Documentation
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Overview ¶
Package images is responsible for managing lifecycle of container images.
Index ¶
Constants ¶
This section is empty.
Variables ¶
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var ( // Container image pull failed, kubelet is backing off image pull ErrImagePullBackOff = errors.New("ImagePullBackOff") // Unable to inspect image ErrImageInspect = errors.New("ImageInspectError") // General image pull error ErrImagePull = errors.New("ErrImagePull") // Required Image is absent on host and PullPolicy is NeverPullImage ErrImageNeverPull = errors.New("ErrImageNeverPull") RegistryUnavailable = errors.New("RegistryUnavailable") // Unable to parse the image name. ErrInvalidImageName = errors.New("InvalidImageName") )
Functions ¶
This section is empty.
Types ¶
type ImageGCManager ¶
type ImageGCManager interface { // Applies the garbage collection policy. Errors include being unable to free // enough space as per the garbage collection policy. GarbageCollect() error // Start async garbage collection of images. Start() GetImageList() ([]container.Image, error) // Delete all unused images and returns the number of bytes freed. The number of bytes freed is always returned. DeleteUnusedImages() (int64, error) }
Manages lifecycle of all images.
Implementation is thread-safe.
func NewImageGCManager ¶
func NewImageGCManager(runtime container.Runtime, statsProvider StatsProvider, recorder record.EventRecorder, nodeRef *v1.ObjectReference, policy ImageGCPolicy, sandboxImage string) (ImageGCManager, error)
type ImageGCPolicy ¶
type ImageGCPolicy struct { // Any usage above this threshold will always trigger garbage collection. // This is the highest usage we will allow. HighThresholdPercent int // Any usage below this threshold will never trigger garbage collection. // This is the lowest threshold we will try to garbage collect to. LowThresholdPercent int // Minimum age at which an image can be garbage collected. MinAge time.Duration }
A policy for garbage collecting images. Policy defines an allowed band in which garbage collection will be run.
type ImageManager ¶
type ImageManager interface { // EnsureImageExists ensures that image specified in `container` exists. EnsureImageExists(pod *v1.Pod, container *v1.Container, pullSecrets []v1.Secret) (string, string, error) }
ImageManager provides an interface to manage the lifecycle of images. Implementations of this interface are expected to deal with pulling (downloading), managing, and deleting container images. Implementations are expected to abstract the underlying runtimes. Implementations are expected to be thread safe.
func NewImageManager ¶
func NewImageManager(recorder record.EventRecorder, imageService kubecontainer.ImageService, imageBackOff *flowcontrol.Backoff, serialized bool, qps float32, burst int) ImageManager
type StatsProvider ¶ added in v1.8.3
type StatsProvider interface { // ImageFsStats returns the stats of the image filesystem. ImageFsStats() (*statsapi.FsStats, error) }
StatsProvider is an interface for fetching stats used during image garbage collection.
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