Beispiel #1
0
func setSeccomp(daemon *Daemon, rs *specs.Spec, c *container.Container) error {
	var profile *specs.Seccomp
	var err error

	if c.HostConfig.Privileged {
		return nil
	}

	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"
	}
	if c.SeccompProfile == "unconfined" {
		return nil
	}
	if c.SeccompProfile != "" {
		profile, err = seccomp.LoadProfile(c.SeccompProfile, rs)
		if err != nil {
			return err
		}
	} else {
		profile, err = seccomp.GetDefaultProfile(rs)
		if err != nil {
			return err
		}
	}

	rs.Linux.Seccomp = profile
	return nil
}
Beispiel #2
0
func parseSecurityOpt(container *container.Container, config *containertypes.HostConfig) error {
	var (
		labelOpts []string
		err       error
	)

	for _, opt := range config.SecurityOpt {
		con := strings.SplitN(opt, ":", 2)
		if len(con) == 1 {
			return fmt.Errorf("Invalid --security-opt: %q", opt)
		}
		switch con[0] {
		case "label":
			labelOpts = append(labelOpts, con[1])
		case "apparmor":
			container.AppArmorProfile = con[1]
		case "seccomp":
			container.SeccompProfile = con[1]
		default:
			return fmt.Errorf("Invalid --security-opt: %q", opt)
		}
	}

	container.ProcessLabel, container.MountLabel, err = label.InitLabels(labelOpts)
	return err
}
Beispiel #3
0
func parseSecurityOpt(container *container.Container, config *containertypes.HostConfig) error {
	var (
		labelOpts []string
		err       error
	)

	for _, opt := range config.SecurityOpt {
		if opt == "no-new-privileges" {
			container.NoNewPrivileges = true
			continue
		}

		var con []string
		if strings.Contains(opt, "=") {
			con = strings.SplitN(opt, "=", 2)
		} else if strings.Contains(opt, ":") {
			con = strings.SplitN(opt, ":", 2)
			logrus.Warn("Security options with `:` as a separator are deprecated and will be completely unsupported in 1.14, use `=` instead.")
		}

		if len(con) != 2 {
			return fmt.Errorf("invalid --security-opt 1: %q", opt)
		}

		switch con[0] {
		case "label":
			labelOpts = append(labelOpts, con[1])
		case "apparmor":
			container.AppArmorProfile = con[1]
		case "seccomp":
			container.SeccompProfile = con[1]
		default:
			return fmt.Errorf("invalid --security-opt 2: %q", opt)
		}
	}

	container.ProcessLabel, container.MountLabel, err = label.InitLabels(labelOpts)
	return err
}
func (daemon *Daemon) populateCommand(c *container.Container, env []string) error {
	var en *execdriver.Network
	if !c.Config.NetworkDisabled {
		en = &execdriver.Network{}
		if !daemon.execDriver.SupportsHooks() || c.HostConfig.NetworkMode.IsHost() {
			en.NamespacePath = c.NetworkSettings.SandboxKey
		}

		if c.HostConfig.NetworkMode.IsContainer() {
			nc, err := daemon.getNetworkedContainer(c.ID, c.HostConfig.NetworkMode.ConnectedContainer())
			if err != nil {
				return err
			}
			en.ContainerID = nc.ID
		}
	}

	ipc := &execdriver.Ipc{}
	var err error
	c.ShmPath, err = c.ShmResourcePath()
	if err != nil {
		return err
	}

	if c.HostConfig.IpcMode.IsContainer() {
		ic, err := daemon.getIpcContainer(c)
		if err != nil {
			return err
		}
		ipc.ContainerID = ic.ID
		c.ShmPath = ic.ShmPath
	} else {
		ipc.HostIpc = c.HostConfig.IpcMode.IsHost()
		if ipc.HostIpc {
			if _, err := os.Stat("/dev/shm"); err != nil {
				return fmt.Errorf("/dev/shm is not mounted, but must be for --ipc=host")
			}
			c.ShmPath = "/dev/shm"
		}
	}

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

	uts := &execdriver.UTS{
		HostUTS: c.HostConfig.UTSMode.IsHost(),
	}

	// Build lists of devices allowed and created within the container.
	var userSpecifiedDevices []*configs.Device
	for _, deviceMapping := range c.HostConfig.Devices {
		devs, err := getDevicesFromPath(deviceMapping)
		if err != nil {
			return err
		}

		userSpecifiedDevices = append(userSpecifiedDevices, devs...)
	}

	allowedDevices := mergeDevices(configs.DefaultAllowedDevices, userSpecifiedDevices)

	autoCreatedDevices := mergeDevices(configs.DefaultAutoCreatedDevices, userSpecifiedDevices)

	var rlimits []*units.Rlimit
	ulimits := c.HostConfig.Ulimits

	// Merge ulimits with daemon defaults
	ulIdx := make(map[string]*units.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
	}

	readBpsDevice, err := getBlkioReadBpsDevices(c.HostConfig)
	if err != nil {
		return err
	}

	writeBpsDevice, err := getBlkioWriteBpsDevices(c.HostConfig)
	if err != nil {
		return err
	}

	readIOpsDevice, err := getBlkioReadIOpsDevices(c.HostConfig)
	if err != nil {
		return err
	}

	writeIOpsDevice, err := getBlkioWriteIOpsDevices(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,
		BlkioThrottleReadBpsDevice:   readBpsDevice,
		BlkioThrottleWriteBpsDevice:  writeBpsDevice,
		BlkioThrottleReadIOpsDevice:  readIOpsDevice,
		BlkioThrottleWriteIOpsDevice: writeIOpsDevice,
		MemorySwappiness:             -1,
	}

	if c.HostConfig.OomKillDisable != nil {
		resources.OomKillDisable = *c.HostConfig.OomKillDisable
	}
	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 if daemon.usingSystemd() {
		defaultCgroupParent = "system.slice"
	}
	c.Command = &execdriver.Command{
		CommonCommand: execdriver.CommonCommand{
			ID:            c.ID,
			MountLabel:    c.GetMountLabel(),
			Network:       en,
			ProcessConfig: processConfig,
			ProcessLabel:  c.GetProcessLabel(),
			Rootfs:        c.BaseFS,
			Resources:     resources,
			WorkingDir:    c.Config.WorkingDir,
		},
		AllowedDevices:     allowedDevices,
		AppArmorProfile:    c.AppArmorProfile,
		AutoCreatedDevices: autoCreatedDevices,
		CapAdd:             c.HostConfig.CapAdd,
		CapDrop:            c.HostConfig.CapDrop,
		CgroupParent:       defaultCgroupParent,
		GIDMapping:         gidMap,
		GroupAdd:           c.HostConfig.GroupAdd,
		Ipc:                ipc,
		OomScoreAdj:        c.HostConfig.OomScoreAdj,
		Pid:                pid,
		ReadonlyRootfs:     c.HostConfig.ReadonlyRootfs,
		RemappedRoot:       remappedRoot,
		SeccompProfile:     c.SeccompProfile,
		UIDMapping:         uidMap,
		UTS:                uts,
	}
	if c.HostConfig.CgroupParent != "" {
		c.Command.CgroupParent = c.HostConfig.CgroupParent
	}

	return nil
}