Example #1
0
func memoryReservation(container *libcontainer.Container, context interface{}, value string) error {
	if container.Cgroups == nil {
		return fmt.Errorf("cannot set cgroups when they are disabled")
	}

	v, err := utils.RAMInBytes(value)
	if err != nil {
		return err
	}
	container.Cgroups.MemoryReservation = v
	return nil
}
Example #2
0
func parseRun(cmd *flag.FlagSet, args []string, sysInfo *sysinfo.SysInfo) (*Config, *HostConfig, *flag.FlagSet, error) {
	var (
		// FIXME: use utils.ListOpts for attach and volumes?
		flAttach  = opts.NewListOpts(opts.ValidateAttach)
		flVolumes = opts.NewListOpts(opts.ValidatePath)
		flLinks   = opts.NewListOpts(opts.ValidateLink)
		flEnv     = opts.NewListOpts(opts.ValidateEnv)

		flPublish     opts.ListOpts
		flExpose      opts.ListOpts
		flDns         opts.ListOpts
		flVolumesFrom opts.ListOpts
		flLxcOpts     opts.ListOpts

		flAutoRemove      = cmd.Bool([]string{"#rm", "-rm"}, false, "Automatically remove the container when it exits (incompatible with -d)")
		flDetach          = cmd.Bool([]string{"d", "-detach"}, false, "Detached mode: Run container in the background, print new container id")
		flNetwork         = cmd.Bool([]string{"n", "-networking"}, true, "Enable networking for this container")
		flPrivileged      = cmd.Bool([]string{"#privileged", "-privileged"}, false, "Give extended privileges to this container")
		flPublishAll      = cmd.Bool([]string{"P", "-publish-all"}, false, "Publish all exposed ports to the host interfaces")
		flStdin           = cmd.Bool([]string{"i", "-interactive"}, false, "Keep stdin open even if not attached")
		flTty             = cmd.Bool([]string{"t", "-tty"}, false, "Allocate a pseudo-tty")
		flContainerIDFile = cmd.String([]string{"#cidfile", "-cidfile"}, "", "Write the container ID to the file")
		flEntrypoint      = cmd.String([]string{"#entrypoint", "-entrypoint"}, "", "Overwrite the default entrypoint of the image")
		flHostname        = cmd.String([]string{"h", "-hostname"}, "", "Container host name")
		flMemoryString    = cmd.String([]string{"m", "-memory"}, "", "Memory limit (format: <number><optional unit>, where unit = b, k, m or g)")
		flUser            = cmd.String([]string{"u", "-user"}, "", "Username or UID")
		flWorkingDir      = cmd.String([]string{"w", "-workdir"}, "", "Working directory inside the container")
		flCpuShares       = cmd.Int64([]string{"c", "-cpu-shares"}, 0, "CPU shares (relative weight)")

		// For documentation purpose
		_ = cmd.Bool([]string{"#sig-proxy", "-sig-proxy"}, true, "Proxify all received signal to the process (even in non-tty mode)")
		_ = cmd.String([]string{"#name", "-name"}, "", "Assign a name to the container")
	)

	cmd.Var(&flAttach, []string{"a", "-attach"}, "Attach to stdin, stdout or stderr.")
	cmd.Var(&flVolumes, []string{"v", "-volume"}, "Bind mount a volume (e.g. from the host: -v /host:/container, from docker: -v /container)")
	cmd.Var(&flLinks, []string{"#link", "-link"}, "Add link to another container (name:alias)")
	cmd.Var(&flEnv, []string{"e", "-env"}, "Set environment variables")

	cmd.Var(&flPublish, []string{"p", "-publish"}, fmt.Sprintf("Publish a container's port to the host (format: %s) (use 'docker port' to see the actual mapping)", nat.PortSpecTemplateFormat))
	cmd.Var(&flExpose, []string{"#expose", "-expose"}, "Expose a port from the container without publishing it to your host")
	cmd.Var(&flDns, []string{"#dns", "-dns"}, "Set custom dns servers")
	cmd.Var(&flVolumesFrom, []string{"#volumes-from", "-volumes-from"}, "Mount volumes from the specified container(s)")
	cmd.Var(&flLxcOpts, []string{"#lxc-conf", "-lxc-conf"}, "Add custom lxc options -lxc-conf=\"lxc.cgroup.cpuset.cpus = 0,1\"")

	if err := cmd.Parse(args); err != nil {
		return nil, nil, cmd, err
	}

	// Check if the kernel supports memory limit cgroup.
	if sysInfo != nil && *flMemoryString != "" && !sysInfo.MemoryLimit {
		*flMemoryString = ""
	}

	// Validate input params
	if *flDetach && flAttach.Len() > 0 {
		return nil, nil, cmd, ErrConflictAttachDetach
	}
	if *flWorkingDir != "" && !path.IsAbs(*flWorkingDir) {
		return nil, nil, cmd, ErrInvalidWorikingDirectory
	}
	if *flDetach && *flAutoRemove {
		return nil, nil, cmd, ErrConflictDetachAutoRemove
	}

	// If neither -d or -a are set, attach to everything by default
	if flAttach.Len() == 0 && !*flDetach {
		if !*flDetach {
			flAttach.Set("stdout")
			flAttach.Set("stderr")
			if *flStdin {
				flAttach.Set("stdin")
			}
		}
	}

	var flMemory int64
	if *flMemoryString != "" {
		parsedMemory, err := utils.RAMInBytes(*flMemoryString)
		if err != nil {
			return nil, nil, cmd, err
		}
		flMemory = parsedMemory
	}

	var binds []string
	// add any bind targets to the list of container volumes
	for bind := range flVolumes.GetMap() {
		if arr := strings.Split(bind, ":"); len(arr) > 1 {
			if arr[0] == "/" {
				return nil, nil, cmd, fmt.Errorf("Invalid bind mount: source can't be '/'")
			}
			dstDir := arr[1]
			flVolumes.Set(dstDir)
			binds = append(binds, bind)
			flVolumes.Delete(bind)
		} else if bind == "/" {
			return nil, nil, cmd, fmt.Errorf("Invalid volume: path can't be '/'")
		}
	}

	var (
		parsedArgs = cmd.Args()
		runCmd     []string
		entrypoint []string
		image      string
	)
	if len(parsedArgs) >= 1 {
		image = cmd.Arg(0)
	}
	if len(parsedArgs) > 1 {
		runCmd = parsedArgs[1:]
	}
	if *flEntrypoint != "" {
		entrypoint = []string{*flEntrypoint}
	}

	lxcConf, err := parseLxcConfOpts(flLxcOpts)
	if err != nil {
		return nil, nil, cmd, err
	}

	var (
		domainname string
		hostname   = *flHostname
		parts      = strings.SplitN(hostname, ".", 2)
	)
	if len(parts) > 1 {
		hostname = parts[0]
		domainname = parts[1]
	}

	ports, portBindings, err := nat.ParsePortSpecs(flPublish.GetAll())
	if err != nil {
		return nil, nil, cmd, err
	}

	// Merge in exposed ports to the map of published ports
	for _, e := range flExpose.GetAll() {
		if strings.Contains(e, ":") {
			return nil, nil, cmd, fmt.Errorf("Invalid port format for --expose: %s", e)
		}
		p := nat.NewPort(nat.SplitProtoPort(e))
		if _, exists := ports[p]; !exists {
			ports[p] = struct{}{}
		}
	}

	config := &Config{
		Hostname:        hostname,
		Domainname:      domainname,
		PortSpecs:       nil, // Deprecated
		ExposedPorts:    ports,
		User:            *flUser,
		Tty:             *flTty,
		NetworkDisabled: !*flNetwork,
		OpenStdin:       *flStdin,
		Memory:          flMemory,
		CpuShares:       *flCpuShares,
		AttachStdin:     flAttach.Get("stdin"),
		AttachStdout:    flAttach.Get("stdout"),
		AttachStderr:    flAttach.Get("stderr"),
		Env:             flEnv.GetAll(),
		Cmd:             runCmd,
		Dns:             flDns.GetAll(),
		Image:           image,
		Volumes:         flVolumes.GetMap(),
		VolumesFrom:     strings.Join(flVolumesFrom.GetAll(), ","),
		Entrypoint:      entrypoint,
		WorkingDir:      *flWorkingDir,
	}

	hostConfig := &HostConfig{
		Binds:           binds,
		ContainerIDFile: *flContainerIDFile,
		LxcConf:         lxcConf,
		Privileged:      *flPrivileged,
		PortBindings:    portBindings,
		Links:           flLinks.GetAll(),
		PublishAllPorts: *flPublishAll,
	}

	if sysInfo != nil && flMemory > 0 && !sysInfo.SwapLimit {
		//fmt.Fprintf(stdout, "WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.\n")
		config.MemorySwap = -1
	}

	// When allocating stdin in attached mode, close stdin at client disconnect
	if config.OpenStdin && config.AttachStdin {
		config.StdinOnce = true
	}
	return config, hostConfig, cmd, nil
}
Example #3
0
func ParseRun(args []string, capabilities *Capabilities) (*Config, *HostConfig, *flag.FlagSet, error) {
	cmd := Subcmd("run", "[OPTIONS] IMAGE [COMMAND] [ARG...]", "Run a command in a new container")
	if os.Getenv("TEST") != "" {
		cmd.SetOutput(ioutil.Discard)
		cmd.Usage = nil
	}

	flHostname := cmd.String("h", "", "Container host name")
	flWorkingDir := cmd.String("w", "", "Working directory inside the container")
	flUser := cmd.String("u", "", "Username or UID")
	flDetach := cmd.Bool("d", false, "Detached mode: Run container in the background, print new container id")
	flAttach := NewAttachOpts()
	cmd.Var(flAttach, "a", "Attach to stdin, stdout or stderr.")
	flStdin := cmd.Bool("i", false, "Keep stdin open even if not attached")
	flTty := cmd.Bool("t", false, "Allocate a pseudo-tty")
	flMemoryString := cmd.String("m", "", "Memory limit (format: <number><optional unit>, where unit = b, k, m or g)")
	flContainerIDFile := cmd.String("cidfile", "", "Write the container ID to the file")
	flNetwork := cmd.Bool("n", true, "Enable networking for this container")
	flPrivileged := cmd.Bool("privileged", false, "Give extended privileges to this container")
	flAutoRemove := cmd.Bool("rm", false, "Automatically remove the container when it exits (incompatible with -d)")
	cmd.Bool("sig-proxy", true, "Proxify all received signal to the process (even in non-tty mode)")
	cmd.String("name", "", "Assign a name to the container")
	flPublishAll := cmd.Bool("P", false, "Publish all exposed ports to the host interfaces")

	if capabilities != nil && *flMemoryString != "" && !capabilities.MemoryLimit {
		//fmt.Fprintf(stdout, "WARNING: Your kernel does not support memory limit capabilities. Limitation discarded.\n")
		*flMemoryString = ""
	}

	flCpuShares := cmd.Int64("c", 0, "CPU shares (relative weight)")

	var flPublish utils.ListOpts
	cmd.Var(&flPublish, "p", "Publish a container's port to the host (use 'docker port' to see the actual mapping)")

	var flExpose utils.ListOpts
	cmd.Var(&flExpose, "expose", "Expose a port from the container without publishing it to your host")

	var flEnv utils.ListOpts
	cmd.Var(&flEnv, "e", "Set environment variables")

	var flDns utils.ListOpts
	cmd.Var(&flDns, "dns", "Set custom dns servers")

	flVolumes := NewPathOpts()
	cmd.Var(flVolumes, "v", "Bind mount a volume (e.g. from the host: -v /host:/container, from docker: -v /container)")

	var flVolumesFrom utils.ListOpts
	cmd.Var(&flVolumesFrom, "volumes-from", "Mount volumes from the specified container(s)")

	flEntrypoint := cmd.String("entrypoint", "", "Overwrite the default entrypoint of the image")

	var flLxcOpts utils.ListOpts
	cmd.Var(&flLxcOpts, "lxc-conf", "Add custom lxc options -lxc-conf=\"lxc.cgroup.cpuset.cpus = 0,1\"")

	var flLinks utils.ListOpts
	cmd.Var(&flLinks, "link", "Add link to another container (name:alias)")

	if err := cmd.Parse(args); err != nil {
		return nil, nil, cmd, err
	}
	if *flDetach && len(flAttach) > 0 {
		return nil, nil, cmd, ErrConflictAttachDetach
	}
	if *flWorkingDir != "" && !path.IsAbs(*flWorkingDir) {
		return nil, nil, cmd, ErrInvalidWorikingDirectory
	}
	if *flDetach && *flAutoRemove {
		return nil, nil, cmd, ErrConflictDetachAutoRemove
	}

	// If neither -d or -a are set, attach to everything by default
	if len(flAttach) == 0 && !*flDetach {
		if !*flDetach {
			flAttach.Set("stdout")
			flAttach.Set("stderr")
			if *flStdin {
				flAttach.Set("stdin")
			}
		}
	}

	envs := []string{}

	for _, env := range flEnv {
		arr := strings.Split(env, "=")
		if len(arr) > 1 {
			envs = append(envs, env)
		} else {
			v := os.Getenv(env)
			envs = append(envs, env+"="+v)
		}
	}

	var flMemory int64

	if *flMemoryString != "" {
		parsedMemory, err := utils.RAMInBytes(*flMemoryString)

		if err != nil {
			return nil, nil, cmd, err
		}

		flMemory = parsedMemory
	}

	var binds []string

	// add any bind targets to the list of container volumes
	for bind := range flVolumes {
		arr := strings.Split(bind, ":")
		if len(arr) > 1 {
			if arr[0] == "/" {
				return nil, nil, cmd, fmt.Errorf("Invalid bind mount: source can't be '/'")
			}
			dstDir := arr[1]
			flVolumes[dstDir] = struct{}{}
			binds = append(binds, bind)
			delete(flVolumes, bind)
		}
	}

	parsedArgs := cmd.Args()
	runCmd := []string{}
	entrypoint := []string{}
	image := ""
	if len(parsedArgs) >= 1 {
		image = cmd.Arg(0)
	}
	if len(parsedArgs) > 1 {
		runCmd = parsedArgs[1:]
	}
	if *flEntrypoint != "" {
		entrypoint = []string{*flEntrypoint}
	}

	var lxcConf []KeyValuePair
	lxcConf, err := parseLxcConfOpts(flLxcOpts)
	if err != nil {
		return nil, nil, cmd, err
	}

	hostname := *flHostname
	domainname := ""

	parts := strings.SplitN(hostname, ".", 2)
	if len(parts) > 1 {
		hostname = parts[0]
		domainname = parts[1]
	}

	ports, portBindings, err := parsePortSpecs(flPublish)
	if err != nil {
		return nil, nil, cmd, err
	}

	// Merge in exposed ports to the map of published ports
	for _, e := range flExpose {
		if strings.Contains(e, ":") {
			return nil, nil, cmd, fmt.Errorf("Invalid port format for -expose: %s", e)
		}
		p := NewPort(splitProtoPort(e))
		if _, exists := ports[p]; !exists {
			ports[p] = struct{}{}
		}
	}

	config := &Config{
		Hostname:        hostname,
		Domainname:      domainname,
		PortSpecs:       nil, // Deprecated
		ExposedPorts:    ports,
		User:            *flUser,
		Tty:             *flTty,
		NetworkDisabled: !*flNetwork,
		OpenStdin:       *flStdin,
		Memory:          flMemory,
		CpuShares:       *flCpuShares,
		AttachStdin:     flAttach.Get("stdin"),
		AttachStdout:    flAttach.Get("stdout"),
		AttachStderr:    flAttach.Get("stderr"),
		Env:             envs,
		Cmd:             runCmd,
		Dns:             flDns,
		Image:           image,
		Volumes:         flVolumes,
		VolumesFrom:     strings.Join(flVolumesFrom, ","),
		Entrypoint:      entrypoint,
		WorkingDir:      *flWorkingDir,
	}

	hostConfig := &HostConfig{
		Binds:           binds,
		ContainerIDFile: *flContainerIDFile,
		LxcConf:         lxcConf,
		Privileged:      *flPrivileged,
		PortBindings:    portBindings,
		Links:           flLinks,
		PublishAllPorts: *flPublishAll,
	}

	if capabilities != nil && flMemory > 0 && !capabilities.SwapLimit {
		//fmt.Fprintf(stdout, "WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.\n")
		config.MemorySwap = -1
	}

	// When allocating stdin in attached mode, close stdin at client disconnect
	if config.OpenStdin && config.AttachStdin {
		config.StdinOnce = true
	}
	return config, hostConfig, cmd, nil
}