label

Documentation

Index

• Constants
• func AppendLabelsHandlerWrapper(ref string) func(f images.Handler) images.Handler

Constants

const (
	CRIImageRef       = "containerd.io/snapshot/cri.image-ref"
	CRIImageLayers    = "containerd.io/snapshot/cri.image-layers"
	CRILayerDigest    = "containerd.io/snapshot/cri.layer-digest"
	CRIManifestDigest = "containerd.io/snapshot/cri.manifest-digest"

	// Marker for remote snapshotter to handle the pull request.
	// During image pull, the containerd client calls Prepare API with the label containerd.io/snapshot.ref.
	// This is a containerd-defined label which contains ChainID that targets a committed snapshot that the
	// client is trying to prepare.
	TargetSnapshotRef = "containerd.io/snapshot.ref"

	// A bool flag to mark the blob as a Nydus data blob, set by image builders.
	NydusDataLayer = "containerd.io/snapshot/nydus-blob"
	// A bool flag to mark the blob as a nydus bootstrap, set by image builders.
	NydusMetaLayer = "containerd.io/snapshot/nydus-bootstrap"
	// A bool flag to mark the blob as a nydus ref metadata, set by image builders.
	NydusRefLayer = "containerd.io/snapshot/nydus-ref"
	// Annotation containing secret to pull images from registry, set by the snapshotter.
	NydusImagePullSecret = "containerd.io/snapshot/pullsecret"
	// Annotation containing username to pull images from registry, set by the snapshotter.
	NydusImagePullUsername = "containerd.io/snapshot/pullusername"
	// A bool flag to enable integrity verification of meta data blob
	NydusSignature = "containerd.io/snapshot/nydus-signature"

	// A bool flag to mark the blob as a estargz data blob, set by the snapshotter.
	StargzLayer = "containerd.io/snapshot/stargz"

	// volatileOpt is a key of an optional label to each snapshot.
	// If this optional label of a snapshot is specified, when mounted to rootdir
	// this snapshot will include volatile option
	OverlayfsVolatileOpt = "containerd.io/snapshot/overlay.volatile"
)

Functions

func AppendLabelsHandlerWrapper

func AppendLabelsHandlerWrapper(ref string) func(f images.Handler) images.Handler

AppendLabelsHandlerWrapper returns a function which can wrap a handler by appending image's basic information to each layer descriptor as annotations during unpack. These annotations will be passed to this nydus snapshotter as labels.