moby/image/rootfs.go
Brian Goff 74da6a6363 Switch all logging to use containerd log pkg
This unifies our logging and allows us to propagate logging and trace
contexts together.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
2023-06-24 00:23:44 +00:00

54 lines
1.7 KiB
Go

package image // import "github.com/docker/docker/image"
import (
"context"
"runtime"
"github.com/containerd/containerd/log"
"github.com/docker/docker/layer"
)
// TypeLayers is used for RootFS.Type for filesystems organized into layers.
const TypeLayers = "layers"
// typeLayersWithBase is an older format used by Windows up to v1.12. We
// explicitly handle this as an error case to ensure that a daemon which still
// has an older image like this on disk can still start, even though the
// image itself is not usable. See https://github.com/docker/docker/pull/25806.
const typeLayersWithBase = "layers+base"
// RootFS describes images root filesystem
// This is currently a placeholder that only supports layers. In the future
// this can be made into an interface that supports different implementations.
type RootFS struct {
Type string `json:"type"`
DiffIDs []layer.DiffID `json:"diff_ids,omitempty"`
}
// NewRootFS returns empty RootFS struct
func NewRootFS() *RootFS {
return &RootFS{Type: TypeLayers}
}
// Append appends a new diffID to rootfs
func (r *RootFS) Append(id layer.DiffID) {
r.DiffIDs = append(r.DiffIDs, id)
}
// Clone returns a copy of the RootFS
func (r *RootFS) Clone() *RootFS {
newRoot := NewRootFS()
newRoot.Type = r.Type
newRoot.DiffIDs = make([]layer.DiffID, len(r.DiffIDs))
copy(newRoot.DiffIDs, r.DiffIDs)
return newRoot
}
// ChainID returns the ChainID for the top layer in RootFS.
func (r *RootFS) ChainID() layer.ChainID {
if runtime.GOOS == "windows" && r.Type == typeLayersWithBase {
log.G(context.TODO()).Warnf("Layer type is unsupported on this platform. DiffIDs: '%v'", r.DiffIDs)
return ""
}
return layer.CreateChainID(r.DiffIDs)
}