Beispiel #1
0
// Create is used to create a new Agent. Returns
// the agent or potentially an error.
func Create(config *Config, logOutput io.Writer) (*Agent, error) {
	// Ensure we have a log sink
	if logOutput == nil {
		logOutput = os.Stderr
	}

	// Validate the config
	if config.Datacenter == "" {
		return nil, fmt.Errorf("Must configure a Datacenter")
	}
	if config.DataDir == "" {
		return nil, fmt.Errorf("Must configure a DataDir")
	}

	// Try to get an advertise address
	if config.AdvertiseAddr != "" {
		if ip := net.ParseIP(config.AdvertiseAddr); ip == nil {
			return nil, fmt.Errorf("Failed to parse advertise address: %v", config.AdvertiseAddr)
		}
	} else if config.BindAddr != "0.0.0.0" && config.BindAddr != "" {
		config.AdvertiseAddr = config.BindAddr
	} else {
		ip, err := consul.GetPrivateIP()
		if err != nil {
			return nil, fmt.Errorf("Failed to get advertise address: %v", err)
		}
		config.AdvertiseAddr = ip.IP.String()
	}

	agent := &Agent{
		config:        config,
		logger:        log.New(logOutput, "", log.LstdFlags),
		logOutput:     logOutput,
		checkMonitors: make(map[string]*CheckMonitor),
		checkTTLs:     make(map[string]*CheckTTL),
		shutdownCh:    make(chan struct{}),
	}

	// Initialize the local state
	agent.state.Init(config, agent.logger)

	// Setup either the client or the server
	var err error
	if config.Server {
		err = agent.setupServer()
		agent.state.SetIface(agent.server)
	} else {
		err = agent.setupClient()
		agent.state.SetIface(agent.client)
	}
	if err != nil {
		return nil, err
	}

	return agent, nil
}
Beispiel #2
0
// Create is used to create a new Agent. Returns
// the agent or potentially an error.
func Create(config *Config, logOutput io.Writer) (*Agent, error) {
	// Ensure we have a log sink
	if logOutput == nil {
		logOutput = os.Stderr
	}

	// Validate the config
	if config.Datacenter == "" {
		return nil, fmt.Errorf("Must configure a Datacenter")
	}
	if config.DataDir == "" {
		return nil, fmt.Errorf("Must configure a DataDir")
	}

	// Try to get an advertise address
	if config.AdvertiseAddr != "" {
		if ip := net.ParseIP(config.AdvertiseAddr); ip == nil {
			return nil, fmt.Errorf("Failed to parse advertise address: %v", config.AdvertiseAddr)
		}
	} else if config.BindAddr != "0.0.0.0" && config.BindAddr != "" {
		config.AdvertiseAddr = config.BindAddr
	} else {
		ip, err := consul.GetPrivateIP()
		if err != nil {
			return nil, fmt.Errorf("Failed to get advertise address: %v", err)
		}
		config.AdvertiseAddr = ip.String()
	}

	// Try to get an advertise address for the wan
	if config.AdvertiseAddrWan != "" {
		if ip := net.ParseIP(config.AdvertiseAddrWan); ip == nil {
			return nil, fmt.Errorf("Failed to parse advertise address for wan: %v", config.AdvertiseAddrWan)
		}
	} else {
		config.AdvertiseAddrWan = config.AdvertiseAddr
	}

	agent := &Agent{
		config:        config,
		logger:        log.New(logOutput, "", log.LstdFlags),
		logOutput:     logOutput,
		checkMonitors: make(map[string]*CheckMonitor),
		checkTTLs:     make(map[string]*CheckTTL),
		checkHTTPs:    make(map[string]*CheckHTTP),
		eventCh:       make(chan serf.UserEvent, 1024),
		eventBuf:      make([]*UserEvent, 256),
		shutdownCh:    make(chan struct{}),
	}

	// Initialize the local state
	agent.state.Init(config, agent.logger)

	// Setup either the client or the server
	var err error
	if config.Server {
		err = agent.setupServer()
		agent.state.SetIface(agent.server)

		// Automatically register the "consul" service on server nodes
		consulService := structs.NodeService{
			Service: consul.ConsulServiceName,
			ID:      consul.ConsulServiceID,
			Port:    agent.config.Ports.Server,
			Tags:    []string{},
		}
		agent.state.AddService(&consulService, "")
	} else {
		err = agent.setupClient()
		agent.state.SetIface(agent.client)
	}
	if err != nil {
		return nil, err
	}

	// Load checks/services
	if err := agent.loadServices(config); err != nil {
		return nil, err
	}
	if err := agent.loadChecks(config); err != nil {
		return nil, err
	}

	// Start handling events
	go agent.handleEvents()

	// Write out the PID file if necessary
	err = agent.storePid()
	if err != nil {
		return nil, err
	}

	return agent, nil
}
Beispiel #3
0
// Create is used to create a new Agent. Returns
// the agent or potentially an error.
func Create(config *Config, logOutput io.Writer) (*Agent, error) {
	// Ensure we have a log sink
	if logOutput == nil {
		logOutput = os.Stderr
	}

	// Validate the config
	if config.Datacenter == "" {
		return nil, fmt.Errorf("Must configure a Datacenter")
	}
	if config.DataDir == "" && !config.DevMode {
		return nil, fmt.Errorf("Must configure a DataDir")
	}

	// Try to get an advertise address
	if config.AdvertiseAddr != "" {
		if ip := net.ParseIP(config.AdvertiseAddr); ip == nil {
			return nil, fmt.Errorf("Failed to parse advertise address: %v", config.AdvertiseAddr)
		}
	} else if config.BindAddr != "0.0.0.0" && config.BindAddr != "" && config.BindAddr != "[::]" {
		config.AdvertiseAddr = config.BindAddr
	} else {
		var err error
		var ip net.IP
		if config.BindAddr == "[::]" {
			ip, err = consul.GetPublicIPv6()
		} else {
			ip, err = consul.GetPrivateIP()
		}
		if err != nil {
			return nil, fmt.Errorf("Failed to get advertise address: %v", err)
		}
		config.AdvertiseAddr = ip.String()
	}

	// Try to get an advertise address for the wan
	if config.AdvertiseAddrWan != "" {
		if ip := net.ParseIP(config.AdvertiseAddrWan); ip == nil {
			return nil, fmt.Errorf("Failed to parse advertise address for wan: %v", config.AdvertiseAddrWan)
		}
	} else {
		config.AdvertiseAddrWan = config.AdvertiseAddr
	}

	// Create the default set of tagged addresses.
	config.TaggedAddresses = map[string]string{
		"lan": config.AdvertiseAddr,
		"wan": config.AdvertiseAddrWan,
	}

	agent := &Agent{
		config:         config,
		logger:         log.New(logOutput, "", log.LstdFlags),
		logOutput:      logOutput,
		checkReapAfter: make(map[types.CheckID]time.Duration),
		checkMonitors:  make(map[types.CheckID]*CheckMonitor),
		checkTTLs:      make(map[types.CheckID]*CheckTTL),
		checkHTTPs:     make(map[types.CheckID]*CheckHTTP),
		checkTCPs:      make(map[types.CheckID]*CheckTCP),
		checkDockers:   make(map[types.CheckID]*CheckDocker),
		eventCh:        make(chan serf.UserEvent, 1024),
		eventBuf:       make([]*UserEvent, 256),
		shutdownCh:     make(chan struct{}),
		endpoints:      make(map[string]string),
	}

	// Initialize the local state.
	agent.state.Init(config, agent.logger)

	// Setup either the client or the server.
	var err error
	if config.Server {
		err = agent.setupServer()
		agent.state.SetIface(agent.server)

		// Automatically register the "consul" service on server nodes
		consulService := structs.NodeService{
			Service: consul.ConsulServiceName,
			ID:      consul.ConsulServiceID,
			Port:    agent.config.Ports.Server,
			Tags:    []string{},
		}
		agent.state.AddService(&consulService, "")
	} else {
		err = agent.setupClient()
		agent.state.SetIface(agent.client)
	}
	if err != nil {
		return nil, err
	}

	// Load checks/services.
	if err := agent.loadServices(config); err != nil {
		return nil, err
	}
	if err := agent.loadChecks(config); err != nil {
		return nil, err
	}

	// Start watching for critical services to deregister, based on their
	// checks.
	go agent.reapServices()

	// Start handling events.
	go agent.handleEvents()

	// Start sending network coordinate to the server.
	if !config.DisableCoordinates {
		go agent.sendCoordinate()
	}

	// Write out the PID file if necessary.
	err = agent.storePid()
	if err != nil {
		return nil, err
	}

	return agent, nil
}