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
}
// 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
}
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
}