Golang docker.Client類代碼示例

func (alloc *Allocator) handleHTTPAllocate(dockerCli *docker.Client, w http.ResponseWriter, ident string, checkAlive bool, subnet address.CIDR) {
	closedChan := w.(http.CloseNotifier).CloseNotify()
	addr, err := alloc.Allocate(ident, subnet.HostRange(),
		func() bool {
			select {
			case <-closedChan:
				return true
			default:
				res := checkAlive && dockerCli != nil && dockerCli.IsContainerNotRunning(ident)
				checkAlive = false // we check only once; if the container dies later we learn about that through events
				return res
			}
		})
	if err != nil {
		if _, ok := err.(*errorCancelled); ok { // cancellation is not really an error
			common.Log.Infoln("[allocator]:", err.Error())
			fmt.Fprint(w, "cancelled")
			return
		}
		badRequest(w, err)
		return
	}

	fmt.Fprintf(w, "%s/%d", addr, subnet.PrefixLen)
}

func NewIpam(client *docker.Client, version string) (ipamapi.Ipam, error) {
	resolver := func() (string, error) {
		addr, err := client.GetContainerIP(WeaveContainer)
		if _, ok := err.(*godocker.NoSuchContainer); ok {
			return "", fmt.Errorf("%s container is not present. Have you launched it?", WeaveContainer)
		}
		return addr, err
	}
	return &ipam{client: client, weave: api.NewClientWithResolver(resolver)}, nil
}

func NewWatcher(client *docker.Client, driver *driver) (Watcher, error) {
	resolver := func() (string, error) { return client.GetContainerIP(WeaveContainer) }
	w := &watcher{client: client, driver: driver,
		weave: weaveapi.NewClientWithResolver(resolver)}
	err := client.AddObserver(w)
	if err != nil {
		return nil, err
	}

	return w, nil
}

func hasBeenCancelled(dockerCli *docker.Client, closedChan <-chan bool, ident string, checkAlive bool) func() bool {
	return func() bool {
		select {
		case <-closedChan:
			return true
		default:
			res := checkAlive && dockerCli != nil && dockerCli.IsContainerNotRunning(ident)
			checkAlive = false // we check only once; if the container dies later we learn about that through events
			return res
		}
	}
}

func (alloc *Allocator) handleHTTPAllocate(dockerCli *docker.Client, w http.ResponseWriter, ident string, checkAlive bool, subnet address.CIDR) {
	closedChan := w.(http.CloseNotifier).CloseNotify()
	addr, err := alloc.Allocate(ident, subnet.HostRange(), closedChan)
	if err != nil {
		if _, ok := err.(*errorCancelled); ok { // cancellation is not really an error
			common.Log.Infoln("[allocator]:", err.Error())
			fmt.Fprint(w, "cancelled")
			return
		}
		badRequest(w, err)
		return
	}
	if checkAlive && dockerCli != nil && dockerCli.IsContainerNotRunning(ident) {
		common.Log.Infof("[allocator] '%s' is not running: freeing %s", ident, addr)
		alloc.Free(ident, addr)
		fmt.Fprint(w, "cancelled")
		return
	}

	fmt.Fprintf(w, "%s/%d", addr, subnet.PrefixLen)
}

// HandleHTTP wires up ipams HTTP endpoints to the provided mux.
func (alloc *Allocator) HandleHTTP(router *mux.Router, defaultSubnet address.CIDR, dockerCli *docker.Client) {
	router.Methods("PUT").Path("/ip/{id}/{ip}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		closedChan := w.(http.CloseNotifier).CloseNotify()
		vars := mux.Vars(r)
		ident := vars["id"]
		ipStr := vars["ip"]
		if ip, err := address.ParseIP(ipStr); err != nil {
			badRequest(w, err)
			return
		} else if err := alloc.Claim(ident, ip, closedChan); err != nil {
			badRequest(w, fmt.Errorf("Unable to claim: %s", err))
			return
		}

		w.WriteHeader(204)
	})

	router.Methods("GET").Path("/ip/{id}/{ip}/{prefixlen}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		cidr := vars["ip"] + "/" + vars["prefixlen"]
		_, subnet, err := address.ParseCIDR(cidr)
		if err != nil {
			badRequest(w, err)
			return
		}
		addr, err := alloc.Lookup(vars["id"], subnet.HostRange())
		if err != nil {
			http.NotFound(w, r)
			return
		}
		fmt.Fprintf(w, "%s/%d", addr, subnet.PrefixLen)
	})

	router.Methods("GET").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		addr, err := alloc.Lookup(mux.Vars(r)["id"], defaultSubnet.HostRange())
		if err != nil {
			http.NotFound(w, r)
			return
		}
		fmt.Fprintf(w, "%s/%d", addr, defaultSubnet.PrefixLen)
	})

	router.Methods("POST").Path("/ip/{id}/{ip}/{prefixlen}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		closedChan := w.(http.CloseNotifier).CloseNotify()
		vars := mux.Vars(r)
		ident := vars["id"]
		cidrStr := vars["ip"] + "/" + vars["prefixlen"]
		subnetAddr, cidr, err := address.ParseCIDR(cidrStr)
		if err != nil {
			badRequest(w, err)
			return
		}
		if cidr.Start != subnetAddr {
			badRequest(w, fmt.Errorf("Invalid subnet %s - bits after network prefix are not all zero", cidrStr))
			return
		}
		addr, err := alloc.Allocate(ident, cidr.HostRange(), closedChan)
		if err != nil {
			badRequest(w, fmt.Errorf("Unable to allocate: %s", err))
			return
		}
		if dockerCli != nil && dockerCli.IsContainerNotRunning(ident) {
			common.Log.Infof("[allocator] '%s' is not running: freeing %s", ident, addr)
			alloc.Free(ident, addr)
			return
		}

		fmt.Fprintf(w, "%s/%d", addr, cidr.PrefixLen)
	})

	router.Methods("POST").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		closedChan := w.(http.CloseNotifier).CloseNotify()
		ident := mux.Vars(r)["id"]
		newAddr, err := alloc.Allocate(ident, defaultSubnet.HostRange(), closedChan)
		if err != nil {
			badRequest(w, err)
			return
		}
		if dockerCli != nil && dockerCli.IsContainerNotRunning(ident) {
			common.Log.Infof("[allocator] '%s' is not running: freeing %s", ident, newAddr)
			alloc.Free(ident, newAddr)
			return
		}

		fmt.Fprintf(w, "%s/%d", newAddr, defaultSubnet.PrefixLen)
	})

	router.Methods("DELETE").Path("/ip/{id}/{ip}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		ident := vars["id"]
		ipStr := vars["ip"]
		if ip, err := address.ParseIP(ipStr); err != nil {
			badRequest(w, err)
			return
		} else if err := alloc.Free(ident, ip); err != nil {
			badRequest(w, fmt.Errorf("Unable to free: %s", err))
			return
		}

//.........這裏部分代碼省略.........

func NewIpam(client *docker.Client, version string) (ipamapi.Ipam, error) {
	resolver := func() (string, error) { return client.GetContainerIP(WeaveContainer) }
	return &ipam{client: client, weave: api.NewClientWithResolver(resolver)}, nil
}

func main() {
	procs := runtime.NumCPU()
	// packet sniffing can block an OS thread, so we need one thread
	// for that plus at least one more.
	if procs < 2 {
		procs = 2
	}
	runtime.GOMAXPROCS(procs)

	var (
		justVersion        bool
		config             mesh.Config
		networkConfig      weave.NetworkConfig
		protocolMinVersion int
		resume             bool
		ifaceName          string
		routerName         string
		nickName           string
		password           string
		pktdebug           bool
		logLevel           string
		prof               string
		bufSzMB            int
		noDiscovery        bool
		httpAddr           string
		ipamConfig         ipamConfig
		dockerAPI          string
		peers              []string
		noDNS              bool
		dnsConfig          dnsConfig
		datapathName       string
		trustedSubnetStr   string
		dbPrefix           string
		isAWSVPC           bool

		defaultDockerHost = "unix:///var/run/docker.sock"
	)

	if val := os.Getenv("DOCKER_HOST"); val != "" {
		defaultDockerHost = val
	}

	mflag.BoolVar(&justVersion, []string{"#version", "-version"}, false, "print version and exit")
	mflag.StringVar(&config.Host, []string{"-host"}, "", "router host")
	mflag.IntVar(&config.Port, []string{"#port", "-port"}, mesh.Port, "router port")
	mflag.IntVar(&protocolMinVersion, []string{"-min-protocol-version"}, mesh.ProtocolMinVersion, "minimum weave protocol version")
	mflag.BoolVar(&resume, []string{"-resume"}, false, "resume connections to previous peers")
	mflag.StringVar(&ifaceName, []string{"#iface", "-iface"}, "", "name of interface to capture/inject from (disabled if blank)")
	mflag.StringVar(&routerName, []string{"#name", "-name"}, "", "name of router (defaults to MAC of interface)")
	mflag.StringVar(&nickName, []string{"#nickname", "-nickname"}, "", "nickname of peer (defaults to hostname)")
	mflag.StringVar(&password, []string{"#password", "-password"}, "", "network password")
	mflag.StringVar(&logLevel, []string{"-log-level"}, "info", "logging level (debug, info, warning, error)")
	mflag.BoolVar(&pktdebug, []string{"#pktdebug", "#-pktdebug", "-pkt-debug"}, false, "enable per-packet debug logging")
	mflag.StringVar(&prof, []string{"#profile", "-profile"}, "", "enable profiling and write profiles to given path")
	mflag.IntVar(&config.ConnLimit, []string{"#connlimit", "#-connlimit", "-conn-limit"}, 30, "connection limit (0 for unlimited)")
	mflag.BoolVar(&noDiscovery, []string{"#nodiscovery", "#-nodiscovery", "-no-discovery"}, false, "disable peer discovery")
	mflag.IntVar(&bufSzMB, []string{"#bufsz", "-bufsz"}, 8, "capture buffer size in MB")
	mflag.StringVar(&httpAddr, []string{"#httpaddr", "#-httpaddr", "-http-addr"}, "", "address to bind HTTP interface to (disabled if blank, absolute path indicates unix domain socket)")
	mflag.StringVar(&ipamConfig.Mode, []string{"-ipalloc-init"}, "", "allocator initialisation strategy (consensus, seed or observer)")
	mflag.StringVar(&ipamConfig.IPRangeCIDR, []string{"#iprange", "#-iprange", "-ipalloc-range"}, "", "IP address range reserved for automatic allocation, in CIDR notation")
	mflag.StringVar(&ipamConfig.IPSubnetCIDR, []string{"#ipsubnet", "#-ipsubnet", "-ipalloc-default-subnet"}, "", "subnet to allocate within by default, in CIDR notation")
	mflag.IntVar(&ipamConfig.PeerCount, []string{"#initpeercount", "#-initpeercount", "-init-peer-count"}, 0, "number of peers in network (for IP address allocation)")
	mflag.StringVar(&dockerAPI, []string{"#api", "#-api", "-docker-api"}, defaultDockerHost, "Docker API endpoint")
	mflag.BoolVar(&noDNS, []string{"-no-dns"}, false, "disable DNS server")
	mflag.StringVar(&dnsConfig.Domain, []string{"-dns-domain"}, nameserver.DefaultDomain, "local domain to server requests for")
	mflag.StringVar(&dnsConfig.ListenAddress, []string{"-dns-listen-address"}, nameserver.DefaultListenAddress, "address to listen on for DNS requests")
	mflag.IntVar(&dnsConfig.TTL, []string{"-dns-ttl"}, nameserver.DefaultTTL, "TTL for DNS request from our domain")
	mflag.DurationVar(&dnsConfig.ClientTimeout, []string{"-dns-fallback-timeout"}, nameserver.DefaultClientTimeout, "timeout for fallback DNS requests")
	mflag.StringVar(&dnsConfig.EffectiveListenAddress, []string{"-dns-effective-listen-address"}, "", "address DNS will actually be listening, after Docker port mapping")
	mflag.StringVar(&dnsConfig.ResolvConf, []string{"-resolv-conf"}, "", "path to resolver configuration for fallback DNS lookups")
	mflag.StringVar(&datapathName, []string{"-datapath"}, "", "ODP datapath name")
	mflag.StringVar(&trustedSubnetStr, []string{"-trusted-subnets"}, "", "comma-separated list of trusted subnets in CIDR notation")
	mflag.StringVar(&dbPrefix, []string{"-db-prefix"}, "/weavedb/weave", "pathname/prefix of filename to store data")
	mflag.BoolVar(&isAWSVPC, []string{"-awsvpc"}, false, "use AWS VPC for routing")

	// crude way of detecting that we probably have been started in a
	// container, with `weave launch` --> suppress misleading paths in
	// mflags error messages.
	if os.Args[0] == "/home/weave/weaver" { // matches the Dockerfile ENTRYPOINT
		os.Args[0] = "weave"
		mflag.CommandLine.Init("weave", mflag.ExitOnError)
	}

	mflag.Parse()

	peers = mflag.Args()
	if resume && len(peers) > 0 {
		Log.Fatalf("You must not specify an initial peer list in conjunction with --resume")
	}

	common.SetLogLevel(logLevel)

	if justVersion {
		fmt.Printf("weave router %s\n", version)
		os.Exit(0)
	}

	Log.Println("Command line options:", options())

	if prof != "" {
//.........這裏部分代碼省略.........

func main() {
	var (
		justVersion     bool
		dockerCli       *docker.Client
		ifaceName       string
		apiPath         string
		domain          string
		dnsPort         int
		httpIfaceName   string
		httpPort        int
		wait            int
		ttl             int
		negTTL          int
		timeout         int
		udpbuf          int
		fallback        string
		refreshInterval int
		relevantTime    int
		maxAnswers      int
		cacheLen        int
		cacheDisabled   bool
		watch           bool
		logLevel        string
		err             error
	)

	mflag.BoolVar(&justVersion, []string{"#version", "-version"}, false, "print version and exit")
	mflag.StringVar(&ifaceName, []string{"#iface", "-iface"}, "", "name of interface to use for multicast")
	mflag.StringVar(&apiPath, []string{"#api", "-api"}, "unix:///var/run/docker.sock", "path to Docker API socket")
	mflag.StringVar(&domain, []string{"#domain", "-domain"}, weavedns.DefaultLocalDomain, "local domain (ie, 'weave.local.')")
	mflag.IntVar(&wait, []string{"#wait", "-wait"}, -1, "number of seconds to wait for interfaces to come up (0=don't wait, -1=wait forever)")
	mflag.IntVar(&dnsPort, []string{"#dnsport", "#-dnsport", "-dns-port"}, weavedns.DefaultServerPort, "port to listen to DNS requests")
	mflag.StringVar(&httpIfaceName, []string{"#httpiface", "#-httpiface", "-http-iface"}, "", "interface on which to listen for HTTP requests (empty string means listen on all interfaces)")
	mflag.IntVar(&httpPort, []string{"#httpport", "#-httpport", "-http-port"}, weavedns.DefaultHTTPPort, "port to listen to HTTP requests")
	mflag.IntVar(&cacheLen, []string{"#cache", "-cache"}, weavedns.DefaultCacheLen, "cache length")
	mflag.IntVar(&ttl, []string{"#ttl", "-ttl"}, weavedns.DefaultLocalTTL, "TTL (in secs) for responses for local names")
	mflag.BoolVar(&watch, []string{"#watch", "-watch"}, true, "watch the docker socket for container events")
	mflag.StringVar(&logLevel, []string{"-log-level"}, "info", "logging level (debug, info, warning, error)")
	// advanced options
	mflag.IntVar(&negTTL, []string{"#neg-ttl", "-neg-ttl"}, 0, "negative TTL (in secs) for unanswered queries for local names (0=same value as --ttl")
	mflag.IntVar(&refreshInterval, []string{"#refresh", "-refresh"}, weavedns.DefaultRefreshInterval, "refresh interval (in secs) for local names (0=disable)")
	mflag.IntVar(&maxAnswers, []string{"#max-answers", "#-max-answers", "-dns-max-answers"}, weavedns.DefaultMaxAnswers, "maximum number of answers returned to clients (0=unlimited)")
	mflag.IntVar(&relevantTime, []string{"#relevant", "-relevant"}, weavedns.DefaultRelevantTime, "life time for info in the absence of queries (in secs)")
	mflag.IntVar(&udpbuf, []string{"#udpbuf", "#-udpbuf", "-dns-udpbuf"}, weavedns.DefaultUDPBuflen, "UDP buffer length for DNS")
	mflag.IntVar(&timeout, []string{"#timeout", "#-timeout", "-dns-timeout"}, weavedns.DefaultTimeout, "timeout for resolutions (in millisecs)")
	mflag.BoolVar(&cacheDisabled, []string{"#no-cache", "-no-cache"}, false, "disable the cache")
	mflag.StringVar(&fallback, []string{"#fallback", "#-fallback", "-dns-fallback"}, "", "force a fallback server (ie, '8.8.8.8:53') (instead of /etc/resolv.conf values)")
	mflag.Parse()

	if justVersion {
		fmt.Printf("weave DNS %s\n", version)
		os.Exit(0)
	}

	SetLogLevel(logLevel)
	Log.Infof("[main] WeaveDNS version %s", version) // first thing in log: the version

	var iface *net.Interface
	if ifaceName != "" {
		var err error
		Log.Infoln("[main] Waiting for mDNS interface", ifaceName, "to come up")
		iface, err = weavenet.EnsureInterface(ifaceName, wait)
		if err != nil {
			Log.Fatal(err)
		} else {
			Log.Infoln("[main] Interface", ifaceName, "is up")
		}
	}

	var httpIP string
	if httpIfaceName == "" {
		httpIP = "0.0.0.0"
	} else {
		Log.Infoln("[main] Waiting for HTTP interface", httpIfaceName, "to come up")
		httpIface, err := weavenet.EnsureInterface(httpIfaceName, wait)
		if err != nil {
			Log.Fatal(err)
		}
		Log.Infoln("[main] Interface", httpIfaceName, "is up")

		addrs, err := httpIface.Addrs()
		if err != nil {
			Log.Fatal(err)
		}

		if len(addrs) == 0 {
			Log.Fatal("[main] No addresses on HTTP interface")
		}

		ip, _, err := net.ParseCIDR(addrs[0].String())
		if err != nil {
			Log.Fatal(err)
		}

		httpIP = ip.String()

	}
	httpAddr := net.JoinHostPort(httpIP, strconv.Itoa(httpPort))

	zoneConfig := weavedns.ZoneConfig{
//.........這裏部分代碼省略.........

func main() {
	procs := runtime.NumCPU()
	// packet sniffing can block an OS thread, so we need one thread
	// for that plus at least one more.
	if procs < 2 {
		procs = 2
	}
	runtime.GOMAXPROCS(procs)

	var (
		config                    weave.Config
		justVersion               bool
		protocolMinVersion        int
		ifaceName                 string
		routerName                string
		nickName                  string
		password                  string
		pktdebug                  bool
		logLevel                  string
		prof                      string
		bufSzMB                   int
		noDiscovery               bool
		httpAddr                  string
		iprangeCIDR               string
		ipsubnetCIDR              string
		peerCount                 int
		dockerAPI                 string
		peers                     []string
		noDNS                     bool
		dnsDomain                 string
		dnsListenAddress          string
		dnsTTL                    int
		dnsClientTimeout          time.Duration
		dnsEffectiveListenAddress string
		iface                     *net.Interface
	)

	mflag.BoolVar(&justVersion, []string{"#version", "-version"}, false, "print version and exit")
	mflag.IntVar(&config.Port, []string{"#port", "-port"}, weave.Port, "router port")
	mflag.IntVar(&protocolMinVersion, []string{"-min-protocol-version"}, weave.ProtocolMinVersion, "minimum weave protocol version")
	mflag.StringVar(&ifaceName, []string{"#iface", "-iface"}, "", "name of interface to capture/inject from (disabled if blank)")
	mflag.StringVar(&routerName, []string{"#name", "-name"}, "", "name of router (defaults to MAC of interface)")
	mflag.StringVar(&nickName, []string{"#nickname", "-nickname"}, "", "nickname of peer (defaults to hostname)")
	mflag.StringVar(&password, []string{"#password", "-password"}, "", "network password")
	mflag.StringVar(&logLevel, []string{"-log-level"}, "info", "logging level (debug, info, warning, error)")
	mflag.BoolVar(&pktdebug, []string{"#pktdebug", "#-pktdebug", "-pkt-debug"}, false, "enable per-packet debug logging")
	mflag.StringVar(&prof, []string{"#profile", "-profile"}, "", "enable profiling and write profiles to given path")
	mflag.IntVar(&config.ConnLimit, []string{"#connlimit", "#-connlimit", "-conn-limit"}, 30, "connection limit (0 for unlimited)")
	mflag.BoolVar(&noDiscovery, []string{"#nodiscovery", "#-nodiscovery", "-no-discovery"}, false, "disable peer discovery")
	mflag.IntVar(&bufSzMB, []string{"#bufsz", "-bufsz"}, 8, "capture buffer size in MB")
	mflag.StringVar(&httpAddr, []string{"#httpaddr", "#-httpaddr", "-http-addr"}, fmt.Sprintf(":%d", weave.HTTPPort), "address to bind HTTP interface to (disabled if blank, absolute path indicates unix domain socket)")
	mflag.StringVar(&iprangeCIDR, []string{"#iprange", "#-iprange", "-ipalloc-range"}, "", "IP address range reserved for automatic allocation, in CIDR notation")
	mflag.StringVar(&ipsubnetCIDR, []string{"#ipsubnet", "#-ipsubnet", "-ipalloc-default-subnet"}, "", "subnet to allocate within by default, in CIDR notation")
	mflag.IntVar(&peerCount, []string{"#initpeercount", "#-initpeercount", "-init-peer-count"}, 0, "number of peers in network (for IP address allocation)")
	mflag.StringVar(&dockerAPI, []string{"#api", "#-api", "-docker-api"}, "", "Docker API endpoint, e.g. unix:///var/run/docker.sock")
	mflag.BoolVar(&noDNS, []string{"-no-dns"}, false, "disable DNS server")
	mflag.StringVar(&dnsDomain, []string{"-dns-domain"}, nameserver.DefaultDomain, "local domain to server requests for")
	mflag.StringVar(&dnsListenAddress, []string{"-dns-listen-address"}, nameserver.DefaultListenAddress, "address to listen on for DNS requests")
	mflag.IntVar(&dnsTTL, []string{"-dns-ttl"}, nameserver.DefaultTTL, "TTL for DNS request from our domain")
	mflag.DurationVar(&dnsClientTimeout, []string{"-dns-fallback-timeout"}, nameserver.DefaultClientTimeout, "timeout for fallback DNS requests")
	mflag.StringVar(&dnsEffectiveListenAddress, []string{"-dns-effective-listen-address"}, "", "address DNS will actually be listening, after Docker port mapping")

	// crude way of detecting that we probably have been started in a
	// container, with `weave launch` --> suppress misleading paths in
	// mflags error messages.
	if os.Args[0] == "/home/weave/weaver" { // matches the Dockerfile ENTRYPOINT
		os.Args[0] = "weave"
		mflag.CommandLine.Init("weave", mflag.ExitOnError)
	}
	mflag.Parse()

	peers = mflag.Args()

	SetLogLevel(logLevel)
	if justVersion {
		fmt.Printf("weave router %s\n", version)
		os.Exit(0)
	}

	Log.Println("Command line options:", options())
	Log.Println("Command line peers:", peers)

	if protocolMinVersion < weave.ProtocolMinVersion || protocolMinVersion > weave.ProtocolMaxVersion {
		Log.Fatalf("--min-protocol-version must be in range [%d,%d]", weave.ProtocolMinVersion, weave.ProtocolMaxVersion)
	}
	config.ProtocolMinVersion = byte(protocolMinVersion)

	var err error

	if ifaceName != "" {
		iface, err := weavenet.EnsureInterface(ifaceName)
		if err != nil {
			Log.Fatal(err)
		}

		// bufsz flag is in MB
		config.Bridge, err = weave.NewPcap(iface, bufSzMB*1024*1024)
		if err != nil {
			Log.Fatal(err)
		}
//.........這裏部分代碼省略.........

func (n *Nameserver) HandleHTTP(router *mux.Router, dockerCli *docker.Client) {
	router.Methods("GET").Path("/domain").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprint(w, n.domain)
	})

	router.Methods("PUT").Path("/name/{container}/{ip}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		var (
			vars      = mux.Vars(r)
			container = vars["container"]
			ipStr     = vars["ip"]
			hostname  = dns.Fqdn(r.FormValue("fqdn"))
			ip, err   = address.ParseIP(ipStr)
		)
		if err != nil {
			n.badRequest(w, err)
			return
		}

		if err := n.AddEntry(hostname, container, n.ourName, ip); err != nil {
			n.badRequest(w, fmt.Errorf("Unable to add entry: %v", err))
			return
		}

		if r.FormValue("check-alive") == "true" && dockerCli != nil && dockerCli.IsContainerNotRunning(container) {
			n.infof("container '%s' is not running: removing", container)
			if err := n.Delete(hostname, container, ipStr, ip); err != nil {
				n.infof("failed to remove: %v", err)
			}
		}

		w.WriteHeader(204)
	})

	deleteHandler := func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)

		hostname := r.FormValue("fqdn")
		if hostname == "" {
			hostname = "*"
		} else {
			hostname = dns.Fqdn(hostname)
		}

		container, ok := vars["container"]
		if !ok {
			container = "*"
		}

		ipStr, ok := vars["ip"]
		ip, err := address.ParseIP(ipStr)
		if ok && err != nil {
			n.badRequest(w, err)
			return
		} else if !ok {
			ipStr = "*"
		}

		if err := n.Delete(hostname, container, ipStr, ip); err != nil {
			n.badRequest(w, fmt.Errorf("Unable to delete entries: %v", err))
			return
		}
		w.WriteHeader(204)
	}
	router.Methods("DELETE").Path("/name/{container}/{ip}").HandlerFunc(deleteHandler)
	router.Methods("DELETE").Path("/name/{container}").HandlerFunc(deleteHandler)
	router.Methods("DELETE").Path("/name").HandlerFunc(deleteHandler)

	router.Methods("GET").Path("/name").Headers("Accept", "application/json").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		n.RLock()
		defer n.RUnlock()
		if err := json.NewEncoder(w).Encode(n.entries); err != nil {
			n.badRequest(w, fmt.Errorf("Error marshalling response: %v", err))
		}
	})
}

func main() {
	procs := runtime.NumCPU()
	// packet sniffing can block an OS thread, so we need one thread
	// for that plus at least one more.
	if procs < 2 {
		procs = 2
	}
	runtime.GOMAXPROCS(procs)

	var (
		// flags that cause immediate exit
		justVersion          bool
		createDatapath       bool
		deleteDatapath       bool
		addDatapathInterface string

		config                    mesh.Config
		networkConfig             weave.NetworkConfig
		protocolMinVersion        int
		ifaceName                 string
		routerName                string
		nickName                  string
		password                  string
		pktdebug                  bool
		logLevel                  string
		prof                      string
		bufSzMB                   int
		noDiscovery               bool
		httpAddr                  string
		iprangeCIDR               string
		ipsubnetCIDR              string
		peerCount                 int
		dockerAPI                 string
		peers                     []string
		noDNS                     bool
		dnsDomain                 string
		dnsListenAddress          string
		dnsTTL                    int
		dnsClientTimeout          time.Duration
		dnsEffectiveListenAddress string
		iface                     *net.Interface
		datapathName              string
		trustedSubnetStr          string

		defaultDockerHost = "unix:///var/run/docker.sock"
	)

	if val := os.Getenv("DOCKER_HOST"); val != "" {
		defaultDockerHost = val
	}

	mflag.BoolVar(&justVersion, []string{"#version", "-version"}, false, "print version and exit")
	mflag.BoolVar(&createDatapath, []string{"-create-datapath"}, false, "create ODP datapath and exit")
	mflag.BoolVar(&deleteDatapath, []string{"-delete-datapath"}, false, "delete ODP datapath and exit")
	mflag.StringVar(&addDatapathInterface, []string{"-add-datapath-iface"}, "", "add a network interface to the ODP datapath and exit")

	mflag.IntVar(&config.Port, []string{"#port", "-port"}, mesh.Port, "router port")
	mflag.IntVar(&protocolMinVersion, []string{"-min-protocol-version"}, mesh.ProtocolMinVersion, "minimum weave protocol version")
	mflag.StringVar(&ifaceName, []string{"#iface", "-iface"}, "", "name of interface to capture/inject from (disabled if blank)")
	mflag.StringVar(&routerName, []string{"#name", "-name"}, "", "name of router (defaults to MAC of interface)")
	mflag.StringVar(&nickName, []string{"#nickname", "-nickname"}, "", "nickname of peer (defaults to hostname)")
	mflag.StringVar(&password, []string{"#password", "-password"}, "", "network password")
	mflag.StringVar(&logLevel, []string{"-log-level"}, "info", "logging level (debug, info, warning, error)")
	mflag.BoolVar(&pktdebug, []string{"#pktdebug", "#-pktdebug", "-pkt-debug"}, false, "enable per-packet debug logging")
	mflag.StringVar(&prof, []string{"#profile", "-profile"}, "", "enable profiling and write profiles to given path")
	mflag.IntVar(&config.ConnLimit, []string{"#connlimit", "#-connlimit", "-conn-limit"}, 30, "connection limit (0 for unlimited)")
	mflag.BoolVar(&noDiscovery, []string{"#nodiscovery", "#-nodiscovery", "-no-discovery"}, false, "disable peer discovery")
	mflag.IntVar(&bufSzMB, []string{"#bufsz", "-bufsz"}, 8, "capture buffer size in MB")
	mflag.StringVar(&httpAddr, []string{"#httpaddr", "#-httpaddr", "-http-addr"}, "", "address to bind HTTP interface to (disabled if blank, absolute path indicates unix domain socket)")
	mflag.StringVar(&iprangeCIDR, []string{"#iprange", "#-iprange", "-ipalloc-range"}, "", "IP address range reserved for automatic allocation, in CIDR notation")
	mflag.StringVar(&ipsubnetCIDR, []string{"#ipsubnet", "#-ipsubnet", "-ipalloc-default-subnet"}, "", "subnet to allocate within by default, in CIDR notation")
	mflag.IntVar(&peerCount, []string{"#initpeercount", "#-initpeercount", "-init-peer-count"}, 0, "number of peers in network (for IP address allocation)")
	mflag.StringVar(&dockerAPI, []string{"#api", "#-api", "-docker-api"}, defaultDockerHost, "Docker API endpoint")
	mflag.BoolVar(&noDNS, []string{"-no-dns"}, false, "disable DNS server")
	mflag.StringVar(&dnsDomain, []string{"-dns-domain"}, nameserver.DefaultDomain, "local domain to server requests for")
	mflag.StringVar(&dnsListenAddress, []string{"-dns-listen-address"}, nameserver.DefaultListenAddress, "address to listen on for DNS requests")
	mflag.IntVar(&dnsTTL, []string{"-dns-ttl"}, nameserver.DefaultTTL, "TTL for DNS request from our domain")
	mflag.DurationVar(&dnsClientTimeout, []string{"-dns-fallback-timeout"}, nameserver.DefaultClientTimeout, "timeout for fallback DNS requests")
	mflag.StringVar(&dnsEffectiveListenAddress, []string{"-dns-effective-listen-address"}, "", "address DNS will actually be listening, after Docker port mapping")
	mflag.StringVar(&datapathName, []string{"-datapath"}, "", "ODP datapath name")

	mflag.StringVar(&trustedSubnetStr, []string{"-trusted-subnets"}, "", "Command separated list of trusted subnets in CIDR notation")

	// crude way of detecting that we probably have been started in a
	// container, with `weave launch` --> suppress misleading paths in
	// mflags error messages.
	if os.Args[0] == "/home/weave/weaver" { // matches the Dockerfile ENTRYPOINT
		os.Args[0] = "weave"
		mflag.CommandLine.Init("weave", mflag.ExitOnError)
	}

	mflag.Parse()

	peers = mflag.Args()

	SetLogLevel(logLevel)

	switch {
	case justVersion:
		fmt.Printf("weave router %s\n", version)
//.........這裏部分代碼省略.........

func ServeHTTP(listener net.Listener, version string, server *DNSServer, dockerCli *docker.Client) {

	muxRouter := mux.NewRouter()

	muxRouter.Methods("GET").Path("/status").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintln(w, "weave DNS", version)
		fmt.Fprintln(w, server.Status())
		fmt.Fprintln(w, server.Zone.Status())
	})

	muxRouter.Methods("GET").Path("/domain").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprint(w, server.Zone.Domain())
	})

	muxRouter.Methods("PUT").Path("/name/{id:.+}/{ip:.+}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		reqError := func(msg string, logmsg string, logargs ...interface{}) {
			httpErrorAndLog(Warning, w, msg, http.StatusBadRequest, logmsg, logargs...)
		}

		vars := mux.Vars(r)
		idStr := vars["id"]
		ipStr := vars["ip"]
		name := r.FormValue("fqdn")

		if name == "" {
			reqError("Invalid FQDN", "Invalid FQDN in request: %s, %s", r.URL, r.Form)
			return
		}

		ip := net.ParseIP(ipStr)
		if ip == nil {
			reqError("Invalid IP", "Invalid IP in request: %s", ipStr)
			return
		}

		domain := server.Zone.Domain()
		if !dns.IsSubDomain(domain, name) {
			Info.Printf("[http] Ignoring name %s, not in %s", name, domain)
			return
		}
		Info.Printf("[http] Adding %s -> %s", name, ipStr)
		if err := server.Zone.AddRecord(idStr, name, ip); err != nil {
			if _, ok := err.(DuplicateError); !ok {
				httpErrorAndLog(
					Error, w, "Internal error", http.StatusInternalServerError,
					"Unexpected error from DB: %s", err)
				return
			} // oh, I already know this. whatever.
		}

		if dockerCli != nil && dockerCli.IsContainerNotRunning(idStr) {
			Info.Printf("[http] '%s' is not running: removing", idStr)
			server.Zone.DeleteRecords(idStr, name, ip)
		}
	})

	muxRouter.Methods("DELETE").Path("/name/{id:.+}/{ip:.+}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		idStr := vars["id"]
		ipStr := vars["ip"]

		ip := net.ParseIP(ipStr)
		if ip == nil {
			httpErrorAndLog(
				Warning, w, "Invalid IP in request", http.StatusBadRequest,
				"Invalid IP in request: %s", ipStr)
			return
		}

		fqdnStr, fqdn := extractFQDN(r)

		Info.Printf("[http] Deleting ID %s, IP %s, FQDN %s", idStr, ipStr, fqdnStr)
		server.Zone.DeleteRecords(idStr, fqdn, ip)
	})

	muxRouter.Methods("DELETE").Path("/name/{id:.+}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		idStr := vars["id"]

		fqdnStr, fqdn := extractFQDN(r)

		Info.Printf("[http] Deleting ID %s, IP *, FQDN %s", idStr, fqdnStr)
		server.Zone.DeleteRecords(idStr, fqdn, net.IP{})
	})

	muxRouter.Methods("DELETE").Path("/name").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fqdnStr, fqdn := extractFQDN(r)

		Info.Printf("[http] Deleting ID *, IP *, FQDN %s", fqdnStr)
		server.Zone.DeleteRecords("", fqdn, net.IP{})
	})

	http.Handle("/", muxRouter)

	if err := http.Serve(listener, nil); err != nil {
		Error.Fatal("[http] Unable to serve http: ", err)
	}
}

//.........這裏部分代碼省略.........
	flag.BoolVar(&noDiscovery, "nodiscovery", false, "disable peer discovery")
	flag.IntVar(&bufSzMB, "bufsz", 8, "capture buffer size in MB")
	flag.StringVar(&httpAddr, "httpaddr", fmt.Sprintf(":%d", weave.HTTPPort), "address to bind HTTP interface to (disabled if blank, absolute path indicates unix domain socket)")
	flag.StringVar(&iprangeCIDR, "iprange", "", "IP address range reserved for automatic allocation, in CIDR notation")
	flag.StringVar(&ipsubnetCIDR, "ipsubnet", "", "subnet to allocate within by default, in CIDR notation")
	flag.IntVar(&peerCount, "initpeercount", 0, "number of peers in network (for IP address allocation)")
	flag.StringVar(&apiPath, "api", "unix:///var/run/docker.sock", "Path to Docker API socket")
	flag.Parse()
	peers = flag.Args()

	SetLogLevel(logLevel)
	if justVersion {
		fmt.Printf("weave router %s\n", version)
		os.Exit(0)
	}

	Log.Println("Command line options:", options())
	Log.Println("Command line peers:", peers)

	var err error

	if ifaceName != "" {
		config.Iface, err = weavenet.EnsureInterface(ifaceName, wait)
		if err != nil {
			Log.Fatal(err)
		}
	}

	if routerName == "" {
		if config.Iface == nil {
			Log.Fatal("Either an interface must be specified with -iface or a name with -name")
		}
		routerName = config.Iface.HardwareAddr.String()
	}
	name, err := weave.PeerNameFromUserInput(routerName)
	if err != nil {
		Log.Fatal(err)
	}

	if nickName == "" {
		nickName, err = os.Hostname()
		if err != nil {
			Log.Fatal(err)
		}
	}

	if password == "" {
		password = os.Getenv("WEAVE_PASSWORD")
	}
	if password == "" {
		Log.Println("Communication between peers is unencrypted.")
	} else {
		config.Password = []byte(password)
		Log.Println("Communication between peers is encrypted.")
	}

	if prof != "" {
		p := *profile.CPUProfile
		p.ProfilePath = prof
		p.NoShutdownHook = true
		defer profile.Start(&p).Stop()
	}

	config.BufSz = bufSzMB * 1024 * 1024
	config.LogFrame = logFrameFunc(pktdebug)
	config.PeerDiscovery = !noDiscovery

	router := weave.NewRouter(config, name, nickName)
	Log.Println("Our name is", router.Ourself)

	var allocator *ipam.Allocator
	var defaultSubnet address.CIDR
	var dockerCli *docker.Client
	if iprangeCIDR != "" {
		allocator, defaultSubnet = createAllocator(router, iprangeCIDR, ipsubnetCIDR, determineQuorum(peerCount, peers))
		dockerCli, err = docker.NewClient(apiPath)
		if err != nil {
			Log.Fatal("Unable to start docker client: ", err)
		}
		if err = dockerCli.AddObserver(allocator); err != nil {
			Log.Fatal("Unable to start watcher", err)
		}
	} else if peerCount > 0 {
		Log.Fatal("-initpeercount flag specified without -iprange")
	}

	router.Start()
	if errors := router.ConnectionMaker.InitiateConnections(peers, false); len(errors) > 0 {
		Log.Fatal(errorMessages(errors))
	}

	// The weave script always waits for a status call to succeed,
	// so there is no point in doing "weave launch -httpaddr ''".
	// This is here to support stand-alone use of weaver.
	if httpAddr != "" {
		go handleHTTP(router, httpAddr, allocator, defaultSubnet, dockerCli)
	}

	SignalHandlerLoop(router)
}

func NewWatcher(client *docker.Client, weave *weaveapi.Client, driver *driver) (Watcher, error) {
	w := &watcher{client: client, weave: weave, driver: driver}
	return w, client.AddObserver(w)
}