kubelet

package
v1.12.1-lite3 Latest Latest
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 Go to latest Published: Oct 15, 2018 License: Apache-2.0 Imports: 121 Imported by: 0

Documentation

Overview

Package kubelet is the package that contains the libraries that drive the Kubelet binary. The kubelet is responsible for node level pod management. It runs on each worker in the cluster.

Index

Constants

View Source 
const (

	// ContainerLogsDir is the location of container logs.
	ContainerLogsDir = "/var/log/containers"

	// MaxContainerBackOff is the max backoff period, exported for the e2e test
	MaxContainerBackOff = 300 * time.Second

	// ContainerGCPeriod is the period for performing container garbage collection.
	ContainerGCPeriod = time.Minute
	// ImageGCPeriod is the period for performing image garbage collection.
	ImageGCPeriod = 5 * time.Minute
)
View Source 
const (
	// KubeMarkMasqChain is the mark-for-masquerade chain
	// TODO: clean up this logic in kube-proxy
	KubeMarkMasqChain utiliptables.Chain = "KUBE-MARK-MASQ"

	// KubeMarkDropChain is the mark-for-drop chain
	KubeMarkDropChain utiliptables.Chain = "KUBE-MARK-DROP"

	// KubePostroutingChain is kubernetes postrouting rules
	KubePostroutingChain utiliptables.Chain = "KUBE-POSTROUTING"

	// KubeFirewallChain is kubernetes firewall rules
	KubeFirewallChain utiliptables.Chain = "KUBE-FIREWALL"
)

Variables

This section is empty.

Functions

func NewInitializedVolumePluginMgr 

func NewInitializedVolumePluginMgr(
	kubelet *Kubelet,
	secretManager secret.Manager,
	configMapManager configmap.Manager,
	tokenManager *token.Manager,
	plugins []volume.VolumePlugin,
	prober volume.DynamicPluginProber) (*volume.VolumePluginMgr, error)

NewInitializedVolumePluginMgr returns a new instance of volume.VolumePluginMgr initialized with kubelets implementation of the volume.VolumeHost interface.

kubelet - used by VolumeHost methods to expose kubelet specific parameters plugins - used to initialize volumePluginMgr

Types

type Bootstrap 

type Bootstrap interface {
	GetConfiguration() kubeletconfiginternal.KubeletConfiguration
	BirthCry()
	StartGarbageCollection()
	ListenAndServe(address net.IP, port uint, tlsOptions *server.TLSOptions, auth server.AuthInterface, enableDebuggingHandlers, enableContentionProfiling bool)
	ListenAndServeReadOnly(address net.IP, port uint)
	Run(<-chan kubetypes.PodUpdate)
	RunOnce(<-chan kubetypes.PodUpdate) ([]RunPodResult, error)
}

Bootstrap is a bootstrapping interface for kubelet, targets the initialization protocol

type Builder 

type Builder func(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
	kubeDeps *Dependencies,
	crOptions *config.ContainerRuntimeOptions,
	containerRuntime string,
	runtimeCgroups string,
	hostnameOverride string,
	nodeIP string,
	providerID string,
	cloudProvider string,
	certDirectory string,
	rootDirectory string,
	registerNode bool,
	registerWithTaints []api.Taint,
	allowedUnsafeSysctls []string,
	remoteRuntimeEndpoint string,
	remoteImageEndpoint string,
	experimentalMounterPath string,
	experimentalKernelMemcgNotification bool,
	experimentalCheckNodeCapabilitiesBeforeMount bool,
	experimentalNodeAllocatableIgnoreEvictionThreshold bool,
	minimumGCAge metav1.Duration,
	maxPerPodContainerCount int32,
	maxContainerCount int32,
	masterServiceNamespace string,
	registerSchedulable bool,
	nonMasqueradeCIDR string,
	keepTerminatedPodVolumes bool,
	nodeLabels map[string]string,
	seccompProfileRoot string,
	bootstrapCheckpointPath string,
	nodeStatusMaxImages int32) (Bootstrap, error)

Builder creates and initializes a Kubelet instance

type Dependencies 

type Dependencies struct {
	Options []Option

	// Injected Dependencies
	Auth                    server.AuthInterface
	CAdvisorInterface       cadvisor.Interface
	ContainerManager        cm.ContainerManager
	EventClient             v1core.EventsGetter
	HeartbeatClient         clientset.Interface
	OnHeartbeatFailure      func()
	KubeClient              clientset.Interface
	CSIClient               csiclientset.Interface
	DynamicKubeClient       dynamic.Interface
	Mounter                 mount.Interface
	OOMAdjuster             *oom.OOMAdjuster
	OSInterface             kubecontainer.OSInterface
	PodConfig               *config.PodConfig
	Recorder                record.EventRecorder
	VolumePlugins           []volume.VolumePlugin
	DynamicPluginProber     volume.DynamicPluginProber
	TLSOptions              *server.TLSOptions
	KubeletConfigController *kubeletconfig.Controller
}

Dependencies is a bin for things we might consider "injected dependencies" -- objects constructed at runtime that are necessary for running the Kubelet. This is a temporary solution for grouping these objects while we figure out a more comprehensive dependency injection story for the Kubelet.

type KillPodOptions 

type KillPodOptions struct {
	// PodStatusFunc is the function to invoke to set pod status in response to a kill request.
	PodStatusFunc PodStatusFunc
	// PodTerminationGracePeriodSecondsOverride is optional override to use if a pod is being killed as part of kill operation.
	PodTerminationGracePeriodSecondsOverride *int64
}

KillPodOptions are options when performing a pod update whose update type is kill.

type Kubelet 

type Kubelet struct {

	// the list of handlers to call during pod sync loop.
	lifecycle.PodSyncLoopHandlers

	// the list of handlers to call during pod sync.
	lifecycle.PodSyncHandlers

	// StatsProvider provides the node and the container stats.
	*stats.StatsProvider
	// contains filtered or unexported fields
}

Kubelet is the main kubelet implementation.

func NewMainKubelet 

func NewMainKubelet(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
	kubeDeps *Dependencies,
	crOptions *config.ContainerRuntimeOptions,
	containerRuntime string,
	runtimeCgroups string,
	hostnameOverride string,
	nodeIP string,
	providerID string,
	cloudProvider string,
	certDirectory string,
	rootDirectory string,
	registerNode bool,
	registerWithTaints []api.Taint,
	allowedUnsafeSysctls []string,
	remoteRuntimeEndpoint string,
	remoteImageEndpoint string,
	experimentalMounterPath string,
	experimentalKernelMemcgNotification bool,
	experimentalCheckNodeCapabilitiesBeforeMount bool,
	experimentalNodeAllocatableIgnoreEvictionThreshold bool,
	minimumGCAge metav1.Duration,
	maxPerPodContainerCount int32,
	maxContainerCount int32,
	masterServiceNamespace string,
	registerSchedulable bool,
	nonMasqueradeCIDR string,
	keepTerminatedPodVolumes bool,
	nodeLabels map[string]string,
	seccompProfileRoot string,
	bootstrapCheckpointPath string,
	nodeStatusMaxImages int32) (*Kubelet, error)

NewMainKubelet instantiates a new Kubelet object along with all the required internal modules. No initialization of Kubelet and its modules should happen here.

func (*Kubelet) BirthCry 

func (kl *Kubelet) BirthCry()

BirthCry sends an event that the kubelet has started up.

func (*Kubelet) GeneratePodHostNameAndDomain 

func (kl *Kubelet) GeneratePodHostNameAndDomain(pod *v1.Pod) (string, string, error)

GeneratePodHostNameAndDomain creates a hostname and domain name for a pod, given that pod's spec and annotations or returns an error.

func (*Kubelet) GenerateRunContainerOptions 

func (kl *Kubelet) GenerateRunContainerOptions(pod *v1.Pod, container *v1.Container, podIP string) (*kubecontainer.RunContainerOptions, func(), error)

GenerateRunContainerOptions generates the RunContainerOptions, which can be used by the container runtime to set parameters for launching a container.

func (*Kubelet) GetActivePods 

func (kl *Kubelet) GetActivePods() []*v1.Pod

GetActivePods returns non-terminal pods

func (*Kubelet) GetAttach 

func (kl *Kubelet) GetAttach(podFullName string, podUID types.UID, containerName string, streamOpts remotecommandserver.Options) (*url.URL, error)

GetAttach gets the URL the attach will be served from, or nil if the Kubelet will serve it.

func (*Kubelet) GetCachedMachineInfo 

func (kl *Kubelet) GetCachedMachineInfo() (*cadvisorapiv1.MachineInfo, error)

GetCachedMachineInfo assumes that the machine info can't change without a reboot

func (*Kubelet) GetConfiguration 

func (kl *Kubelet) GetConfiguration() kubeletconfiginternal.KubeletConfiguration

GetConfiguration returns the KubeletConfiguration used to configure the kubelet.

func (*Kubelet) GetExec 

func (kl *Kubelet) GetExec(podFullName string, podUID types.UID, containerName string, cmd []string, streamOpts remotecommandserver.Options) (*url.URL, error)

GetExec gets the URL the exec will be served from, or nil if the Kubelet will serve it.

func (*Kubelet) GetExtraSupplementalGroupsForPod 

func (kl *Kubelet) GetExtraSupplementalGroupsForPod(pod *v1.Pod) []int64

GetExtraSupplementalGroupsForPod returns a list of the extra supplemental groups for the Pod. These extra supplemental groups come from annotations on persistent volumes that the pod depends on.

func (*Kubelet) GetHostIP 

func (kl *Kubelet) GetHostIP() (net.IP, error)

GetHostIP returns host IP or nil in case of error.

func (*Kubelet) GetHostname 

func (kl *Kubelet) GetHostname() string

GetHostname Returns the hostname as the kubelet sees it.

func (*Kubelet) GetKubeletContainerLogs 

func (kl *Kubelet) GetKubeletContainerLogs(ctx context.Context, podFullName, containerName string, logOptions *v1.PodLogOptions, stdout, stderr io.Writer) error

GetKubeletContainerLogs returns logs from the container TODO: this method is returning logs of random container attempts, when it should be returning the most recent attempt or all of them.

func (*Kubelet) GetNode 

func (kl *Kubelet) GetNode() (*v1.Node, error)

GetNode returns the node info for the configured node name of this Kubelet.

func (*Kubelet) GetNodeConfig 

func (kl *Kubelet) GetNodeConfig() cm.NodeConfig

GetNodeConfig returns the container manager node config.

func (*Kubelet) GetPodByCgroupfs 

func (kl *Kubelet) GetPodByCgroupfs(cgroupfs string) (*v1.Pod, bool)

GetPodByCgroupfs provides the pod that maps to the specified cgroup, as well as whether the pod was found.

func (*Kubelet) GetPodByFullName 

func (kl *Kubelet) GetPodByFullName(podFullName string) (*v1.Pod, bool)

GetPodByFullName gets the pod with the given 'full' name, which incorporates the namespace as well as whether the pod was found.

func (*Kubelet) GetPodByName 

func (kl *Kubelet) GetPodByName(namespace, name string) (*v1.Pod, bool)

GetPodByName provides the first pod that matches namespace and name, as well as whether the pod was found.

func (*Kubelet) GetPodCgroupParent 

func (kl *Kubelet) GetPodCgroupParent(pod *v1.Pod) string

GetPodCgroupParent gets pod cgroup parent from container manager.

func (*Kubelet) GetPodCgroupRoot 

func (kl *Kubelet) GetPodCgroupRoot() string

GetPodCgroupRoot returns the listeral cgroupfs value for the cgroup containing all pods

func (*Kubelet) GetPodDNS 

func (kl *Kubelet) GetPodDNS(pod *v1.Pod) (*runtimeapi.DNSConfig, error)

GetPodDNS returns DNS settings for the pod. This function is defined in kubecontainer.RuntimeHelper interface so we have to implement it.

func (*Kubelet) GetPodDir 

func (kl *Kubelet) GetPodDir(podUID types.UID) string

GetPodDir returns the full path to the per-pod data directory for the specified pod. This directory may not exist if the pod does not exist.

func (*Kubelet) GetPods 

func (kl *Kubelet) GetPods() []*v1.Pod

GetPods returns all pods bound to the kubelet and their spec, and the mirror pods.

func (*Kubelet) GetPortForward 

func (kl *Kubelet) GetPortForward(podName, podNamespace string, podUID types.UID, portForwardOpts portforward.V4Options) (*url.URL, error)

GetPortForward gets the URL the port-forward will be served from, or nil if the Kubelet will serve it.

func (*Kubelet) GetRunningPods 

func (kl *Kubelet) GetRunningPods() ([]*v1.Pod, error)

GetRunningPods returns all pods running on kubelet from looking at the container runtime cache. This function converts kubecontainer.Pod to v1.Pod, so only the fields that exist in both kubecontainer.Pod and v1.Pod are considered meaningful.

func (*Kubelet) GetVersionInfo 

func (kl *Kubelet) GetVersionInfo() (*cadvisorapiv1.VersionInfo, error)

GetVersionInfo returns information about the version of cAdvisor in use.

func (*Kubelet) HandlePodAdditions 

func (kl *Kubelet) HandlePodAdditions(pods []*v1.Pod)

HandlePodAdditions is the callback in SyncHandler for pods being added from a config source.

func (*Kubelet) HandlePodCleanups 

func (kl *Kubelet) HandlePodCleanups() error

HandlePodCleanups performs a series of cleanup work, including terminating pod workers, killing unwanted pods, and removing orphaned volumes/pod directories. NOTE: This function is executed by the main sync loop, so it should not contain any blocking calls.

func (*Kubelet) HandlePodReconcile 

func (kl *Kubelet) HandlePodReconcile(pods []*v1.Pod)

HandlePodReconcile is the callback in the SyncHandler interface for pods that should be reconciled.

func (*Kubelet) HandlePodRemoves 

func (kl *Kubelet) HandlePodRemoves(pods []*v1.Pod)

HandlePodRemoves is the callback in the SyncHandler interface for pods being removed from a config source.

func (*Kubelet) HandlePodSyncs 

func (kl *Kubelet) HandlePodSyncs(pods []*v1.Pod)

HandlePodSyncs is the callback in the syncHandler interface for pods that should be dispatched to pod workers for sync.

func (*Kubelet) HandlePodUpdates 

func (kl *Kubelet) HandlePodUpdates(pods []*v1.Pod)

HandlePodUpdates is the callback in the SyncHandler interface for pods being updated from a config source.

func (*Kubelet) IsPodDeleted 

func (kl *Kubelet) IsPodDeleted(uid types.UID) bool

IsPodDeleted returns true if the pod is deleted. For the pod to be deleted, either: 1. The pod object is deleted 2. The pod's status is evicted 3. The pod's deletion timestamp is set, and containers are not running

func (*Kubelet) IsPodTerminated 

func (kl *Kubelet) IsPodTerminated(uid types.UID) bool

IsPodTerminated returns trus if the pod with the provided UID is in a terminated state ("Failed" or "Succeeded") or if the pod has been deleted or removed

func (*Kubelet) LatestLoopEntryTime 

func (kl *Kubelet) LatestLoopEntryTime() time.Time

LatestLoopEntryTime returns the last time in the sync loop monitor.

func (*Kubelet) ListVolumesForPod 

func (kl *Kubelet) ListVolumesForPod(podUID types.UID) (map[string]volume.Volume, bool)

ListVolumesForPod returns a map of the mounted volumes for the given pod. The key in the map is the OuterVolumeSpecName (i.e. pod.Spec.Volumes[x].Name)

func (*Kubelet) ListenAndServe 

func (kl *Kubelet) ListenAndServe(address net.IP, port uint, tlsOptions *server.TLSOptions, auth server.AuthInterface, enableDebuggingHandlers, enableContentionProfiling bool)

ListenAndServe runs the kubelet HTTP server.

func (*Kubelet) ListenAndServeReadOnly 

func (kl *Kubelet) ListenAndServeReadOnly(address net.IP, port uint)

ListenAndServeReadOnly runs the kubelet HTTP server in read-only mode.

func (*Kubelet) PodResourcesAreReclaimed 

func (kl *Kubelet) PodResourcesAreReclaimed(pod *v1.Pod, status v1.PodStatus) bool

PodResourcesAreReclaimed returns true if all required node-level resources that a pod was consuming have been reclaimed by the kubelet. Reclaiming resources is a prerequisite to deleting a pod from the API server.

func (*Kubelet) ResyncInterval 

func (kl *Kubelet) ResyncInterval() time.Duration

ResyncInterval returns the interval used for periodic syncs.

func (*Kubelet) Run 

func (kl *Kubelet) Run(updates <-chan kubetypes.PodUpdate)

Run starts the kubelet reacting to config updates

func (*Kubelet) RunInContainer 

func (kl *Kubelet) RunInContainer(podFullName string, podUID types.UID, containerName string, cmd []string) ([]byte, error)

RunInContainer runs a command in a container, returns the combined stdout, stderr as an array of bytes

func (*Kubelet) RunOnce 

func (kl *Kubelet) RunOnce(updates <-chan kubetypes.PodUpdate) ([]RunPodResult, error)

RunOnce polls from one configuration update and run the associated pods.

func (*Kubelet) ServeLogs 

func (kl *Kubelet) ServeLogs(w http.ResponseWriter, req *http.Request)

ServeLogs returns logs of current machine.

func (*Kubelet) StartGarbageCollection 

func (kl *Kubelet) StartGarbageCollection()

StartGarbageCollection starts garbage collection threads.

type OOMWatcher 

type OOMWatcher interface {
	Start(ref *v1.ObjectReference) error
}

OOMWatcher defines the interface of OOM watchers.

func NewOOMWatcher 

func NewOOMWatcher(cadvisor cadvisor.Interface, recorder record.EventRecorder) OOMWatcher

NewOOMWatcher creates and initializes a OOMWatcher based on parameters.

type OnCompleteFunc 

type OnCompleteFunc func(err error)

OnCompleteFunc is a function that is invoked when an operation completes. If err is non-nil, the operation did not complete successfully.

type Option 

type Option func(*Kubelet)

Option is a functional option type for Kubelet

type PodStatusFunc 

type PodStatusFunc func(pod *v1.Pod, podStatus *kubecontainer.PodStatus) v1.PodStatus

PodStatusFunc is a function that is invoked to generate a pod status.

type PodWorkers 

type PodWorkers interface {
	UpdatePod(options *UpdatePodOptions)
	ForgetNonExistingPodWorkers(desiredPods map[types.UID]empty)
	ForgetWorker(uid types.UID)
}

PodWorkers is an abstract interface for testability.

type ReasonCache 

type ReasonCache struct {
	// contains filtered or unexported fields
}

ReasonCache stores the failure reason of the latest container start in a string, keyed by <pod_UID>_<container_name>. The goal is to propagate this reason to the container status. This endeavor is "best-effort" for two reasons:

  1. The cache is not persisted.
  2. We use an LRU cache to avoid extra garbage collection work. This means that some entries may be recycled before a pod has been deleted.

TODO(random-liu): Use more reliable cache which could collect garbage of failed pod. TODO(random-liu): Move reason cache to somewhere better.

func NewReasonCache 

func NewReasonCache() *ReasonCache

NewReasonCache creates an instance of 'ReasonCache'.

func (*ReasonCache) Get 

func (c *ReasonCache) Get(uid types.UID, name string) (*reasonItem, bool)

Get gets error reason from the cache. The return values are error reason, error message and whether an error reason is found in the cache. If no error reason is found, empty string will be returned for error reason and error message.

func (*ReasonCache) Remove 

func (c *ReasonCache) Remove(uid types.UID, name string)

Remove removes error reason from the cache

func (*ReasonCache) Update 

func (c *ReasonCache) Update(uid types.UID, result kubecontainer.PodSyncResult)

Update updates the reason cache with the SyncPodResult. Only SyncResult with StartContainer action will change the cache.

type RunPodResult 

type RunPodResult struct {
	Pod *v1.Pod
	Err error
}

RunPodResult defines the running results of a Pod.

type SyncHandler 

type SyncHandler interface {
	HandlePodAdditions(pods []*v1.Pod)
	HandlePodUpdates(pods []*v1.Pod)
	HandlePodRemoves(pods []*v1.Pod)
	HandlePodReconcile(pods []*v1.Pod)
	HandlePodSyncs(pods []*v1.Pod)
	HandlePodCleanups() error
}

SyncHandler is an interface implemented by Kubelet, for testability

type UpdatePodOptions 

type UpdatePodOptions struct {
	// pod to update
	Pod *v1.Pod
	// the mirror pod for the pod to update, if it is a static pod
	MirrorPod *v1.Pod
	// the type of update (create, update, sync, kill)
	UpdateType kubetypes.SyncPodType
	// optional callback function when operation completes
	// this callback is not guaranteed to be completed since a pod worker may
	// drop update requests if it was fulfilling a previous request.  this is
	// only guaranteed to be invoked in response to a kill pod request which is
	// always delivered.
	OnCompleteFunc OnCompleteFunc
	// if update type is kill, use the specified options to kill the pod.
	KillPodOptions *KillPodOptions
}

UpdatePodOptions is an options struct to pass to a UpdatePod operation.

Source Files

View all Source files

Directories

Path Synopsis
config
config/fuzzer
config/scheme
config/v1beta1
config/validation
cri
cri/runtime/v1alpha2
Package v1alpha2 is a generated protocol buffer package.
 Package v1alpha2 is a generated protocol buffer package.
cri/testing
stats/v1alpha1
Kubelet interactions with cAdvisor.
 Kubelet interactions with cAdvisor.
testing
cm
cpuset
util
Reads the pod configuration from the Kubernetes apiserver.
 Reads the pod configuration from the Kubernetes apiserver.
testing
Code generated by mockery v1.0.0
 Code generated by mockery v1.0.0
Package envvars is the package that build the environment variables that kubernetes provides to the containers run by it.
 Package envvars is the package that build the environment variables that kubernetes provides to the containers run by it.
Package eviction is responsible for enforcing eviction thresholds to maintain node stability.
 Package eviction is responsible for enforcing eviction thresholds to maintain node stability.
api
Package images is responsible for managing lifecycle of container images.
 Package images is responsible for managing lifecycle of container images.
checkpoint
checkpoint/store
configfiles
status
util/codec
util/equal
util/files
util/log
util/panic
util/test
Package kuberuntime contains an implementation of kubecontainer.Runtime using the interface in pkg/kubelet/v1.
 Package kuberuntime contains an implementation of kubecontainer.Runtime using the interface in pkg/kubelet/v1.
logs
Package leaky holds bits of kubelet that should be internal but have leaked out through bad abstractions.
 Package leaky holds bits of kubelet that should be internal but have leaked out through bad abstractions.
Handlers for pod lifecycle events and interfaces to integrate with kubelet admission, synchronization, and eviction of pods.
 Handlers for pod lifecycle events and interfaces to integrate with kubelet admission, synchronization, and eviction of pods.
collectors
network
dns
Package pleg contains types and a generic implementation of the pod lifecycle event generator.
 Package pleg contains types and a generic implementation of the pod lifecycle event generator.
pod
testing
Code generated by mockery v1.0.0
 Code generated by mockery v1.0.0
results
testing
package qos contains helper functions for quality of service.
 package qos contains helper functions for quality of service.
Package remote contains gRPC implementation of internalapi.RuntimeService and internalapi.ImageManagerService.
 Package remote contains gRPC implementation of internalapi.RuntimeService and internalapi.ImageManagerService.
fake
Package fake containers a fake gRPC implementation of internalapi.RuntimeService and internalapi.ImageManagerService.
 Package fake containers a fake gRPC implementation of internalapi.RuntimeService and internalapi.ImageManagerService.
Package server contains functions related to serving Kubelet's external interface.
 Package server contains functions related to serving Kubelet's external interface.
portforward
package portforward contains server-side logic for handling port forwarding requests.
 package portforward contains server-side logic for handling port forwarding requests.
remotecommand
package remotecommand contains functions related to executing commands in and attaching to pods.
 package remotecommand contains functions related to executing commands in and attaching to pods.
stats
Package stats handles exporting Kubelet and container stats.
 Package stats handles exporting Kubelet and container stats.
stats/testing
streaming
testing
Package token implements a manager of serviceaccount tokens for pods running on the node.
 Package token implements a manager of serviceaccount tokens for pods running on the node.
Common types in the Kubelet.
 Common types in the Kubelet.
Utility functions.
 Utility functions.
cache
format
ioutils
manager
queue
sliceutils
store
Package store hosts a Store interface and its implementations.
 Package store hosts a Store interface and its implementations.
cache
Package cache implements data structures used by the kubelet volume manager to keep track of attached volumes and the pods that mounted them.
 Package cache implements data structures used by the kubelet volume manager to keep track of attached volumes and the pods that mounted them.
metrics
populator
Package populator implements interfaces that monitor and keep the states of the caches in sync with the "ground truth".
 Package populator implements interfaces that monitor and keep the states of the caches in sync with the "ground truth".
reconciler
Package reconciler implements interfaces that attempt to reconcile the desired state of the world with the actual state of the world by triggering relevant actions (attach, detach, mount, unmount).
 Package reconciler implements interfaces that attempt to reconcile the desired state of the world with the actual state of the world by triggering relevant actions (attach, detach, mount, unmount).
Package winstats provides a client to get node and pod level stats on windows
 Package winstats provides a client to get node and pod level stats on windows

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