Exemple #1
0
// verifyPlatformContainerSettings performs platform-specific validation of the
// hostconfig and config structures.
func verifyPlatformContainerSettings(daemon *Daemon, hostConfig *containertypes.HostConfig, config *containertypes.Config, update bool) ([]string, error) {
	warnings := []string{}
	sysInfo := sysinfo.New(true)

	warnings, err := daemon.verifyExperimentalContainerSettings(hostConfig, config)
	if err != nil {
		return warnings, err
	}

	w, err := verifyContainerResources(&hostConfig.Resources, sysInfo, update)

	// no matter err is nil or not, w could have data in itself.
	warnings = append(warnings, w...)

	if err != nil {
		return warnings, err
	}

	if hostConfig.ShmSize < 0 {
		return warnings, fmt.Errorf("SHM size can not be less than 0")
	}

	if hostConfig.OomScoreAdj < -1000 || hostConfig.OomScoreAdj > 1000 {
		return warnings, fmt.Errorf("Invalid value %d, range for oom score adj is [-1000, 1000]", hostConfig.OomScoreAdj)
	}

	// ip-forwarding does not affect container with '--net=host' (or '--net=none')
	if sysInfo.IPv4ForwardingDisabled && !(hostConfig.NetworkMode.IsHost() || hostConfig.NetworkMode.IsNone()) {
		warnings = append(warnings, "IPv4 forwarding is disabled. Networking will not work.")
		logrus.Warn("IPv4 forwarding is disabled. Networking will not work")
	}
	// check for various conflicting options with user namespaces
	if daemon.configStore.RemappedRoot != "" && hostConfig.UsernsMode.IsPrivate() {
		if hostConfig.Privileged {
			return warnings, fmt.Errorf("Privileged mode is incompatible with user namespaces")
		}
		if hostConfig.NetworkMode.IsHost() && !hostConfig.UsernsMode.IsHost() {
			return warnings, fmt.Errorf("Cannot share the host's network namespace when user namespaces are enabled")
		}
		if hostConfig.PidMode.IsHost() && !hostConfig.UsernsMode.IsHost() {
			return warnings, fmt.Errorf("Cannot share the host PID namespace when user namespaces are enabled")
		}
	}
	if hostConfig.CgroupParent != "" && UsingSystemd(daemon.configStore) {
		// CgroupParent for systemd cgroup should be named as "xxx.slice"
		if len(hostConfig.CgroupParent) <= 6 || !strings.HasSuffix(hostConfig.CgroupParent, ".slice") {
			return warnings, fmt.Errorf("cgroup-parent for systemd cgroup should be a valid slice named as \"xxx.slice\"")
		}
	}
	if hostConfig.Runtime == "" {
		hostConfig.Runtime = daemon.configStore.GetDefaultRuntimeName()
	}

	if rt := daemon.configStore.GetRuntime(hostConfig.Runtime); rt == nil {
		return warnings, fmt.Errorf("Unknown runtime specified %s", hostConfig.Runtime)
	}

	return warnings, nil
}