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Promote Local storage capacity isolation feature to GA

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This change is to promote local storage capacity isolation feature to GA

At the same time, to allow rootless system disable this feature due to
unable to get root fs, this change introduced a new kubelet config
"localStorageCapacityIsolation". By default it is set to true. For
rootless systems, they can set this configuration to false to disable
the feature. Once it is set, user cannot set ephemeral-storage
request/limit because capacity and allocatable will not be set.

Change-Id: I48a52e737c6a09e9131454db6ad31247b56c000a
This commit is contained in:
jinxu
2022-07-28 08:03:20 -07:00
parent bc4c4930ff
commit 0064010cdd
42 changed files with 267 additions and 383 deletions
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9
pkg/kubelet/cm/container_manager_linux.go
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@@ -554,7 +554,8 @@ func (cm *containerManagerImpl) Start(node *v1.Node,
activePods ActivePodsFunc,
sourcesReady config.SourcesReady,
podStatusProvider status.PodStatusProvider,
runtimeService internalapi.RuntimeService) error {
runtimeService internalapi.RuntimeService,
localStorageCapacityIsolation bool) error {
// Initialize CPU manager
if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.CPUManager) {
@@ -578,7 +579,7 @@ func (cm *containerManagerImpl) Start(node *v1.Node,
// allocatable of the node
cm.nodeInfo = node
if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.LocalStorageCapacityIsolation) {
if localStorageCapacityIsolation {
rootfs, err := cm.cadvisorInterface.RootFsInfo()
if err != nil {
return fmt.Errorf("failed to get rootfs info: %v", err)
@@ -915,8 +916,8 @@ func isKernelPid(pid int) bool {
// GetCapacity returns node capacity data for "cpu", "memory", "ephemeral-storage", and "huge-pages*"
// At present this method is only invoked when introspecting ephemeral storage
func (cm *containerManagerImpl) GetCapacity() v1.ResourceList {
if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.LocalStorageCapacityIsolation) {
func (cm *containerManagerImpl) GetCapacity(localStorageCapacityIsolation bool) v1.ResourceList {
if localStorageCapacityIsolation {
// We store allocatable ephemeral-storage in the capacity property once we Start() the container manager
if _, ok := cm.capacity[v1.ResourceEphemeralStorage]; !ok {
// If we haven't yet stored the capacity for ephemeral-storage, we can try to fetch it directly from cAdvisor,