Esempio n. 1
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// 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)
	// NOTE: We do not enforce a minimum value for swap limits for zones on Solaris and
	// therefore we will not do that for Docker container either.
	if hostConfig.Memory > 0 && !sysInfo.MemoryLimit {
		warnings = append(warnings, "Your kernel does not support memory limit capabilities. Limitation discarded.")
		logrus.Warnf("Your kernel does not support memory limit capabilities. Limitation discarded.")
		hostConfig.Memory = 0
		hostConfig.MemorySwap = -1
	}
	if hostConfig.Memory > 0 && hostConfig.MemorySwap != -1 && !sysInfo.SwapLimit {
		warnings = append(warnings, "Your kernel does not support swap limit capabilities, memory limited without swap.")
		logrus.Warnf("Your kernel does not support swap limit capabilities, memory limited without swap.")
		hostConfig.MemorySwap = -1
	}
	if hostConfig.Memory > 0 && hostConfig.MemorySwap > 0 && hostConfig.MemorySwap < hostConfig.Memory {
		return warnings, fmt.Errorf("Minimum memoryswap limit should be larger than memory limit, see usage.")
	}
	// Solaris NOTE: We allow and encourage setting the swap without setting the memory limit.

	if hostConfig.MemorySwappiness != nil && *hostConfig.MemorySwappiness != -1 && !sysInfo.MemorySwappiness {
		warnings = append(warnings, "Your kernel does not support memory swappiness capabilities, memory swappiness discarded.")
		logrus.Warnf("Your kernel does not support memory swappiness capabilities, memory swappiness discarded.")
		hostConfig.MemorySwappiness = nil
	}
	if hostConfig.MemoryReservation > 0 && !sysInfo.MemoryReservation {
		warnings = append(warnings, "Your kernel does not support memory soft limit capabilities. Limitation discarded.")
		logrus.Warnf("Your kernel does not support memory soft limit capabilities. Limitation discarded.")
		hostConfig.MemoryReservation = 0
	}
	if hostConfig.Memory > 0 && hostConfig.MemoryReservation > 0 && hostConfig.Memory < hostConfig.MemoryReservation {
		return warnings, fmt.Errorf("Minimum memory limit should be larger than memory reservation limit, see usage.")
	}
	if hostConfig.KernelMemory > 0 && !sysInfo.KernelMemory {
		warnings = append(warnings, "Your kernel does not support kernel memory limit capabilities. Limitation discarded.")
		logrus.Warnf("Your kernel does not support kernel memory limit capabilities. Limitation discarded.")
		hostConfig.KernelMemory = 0
	}
	if hostConfig.CPUShares != 0 && !sysInfo.CPUShares {
		warnings = append(warnings, "Your kernel does not support CPU shares. Shares discarded.")
		logrus.Warnf("Your kernel does not support CPU shares. Shares discarded.")
		hostConfig.CPUShares = 0
	}
	if hostConfig.CPUShares < 0 {
		warnings = append(warnings, "Invalid CPUShares value. Must be positive. Discarding.")
		logrus.Warnf("Invalid CPUShares value. Must be positive. Discarding.")
		hostConfig.CPUQuota = 0
	}
	if hostConfig.CPUShares > 0 && !sysinfo.IsCPUSharesAvailable() {
		warnings = append(warnings, "Global zone default scheduling class not FSS. Discarding shares.")
		logrus.Warnf("Global zone default scheduling class not FSS. Discarding shares.")
		hostConfig.CPUShares = 0
	}

	// Solaris NOTE: Linux does not do negative checking for CPUShares and Quota here. But it makes sense to.
	if hostConfig.CPUPeriod > 0 && !sysInfo.CPUCfsPeriod {
		warnings = append(warnings, "Your kernel does not support CPU cfs period. Period discarded.")
		logrus.Warnf("Your kernel does not support CPU cfs period. Period discarded.")
		if hostConfig.CPUQuota > 0 {
			warnings = append(warnings, "Quota will be applied on default period, not period specified.")
			logrus.Warnf("Quota will be applied on default period, not period specified.")
		}
		hostConfig.CPUPeriod = 0
	}
	if hostConfig.CPUQuota != 0 && !sysInfo.CPUCfsQuota {
		warnings = append(warnings, "Your kernel does not support CPU cfs quota. Quota discarded.")
		logrus.Warnf("Your kernel does not support CPU cfs quota. Quota discarded.")
		hostConfig.CPUQuota = 0
	}
	if hostConfig.CPUQuota < 0 {
		warnings = append(warnings, "Invalid CPUQuota value. Must be positive. Discarding.")
		logrus.Warnf("Invalid CPUQuota value. Must be positive. Discarding.")
		hostConfig.CPUQuota = 0
	}
	if (hostConfig.CpusetCpus != "" || hostConfig.CpusetMems != "") && !sysInfo.Cpuset {
		warnings = append(warnings, "Your kernel does not support cpuset. Cpuset discarded.")
		logrus.Warnf("Your kernel does not support cpuset. Cpuset discarded.")
		hostConfig.CpusetCpus = ""
		hostConfig.CpusetMems = ""
	}
	cpusAvailable, err := sysInfo.IsCpusetCpusAvailable(hostConfig.CpusetCpus)
	if err != nil {
		return warnings, fmt.Errorf("Invalid value %s for cpuset cpus.", hostConfig.CpusetCpus)
	}
	if !cpusAvailable {
		return warnings, fmt.Errorf("Requested CPUs are not available - requested %s, available: %s.", hostConfig.CpusetCpus, sysInfo.Cpus)
	}
	memsAvailable, err := sysInfo.IsCpusetMemsAvailable(hostConfig.CpusetMems)
	if err != nil {
		return warnings, fmt.Errorf("Invalid value %s for cpuset mems.", hostConfig.CpusetMems)
	}
	if !memsAvailable {
		return warnings, fmt.Errorf("Requested memory nodes are not available - requested %s, available: %s.", hostConfig.CpusetMems, sysInfo.Mems)
	}
	if hostConfig.BlkioWeight > 0 && !sysInfo.BlkioWeight {
		warnings = append(warnings, "Your kernel does not support Block I/O weight. Weight discarded.")
		logrus.Warnf("Your kernel does not support Block I/O weight. Weight discarded.")
		hostConfig.BlkioWeight = 0
	}
	if hostConfig.OomKillDisable != nil && !sysInfo.OomKillDisable {
		*hostConfig.OomKillDisable = false
		// Don't warn; this is the default setting but only applicable to Linux
	}

	if sysInfo.IPv4ForwardingDisabled {
		warnings = append(warnings, "IPv4 forwarding is disabled. Networking will not work.")
		logrus.Warnf("IPv4 forwarding is disabled. Networking will not work")
	}

	// Solaris NOTE: We do not allow setting Linux specific options, so check and warn for all of them.

	if hostConfig.CapAdd != nil || hostConfig.CapDrop != nil {
		warnings = append(warnings, "Adding or dropping kernel capabilities unsupported on Solaris.Discarding capabilities lists.")
		logrus.Warnf("Adding or dropping kernel capabilities unsupported on Solaris.Discarding capabilities lists.")
		hostConfig.CapAdd = nil
		hostConfig.CapDrop = nil
	}

	if hostConfig.GroupAdd != nil {
		warnings = append(warnings, "Additional groups unsupported on Solaris.Discarding groups lists.")
		logrus.Warnf("Additional groups unsupported on Solaris.Discarding groups lists.")
		hostConfig.GroupAdd = nil
	}

	if hostConfig.IpcMode != "" {
		warnings = append(warnings, "IPC namespace assignment unsupported on Solaris.Discarding IPC setting.")
		logrus.Warnf("IPC namespace assignment unsupported on Solaris.Discarding IPC setting.")
		hostConfig.IpcMode = ""
	}

	if hostConfig.PidMode != "" {
		warnings = append(warnings, "PID namespace setting  unsupported on Solaris. Running container in host PID namespace.")
		logrus.Warnf("PID namespace setting  unsupported on Solaris. Running container in host PID namespace.")
		hostConfig.PidMode = ""
	}

	if hostConfig.Privileged {
		warnings = append(warnings, "Privileged mode unsupported on Solaris. Discarding privileged mode setting.")
		logrus.Warnf("Privileged mode unsupported on Solaris. Discarding privileged mode setting.")
		hostConfig.Privileged = false
	}

	if hostConfig.UTSMode != "" {
		warnings = append(warnings, "UTS namespace assignment unsupported on Solaris.Discarding UTS setting.")
		logrus.Warnf("UTS namespace assignment unsupported on Solaris.Discarding UTS setting.")
		hostConfig.UTSMode = ""
	}

	if hostConfig.CgroupParent != "" {
		warnings = append(warnings, "Specifying Cgroup parent unsupported on Solaris. Discarding cgroup parent setting.")
		logrus.Warnf("Specifying Cgroup parent unsupported on Solaris. Discarding cgroup parent setting.")
		hostConfig.CgroupParent = ""
	}

	if hostConfig.Ulimits != nil {
		warnings = append(warnings, "Specifying ulimits unsupported on Solaris. Discarding ulimits setting.")
		logrus.Warnf("Specifying ulimits unsupported on Solaris. Discarding ulimits setting.")
		hostConfig.Ulimits = nil
	}

	return warnings, nil
}