Exemplo n.º 1
0
func CheckPodsExceedingFreeResources(pods []*api.Pod, capacity api.ResourceList) (fitting []*api.Pod, notFittingCPU, notFittingMemory []*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 {
			// the pod doesn't fit due to CPU request
			notFittingCPU = append(notFittingCPU, pod)
			continue
		}
		if !fitsMemory {
			// the pod doesn't fit due to Memory request
			notFittingMemory = append(notFittingMemory, pod)
			continue
		}
		// the pod fits
		milliCPURequested += podRequest.milliCPU
		memoryRequested += podRequest.memory
		fitting = append(fitting, pod)
	}
	return
}
Exemplo n.º 2
0
// TODO: Consider setting default as a fixed fraction of machine capacity (take "capacity api.ResourceList"
// as an additional argument here) rather than using constants
func getNonzeroRequests(requests *api.ResourceList) (int64, int64) {
	var out_millicpu, out_memory int64
	// Override if un-set, but not if explicitly set to zero
	if (*requests.Cpu() == resource.Quantity{}) {
		out_millicpu = defaultMilliCpuRequest
	} else {
		out_millicpu = requests.Cpu().MilliValue()
	}
	// Override if un-set, but not if explicitly set to zero
	if (*requests.Memory() == resource.Quantity{}) {
		out_memory = defaultMemoryRequest
	} else {
		out_memory = requests.Memory().Value()
	}
	return out_millicpu, out_memory
}
Exemplo n.º 3
0
func (cm *containerManagerImpl) setupNode() error {
	if err := validateSystemRequirements(cm.mountUtil); err != nil {
		return err
	}

	// TODO: plumb kernel tunable options into container manager, right now, we modify by default
	if err := setupKernelTunables(KernelTunableModify); err != nil {
		return err
	}

	systemContainers := []*systemContainer{}
	if cm.dockerDaemonContainerName != "" {
		cont := newSystemContainer(cm.dockerDaemonContainerName)

		info, err := cm.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, cm.dockerDaemonContainerName, MinDockerMemoryLimit)
			memoryLimit = MinDockerMemoryLimit
		}

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

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

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

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

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

	if cm.kubeletContainerName != "" {
		systemContainers = append(systemContainers, newSystemContainer(cm.kubeletContainerName))
	}
	cm.systemContainers = systemContainers
	return nil
}