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moby--moby/daemon/image_inspect.go
Daniel Nephin 016eea004b
Set a LastUpdated time in image metadata when an image tag is updated.
Signed-off-by: Daniel Nephin <dnephin@docker.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2017-06-26 12:16:26 -07:00

96 lines
2.5 KiB
Go

package daemon
import (
"runtime"
"time"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/layer"
"github.com/pkg/errors"
)
// LookupImage looks up an image by name and returns it as an ImageInspect
// structure.
func (daemon *Daemon) LookupImage(name string) (*types.ImageInspect, error) {
img, err := daemon.GetImage(name)
if err != nil {
return nil, errors.Wrapf(err, "no such image: %s", name)
}
// If the image OS isn't set, assume it's the host OS
platform := img.OS
if platform == "" {
platform = runtime.GOOS
}
refs := daemon.stores[platform].referenceStore.References(img.ID().Digest())
repoTags := []string{}
repoDigests := []string{}
for _, ref := range refs {
switch ref.(type) {
case reference.NamedTagged:
repoTags = append(repoTags, reference.FamiliarString(ref))
case reference.Canonical:
repoDigests = append(repoDigests, reference.FamiliarString(ref))
}
}
var size int64
var layerMetadata map[string]string
layerID := img.RootFS.ChainID()
if layerID != "" {
l, err := daemon.stores[platform].layerStore.Get(layerID)
if err != nil {
return nil, err
}
defer layer.ReleaseAndLog(daemon.stores[platform].layerStore, l)
size, err = l.Size()
if err != nil {
return nil, err
}
layerMetadata, err = l.Metadata()
if err != nil {
return nil, err
}
}
comment := img.Comment
if len(comment) == 0 && len(img.History) > 0 {
comment = img.History[len(img.History)-1].Comment
}
lastUpdated, err := daemon.stores[platform].imageStore.GetLastUpdated(img.ID())
if err != nil {
return nil, err
}
imageInspect := &types.ImageInspect{
ID: img.ID().String(),
RepoTags: repoTags,
RepoDigests: repoDigests,
Parent: img.Parent.String(),
Comment: comment,
Created: img.Created.Format(time.RFC3339Nano),
Container: img.Container,
ContainerConfig: &img.ContainerConfig,
DockerVersion: img.DockerVersion,
Author: img.Author,
Config: img.Config,
Architecture: img.Architecture,
Os: platform,
OsVersion: img.OSVersion,
Size: size,
VirtualSize: size, // TODO: field unused, deprecate
RootFS: rootFSToAPIType(img.RootFS),
Metadata: types.ImageMetadata{
LastTagTime: lastUpdated,
},
}
imageInspect.GraphDriver.Name = daemon.GraphDriverName(platform)
imageInspect.GraphDriver.Data = layerMetadata
return imageInspect, nil
}