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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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1
cmd/kubelet/app/options/options.go
View File

@@ -492,6 +492,7 @@ func AddKubeletConfigFlags(mainfs *pflag.FlagSet, c *kubeletconfig.KubeletConfig
fs.Int32Var(&c.NodeStatusMaxImages, "node-status-max-images", c.NodeStatusMaxImages, "The maximum number of images to report in Node.Status.Images. If -1 is specified, no cap will be applied.")
fs.BoolVar(&c.KernelMemcgNotification, "kernel-memcg-notification", c.KernelMemcgNotification, "If enabled, the kubelet will integrate with the kernel memcg notification to determine if memory eviction thresholds are crossed rather than polling.")
fs.BoolVar(&c.LocalStorageCapacityIsolation, "local-storage-capacity-isolation", c.LocalStorageCapacityIsolation, "If true, local ephemeral storage isolation is enabled. Otherwise, local storage isolation feature will be disabled")
// Flags intended for testing, not recommended used in production environments.
fs.Int64Var(&c.MaxOpenFiles, "max-open-files", c.MaxOpenFiles, "Number of files that can be opened by Kubelet process.")

2
cmd/kubelet/app/server.go
View File

@@ -646,7 +646,7 @@ func run(ctx context.Context, s *options.KubeletServer, kubeDeps *kubelet.Depend
if kubeDeps.CAdvisorInterface == nil {
imageFsInfoProvider := cadvisor.NewImageFsInfoProvider(s.RemoteRuntimeEndpoint)
kubeDeps.CAdvisorInterface, err = cadvisor.New(imageFsInfoProvider, s.RootDirectory, cgroupRoots, cadvisor.UsingLegacyCadvisorStats(s.RemoteRuntimeEndpoint))
kubeDeps.CAdvisorInterface, err = cadvisor.New(imageFsInfoProvider, s.RootDirectory, cgroupRoots, cadvisor.UsingLegacyCadvisorStats(s.RemoteRuntimeEndpoint), s.LocalStorageCapacityIsolation)
if err != nil {
return err
}