Esempio n. 1
0
func CheckPodsExceedingCapacity(pods []*api.Pod, capacity api.ResourceList) (fitting []*api.Pod, notFitting []*api.Pod) {
	totalMilliCPU := capacity.Cpu().MilliValue()
	totalMemory := capacity.Memory().Value()
	milliCPURequested := int64(0)
	memoryRequested := int64(0)
	for _, pod := range pods {
		podRequest := getResourceRequest(pod)
		fitsCPU := totalMilliCPU == 0 || (totalMilliCPU-milliCPURequested) >= podRequest.milliCPU
		fitsMemory := totalMemory == 0 || (totalMemory-memoryRequested) >= podRequest.memory
		if !fitsCPU || !fitsMemory {
			// the pod doesn't fit
			notFitting = append(notFitting, pod)
			continue
		}
		// the pod fits
		milliCPURequested += podRequest.milliCPU
		memoryRequested += podRequest.memory
		fitting = append(fitting, pod)
	}
	return
}
// TODO(vmarmol): Add limits to the system containers.
// Takes the absolute name of the specified containers.
// Empty container name disables use of the specified container.
func newContainerManager(cadvisorInterface cadvisor.Interface, dockerDaemonContainerName, systemContainerName, qingletContainerName string) (containerManager, error) {
	systemContainers := []*systemContainer{}

	if dockerDaemonContainerName != "" {
		cont := newSystemContainer(dockerDaemonContainerName)

		info, err := cadvisorInterface.MachineInfo()
		var capacity = api.ResourceList{}
		if err != nil {
		} else {
			capacity = CapacityFromMachineInfo(info)
		}
		memoryLimit := (int64(capacity.Memory().Value() * DockerMemoryLimitThresholdPercent / 100))
		if memoryLimit < MinDockerMemoryLimit {
			glog.Warningf("Memory limit %d for container %s is too small, reset it to %d", memoryLimit, dockerDaemonContainerName, MinDockerMemoryLimit)
			memoryLimit = MinDockerMemoryLimit
		}

		glog.V(2).Infof("Configure resource-only container %s with memory limit: %d", dockerDaemonContainerName, memoryLimit)

		dockerContainer := &fs.Manager{
			Cgroups: &configs.Cgroup{
				Name:            dockerDaemonContainerName,
				Memory:          memoryLimit,
				MemorySwap:      -1,
				AllowAllDevices: true,
			},
		}
		cont.ensureStateFunc = func(manager *fs.Manager) error {
			return ensureDockerInContainer(cadvisorInterface, -900, dockerContainer)
		}
		systemContainers = append(systemContainers, cont)
	}

	if systemContainerName != "" {
		if systemContainerName == "/" {
			return nil, fmt.Errorf("system container cannot be root (\"/\")")
		}

		rootContainer := &fs.Manager{
			Cgroups: &configs.Cgroup{
				Name: "/",
			},
		}
		manager := createManager(systemContainerName)

		err := ensureSystemContainer(rootContainer, manager)
		if err != nil {
			return nil, err
		}
		systemContainers = append(systemContainers, newSystemContainer(systemContainerName))
	}

	if qingletContainerName != "" {
		systemContainers = append(systemContainers, newSystemContainer(qingletContainerName))
	}

	// TODO(vmarmol): Add Qing-proxy container.

	return &containerManagerImpl{
		systemContainers: systemContainers,
	}, nil
}