Пример #1
0
func releasePort(bnd netutils.PortBinding) error {
	// Construct the host side transport address
	host, err := bnd.HostAddr()
	if err != nil {
		return err
	}
	return portMapper.Unmap(host)
}
Пример #2
0
func allocatePort(bnd *netutils.PortBinding, containerIP, defHostIP net.IP, ulPxyEnabled bool) error {
	var (
		host net.Addr
		err  error
	)

	// Store the container interface address in the operational binding
	bnd.IP = containerIP

	// Adjust the host address in the operational binding
	if len(bnd.HostIP) == 0 {
		bnd.HostIP = defHostIP
	}

	// Construct the container side transport address
	container, err := bnd.ContainerAddr()
	if err != nil {
		return err
	}

	// Try up to maxAllocatePortAttempts times to get a port that's not already allocated.
	for i := 0; i < maxAllocatePortAttempts; i++ {
		if host, err = portMapper.Map(container, bnd.HostIP, int(bnd.HostPort), ulPxyEnabled); err == nil {
			break
		}
		// There is no point in immediately retrying to map an explicitly chosen port.
		if bnd.HostPort != 0 {
			logrus.Warnf("Failed to allocate and map port %d: %s", bnd.HostPort, err)
			break
		}
		logrus.Warnf("Failed to allocate and map port: %s, retry: %d", err, i+1)
	}
	if err != nil {
		return err
	}

	// Save the host port (regardless it was or not specified in the binding)
	switch netAddr := host.(type) {
	case *net.TCPAddr:
		bnd.HostPort = uint16(host.(*net.TCPAddr).Port)
		return nil
	case *net.UDPAddr:
		bnd.HostPort = uint16(host.(*net.UDPAddr).Port)
		return nil
	default:
		// For completeness
		return ErrUnsupportedAddressType(fmt.Sprintf("%T", netAddr))
	}
}
Пример #3
0
func (container *Container) buildCreateEndpointOptions() ([]libnetwork.EndpointOption, error) {
	var (
		portSpecs     = make(nat.PortSet)
		bindings      = make(nat.PortMap)
		pbList        []netutils.PortBinding
		exposeList    []netutils.TransportPort
		createOptions []libnetwork.EndpointOption
	)

	if container.Config.PortSpecs != nil {
		if err := migratePortMappings(container.Config, container.hostConfig); err != nil {
			return nil, err
		}
		container.Config.PortSpecs = nil
		if err := container.WriteHostConfig(); err != nil {
			return nil, err
		}
	}

	if container.Config.ExposedPorts != nil {
		portSpecs = container.Config.ExposedPorts
	}

	if container.hostConfig.PortBindings != nil {
		for p, b := range container.hostConfig.PortBindings {
			bindings[p] = []nat.PortBinding{}
			for _, bb := range b {
				bindings[p] = append(bindings[p], nat.PortBinding{
					HostIp:   bb.HostIp,
					HostPort: bb.HostPort,
				})
			}
		}
	}

	container.NetworkSettings.PortMapping = nil

	ports := make([]nat.Port, len(portSpecs))
	var i int
	for p := range portSpecs {
		ports[i] = p
		i++
	}
	nat.SortPortMap(ports, bindings)
	for _, port := range ports {
		expose := netutils.TransportPort{}
		expose.Proto = netutils.ParseProtocol(port.Proto())
		expose.Port = uint16(port.Int())
		exposeList = append(exposeList, expose)

		pb := netutils.PortBinding{Port: expose.Port, Proto: expose.Proto}
		binding := bindings[port]
		for i := 0; i < len(binding); i++ {
			pbCopy := pb.GetCopy()
			pbCopy.HostPort = uint16(nat.Port(binding[i].HostPort).Int())
			pbCopy.HostIP = net.ParseIP(binding[i].HostIp)
			pbList = append(pbList, pbCopy)
		}

		if container.hostConfig.PublishAllPorts && len(binding) == 0 {
			pbList = append(pbList, pb)
		}
	}

	createOptions = append(createOptions,
		libnetwork.CreateOptionPortMapping(pbList),
		libnetwork.CreateOptionExposedPorts(exposeList))

	if container.Config.MacAddress != "" {
		mac, err := net.ParseMAC(container.Config.MacAddress)
		if err != nil {
			return nil, err
		}

		genericOption := options.Generic{
			netlabel.MacAddress: mac,
		}

		createOptions = append(createOptions, libnetwork.EndpointOptionGeneric(genericOption))
	}

	return createOptions, nil
}