Golang ProcessConfig.SysProcAttr方法代码示例

//.........这里部分代码省略.........
	ulimits := c.hostConfig.Ulimits

	// Merge ulimits with daemon defaults
	ulIdx := make(map[string]*ulimit.Ulimit)
	for _, ul := range ulimits {
		ulIdx[ul.Name] = ul
	}
	for name, ul := range daemon.configStore.Ulimits {
		if _, exists := ulIdx[name]; !exists {
			ulimits = append(ulimits, ul)
		}
	}

	weightDevices, err := getBlkioWeightDevices(c.hostConfig)
	if err != nil {
		return err
	}

	for _, limit := range ulimits {
		rl, err := limit.GetRlimit()
		if err != nil {
			return err
		}
		rlimits = append(rlimits, rl)
	}

	resources := &execdriver.Resources{
		CommonResources: execdriver.CommonResources{
			Memory:            c.hostConfig.Memory,
			MemoryReservation: c.hostConfig.MemoryReservation,
			CPUShares:         c.hostConfig.CPUShares,
			BlkioWeight:       c.hostConfig.BlkioWeight,
		},
		MemorySwap:        c.hostConfig.MemorySwap,
		KernelMemory:      c.hostConfig.KernelMemory,
		CpusetCpus:        c.hostConfig.CpusetCpus,
		CpusetMems:        c.hostConfig.CpusetMems,
		CPUPeriod:         c.hostConfig.CPUPeriod,
		CPUQuota:          c.hostConfig.CPUQuota,
		Rlimits:           rlimits,
		BlkioWeightDevice: weightDevices,
		OomKillDisable:    c.hostConfig.OomKillDisable,
		MemorySwappiness:  -1,
	}

	if c.hostConfig.MemorySwappiness != nil {
		resources.MemorySwappiness = *c.hostConfig.MemorySwappiness
	}

	processConfig := execdriver.ProcessConfig{
		CommonProcessConfig: execdriver.CommonProcessConfig{
			Entrypoint: c.Path,
			Arguments:  c.Args,
			Tty:        c.Config.Tty,
		},
		Privileged: c.hostConfig.Privileged,
		User:       c.Config.User,
	}

	processConfig.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
	processConfig.Env = env

	remappedRoot := &execdriver.User{}
	rootUID, rootGID := daemon.GetRemappedUIDGID()
	if rootUID != 0 {
		remappedRoot.UID = rootUID
		remappedRoot.GID = rootGID
	}
	uidMap, gidMap := daemon.GetUIDGIDMaps()

	c.command = &execdriver.Command{
		CommonCommand: execdriver.CommonCommand{
			ID:            c.ID,
			InitPath:      "/.dockerinit",
			MountLabel:    c.getMountLabel(),
			Network:       en,
			ProcessConfig: processConfig,
			ProcessLabel:  c.getProcessLabel(),
			Rootfs:        c.rootfsPath(),
			Resources:     resources,
			WorkingDir:    c.Config.WorkingDir,
		},
		AllowedDevices:     allowedDevices,
		AppArmorProfile:    c.AppArmorProfile,
		AutoCreatedDevices: autoCreatedDevices,
		CapAdd:             c.hostConfig.CapAdd.Slice(),
		CapDrop:            c.hostConfig.CapDrop.Slice(),
		CgroupParent:       c.hostConfig.CgroupParent,
		GIDMapping:         gidMap,
		GroupAdd:           c.hostConfig.GroupAdd,
		Ipc:                ipc,
		Pid:                pid,
		ReadonlyRootfs:     c.hostConfig.ReadonlyRootfs,
		RemappedRoot:       remappedRoot,
		UIDMapping:         uidMap,
		UTS:                uts,
	}

	return nil
}

//.........这里部分代码省略.........
	ipc := &execdriver.Ipc{}

	if c.hostConfig.IpcMode.IsContainer() {
		ic, err := c.getIpcContainer()
		if err != nil {
			return err
		}
		ipc.ContainerID = ic.ID
	} else {
		ipc.HostIpc = c.hostConfig.IpcMode.IsHost()
	}

	pid := &execdriver.Pid{}
	pid.HostPid = c.hostConfig.PidMode.IsHost()

	// Build lists of devices allowed and created within the container.
	userSpecifiedDevices := make([]*configs.Device, len(c.hostConfig.Devices))
	for i, deviceMapping := range c.hostConfig.Devices {
		device, err := devices.DeviceFromPath(deviceMapping.PathOnHost, deviceMapping.CgroupPermissions)
		if err != nil {
			return fmt.Errorf("error gathering device information while adding custom device %q: %s", deviceMapping.PathOnHost, err)
		}
		device.Path = deviceMapping.PathInContainer
		userSpecifiedDevices[i] = device
	}
	allowedDevices := append(configs.DefaultAllowedDevices, userSpecifiedDevices...)

	autoCreatedDevices := append(configs.DefaultAutoCreatedDevices, userSpecifiedDevices...)

	// TODO: this can be removed after lxc-conf is fully deprecated
	lxcConfig, err := mergeLxcConfIntoOptions(c.hostConfig)
	if err != nil {
		return err
	}

	var rlimits []*ulimit.Rlimit
	ulimits := c.hostConfig.Ulimits

	// Merge ulimits with daemon defaults
	ulIdx := make(map[string]*ulimit.Ulimit)
	for _, ul := range ulimits {
		ulIdx[ul.Name] = ul
	}
	for name, ul := range c.daemon.config.Ulimits {
		if _, exists := ulIdx[name]; !exists {
			ulimits = append(ulimits, ul)
		}
	}

	for _, limit := range ulimits {
		rl, err := limit.GetRlimit()
		if err != nil {
			return err
		}
		rlimits = append(rlimits, rl)
	}

	resources := &execdriver.Resources{
		Memory:     c.hostConfig.Memory,
		MemorySwap: c.hostConfig.MemorySwap,
		CpuShares:  c.hostConfig.CpuShares,
		CpusetCpus: c.hostConfig.CpusetCpus,
		Rlimits:    rlimits,
	}

	processConfig := execdriver.ProcessConfig{
		Privileged: c.hostConfig.Privileged,
		Entrypoint: c.Path,
		Arguments:  c.Args,
		Tty:        c.Config.Tty,
		User:       c.Config.User,
	}

	processConfig.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
	processConfig.Env = env

	c.command = &execdriver.Command{
		ID:                 c.ID,
		Rootfs:             c.RootfsPath(),
		ReadonlyRootfs:     c.hostConfig.ReadonlyRootfs,
		InitPath:           "/.dockerinit",
		WorkingDir:         c.Config.WorkingDir,
		Network:            en,
		Ipc:                ipc,
		Pid:                pid,
		Resources:          resources,
		AllowedDevices:     allowedDevices,
		AutoCreatedDevices: autoCreatedDevices,
		CapAdd:             c.hostConfig.CapAdd,
		CapDrop:            c.hostConfig.CapDrop,
		ProcessConfig:      processConfig,
		ProcessLabel:       c.GetProcessLabel(),
		MountLabel:         c.GetMountLabel(),
		LxcConfig:          lxcConfig,
		AppArmorProfile:    c.AppArmorProfile,
		CgroupParent:       c.hostConfig.CgroupParent,
	}

	return nil
}

//.........这里部分代码省略.........
			CPUShares:         c.HostConfig.CPUShares,
			BlkioWeight:       c.HostConfig.BlkioWeight,
		},
		MemorySwap:                   c.HostConfig.MemorySwap,
		KernelMemory:                 c.HostConfig.KernelMemory,
		CpusetCpus:                   c.HostConfig.CpusetCpus,
		CpusetMems:                   c.HostConfig.CpusetMems,
		CPUPeriod:                    c.HostConfig.CPUPeriod,
		CPUQuota:                     c.HostConfig.CPUQuota,
		Rlimits:                      rlimits,
		BlkioWeightDevice:            weightDevices,
		BlkioThrottleReadBpsDevice:   readBpsDevice,
		BlkioThrottleWriteBpsDevice:  writeBpsDevice,
		BlkioThrottleReadIOpsDevice:  readIOpsDevice,
		BlkioThrottleWriteIOpsDevice: writeIOpsDevice,
		OomKillDisable:               *c.HostConfig.OomKillDisable,
		MemorySwappiness:             -1,
	}

	if c.HostConfig.MemorySwappiness != nil {
		resources.MemorySwappiness = *c.HostConfig.MemorySwappiness
	}

	processConfig := execdriver.ProcessConfig{
		CommonProcessConfig: execdriver.CommonProcessConfig{
			Entrypoint: c.Path,
			Arguments:  c.Args,
			Tty:        c.Config.Tty,
		},
		Privileged: c.HostConfig.Privileged,
		User:       c.Config.User,
	}

	processConfig.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
	processConfig.Env = env

	remappedRoot := &execdriver.User{}
	rootUID, rootGID := daemon.GetRemappedUIDGID()
	if rootUID != 0 {
		remappedRoot.UID = rootUID
		remappedRoot.GID = rootGID
	}
	uidMap, gidMap := daemon.GetUIDGIDMaps()

	if !daemon.seccompEnabled {
		if c.SeccompProfile != "" && c.SeccompProfile != "unconfined" {
			return fmt.Errorf("Seccomp is not enabled in your kernel, cannot run a custom seccomp profile.")
		}
		logrus.Warn("Seccomp is not enabled in your kernel, running container without default profile.")
		c.SeccompProfile = "unconfined"
	}

	defaultCgroupParent := "/docker"
	if daemon.configStore.CgroupParent != "" {
		defaultCgroupParent = daemon.configStore.CgroupParent
	} else {
		for _, option := range daemon.configStore.ExecOptions {
			key, val, err := parsers.ParseKeyValueOpt(option)
			if err != nil || !strings.EqualFold(key, "native.cgroupdriver") {
				continue
			}
			if val == "systemd" {
				defaultCgroupParent = "system.slice"
			}
		}
	}

func populateCommand(c *Container, env []string) error {
	en := &execdriver.Network{
		Mtu:       c.daemon.config.Mtu,
		Interface: nil,
	}

	parts := strings.SplitN(string(c.hostConfig.NetworkMode), ":", 2)
	switch parts[0] {
	case "none":
	case "host":
		en.HostNetworking = true
	case "bridge", "": // empty string to support existing containers
		if !c.Config.NetworkDisabled {
			network := c.NetworkSettings
			en.Interface = &execdriver.NetworkInterface{
				Gateway:     network.Gateway,
				Bridge:      network.Bridge,
				IPAddress:   network.IPAddress,
				IPPrefixLen: network.IPPrefixLen,
			}
		}
	case "container":
		nc, err := c.getNetworkedContainer()
		if err != nil {
			return err
		}
		en.ContainerID = nc.ID
	default:
		return fmt.Errorf("invalid network mode: %s", c.hostConfig.NetworkMode)
	}

	// Build lists of devices allowed and created within the container.
	userSpecifiedDevices := make([]*devices.Device, len(c.hostConfig.Devices))
	for i, deviceMapping := range c.hostConfig.Devices {
		device, err := devices.GetDevice(deviceMapping.PathOnHost, deviceMapping.CgroupPermissions)
		if err != nil {
			return fmt.Errorf("error gathering device information while adding custom device %q: %s", deviceMapping.PathOnHost, err)
		}
		device.Path = deviceMapping.PathInContainer
		userSpecifiedDevices[i] = device
	}
	allowedDevices := append(devices.DefaultAllowedDevices, userSpecifiedDevices...)

	autoCreatedDevices := append(devices.DefaultAutoCreatedDevices, userSpecifiedDevices...)

	// TODO: this can be removed after lxc-conf is fully deprecated
	lxcConfig := mergeLxcConfIntoOptions(c.hostConfig)

	resources := &execdriver.Resources{
		Memory:     c.Config.Memory,
		MemorySwap: c.Config.MemorySwap,
		CpuShares:  c.Config.CpuShares,
		Cpuset:     c.Config.Cpuset,
	}

	processConfig := execdriver.ProcessConfig{
		Privileged: c.hostConfig.Privileged,
		Entrypoint: c.Path,
		Arguments:  c.Args,
		Tty:        c.Config.Tty,
		User:       c.Config.User,
	}

	processConfig.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
	processConfig.Env = env

	c.command = &execdriver.Command{
		ID:                 c.ID,
		Rootfs:             c.RootfsPath(),
		InitPath:           "/.dockerinit",
		WorkingDir:         c.Config.WorkingDir,
		Network:            en,
		Resources:          resources,
		AllowedDevices:     allowedDevices,
		AutoCreatedDevices: autoCreatedDevices,
		CapAdd:             c.hostConfig.CapAdd,
		CapDrop:            c.hostConfig.CapDrop,
		ProcessConfig:      processConfig,
		ProcessLabel:       c.GetProcessLabel(),
		MountLabel:         c.GetMountLabel(),
		LxcConfig:          lxcConfig,
		AppArmorProfile:    c.AppArmorProfile,
	}

	return nil
}