Documentation
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Overview ¶
Package cdimage is the containerd-backed implementation of image.Store. It pulls user images via containerd, injects the hpcc pause binary as a fresh top layer, and registers the prepared variant under a synthetic "prepared.hpcc.local/img:<digest>" name.
This is the path used on Windows under hcsshim's Hyper-V isolation; the Linux raw-Firecracker driver uses image/rootfs instead.
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
func PreparedImageName ¶
PreparedImageName returns the containerd image-record name under which a prepared image (pause-binary injected) is registered for a given user-supplied image digest. Exported so the Windows runtime can resolve a prepared image by user digest without re-implementing the naming convention.
Types ¶
type PauseBinaries ¶
PauseBinaries lists the host filesystem paths of the per-platform pause binaries the worker has built (or shipped). The Store reads from these when constructing the injected layer for a prepared image.
type Store ¶
type Store struct {
Pause PauseBinaries
Client *containerd.Client
Snapshotter string
}
Store implements image.Store on top of containerd. The zero value is not valid — callers must set Client; Pause must cover every platform for which images are pulled. Snapshotter pins the containerd snapshotter that the base pull and the prepared-image unpack both flow into (empty falls back to containerd's daemon default — "overlayfs" on Linux, "windows" on Windows). Pinning matters because the worker's runtime later creates a snapshot under that same snapshotter; if the prepared image was unpacked elsewhere the runtime gets "parent snapshot ... does not exist" at container create time.
Source Files