Example #1
0
// ServeApi loops through all of the protocols sent in to docker and spawns
// off a go routine to setup a serving http.Server for each.
func ServeApi(job *engine.Job) engine.Status {
	if len(job.Args) == 0 {
		return job.Errorf("usage: %s PROTO://ADDR [PROTO://ADDR ...]", job.Name)
	}
	var (
		protoAddrs = job.Args
		chErrors   = make(chan error, len(protoAddrs))
	)
	activationLock = make(chan struct{})

	for _, protoAddr := range protoAddrs {
		protoAddrParts := strings.SplitN(protoAddr, "://", 2)
		if len(protoAddrParts) != 2 {
			return job.Errorf("usage: %s PROTO://ADDR [PROTO://ADDR ...]", job.Name)
		}
		go func() {
			log.Printf("Listening for HTTP on %s (%s)\n", protoAddrParts[0], protoAddrParts[1])
			chErrors <- ListenAndServe(protoAddrParts[0], protoAddrParts[1], job)
		}()
	}

	for i := 0; i < len(protoAddrs); i += 1 {
		err := <-chErrors
		if err != nil {
			return job.Error(err)
		}
	}

	return engine.StatusOK
}
Example #2
0
// Allocate a network interface
func Allocate(job *engine.Job) engine.Status {
	var (
		ip          *net.IP
		err         error
		id          = job.Args[0]
		requestedIP = net.ParseIP(job.Getenv("RequestedIP"))
	)

	if requestedIP != nil {
		ip, err = ipallocator.RequestIP(bridgeNetwork, &requestedIP)
	} else {
		ip, err = ipallocator.RequestIP(bridgeNetwork, nil)
	}
	if err != nil {
		return job.Error(err)
	}

	out := engine.Env{}
	out.Set("IP", ip.String())
	out.Set("Mask", bridgeNetwork.Mask.String())
	out.Set("Gateway", bridgeNetwork.IP.String())
	out.Set("Bridge", bridgeIface)

	size, _ := bridgeNetwork.Mask.Size()
	out.SetInt("IPPrefixLen", size)

	currentInterfaces.Set(id, &networkInterface{
		IP: *ip,
	})

	out.WriteTo(job.Stdout)

	return engine.StatusOK
}
Example #3
0
// CmdLookup return an image encoded in JSON
func (s *TagStore) CmdLookup(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	if image, err := s.LookupImage(name); err == nil && image != nil {
		if job.GetenvBool("dirty") {
			b, err := json.Marshal(image)
			if err != nil {
				return job.Error(err)
			}
			job.Stdout.Write(b)
			return engine.StatusOK
		}

		out := &engine.Env{}
		out.Set("Id", image.ID)
		out.Set("Parent", image.Parent)
		out.Set("Comment", image.Comment)
		out.SetAuto("Created", image.Created)
		out.Set("Container", image.Container)
		out.SetJson("ContainerConfig", image.ContainerConfig)
		out.Set("DockerVersion", image.DockerVersion)
		out.Set("Author", image.Author)
		out.SetJson("Config", image.Config)
		out.Set("Architecture", image.Architecture)
		out.Set("Os", image.OS)
		out.SetInt64("Size", image.Size)
		if _, err = out.WriteTo(job.Stdout); err != nil {
			return job.Error(err)
		}
		return engine.StatusOK
	}
	return job.Errorf("No such image: %s", name)
}
Example #4
0
// ServeApi loops through all of the protocols sent in to docker and spawns
// off a go routine to setup a serving http.Server for each.
func ServeApi(job *engine.Job) engine.Status {
	var (
		protoAddrs = job.Args
		chErrors   = make(chan error, len(protoAddrs))
	)
	activationLock = make(chan struct{})

	if err := job.Eng.Register("acceptconnections", AcceptConnections); err != nil {
		return job.Error(err)
	}

	for _, protoAddr := range protoAddrs {
		protoAddrParts := strings.SplitN(protoAddr, "://", 2)
		go func() {
			log.Printf("Listening for HTTP on %s (%s)\n", protoAddrParts[0], protoAddrParts[1])
			chErrors <- ListenAndServe(protoAddrParts[0], protoAddrParts[1], job.Eng, job.GetenvBool("Logging"), job.GetenvBool("EnableCors"), job.Getenv("Version"))
		}()
	}

	for i := 0; i < len(protoAddrs); i += 1 {
		err := <-chErrors
		if err != nil {
			return job.Error(err)
		}
	}

	return engine.StatusOK
}
Example #5
0
func LinkContainers(job *engine.Job) engine.Status {
	var (
		action       = job.Args[0]
		childIP      = job.Getenv("ChildIP")
		parentIP     = job.Getenv("ParentIP")
		ignoreErrors = job.GetenvBool("IgnoreErrors")
		ports        = job.GetenvList("Ports")
	)
	split := func(p string) (string, string) {
		parts := strings.Split(p, "/")
		return parts[0], parts[1]
	}

	for _, p := range ports {
		port, proto := split(p)
		if output, err := iptables.Raw(action, "FORWARD",
			"-i", bridgeIface, "-o", bridgeIface,
			"-p", proto,
			"-s", parentIP,
			"--dport", port,
			"-d", childIP,
			"-j", "ACCEPT"); !ignoreErrors && err != nil {
			job.Error(err)
			return engine.StatusErr
		} else if len(output) != 0 {
			job.Errorf("Error toggle iptables forward: %s", output)
			return engine.StatusErr
		}
	}
	return engine.StatusOK
}
Example #6
0
func (daemon *Daemon) ContainerInspect(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	if container := daemon.Get(name); container != nil {
		container.Lock()
		defer container.Unlock()
		if job.GetenvBool("raw") {
			b, err := json.Marshal(&struct {
				*Container
				HostConfig *runconfig.HostConfig
			}{container, container.hostConfig})
			if err != nil {
				return job.Error(err)
			}
			job.Stdout.Write(b)
			return engine.StatusOK
		}

		out := &engine.Env{}
		out.Set("Id", container.ID)
		out.SetAuto("Created", container.Created)
		out.Set("Path", container.Path)
		out.SetList("Args", container.Args)
		out.SetJson("Config", container.Config)
		out.SetJson("State", container.State)
		out.Set("Image", container.Image)
		out.SetJson("NetworkSettings", container.NetworkSettings)
		out.Set("ResolvConfPath", container.ResolvConfPath)
		out.Set("HostnamePath", container.HostnamePath)
		out.Set("HostsPath", container.HostsPath)
		out.Set("Name", container.Name)
		out.Set("Driver", container.Driver)
		out.Set("ExecDriver", container.ExecDriver)
		out.Set("MountLabel", container.MountLabel)
		out.Set("ProcessLabel", container.ProcessLabel)
		out.SetJson("Volumes", container.Volumes)
		out.SetJson("VolumesRW", container.VolumesRW)

		if children, err := daemon.Children(container.Name); err == nil {
			for linkAlias, child := range children {
				container.hostConfig.Links = append(container.hostConfig.Links, fmt.Sprintf("%s:%s", child.Name, linkAlias))
			}
		}

		out.SetJson("HostConfig", container.hostConfig)

		container.hostConfig.Links = nil
		if _, err := out.WriteTo(job.Stdout); err != nil {
			return job.Error(err)
		}
		return engine.StatusOK
	}
	return job.Errorf("No such container: %s", name)
}
// CmdLookup return an image encoded in JSON
func (s *TagStore) CmdLookup(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	if image, err := s.LookupImage(name); err == nil && image != nil {
		b, err := json.Marshal(image)
		if err != nil {
			return job.Error(err)
		}
		job.Stdout.Write(b)
		return engine.StatusOK
	}
	return job.Errorf("No such image: %s", name)
}
Example #8
0
// builtins jobs independent of any subsystem
func dockerVersion(job *engine.Job) engine.Status {
	v := &engine.Env{}
	v.Set("Version", dockerversion.VERSION)
	v.SetJson("ApiVersion", api.APIVERSION)
	v.Set("GitCommit", dockerversion.GITCOMMIT)
	v.Set("GoVersion", runtime.Version())
	v.Set("Os", runtime.GOOS)
	v.Set("Arch", runtime.GOARCH)
	if kernelVersion, err := utils.GetKernelVersion(); err == nil {
		v.Set("KernelVersion", kernelVersion.String())
	}
	if _, err := v.WriteTo(job.Stdout); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}
Example #9
0
// CmdTag assigns a new name and tag to an existing image. If the tag already exists,
// it is changed and the image previously referenced by the tag loses that reference.
// This may cause the old image to be garbage-collected if its reference count reaches zero.
//
// Syntax: image_tag NEWNAME OLDNAME
// Example: image_tag shykes/myapp:latest shykes/myapp:1.42.0
func (s *TagStore) CmdTag(job *engine.Job) engine.Status {
	if len(job.Args) != 2 {
		return job.Errorf("usage: %s NEWNAME OLDNAME", job.Name)
	}
	var (
		newName = job.Args[0]
		oldName = job.Args[1]
	)
	newRepo, newTag := utils.ParseRepositoryTag(newName)
	// FIXME: Set should either parse both old and new name, or neither.
	// 	the current prototype is inconsistent.
	if err := s.Set(newRepo, newTag, oldName, true); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}
Example #10
0
func (daemon *Daemon) ContainerInspect(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	if container := daemon.Get(name); container != nil {
		if job.GetenvBool("dirty") {
			b, err := json.Marshal(&struct {
				*Container
				HostConfig *runconfig.HostConfig
			}{container, container.HostConfig()})
			if err != nil {
				return job.Error(err)
			}
			job.Stdout.Write(b)
			return engine.StatusOK
		}

		out := &engine.Env{}
		out.Set("Id", container.ID)
		out.SetAuto("Created", container.Created)
		out.Set("Path", container.Path)
		out.SetList("Args", container.Args)
		out.SetJson("Config", container.Config)
		out.SetJson("State", container.State)
		out.Set("Image", container.Image)
		out.SetJson("NetworkSettings", container.NetworkSettings)
		out.Set("ResolvConfPath", container.ResolvConfPath)
		out.Set("HostnamePath", container.HostnamePath)
		out.Set("HostsPath", container.HostsPath)
		out.Set("Name", container.Name)
		out.Set("Driver", container.Driver)
		out.Set("ExecDriver", container.ExecDriver)
		out.Set("MountLabel", container.MountLabel)
		out.Set("ProcessLabel", container.ProcessLabel)
		out.SetJson("Volumes", container.Volumes)
		out.SetJson("VolumesRW", container.VolumesRW)
		out.SetJson("HostConfig", container.hostConfig)
		if _, err := out.WriteTo(job.Stdout); err != nil {
			return job.Error(err)
		}
		return engine.StatusOK
	}
	return job.Errorf("No such container: %s", name)
}
Example #11
0
func (daemon *Daemon) ContainerInspect(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	if container := daemon.Get(name); container != nil {
		b, err := json.Marshal(&struct {
			*Container
			HostConfig *runconfig.HostConfig
		}{container, container.HostConfig()})
		if err != nil {
			return job.Error(err)
		}
		job.Stdout.Write(b)
		return engine.StatusOK
	}
	return job.Errorf("No such container: %s", name)
}
Example #12
0
// Search queries the public registry for images matching the specified
// search terms, and returns the results.
//
// Argument syntax: search TERM
//
// Option environment:
//	'authConfig': json-encoded credentials to authenticate against the registry.
//		The search extends to images only accessible via the credentials.
//
//	'metaHeaders': extra HTTP headers to include in the request to the registry.
//		The headers should be passed as a json-encoded dictionary.
//
// Output:
//	Results are sent as a collection of structured messages (using engine.Table).
//	Each result is sent as a separate message.
//	Results are ordered by number of stars on the public registry.
func (s *Service) Search(job *engine.Job) engine.Status {
	if n := len(job.Args); n != 1 {
		return job.Errorf("Usage: %s TERM", job.Name)
	}
	var (
		term        = job.Args[0]
		metaHeaders = map[string][]string{}
		authConfig  = &AuthConfig{}
	)
	job.GetenvJson("authConfig", authConfig)
	job.GetenvJson("metaHeaders", metaHeaders)

	r, err := NewRegistry(authConfig, HTTPRequestFactory(metaHeaders), IndexServerAddress())
	if err != nil {
		return job.Error(err)
	}
	results, err := r.SearchRepositories(term)
	if err != nil {
		return job.Error(err)
	}
	outs := engine.NewTable("star_count", 0)
	for _, result := range results.Results {
		out := &engine.Env{}
		out.Import(result)
		outs.Add(out)
	}
	outs.ReverseSort()
	if _, err := outs.WriteListTo(job.Stdout); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}
Example #13
0
// Auth contacts the public registry with the provided credentials,
// and returns OK if authentication was sucessful.
// It can be used to verify the validity of a client's credentials.
func (s *Service) Auth(job *engine.Job) engine.Status {
	var (
		err        error
		authConfig = &AuthConfig{}
	)

	job.GetenvJson("authConfig", authConfig)
	// TODO: this is only done here because auth and registry need to be merged into one pkg
	if addr := authConfig.ServerAddress; addr != "" && addr != IndexServerAddress() {
		addr, err = ExpandAndVerifyRegistryUrl(addr)
		if err != nil {
			return job.Error(err)
		}
		authConfig.ServerAddress = addr
	}
	status, err := Login(authConfig, HTTPRequestFactory(nil))
	if err != nil {
		return job.Error(err)
	}
	job.Printf("%s\n", status)
	return engine.StatusOK
}
Example #14
0
// CmdGet returns information about an image.
// If the image doesn't exist, an empty object is returned, to allow
// checking for an image's existence.
func (s *TagStore) CmdGet(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	res := &engine.Env{}
	img, err := s.LookupImage(name)
	// Note: if the image doesn't exist, LookupImage returns
	// nil, nil.
	if err != nil {
		return job.Error(err)
	}
	if img != nil {
		// We don't directly expose all fields of the Image objects,
		// to maintain a clean public API which we can maintain over
		// time even if the underlying structure changes.
		// We should have done this with the Image object to begin with...
		// but we didn't, so now we're doing it here.
		//
		// Fields that we're probably better off not including:
		//	- ID (the caller already knows it, and we stay more flexible on
		//		naming down the road)
		//	- Parent. That field is really an implementation detail of
		//		layer storage ("layer is a diff against this other layer).
		//		It doesn't belong at the same level as author/description/etc.
		//	- Config/ContainerConfig. Those structs have the same sprawl problem,
		//		so we shouldn't include them wholesale either.
		//	- Comment: initially created to fulfill the "every image is a git commit"
		//		metaphor, in practice people either ignore it or use it as a
		//		generic description field which it isn't. On deprecation shortlist.
		res.Set("created", fmt.Sprintf("%v", img.Created))
		res.Set("author", img.Author)
		res.Set("os", img.OS)
		res.Set("architecture", img.Architecture)
		res.Set("docker_version", img.DockerVersion)
	}
	res.WriteTo(job.Stdout)
	return engine.StatusOK
}
Example #15
0
// CmdTarLayer return the tarLayer of the image
func (s *TagStore) CmdTarLayer(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	if image, err := s.LookupImage(name); err == nil && image != nil {
		fs, err := image.TarLayer()
		if err != nil {
			return job.Error(err)
		}
		defer fs.Close()

		if written, err := io.Copy(job.Stdout, fs); err != nil {
			return job.Error(err)
		} else {
			utils.Debugf("rendered layer for %s of [%d] size", image.ID, written)
		}

		return engine.StatusOK
	}
	return job.Errorf("No such image: %s", name)
}
Example #16
0
// CmdSet stores a new image in the graph.
// Images are stored in the graph using 4 elements:
//	- A user-defined ID
//	- A collection of metadata describing the image
//	- A directory tree stored as a tar archive (also called the "layer")
//	- A reference to a "parent" ID on top of which the layer should be applied
//
// NOTE: even though the parent ID is only useful in relation to the layer and how
// to apply it (ie you could represent the full directory tree as 'parent_layer + layer',
// it is treated as a top-level property of the image. This is an artifact of early
// design and should probably be cleaned up in the future to simplify the design.
//
// Syntax: image_set ID
// Input:
//	- Layer content must be streamed in tar format on stdin. An empty input is
//	valid and represents a nil layer.
//
//	- Image metadata must be passed in the command environment.
//		'json': a json-encoded object with all image metadata.
//			It will be stored as-is, without any encoding/decoding artifacts.
//			That is a requirement of the current registry client implementation,
//			because a re-encoded json might invalidate the image checksum at
//			the next upload, even with functionaly identical content.
func (s *TagStore) CmdSet(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	var (
		imgJSON = []byte(job.Getenv("json"))
		layer   = job.Stdin
	)
	if len(imgJSON) == 0 {
		return job.Errorf("mandatory key 'json' is not set")
	}
	// We have to pass an *image.Image object, even though it will be completely
	// ignored in favor of the redundant json data.
	// FIXME: the current prototype of Graph.Register is stupid and redundant.
	img, err := image.NewImgJSON(imgJSON)
	if err != nil {
		return job.Error(err)
	}
	if err := s.graph.Register(imgJSON, layer, img); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}
Example #17
0
// Initializes the plugin by handling job arguments
func (rax *RaxCloud) init(job *engine.Job) (status engine.Status) {
	app := cli.NewApp()
	app.Name = "rax"
	app.Usage = "Deploy Docker containers onto your Rackspace Cloud account. Accepts environment variables as listed in: https://github.com/openstack/python-novaclient/#command-line-api"
	app.Version = "0.0.1"
	app.Flags = []cli.Flag{
		cli.StringFlag{"instance", "", "Sets the server instance to target for specific commands such as version."},
		cli.StringFlag{"region", "DFW", "Sets the Rackspace region to target. This overrides any environment variables for region."},
		cli.StringFlag{"key", "/etc/swarmd/rax.id_rsa", "Sets SSH keys file to use when initializing secure connections."},
		cli.StringFlag{"user", "root", "Username to use when initializing secure connections."},
		cli.StringFlag{"image", "", "Image to use when provisioning new hosts."},
		cli.StringFlag{"flavor", "", "Flavor to use when provisioning new hosts."},
		cli.StringFlag{"auto-scaling", "none", "Flag that when set determines the mode used for auto-scaling."},
	}

	var err error
	app.Action = func(ctx *cli.Context) {
		err = rax.run(ctx, job.Eng)
	}

	if len(job.Args) > 1 {
		app.Run(append([]string{job.Name}, job.Args...))
	}

	// Failed to init?
	if err != nil || rax.gopher == nil {
		app.Run([]string{"rax", "help"})

		if err == nil {
			return engine.StatusErr
		} else {
			return job.Error(err)
		}
	}

	return engine.StatusOK
}
Example #18
0
// CmdGet returns information about an image.
// If the image doesn't exist, an empty object is returned, to allow
// checking for an image's existence.
func (s *TagStore) CmdGet(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	res := &engine.Env{}
	img, err := s.LookupImage(name)
	// Note: if the image doesn't exist, LookupImage returns
	// nil, nil.
	if err != nil {
		return job.Error(err)
	}
	if img != nil {
		// We don't directly expose all fields of the Image objects,
		// to maintain a clean public API which we can maintain over
		// time even if the underlying structure changes.
		// We should have done this with the Image object to begin with...
		// but we didn't, so now we're doing it here.
		//
		// Fields that we're probably better off not including:
		//	- Config/ContainerConfig. Those structs have the same sprawl problem,
		//		so we shouldn't include them wholesale either.
		//	- Comment: initially created to fulfill the "every image is a git commit"
		//		metaphor, in practice people either ignore it or use it as a
		//		generic description field which it isn't. On deprecation shortlist.
		res.SetAuto("Created", img.Created)
		res.Set("Author", img.Author)
		res.Set("Os", img.OS)
		res.Set("Architecture", img.Architecture)
		res.Set("DockerVersion", img.DockerVersion)
		res.Set("Id", img.ID)
		res.Set("Parent", img.Parent)
	}
	res.WriteTo(job.Stdout)
	return engine.StatusOK
}
Example #19
0
// ServeApi loops through all of the protocols sent in to docker and spawns
// off a go routine to setup a serving http.Server for each.
func ServeApi(job *engine.Job) engine.Status {
	protoAddrs := job.Args
	chErrors := make(chan error, len(protoAddrs))

	for _, protoAddr := range protoAddrs {
		protoAddrParts := strings.SplitN(protoAddr, "://", 2)
		go func() {
			log.Printf("Listening for HTTP on %s (%s)\n", protoAddrParts[0], protoAddrParts[1])
			chErrors <- ListenAndServe(protoAddrParts[0], protoAddrParts[1], job.Eng, job.GetenvBool("Logging"), job.GetenvBool("EnableCors"), job.Getenv("Version"))
		}()
	}

	for i := 0; i < len(protoAddrs); i += 1 {
		err := <-chErrors
		if err != nil {
			return job.Error(err)
		}
	}

	// Tell the init daemon we are accepting requests
	go systemd.SdNotify("READY=1")

	return engine.StatusOK
}
Example #20
0
// Allocate an external port and map it to the interface
func AllocatePort(job *engine.Job) engine.Status {
	var (
		err error

		ip            = defaultBindingIP
		id            = job.Args[0]
		hostIP        = job.Getenv("HostIP")
		hostPort      = job.GetenvInt("HostPort")
		containerPort = job.GetenvInt("ContainerPort")
		proto         = job.Getenv("Proto")
		network       = currentInterfaces[id]
	)

	if hostIP != "" {
		ip = net.ParseIP(hostIP)
	}

	// host ip, proto, and host port
	hostPort, err = portallocator.RequestPort(ip, proto, hostPort)
	if err != nil {
		job.Error(err)
		return engine.StatusErr
	}

	var (
		container net.Addr
		host      net.Addr
	)

	if proto == "tcp" {
		host = &net.TCPAddr{IP: ip, Port: hostPort}
		container = &net.TCPAddr{IP: network.IP, Port: containerPort}
	} else {
		host = &net.UDPAddr{IP: ip, Port: hostPort}
		container = &net.UDPAddr{IP: network.IP, Port: containerPort}
	}

	if err := portmapper.Map(container, ip, hostPort); err != nil {
		portallocator.ReleasePort(ip, proto, hostPort)

		job.Error(err)
		return engine.StatusErr
	}
	network.PortMappings = append(network.PortMappings, host)

	out := engine.Env{}
	out.Set("HostIP", ip.String())
	out.SetInt("HostPort", hostPort)

	if _, err := out.WriteTo(job.Stdout); err != nil {
		job.Error(err)
		return engine.StatusErr
	}
	return engine.StatusOK
}
Example #21
0
func InitDriver(job *engine.Job) engine.Status {
	var (
		network        *net.IPNet
		enableIPTables = job.GetenvBool("EnableIptables")
		icc            = job.GetenvBool("InterContainerCommunication")
		ipForward      = job.GetenvBool("EnableIpForward")
		bridgeIP       = job.Getenv("BridgeIP")
	)

	if defaultIP := job.Getenv("DefaultBindingIP"); defaultIP != "" {
		defaultBindingIP = net.ParseIP(defaultIP)
	}

	bridgeIface = job.Getenv("BridgeIface")
	usingDefaultBridge := false
	if bridgeIface == "" {
		usingDefaultBridge = true
		bridgeIface = DefaultNetworkBridge
	}

	addr, err := networkdriver.GetIfaceAddr(bridgeIface)
	if err != nil {
		// If we're not using the default bridge, fail without trying to create it
		if !usingDefaultBridge {
			job.Logf("bridge not found: %s", bridgeIface)
			return job.Error(err)
		}
		// If the iface is not found, try to create it
		job.Logf("creating new bridge for %s", bridgeIface)
		if err := createBridge(bridgeIP); err != nil {
			return job.Error(err)
		}

		job.Logf("getting iface addr")
		addr, err = networkdriver.GetIfaceAddr(bridgeIface)
		if err != nil {
			return job.Error(err)
		}
		network = addr.(*net.IPNet)
	} else {
		network = addr.(*net.IPNet)
		// validate that the bridge ip matches the ip specified by BridgeIP
		if bridgeIP != "" {
			bip, _, err := net.ParseCIDR(bridgeIP)
			if err != nil {
				return job.Error(err)
			}
			if !network.IP.Equal(bip) {
				return job.Errorf("bridge ip (%s) does not match existing bridge configuration %s", network.IP, bip)
			}
		}
	}

	// Configure iptables for link support
	if enableIPTables {
		if err := setupIPTables(addr, icc); err != nil {
			return job.Error(err)
		}
	}

	if ipForward {
		// Enable IPv4 forwarding
		if err := ioutil.WriteFile("/proc/sys/net/ipv4/ip_forward", []byte{'1', '\n'}, 0644); err != nil {
			job.Logf("WARNING: unable to enable IPv4 forwarding: %s\n", err)
		}
	}

	// We can always try removing the iptables
	if err := iptables.RemoveExistingChain("DOCKER"); err != nil {
		return job.Error(err)
	}

	if enableIPTables {
		chain, err := iptables.NewChain("DOCKER", bridgeIface)
		if err != nil {
			return job.Error(err)
		}
		portmapper.SetIptablesChain(chain)
	}

	bridgeNetwork = network

	// https://github.com/dotcloud/docker/issues/2768
	job.Eng.Hack_SetGlobalVar("httpapi.bridgeIP", bridgeNetwork.IP)

	for name, f := range map[string]engine.Handler{
		"allocate_interface": Allocate,
		"release_interface":  Release,
		"allocate_port":      AllocatePort,
		"link":               LinkContainers,
	} {
		if err := job.Eng.Register(name, f); err != nil {
			return job.Error(err)
		}
	}
	return engine.StatusOK
}
Example #22
0
// Allocate an external port and map it to the interface
func AllocatePort(job *engine.Job) engine.Status {
	var (
		err error

		ip            = defaultBindingIP
		id            = job.Args[0]
		hostIP        = job.Getenv("HostIP")
		origHostPort  = job.GetenvInt("HostPort")
		containerPort = job.GetenvInt("ContainerPort")
		proto         = job.Getenv("Proto")
		network       = currentInterfaces.Get(id)
	)

	if hostIP != "" {
		ip = net.ParseIP(hostIP)
	}

	var (
		hostPort  int
		container net.Addr
		host      net.Addr
	)

	/*
	 Try up to 10 times to get a port that's not already allocated.

	 In the event of failure to bind, return the error that portmapper.Map
	 yields.
	*/
	for i := 0; i < 10; i++ {
		// host ip, proto, and host port
		hostPort, err = portallocator.RequestPort(ip, proto, origHostPort)

		if err != nil {
			return job.Error(err)
		}

		if proto == "tcp" {
			host = &net.TCPAddr{IP: ip, Port: hostPort}
			container = &net.TCPAddr{IP: network.IP, Port: containerPort}
		} else {
			host = &net.UDPAddr{IP: ip, Port: hostPort}
			container = &net.UDPAddr{IP: network.IP, Port: containerPort}
		}

		if err = portmapper.Map(container, ip, hostPort); err == nil {
			break
		}

		job.Logf("Failed to bind %s:%d for container address %s:%d. Trying another port.", ip.String(), hostPort, network.IP.String(), containerPort)
	}

	if err != nil {
		return job.Error(err)
	}

	network.PortMappings = append(network.PortMappings, host)

	out := engine.Env{}
	out.Set("HostIP", ip.String())
	out.SetInt("HostPort", hostPort)

	if _, err := out.WriteTo(job.Stdout); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}
Example #23
0
// Allocate an external port and map it to the interface
func AllocatePort(job *engine.Job) engine.Status {
	var (
		err error

		ip            = defaultBindingIP
		id            = job.Args[0]
		hostIP        = job.Getenv("HostIP")
		hostPort      = job.GetenvInt("HostPort")
		containerPort = job.GetenvInt("ContainerPort")
		proto         = job.Getenv("Proto")
		network       = currentInterfaces.Get(id)
	)

	if hostIP != "" {
		ip = net.ParseIP(hostIP)
	}

	// host ip, proto, and host port
	var container net.Addr
	switch proto {
	case "tcp":
		container = &net.TCPAddr{IP: network.IP, Port: containerPort}
	case "udp":
		container = &net.UDPAddr{IP: network.IP, Port: containerPort}
	default:
		return job.Errorf("unsupported address type %s", proto)
	}

	//
	// Try up to 10 times to get a port that's not already allocated.
	//
	// In the event of failure to bind, return the error that portmapper.Map
	// yields.
	//

	var host net.Addr
	for i := 0; i < MaxAllocatedPortAttempts; i++ {
		if host, err = portmapper.Map(container, ip, hostPort); err == nil {
			break
		}

		if allocerr, ok := err.(portallocator.ErrPortAlreadyAllocated); ok {
			// There is no point in immediately retrying to map an explicitly
			// chosen port.
			if hostPort != 0 {
				job.Logf("Failed to bind %s for container address %s: %s", allocerr.IPPort(), container.String(), allocerr.Error())
				break
			}

			// Automatically chosen 'free' port failed to bind: move on the next.
			job.Logf("Failed to bind %s for container address %s. Trying another port.", allocerr.IPPort(), container.String())
		} else {
			// some other error during mapping
			job.Logf("Received an unexpected error during port allocation: %s", err.Error())
			break
		}
	}

	if err != nil {
		return job.Error(err)
	}

	network.PortMappings = append(network.PortMappings, host)

	out := engine.Env{}
	switch netAddr := host.(type) {
	case *net.TCPAddr:
		out.Set("HostIP", netAddr.IP.String())
		out.SetInt("HostPort", netAddr.Port)
	case *net.UDPAddr:
		out.Set("HostIP", netAddr.IP.String())
		out.SetInt("HostPort", netAddr.Port)
	}
	if _, err := out.WriteTo(job.Stdout); err != nil {
		return job.Error(err)
	}

	return engine.StatusOK
}