Пример #1
0
func main() {
	var config Config
	config.Backend.Type = "vxlan"
	if backend := os.Getenv("BACKEND"); backend != "" {
		config.Backend.Type = backend
	}
	config.Network = os.Getenv("NETWORK")
	if config.Network == "" {
		config.Network = "100.100.0.0/16"
	}
	flag.StringVar(&config.SubnetMin, "subnet-min", "", "container network min subnet")
	flag.StringVar(&config.SubnetMax, "subnet-max", "", "container network max subnet")
	flag.UintVar(&config.SubnetLen, "subnet-len", 0, "container network subnet length")
	flag.UintVar(&config.Backend.VNI, "vni", 0, "vxlan network identifier")
	flag.UintVar(&config.Backend.Port, "port", 0, "vxlan communication port (UDP)")
	flag.Parse()

	// wait for discoverd to come up
	status, err := cluster.WaitForHostStatus(os.Getenv("EXTERNAL_IP"), func(status *host.HostStatus) bool {
		return status.Discoverd != nil && status.Discoverd.URL != ""
	})
	if err != nil {
		log.Fatal(err)
	}

	// create service and config if not present
	client := discoverd.NewClientWithURL(status.Discoverd.URL)
	if err := client.AddService(serviceName, nil); err != nil && !hh.IsObjectExistsError(err) {
		log.Fatalf("error creating discoverd service: %s", err)
	}
	data, err := json.Marshal(map[string]Config{"config": config})
	if err != nil {
		log.Fatal(err)
	}
	err = client.Service(serviceName).SetMeta(&discoverd.ServiceMeta{Data: data})
	if err != nil && !hh.IsObjectExistsError(err) {
		log.Fatalf("error creating discoverd service metadata: %s", err)
	}

	flanneld, err := exec.LookPath("flanneld")
	if err != nil {
		log.Fatal(err)
	}

	if err := syscall.Exec(
		flanneld,
		[]string{
			flanneld,
			"-discoverd-url=" + status.Discoverd.URL,
			"-iface=" + os.Getenv("EXTERNAL_IP"),
			"-http-port=" + os.Getenv("PORT"),
			fmt.Sprintf("-notify-url=http://%s:1113/host/network", os.Getenv("EXTERNAL_IP")),
		},
		os.Environ(),
	); err != nil {
		log.Fatal(err)
	}
}
Пример #2
0
func waitHostDNSConfig() (addr string, resolvers []string) {
	// Wait for the host network.
	status, err := cluster.WaitForHostStatus(os.Getenv("EXTERNAL_IP"), func(status *host.HostStatus) bool {
		return status.Network != nil && status.Network.Subnet != ""
	})
	if err != nil {
		log.Fatal(err)
	}

	// Parse network subnet to determine bind address.
	ip, _, err := net.ParseCIDR(status.Network.Subnet)
	if err != nil {
		log.Fatal(err)
	}
	addr = net.JoinHostPort(ip.String(), "53")
	return addr, status.Network.Resolvers
}
Пример #3
0
Файл: main.go Проект: QY-Y/flynn
// Run executes the program.
func (m *Main) Run(args ...string) error {
	// Create logger.
	m.logger = log.New(m.Stdout, "", log.LstdFlags)

	// Parse command line flags.
	opt, err := m.ParseFlags(args...)
	if err != nil {
		return err
	}

	// Open listener.
	ln, err := net.Listen("tcp4", opt.Addr)
	if err != nil {
		return err
	}
	m.ln = ln

	// Multiplex listener to store and http api.
	storeLn, httpLn := server.Mux(ln)

	// Set up advertised address and default peer set.
	advertiseAddr := MergeHostPort(opt.Host, opt.Addr)
	if len(opt.Peers) == 0 {
		opt.Peers = []string{advertiseAddr}
	}

	// Open store if we are not proxying.
	if err := m.openStore(opt.DataDir, storeLn, advertiseAddr, opt.Peers); err != nil {
		return fmt.Errorf("Failed to open store: %s", err)
	}

	// Notify user that we're proxying if the store wasn't initialized.
	if m.store == nil {
		fmt.Fprintln(m.Stderr, "advertised address not in peer set, joining as proxy")
	}

	// Create a slice of peers with their HTTP address set instead.
	httpPeers, err := SetPortSlice(opt.Peers, opt.Addr)
	if err != nil {
		return fmt.Errorf("set port slice: %s", err)
	}

	// If we have a DNS address, start a DNS server right away, otherwise
	// wait for the host network to come up and then start a DNS server.
	if opt.DNSAddr != "" {
		if err := m.openDNSServer(opt.DNSAddr, opt.Recursors, httpPeers); err != nil {
			return fmt.Errorf("Failed to start DNS server: %s", err)
		}
		m.logger.Printf("discoverd listening for DNS on %s", opt.DNSAddr)
	} else if opt.WaitNetDNS {
		go func() {
			// Wait for the host network.
			status, err := cluster.WaitForHostStatus(os.Getenv("EXTERNAL_IP"), func(status *host.HostStatus) bool {
				return status.Network != nil && status.Network.Subnet != ""
			})
			if err != nil {
				log.Fatal(err)
			}

			// Parse network subnet to determine bind address.
			ip, _, err := net.ParseCIDR(status.Network.Subnet)
			if err != nil {
				log.Fatal(err)
			}
			addr := net.JoinHostPort(ip.String(), "53")

			if err := m.openDNSServer(addr, status.Network.Resolvers, httpPeers); err != nil {
				log.Fatalf("Failed to start DNS server: %s", err)
			}
			m.logger.Printf("discoverd listening for DNS on %s", addr)

			// Notify webhook.
			if opt.Notify != "" {
				m.Notify(opt.Notify, "", addr)
			}
		}()
	}

	if err := m.openHTTPServer(httpLn, opt.Peers); err != nil {
		return fmt.Errorf("Failed to start HTTP server: %s", err)
	}

	// Notify user that the servers are listening.
	m.logger.Printf("discoverd listening for HTTP on %s", opt.Addr)

	// FIXME(benbjohnson): Join to cluster.

	// Wait for leadership.
	if err := m.waitForLeader(LeaderTimeout); err != nil {
		return err
	}

	// Notify URL that discoverd is running.
	httpAddr := ln.Addr().String()
	host, port, _ := net.SplitHostPort(httpAddr)
	if host == "0.0.0.0" {
		httpAddr = net.JoinHostPort(os.Getenv("EXTERNAL_IP"), port)
	}
	m.Notify(opt.Notify, "http://"+httpAddr, opt.DNSAddr)
	go discoverd.NewClientWithURL("http://"+httpAddr).AddServiceAndRegister("discoverd", httpAddr)

	return nil
}
Пример #4
0
func waitForHostNetwork() (*host.HostStatus, error) {
	return cluster.WaitForHostStatus(func(status *host.HostStatus) bool {
		return status.Network != nil && status.Network.Subnet != ""
	})
}