Golang memberlist.DefaultWANConfig函數代碼示例

// AddFileHandler adds the file path to the database. It should be usually be given to an POST endpoint
// with id as the parameter
// Ex: /file/:id
func AddFileHandler(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
	decoder := json.NewDecoder(r.Body)
	// TODO: ps is there for checking emptiness. Should be replaced
	var js, ps jsonStruct
	if err := decoder.Decode(&js); err != nil || js == ps {
		w.WriteHeader(400)
		return
	}

	couchServer, err := couchdb.NewClient("http://127.0.0.1:5984", nil)
	db, _ := couchServer.CreateDB("files")
	userID := memberlist.DefaultWANConfig().Name

	_, err = db.Put(p.ByName("id"), file{UUID: uuid.NewV4().String(), Fname: path.Base(js.Path), UserID: userID}, "")
	if err != nil {
		w.WriteHeader(500)
		fmt.Fprint(w, err)
		return
	}

	// TODO: Send 409 for conflict
	if err := AddFile(p.ByName("id"), js.Path); err != nil {
		w.WriteHeader(500)
		fmt.Fprint(w, err)
		return
	}

	w.WriteHeader(201)
}

// DefaultConfig is used to return a sane default configuration
func DefaultConfig() *Config {
	hostname, err := os.Hostname()
	if err != nil {
		panic(err)
	}

	conf := &Config{
		Datacenter:              DefaultDC,
		NodeName:                hostname,
		RPCAddr:                 DefaultRPCAddr,
		RaftConfig:              raft.DefaultConfig(),
		SerfLANConfig:           serf.DefaultConfig(),
		SerfWANConfig:           serf.DefaultConfig(),
		ReconcileInterval:       60 * time.Second,
		ProtocolVersion:         ProtocolVersion2Compatible,
		ACLTTL:                  30 * time.Second,
		ACLDefaultPolicy:        "allow",
		ACLDownPolicy:           "extend-cache",
		TombstoneTTL:            15 * time.Minute,
		TombstoneTTLGranularity: 30 * time.Second,
		SessionTTLMin:           10 * time.Second,
		DisableCoordinates:      false,

		// These are tuned to provide a total throughput of 128 updates
		// per second. If you update these, you should update the client-
		// side SyncCoordinateRateTarget parameter accordingly.
		CoordinateUpdatePeriod:     5 * time.Second,
		CoordinateUpdateBatchSize:  128,
		CoordinateUpdateMaxBatches: 5,
	}

	// Increase our reap interval to 3 days instead of 24h.
	conf.SerfLANConfig.ReconnectTimeout = 3 * 24 * time.Hour
	conf.SerfWANConfig.ReconnectTimeout = 3 * 24 * time.Hour

	// WAN Serf should use the WAN timing, since we are using it
	// to communicate between DC's
	conf.SerfWANConfig.MemberlistConfig = memberlist.DefaultWANConfig()

	// Turn LAN Serf to run globally
	conf.SerfLANConfig.MemberlistConfig = memberlist.DefaultWANConfig()

	// Ensure we don't have port conflicts
	conf.SerfLANConfig.MemberlistConfig.BindPort = DefaultLANSerfPort
	conf.SerfWANConfig.MemberlistConfig.BindPort = DefaultWANSerfPort

	// Disable shutdown on removal
	conf.RaftConfig.ShutdownOnRemove = false

	// Make Raft more WAN friendly
	conf.RaftConfig.HeartbeatTimeout = 5000 * time.Millisecond
	conf.RaftConfig.ElectionTimeout = 5000 * time.Millisecond
	conf.RaftConfig.CommitTimeout = 100 * time.Millisecond
	conf.RaftConfig.LeaderLeaseTimeout = 2500 * time.Millisecond

	return conf
}

// DefaultConfig is used to return a sane default configuration
func DefaultConfig() *Config {
	hostname, err := os.Hostname()
	if err != nil {
		panic(err)
	}

	conf := &Config{
		Datacenter:        DefaultDC,
		NodeName:          hostname,
		RPCAddr:           DefaultRPCAddr,
		RaftConfig:        raft.DefaultConfig(),
		SerfLANConfig:     serf.DefaultConfig(),
		SerfWANConfig:     serf.DefaultConfig(),
		ReconcileInterval: 60 * time.Second,
		ProtocolVersion:   ProtocolVersionMax,
	}

	// Increase our reap interval to 3 days instead of 24h.
	conf.SerfLANConfig.ReconnectTimeout = 3 * 24 * time.Hour
	conf.SerfWANConfig.ReconnectTimeout = 3 * 24 * time.Hour

	// WAN Serf should use the WAN timing, since we are using it
	// to communicate between DC's
	conf.SerfWANConfig.MemberlistConfig = memberlist.DefaultWANConfig()

	// Ensure we don't have port conflicts
	conf.SerfLANConfig.MemberlistConfig.BindPort = DefaultLANSerfPort
	conf.SerfWANConfig.MemberlistConfig.BindPort = DefaultWANSerfPort

	// Disable shutdown on removal
	conf.RaftConfig.ShutdownOnRemove = false

	return conf
}

// setupAgent is used to create the agent we use
func (c *Command) setupAgent(config *Config, logOutput io.Writer) *Agent {
	bindIP, bindPort, err := config.AddrParts(config.BindAddr)
	if err != nil {
		c.Ui.Error(fmt.Sprintf("Invalid bind address: %s", err))
		return nil
	}

	var advertiseIP string
	var advertisePort int
	if config.AdvertiseAddr != "" {
		advertiseIP, advertisePort, err = config.AddrParts(config.AdvertiseAddr)
		if err != nil {
			c.Ui.Error(fmt.Sprintf("Invalid advertise address: %s", err))
			return nil
		}
	}

	encryptKey, err := config.EncryptBytes()
	if err != nil {
		c.Ui.Error(fmt.Sprintf("Invalid encryption key: %s", err))
		return nil
	}

	serfConfig := serf.DefaultConfig()
	switch config.Profile {
	case "lan":
		serfConfig.MemberlistConfig = memberlist.DefaultLANConfig()
	case "wan":
		serfConfig.MemberlistConfig = memberlist.DefaultWANConfig()
	case "local":
		serfConfig.MemberlistConfig = memberlist.DefaultLocalConfig()
	default:
		c.Ui.Error(fmt.Sprintf("Unknown profile: %s", config.Profile))
		return nil
	}

	serfConfig.MemberlistConfig.BindAddr = bindIP
	serfConfig.MemberlistConfig.BindPort = bindPort
	serfConfig.MemberlistConfig.AdvertiseAddr = advertiseIP
	serfConfig.MemberlistConfig.AdvertisePort = advertisePort
	serfConfig.MemberlistConfig.SecretKey = encryptKey
	serfConfig.NodeName = config.NodeName
	serfConfig.Tags = config.Tags
	serfConfig.SnapshotPath = config.SnapshotPath
	serfConfig.ProtocolVersion = uint8(config.Protocol)
	serfConfig.CoalescePeriod = 3 * time.Second
	serfConfig.QuiescentPeriod = time.Second
	serfConfig.UserCoalescePeriod = 3 * time.Second
	serfConfig.UserQuiescentPeriod = time.Second

	// Start Serf
	c.Ui.Output("Starting Serf agent...")
	agent, err := Create(serfConfig, logOutput)
	if err != nil {
		c.Ui.Error(fmt.Sprintf("Failed to start the Serf agent: %v", err))
		return nil
	}
	return agent
}

// DefaultConfig returns the default configuration
func DefaultConfig() *Config {
	hostname, err := os.Hostname()
	if err != nil {
		panic(err)
	}

	c := &Config{
		Region:                 DefaultRegion,
		Datacenter:             DefaultDC,
		NodeName:               hostname,
		ProtocolVersion:        ProtocolVersionMax,
		RaftConfig:             raft.DefaultConfig(),
		RaftTimeout:            10 * time.Second,
		LogOutput:              os.Stderr,
		RPCAddr:                DefaultRPCAddr,
		SerfConfig:             serf.DefaultConfig(),
		NumSchedulers:          1,
		ReconcileInterval:      60 * time.Second,
		EvalGCInterval:         5 * time.Minute,
		EvalGCThreshold:        1 * time.Hour,
		JobGCInterval:          5 * time.Minute,
		JobGCThreshold:         4 * time.Hour,
		NodeGCInterval:         5 * time.Minute,
		NodeGCThreshold:        24 * time.Hour,
		EvalNackTimeout:        60 * time.Second,
		EvalDeliveryLimit:      3,
		MinHeartbeatTTL:        10 * time.Second,
		MaxHeartbeatsPerSecond: 50.0,
		HeartbeatGrace:         10 * time.Second,
		FailoverHeartbeatTTL:   300 * time.Second,
		ConsulConfig:           config.DefaultConsulConfig(),
		VaultConfig:            config.DefaultVaultConfig(),
		RPCHoldTimeout:         5 * time.Second,
		TLSConfig:              &config.TLSConfig{},
	}

	// Enable all known schedulers by default
	c.EnabledSchedulers = make([]string, 0, len(scheduler.BuiltinSchedulers))
	for name := range scheduler.BuiltinSchedulers {
		c.EnabledSchedulers = append(c.EnabledSchedulers, name)
	}
	c.EnabledSchedulers = append(c.EnabledSchedulers, structs.JobTypeCore)

	// Default the number of schedulers to match the coores
	c.NumSchedulers = runtime.NumCPU()

	// Increase our reap interval to 3 days instead of 24h.
	c.SerfConfig.ReconnectTimeout = 3 * 24 * time.Hour

	// Serf should use the WAN timing, since we are using it
	// to communicate between DC's
	c.SerfConfig.MemberlistConfig = memberlist.DefaultWANConfig()
	c.SerfConfig.MemberlistConfig.BindPort = DefaultSerfPort

	// Disable shutdown on removal
	c.RaftConfig.ShutdownOnRemove = false
	return c
}

// DefaultConfig is used to return a sane default configuration
func DefaultConfig() *Config {
	hostname, err := os.Hostname()
	if err != nil {
		panic(err)
	}

	conf := &Config{
		Datacenter:               DefaultDC,
		NodeName:                 hostname,
		RPCAddr:                  DefaultRPCAddr,
		RaftConfig:               raft.DefaultConfig(),
		SerfLANConfig:            serf.DefaultConfig(),
		SerfWANConfig:            serf.DefaultConfig(),
		ReconcileInterval:        60 * time.Second,
		ProtocolVersion:          ProtocolVersion2Compatible,
		ACLTTL:                   30 * time.Second,
		ACLDefaultPolicy:         "allow",
		ACLDownPolicy:            "extend-cache",
		ACLReplicationInterval:   30 * time.Second,
		ACLReplicationApplyLimit: 100, // ops / sec
		TombstoneTTL:             15 * time.Minute,
		TombstoneTTLGranularity:  30 * time.Second,
		SessionTTLMin:            10 * time.Second,
		DisableCoordinates:       false,

		// These are tuned to provide a total throughput of 128 updates
		// per second. If you update these, you should update the client-
		// side SyncCoordinateRateTarget parameter accordingly.
		CoordinateUpdatePeriod:     5 * time.Second,
		CoordinateUpdateBatchSize:  128,
		CoordinateUpdateMaxBatches: 5,

		// Hold an RPC for up to 5 seconds by default
		RPCHoldTimeout: 5 * time.Second,
	}

	// Increase our reap interval to 3 days instead of 24h.
	conf.SerfLANConfig.ReconnectTimeout = 3 * 24 * time.Hour
	conf.SerfWANConfig.ReconnectTimeout = 3 * 24 * time.Hour

	// WAN Serf should use the WAN timing, since we are using it
	// to communicate between DC's
	conf.SerfWANConfig.MemberlistConfig = memberlist.DefaultWANConfig()

	// Ensure we don't have port conflicts
	conf.SerfLANConfig.MemberlistConfig.BindPort = DefaultLANSerfPort
	conf.SerfWANConfig.MemberlistConfig.BindPort = DefaultWANSerfPort

	// Enable interoperability with unversioned Raft library, and don't
	// start using new ID-based features yet.
	conf.RaftConfig.ProtocolVersion = 1

	// Disable shutdown on removal
	conf.RaftConfig.ShutdownOnRemove = false

	return conf
}

// setupAgent is used to create the agent we use
func (c *Command) setupAgent(config *Config, logOutput io.Writer) *Agent {
	bindIP, bindPort, err := config.AddrParts(config.BindAddr)
	if err != nil {
		c.Ui.Error(fmt.Sprintf("Invalid bind address: %s", err))
		return nil
	}

	// Check if we have an interface
	if iface, _ := config.NetworkInterface(); iface != nil {
		addrs, err := iface.Addrs()
		if err != nil {
			c.Ui.Error(fmt.Sprintf("Failed to get interface addresses: %s", err))
			return nil
		}
		if len(addrs) == 0 {
			c.Ui.Error(fmt.Sprintf("Interface '%s' has no addresses", config.Interface))
			return nil
		}

		// If there is no bind IP, pick an address
		if bindIP == "0.0.0.0" {
			found := false
			for _, a := range addrs {
				addr, ok := a.(*net.IPNet)
				if !ok {
					continue
				}
				// Skip self-assigned IPs
				if addr.IP.IsLinkLocalUnicast() {
					continue
				}

				// Found an IP
				found = true
				bindIP = addr.IP.String()
				c.Ui.Output(fmt.Sprintf("Using interface '%s' address '%s'",
					config.Interface, bindIP))

				// Update the configuration
				bindAddr := &net.TCPAddr{
					IP:   net.ParseIP(bindIP),
					Port: bindPort,
				}
				config.BindAddr = bindAddr.String()
				break
			}
			if !found {
				c.Ui.Error(fmt.Sprintf("Failed to find usable address for interface '%s'", config.Interface))
				return nil
			}

		} else {
			// If there is a bind IP, ensure it is available
			found := false
			for _, a := range addrs {
				addr, ok := a.(*net.IPNet)
				if !ok {
					continue
				}
				if addr.IP.String() == bindIP {
					found = true
					break
				}
			}
			if !found {
				c.Ui.Error(fmt.Sprintf("Interface '%s' has no '%s' address",
					config.Interface, bindIP))
				return nil
			}
		}
	}

	var advertiseIP string
	var advertisePort int
	if config.AdvertiseAddr != "" {
		advertiseIP, advertisePort, err = config.AddrParts(config.AdvertiseAddr)
		if err != nil {
			c.Ui.Error(fmt.Sprintf("Invalid advertise address: %s", err))
			return nil
		}
	}

	encryptKey, err := config.EncryptBytes()
	if err != nil {
		c.Ui.Error(fmt.Sprintf("Invalid encryption key: %s", err))
		return nil
	}

	serfConfig := serf.DefaultConfig()
	switch config.Profile {
	case "lan":
		serfConfig.MemberlistConfig = memberlist.DefaultLANConfig()
	case "wan":
		serfConfig.MemberlistConfig = memberlist.DefaultWANConfig()
	case "local":
		serfConfig.MemberlistConfig = memberlist.DefaultLocalConfig()
	default:
		c.Ui.Error(fmt.Sprintf("Unknown profile: %s", config.Profile))
		return nil
//.........這裏部分代碼省略.........

//.........這裏部分代碼省略.........
			}

		} else {
			// If there is a bind IP, ensure it is available
			found := false
			for _, a := range addrs {
				addr, ok := a.(*net.IPNet)
				if !ok {
					continue
				}
				if addr.IP.String() == bindIP {
					found = true
					break
				}
			}
			if !found {
				a.Ui.Error(fmt.Sprintf("Interface '%s' has no '%s' address",
					config.Interface, bindIP))
				return nil
			}
		}
	}

	var advertiseIP string
	var advertisePort int
	if config.AdvertiseAddr != "" {
		advertiseIP, advertisePort, err = config.AddrParts(config.AdvertiseAddr)
		if err != nil {
			a.Ui.Error(fmt.Sprintf("Invalid advertise address: %s", err))
			return nil
		}
	}

	encryptKey, err := config.EncryptBytes()
	if err != nil {
		a.Ui.Error(fmt.Sprintf("Invalid encryption key: %s", err))
		return nil
	}

	serfConfig := serf.DefaultConfig()
	switch config.Profile {
	case "lan":
		serfConfig.MemberlistConfig = memberlist.DefaultLANConfig()
	case "wan":
		serfConfig.MemberlistConfig = memberlist.DefaultWANConfig()
	case "local":
		serfConfig.MemberlistConfig = memberlist.DefaultLocalConfig()
	default:
		a.Ui.Error(fmt.Sprintf("Unknown profile: %s", config.Profile))
		return nil
	}

	serfConfig.MemberlistConfig.BindAddr = bindIP
	serfConfig.MemberlistConfig.BindPort = bindPort
	serfConfig.MemberlistConfig.AdvertiseAddr = advertiseIP
	serfConfig.MemberlistConfig.AdvertisePort = advertisePort
	serfConfig.MemberlistConfig.SecretKey = encryptKey
	serfConfig.NodeName = config.NodeName
	serfConfig.Tags = config.Tags
	serfConfig.SnapshotPath = config.SnapshotPath
	serfConfig.CoalescePeriod = 3 * time.Second
	serfConfig.QuiescentPeriod = time.Second
	serfConfig.UserCoalescePeriod = 3 * time.Second
	serfConfig.UserQuiescentPeriod = time.Second
	if config.ReconnectInterval != 0 {
		serfConfig.ReconnectInterval = config.ReconnectInterval
	}
	if config.ReconnectTimeout != 0 {
		serfConfig.ReconnectTimeout = config.ReconnectTimeout
	}
	if config.TombstoneTimeout != 0 {
		serfConfig.TombstoneTimeout = config.TombstoneTimeout
	}
	serfConfig.EnableNameConflictResolution = !config.DisableNameResolution
	if config.KeyringFile != "" {
		serfConfig.KeyringFile = config.KeyringFile
	}
	serfConfig.RejoinAfterLeave = config.RejoinAfterLeave

	// Create a channel to listen for events from Serf
	a.eventCh = make(chan serf.Event, 64)
	serfConfig.EventCh = a.eventCh

	// Start Serf
	a.Ui.Output("Starting Serf agent...")
	log.Info("agent: Serf agent starting")

	serfConfig.LogOutput = ioutil.Discard
	serfConfig.MemberlistConfig.LogOutput = ioutil.Discard

	// Create serf first
	serf, err := serf.Create(serfConfig)
	if err != nil {
		a.Ui.Error(err.Error())
		log.Error(err)
		return nil
	}

	return serf
}

// DefaultConfig is used to return a sane default configuration
func DefaultConfig() *Config {
	hostname, err := os.Hostname()
	if err != nil {
		panic(err)
	}

	conf := &Config{
		Datacenter:               DefaultDC,
		NodeName:                 hostname,
		RPCAddr:                  DefaultRPCAddr,
		RaftConfig:               raft.DefaultConfig(),
		SerfLANConfig:            serf.DefaultConfig(),
		SerfWANConfig:            serf.DefaultConfig(),
		ReconcileInterval:        60 * time.Second,
		ProtocolVersion:          ProtocolVersion2Compatible,
		ACLTTL:                   30 * time.Second,
		ACLDefaultPolicy:         "allow",
		ACLDownPolicy:            "extend-cache",
		ACLReplicationInterval:   30 * time.Second,
		ACLReplicationApplyLimit: 100, // ops / sec
		TombstoneTTL:             15 * time.Minute,
		TombstoneTTLGranularity:  30 * time.Second,
		SessionTTLMin:            10 * time.Second,
		DisableCoordinates:       false,

		// These are tuned to provide a total throughput of 128 updates
		// per second. If you update these, you should update the client-
		// side SyncCoordinateRateTarget parameter accordingly.
		CoordinateUpdatePeriod:     5 * time.Second,
		CoordinateUpdateBatchSize:  128,
		CoordinateUpdateMaxBatches: 5,

		// This holds RPCs during leader elections. For the default Raft
		// config the election timeout is 5 seconds, so we set this a
		// bit longer to try to cover that period. This should be more
		// than enough when running in the high performance mode.
		RPCHoldTimeout: 7 * time.Second,
	}

	// Increase our reap interval to 3 days instead of 24h.
	conf.SerfLANConfig.ReconnectTimeout = 3 * 24 * time.Hour
	conf.SerfWANConfig.ReconnectTimeout = 3 * 24 * time.Hour

	// WAN Serf should use the WAN timing, since we are using it
	// to communicate between DC's
	conf.SerfWANConfig.MemberlistConfig = memberlist.DefaultWANConfig()

	// Ensure we don't have port conflicts
	conf.SerfLANConfig.MemberlistConfig.BindPort = DefaultLANSerfPort
	conf.SerfWANConfig.MemberlistConfig.BindPort = DefaultWANSerfPort

	// Enable interoperability with unversioned Raft library, and don't
	// start using new ID-based features yet.
	conf.RaftConfig.ProtocolVersion = 1
	conf.ScaleRaft(DefaultRaftMultiplier)

	// Disable shutdown on removal
	conf.RaftConfig.ShutdownOnRemove = false

	// Check every 5 seconds to see if there are enough new entries for a snapshot
	conf.RaftConfig.SnapshotInterval = 5 * time.Second

	return conf
}