactionRetention) |
| 143 | if err != nil { |
| 144 | return e, err |
| 145 | } |
| 146 | |
| 147 | srvcfg := etcdserver.ServerConfig{ |
| 148 | Name: cfg.Name, |
| 149 | ClientURLs: cfg.ACUrls, |
| 150 | PeerURLs: cfg.APUrls, |
| 151 | DataDir: cfg.Dir, |
| 152 | DedicatedWALDir: cfg.WalDir, |
| 153 | SnapCount: cfg.SnapCount, |
| 154 | MaxSnapFiles: cfg.MaxSnapFiles, |
| 155 | MaxWALFiles: cfg.MaxWalFiles, |
| 156 | InitialPeerURLsMap: urlsmap, |
| 157 | InitialClusterToken: token, |
| 158 | DiscoveryURL: cfg.Durl, |
| 159 | DiscoveryProxy: cfg.Dproxy, |
| 160 | NewCluster: cfg.IsNewCluster(), |
| 161 | ForceNewCluster: cfg.ForceNewCluster, |
| 162 | PeerTLSInfo: cfg.PeerTLSInfo, |
| 163 | TickMs: cfg.TickMs, |
| 164 | ElectionTicks: cfg.ElectionTicks(), |
| 165 | InitialElectionTickAdvance: cfg.InitialElectionTickAdvance, |
| 166 | AutoCompactionRetention: autoCompactionRetention, |
| 167 | AutoCompactionMode: cfg.AutoCompactionMode, |
| 168 | QuotaBackendBytes: cfg.QuotaBackendBytes, |
| 169 | MaxTxnOps: cfg.MaxTxnOps, |
| 170 | MaxRequestBytes: cfg.MaxRequestBytes, |
| 171 | StrictReconfigCheck: cfg.StrictReconfigCheck, |
| 172 | ClientCertAuthEnabled: cfg.ClientTLSInfo.ClientCertAuth, |
| 173 | AuthToken: cfg.AuthToken, |
| 174 | InitialCorruptCheck: cfg.ExperimentalInitialCorruptCheck, |
| 175 | CorruptCheckTime: cfg.ExperimentalCorruptCheckTime, |
| 176 | Debug: cfg.Debug, |
| 177 | } |
| 178 | |
| 179 | if e.Server, err = etcdserver.NewServer(srvcfg); err != nil { |
| 180 | return e, err |
| 181 | } |
| 182 | |
| 183 | // buffer channel so goroutines on closed connections won't wait forever |
| 184 | e.errc = make(chan error, len(e.Peers)+len(e.Clients)+2*len(e.sctxs)) |
| 185 | |
| 186 | // newly started member ("memberInitialized==false") |
| 187 | // does not need corruption check |
| 188 | if memberInitialized { |
| 189 | if err = e.Server.CheckInitialHashKV(); err != nil { |
| 190 | // set "EtcdServer" to nil, so that it does not block on "EtcdServer.Close()" |
| 191 | // (nothing to close since rafthttp transports have not been started) |
| 192 | e.Server = nil |
| 193 | return e, err |
| 194 | } |
| 195 | } |
| 196 | e.Server.Start() |
| 197 | |
| 198 | if err = e.servePeers(); err != nil { |
| 199 | return e, err |
| 200 | } |
| 201 | if err = e.serveClients(); err != nil { |
| 202 | return e, err |
| 203 | } |
| 204 | if err = e.serveMetrics(); err != nil { |
| 205 | return e, err |
| 206 | } |
| 207 | |
| 208 | serving = true |
| 209 | return e, nil |
| 210 | } |
| 211 | |
| 212 | // Config returns the current configuration. |
| 213 | func (e *Etcd) Config() Config { |
| 214 | return e.cfg |
| 215 | } |
| 216 | |
| 217 | // Close gracefully shuts down all servers/listeners. |
| 218 | // Client requests will be terminated with request timeout. |
| 219 | // After timeout, enforce remaning requests be closed immediately. |
| 220 | func (e *Etcd) Close() { |
| 221 | e.closeOnce.Do(func() { close(e.stopc) }) |
| 222 | |
| 223 | // close client requests with request timeout |
| 224 | timeout := 2 * time.Second |
| 225 | if e.Server != nil { |
| 226 | timeout = e.Server.Cfg.ReqTimeout() |
| 227 | } |
| 228 | for _, sctx := range e.sctxs { |
| 229 | for ss := range sctx.serversC { |
| 230 | ctx, cancel := context.WithTimeout(context.Background(), timeout) |
| 231 | stopServers(ctx, ss) |
| 232 | cancel() |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | for _, sctx := range e.sctxs { |
| 237 | sctx.cancel() |
| 238 | } |
| 239 | |
| 240 | for i := range e.Clients { |
| 241 | if e.Clients[i] != nil { |
| 242 | e.Clients[i].Close() |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | for i := range e.metricsListeners { |
| 247 | e.metricsListeners[i].Close() |
| 248 | } |
| 249 | |
| 250 | // close rafthttp transports |
| 251 | if e.Server != nil { |
| 252 | e.Server.Stop() |
| 253 | } |
| 254 | |
| 255 | // close all idle connections in peer handler (wait up to 1-second) |
| 256 | for i := range e.Peers { |
| 257 | if e.Peers[i] != nil && e.Peers[i].close != nil { |
| 258 | ctx, cancel := context.WithTimeout(context.Background(), time.Second) |
| 259 | e.Peers[i].close(ctx) |
| 260 | cancel() |
| 261 | } |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | func stopServers(ctx context.Context, ss *servers) { |
| 266 | shutdownNow := func() { |
| 267 | // first, close the http.Server |
| 268 | ss.http.Shutdown(ctx) |
| 269 | // then close grpc.Server; cancels all active RPCs |
| 270 | ss.grpc.Stop() |
| 271 | } |
| 272 | |
| 273 | // do not grpc.Server.GracefulStop with TLS enabled etcd server |
| 274 | // See https://github.com/grpc/grpc-go/issues/1384#issuecomment-317124531 |
| 275 | // and https://github.com/coreos/etcd/issues/8916 |
| 276 | if ss.secure { |
| 277 | shutdownNow() |
| 278 | return |
| 279 | } |
| 280 | |
| 281 | ch := make(chan struct{}) |
| 282 | go func() { |
| 283 | defer close(ch) |
| 284 | // close listeners to stop accepting new connections, |
| 285 | // will block on any existing transports |
| 286 | ss.grpc.GracefulStop() |
| 287 | }() |
| 288 | |
| 289 | // wait until all pending RPCs are finished |
| 290 | select { |
| 291 | case <-ch: |
| 292 | case <-ctx.Done(): |
| 293 | // took too long, manually close open transports |
| 294 | // e.g. watch streams |
| 295 | shutdownNow() |
| 296 | |
| 297 | // concurrent GracefulStop should be interrupted |
| 298 | <-ch |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | func (e *Etcd) Err() <-chan error { return e.errc } |
| 303 | |
| 304 | func startPeerListeners(cfg *Config) (peers []*peerListener, err error) { |
| 305 | if err = updateCipherSuites(&cfg.PeerTLSInfo, cfg.CipherSuites); err != nil { |
| 306 | return nil, err |
| 307 | } |
| 308 | if err = cfg.PeerSelfCert(); err != nil { |
| 309 | plog.Fatalf("could not get certs (%v)", err) |
| 310 | } |
| 311 | if !cfg.PeerTLSInfo.Empty() { |
| 312 | plog.Infof("peerTLS: %s", cfg.PeerTLSInfo) |
| 313 | } |
| 314 | |
| 315 | peers = make([]*peerListener, len(cfg.LPUrls)) |
| 316 | defer func() { |
| 317 | if err == nil { |
| 318 | return |
| 319 | } |
| 320 | for i := range peers { |
| 321 | if peers[i] != nil && peers[i].close != nil { |
| 322 | plog.Info("stopping listening for peers on ", cfg.LPUrls[i].String()) |
| 323 | ctx, cancel := context.WithTimeout(context.Background(), time.Second) |
| 324 | peers[i].close(ctx) |
| 325 | cancel() |
| 326 | } |
| 327 | } |
| 328 | }() |
| 329 | |
| 330 | for i, u := range cfg.LPUrls { |
| 331 | if u.Scheme == "http" { |
| 332 | if !cfg.PeerTLSInfo.Empty() { |
| 333 | plog.Warningf("The scheme of peer url %s is HTTP while peer key/cert files are presented. Ignored peer key/cert files.", u.String()) |
| 334 | } |
| 335 | if cfg.PeerTLSInfo.ClientCertAuth { |
| 336 | plog.Warningf("The scheme of peer url %s is HTTP while client cert auth (--peer-client-cert-auth) is enabled. Ignored client cert auth for this url.", u.String()) |
| 337 | } |
| 338 | } |
| 339 | peers[i] = &peerListener{close: func(context.Context) error { return nil }} |
| 340 | peers[i].Listener, err = rafthttp.NewListener(u, &cfg.PeerTLSInfo) |
| 341 | if err != nil { |
| 342 | return nil, err |
| 343 | } |
| 344 | // once serve, overwrite with 'http.Server.Shutdown' |
| 345 | peers[i].close = func(context.Context) error { |
| 346 | return peers[i].Listener.Close() |
| 347 | } |
| 348 | plog.Info("listening for peers on ", u.String()) |
| 349 | } |
| 350 | return peers, nil |
| 351 | } |
| 352 | |
| 353 | // configure peer handlers after rafthttp.Transport started |
| 354 | func (e *Etcd) servePeers() (err error) { |
| 355 | ph := etcdhttp.NewPeerHandler(e.Server) |
| 356 | var peerTLScfg *tls.Config |
| 357 | if !e.cfg.PeerTLSInfo.Empty() { |
| 358 | if peerTLScfg, err = e.cfg.PeerTLSInfo.ServerConfig(); err != nil { |
| 359 | return err |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | for _, p := range e.Peers { |
| 364 | gs := v3rpc.Server(e.Server, peerTLScfg) |
| 365 | m := cmux.New(p.Listener) |
| 366 | go gs.Serve(m.Match(cmux.HTTP2())) |
| 367 | srv := &http.Server{ |
| 368 | Handler: grpcHandlerFunc(gs, ph), |
| 369 | ReadTimeout: 5 * time.Minute, |
| 370 | ErrorLog: defaultLog.New(ioutil.Discard, "", 0), // do not log user error |
| 371 | } |
| 372 | go srv.Serve(m.Match(cmux.Any())) |
| 373 | p.serve = func() error { return m.Serve() } |
| 374 | p.close = func(ctx context.Context) error { |
| 375 | // gracefully shutdown http.Server |
| 376 | // close open listeners, idle connections |
| 377 | // until context cancel or time-out |
| 378 | stopServers(ctx, &servers{secure: peerTLScfg != nil, grpc: gs, http: srv}) |
| 379 | return nil |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | // start peer servers in a goroutine |
| 384 | for _, pl := range e.Peers { |
| 385 | go func(l *peerListener) { |
| 386 | e.errHandler(l.serve()) |
| 387 | }(pl) |
| 388 | } |
| 389 | return nil |
| 390 | } |
| 391 | |
| 392 | func startClientListeners(cfg *Config) (sctxs map[string]*serveCtx, err error) { |
| 393 | if err = updateCipherSuites(&cfg.ClientTLSInfo, cfg.CipherSuites); err != nil { |
| 394 | return nil, err |
| 395 | } |
| 396 | if err = cfg.ClientSelfCert(); err != nil { |
| 397 | plog.Fatalf("could not get certs (%v)", err) |
| 398 | } |
| 399 | if cfg.EnablePprof { |
| 400 | plog.Infof("pprof is enabled under %s", debugutil.HTTPPrefixPProf) |
| 401 | } |
| 402 | |
| 403 | sctxs = make(map[string]*serveCtx) |
| 404 | for _, u := range cfg.LCUrls { |
| 405 | sctx := newServeCtx() |
| 406 | |
| 407 | if u.Scheme == "http" || u.Scheme == "unix" { |
| 408 | if !cfg.ClientTLSInfo.Empty() { |
| 409 | plog.Warningf("The scheme of client url %s is HTTP while peer key/cert files are presented. Ignored key/cert files.", u.String()) |
| 410 | } |
| 411 | if cfg.ClientTLSInfo.ClientCertAuth { |
| 412 | plog.Warningf("The scheme of client url %s is HTTP while client cert auth (--client-cert-auth) is enabled. Ignored client cert auth for this url.", u.String()) |
| 413 | } |
| 414 | } |
| 415 | if (u.Scheme == "https" || u.Scheme == "unixs") && cfg.ClientTLSInfo.Empty() { |
| 416 | return nil, fmt.Errorf("TLS key/cert (--cert-file, --key-file) must be provided for client url %s with HTTPs scheme", u.String()) |
| 417 | } |
| 418 | |
| 419 | proto := "tcp" |
| 420 | addr := u.Host |
| 421 | if u.Scheme == "unix" || u.Scheme == "unixs" { |
| 422 | proto = "unix" |
| 423 | addr = u.Host + u.Path |
| 424 | } |
| 425 | |
| 426 | sctx.secure = u.Scheme == "https" || u.Scheme == "unixs" |
| 427 | sctx.insecure = !sctx.secure |
| 428 | if oldctx := sctxs[addr]; oldctx != nil { |
| 429 | oldctx.secure = oldctx.secure || sctx.secure |
| 430 | oldctx.insecure = oldctx.insecure || sctx.insecure |
| 431 | continue |
| 432 | } |
| 433 | |
| 434 | if sctx.l, err = net.Listen(proto, addr); err != nil { |
| 435 | return nil, err |
| 436 | } |
| 437 | // net.Listener will rewrite ipv4 0.0.0.0 to ipv6 [::], breaking |
| 438 | // hosts that disable ipv6. So, use the address given by the user. |
| 439 | sctx.addr = addr |
| 440 | |
| 441 | if fdLimit, fderr := runtimeutil.FDLimit(); fderr == nil { |
| 442 | if fdLimit <= reservedInternalFDNum { |
| 443 | plog.Fatalf("file descriptor limit[%d] of etcd process is too low, and should be set higher than %d to ensure internal usage", fdLimit, reservedInternalFDNum) |
| 444 | } |
| 445 | sctx.l = transport.LimitListener(sctx.l, int(fdLimit-reservedInternalFDNum)) |
| 446 | } |
| 447 | |
| 448 | if proto == "tcp" { |
| 449 | if sctx.l, err = transport.NewKeepAliveListener(sctx.l, "tcp", nil); err != nil { |
| 450 | return nil, err |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | plog.Info("listening for client requests on ", u.Host) |
| 455 | defer func() { |
| 456 | if err != nil { |
| 457 | sctx.l.Close() |
| 458 | plog.Info("stopping listening for client requests on ", u.Host) |
| 459 | } |
| 460 | }() |
| 461 | for k := range cfg.UserHandlers { |
| 462 | sctx.userHandlers[k] = cfg.UserHandlers[k] |
| 463 | } |
| 464 | sctx.serviceRegister = cfg.ServiceRegister |
| 465 | if cfg.EnablePprof || cfg.Debug { |
| 466 | sctx.registerPprof() |
| 467 | } |
| 468 | if cfg.Debug { |
| 469 | sctx.registerTrace() |
| 470 | } |
| 471 | sctxs[addr] = sctx |
| 472 | } |
| 473 | return sctxs, nil |
| 474 | } |
| 475 | |
| 476 | func (e *Etcd) serveClients() (err error) { |
| 477 | if !e.cfg.ClientTLSInfo.Empty() { |
| 478 | plog.Infof("ClientTLS: %s", e.cfg.ClientTLSInfo) |
| 479 | } |
| 480 | |
| 481 | if e.cfg.CorsInfo.String() != "" { |
| 482 | plog.Infof("cors = %s", e.cfg.CorsInfo) |
| 483 | } |
| 484 | |
| 485 | // Start a client server goroutine for each listen address |
| 486 | var h http.Handler |
| 487 | if e.Config().EnableV2 { |
| 488 | if len(e.Config().ExperimentalEnableV2V3) > 0 { |
| 489 | srv := v2v3.NewServer(v3client.New(e.Server), e.cfg.ExperimentalEnableV2V3) |
| 490 | h = v2http.NewClientHandler(srv, e.Server.Cfg.ReqTimeout()) |
| 491 | } else { |
| 492 | h = v2http.NewClientHandler(e.Server, e.Server.Cfg.ReqTimeout()) |
| 493 | } |
| 494 | } else { |
| 495 | mux := http.NewServeMux() |
| 496 | etcdhttp.HandleBasic(mux, e.Server) |
| 497 | h = mux |
| 498 | } |
| 499 | h = http.Handler(&cors.CORSHandler{Handler: h, Info: e.cfg.CorsInfo}) |
| 500 | |
| 501 | gopts := []grpc.ServerOption{} |
| 502 | if e.cfg.GRPCKeepAliveMinTime > time.Duration(0) { |
| 503 | gopts = append(gopts, grpc.KeepaliveEnforcementPolicy(keepalive.EnforcementPolicy{ |
| 504 | MinTime: e.cfg.GRPCKeepAliveMinTime, |
| 505 | PermitWithoutStream: false, |
| 506 | })) |
| 507 | } |
| 508 | if e.cfg.GRPCKeepAliveInterval > time.Duration(0) && |
| 509 | e.cfg.GRPCKeepAliveTimeout > time.Duration(0) { |
| 510 | gopts = append(gopts, grpc.KeepaliveParams(keepalive.ServerParameters{ |
| 511 | Time: e.cfg.GRPCKeepAliveInterval, |
| 512 | Timeout: e.cfg.GRPCKeepAliveTimeout, |
| 513 | })) |
| 514 | } |
| 515 | |
| 516 | // start client servers in a goroutine |
| 517 | for _, sctx := range e.sctxs { |
| 518 | go func(s *serveCtx) { |
| 519 | e.errHandler(s.serve(e.Server, &e.cfg.ClientTLSInfo, h, e.errHandler, gopts...)) |
| 520 | }(sctx) |
| 521 | } |
| 522 | return nil |
| 523 | } |
| 524 | |
| 525 | func (e *Etcd) serveMetrics() (err error) { |
| 526 | if e.cfg.Metrics == "extensive" { |
| 527 | grpc_prometheus.EnableHandlingTimeHistogram() |
| 528 | } |
| 529 | |
| 530 | if len(e.cfg.ListenMetricsUrls) > 0 { |
| 531 | metricsMux := http.NewServeMux() |
| 532 | etcdhttp.HandleMetricsHealth(metricsMux, e.Server) |
| 533 | |
| 534 | for _, murl := range e.cfg.ListenMetricsUrls { |
| 535 | tlsInfo := &e.cfg.ClientTLSInfo |
| 536 | if murl.Scheme == "http" { |
| 537 | tlsInfo = nil |
| 538 | } |
| 539 | ml, err := transport.NewListener(murl.Host, murl.Scheme, tlsInfo) |
| 540 | if err != nil { |
| 541 | return err |
| 542 | } |
| 543 | e.metricsListeners = append(e.metricsListeners, ml) |
| 544 | go func(u url.URL, ln net.Listener) { |
| 545 | plog.Info("listening for metrics on ", u.String()) |
| 546 | e.errHandler(http.Serve(ln, metricsMux)) |
| 547 | }(murl, ml) |
| 548 | } |
| 549 | } |
| 550 | return nil |
| 551 | } |
| 552 | |
| 553 | func (e *Etcd) errHandler(err error) { |
| 554 | select { |
| 555 | case <-e.stopc: |
| 556 | return |
| 557 | default: |
| 558 | } |
| 559 | select { |
| 560 | case <-e.stopc: |
| 561 | case e.errc <- err: |
| 562 | } |
| 563 | } |
| 564 | |
| 565 | func parseCompactionRetention(mode, retention string) (ret time.Duration, err error) { |
| 566 | h, err := strconv.Atoi(retention) |
| 567 | if err == nil { |
| 568 | switch mode { |
| 569 | case compactor.ModeRevision: |
| 570 | ret = time.Duration(int64(h)) |
| 571 | case compactor.ModePeriodic: |
| 572 | ret = time.Duration(int64(h)) * time.Hour |
| 573 | } |
| 574 | } else { |
| 575 | // periodic compaction |
| 576 | ret, err = time.ParseDuration(retention) |
| 577 | if err != nil { |
| 578 | return 0, fmt.Errorf("error parsing CompactionRetention: %v", err) |
| 579 | } |
| 580 | } |
| 581 | return ret, nil |
| 582 | } |