Golang Job.GetenvInt方法代碼示例

// ConfigFromJob creates and returns a new DaemonConfig object
// by parsing the contents of a job's environment.
func ConfigFromJob(job *engine.Job) *Config {
	config := &Config{
		Pidfile:                     job.Getenv("Pidfile"),
		Root:                        job.Getenv("Root"),
		AutoRestart:                 job.GetenvBool("AutoRestart"),
		EnableIptables:              job.GetenvBool("EnableIptables"),
		EnableIpForward:             job.GetenvBool("EnableIpForward"),
		BridgeIP:                    job.Getenv("BridgeIP"),
		BridgeIface:                 job.Getenv("BridgeIface"),
		DefaultIp:                   net.ParseIP(job.Getenv("DefaultIp")),
		InterContainerCommunication: job.GetenvBool("InterContainerCommunication"),
		GraphDriver:                 job.Getenv("GraphDriver"),
		ExecDriver:                  job.Getenv("ExecDriver"),
		EnableSelinuxSupport:        false, // FIXME: hardcoded default to disable selinux for .10 release
	}
	if dns := job.GetenvList("Dns"); dns != nil {
		config.Dns = dns
	}
	if dnsSearch := job.GetenvList("DnsSearch"); dnsSearch != nil {
		config.DnsSearch = dnsSearch
	}
	if mtu := job.GetenvInt("Mtu"); mtu != 0 {
		config.Mtu = mtu
	} else {
		config.Mtu = GetDefaultNetworkMtu()
	}
	config.DisableNetwork = config.BridgeIface == DisableNetworkBridge

	return config
}

// ConfigFromJob creates and returns a new DaemonConfig object
// by parsing the contents of a job's environment.
func ConfigFromJob(job *engine.Job) *DaemonConfig {
	var config DaemonConfig
	config.Pidfile = job.Getenv("Pidfile")
	config.Root = job.Getenv("Root")
	config.AutoRestart = job.GetenvBool("AutoRestart")
	config.EnableCors = job.GetenvBool("EnableCors")
	if dns := job.GetenvList("Dns"); dns != nil {
		config.Dns = dns
	}
	config.EnableIptables = job.GetenvBool("EnableIptables")
	config.EnableIpForward = job.GetenvBool("EnableIpForward")
	if br := job.Getenv("BridgeIface"); br != "" {
		config.BridgeIface = br
	} else {
		config.BridgeIface = DefaultNetworkBridge
	}
	config.BridgeIp = job.Getenv("BridgeIp")
	config.DefaultIp = net.ParseIP(job.Getenv("DefaultIp"))
	config.InterContainerCommunication = job.GetenvBool("InterContainerCommunication")
	config.GraphDriver = job.Getenv("GraphDriver")
	if mtu := job.GetenvInt("Mtu"); mtu != -1 {
		config.Mtu = mtu
	} else {
		config.Mtu = DefaultNetworkMtu
	}
	return &config
}

// ConfigFromJob creates and returns a new DaemonConfig object
// by parsing the contents of a job's environment.
func DaemonConfigFromJob(job *engine.Job) *DaemonConfig {
	config := &DaemonConfig{
		Pidfile:                     job.Getenv("Pidfile"),
		Root:                        job.Getenv("Root"),
		AutoRestart:                 job.GetenvBool("AutoRestart"),
		EnableIptables:              job.GetenvBool("EnableIptables"),
		EnableIpForward:             job.GetenvBool("EnableIpForward"),
		BridgeIP:                    job.Getenv("BridgeIP"),
		BridgeIface:                 job.Getenv("BridgeIface"),
		DefaultIp:                   net.ParseIP(job.Getenv("DefaultIp")),
		InterContainerCommunication: job.GetenvBool("InterContainerCommunication"),
		GraphDriver:                 job.Getenv("GraphDriver"),
	}
	if dns := job.GetenvList("Dns"); dns != nil {
		config.Dns = dns
	}
	if mtu := job.GetenvInt("Mtu"); mtu != 0 {
		config.Mtu = mtu
	} else {
		config.Mtu = GetDefaultNetworkMtu()
	}
	config.DisableNetwork = config.BridgeIface == DisableNetworkBridge

	return config
}

// 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
}

// 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
}

// 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
}