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Update rmi logic for canonical references

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Updates the rmi code to treat canonical references as related to tagged references from the same repository during deletion.
Canonical references with a different repository name will be treated as separate references.
Updates the remove by ID logic to still remove an image if there is a single tag reference and only canonical references to the same repository remaining.

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
This commit is contained in:
Derek McGowan 2016-06-16 16:06:47 -07:00
parent 8f9c7fab24
commit a281be1c11
1 changed files with 59 additions and 26 deletions
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61
daemon/image_delete.go
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@ -104,27 +104,34 @@ func (daemon *Daemon) ImageDelete(imageRef string, force, prune bool) ([]types.I
repoRefs = daemon.referenceStore.References(imgID)
// If this is a tag reference and all the remaining references
// to this image are digest references, delete the remaining
// references so that they don't prevent removal of the image.
// If a tag reference was removed and the only remaining
// references to the same repository are digest references,
// then clean up those digest references.
if _, isCanonical := parsedRef.(reference.Canonical); !isCanonical {
foundTagRef := false
foundRepoTagRef := false
for _, repoRef := range repoRefs {
if _, repoRefIsCanonical := repoRef.(reference.Canonical); !repoRefIsCanonical {
foundTagRef = true
if _, repoRefIsCanonical := repoRef.(reference.Canonical); !repoRefIsCanonical && parsedRef.Name() == repoRef.Name() {
foundRepoTagRef = true
break
}
}
if !foundTagRef {
if !foundRepoTagRef {
// Remove canonical references from same repository
remainingRefs := []reference.Named{}
for _, repoRef := range repoRefs {
if _, repoRefIsCanonical := repoRef.(reference.Canonical); repoRefIsCanonical && parsedRef.Name() == repoRef.Name() {
if _, err := daemon.removeImageRef(repoRef); err != nil {
return records, err
}
untaggedRecord := types.ImageDelete{Untagged: repoRef.String()}
records = append(records, untaggedRecord)
} else {
remainingRefs = append(remainingRefs, repoRef)
}
repoRefs = []reference.Named{}
}
repoRefs = remainingRefs
}
}
@ -135,11 +142,10 @@ func (daemon *Daemon) ImageDelete(imageRef string, force, prune bool) ([]types.I
removedRepositoryRef = true
} else {
// If an ID reference was given AND there is exactly one
// repository reference to the image then we will want to
// remove that reference.
// FIXME: Is this the behavior we want?
if len(repoRefs) == 1 {
// If an ID reference was given AND there is at most one tag
// reference to the image AND all references are within one
// repository, then remove all references.
if isSingleReference(repoRefs) {
c := conflictHard
if !force {
c |= conflictSoft &^ conflictActiveReference
@ -148,7 +154,8 @@ func (daemon *Daemon) ImageDelete(imageRef string, force, prune bool) ([]types.I
return nil, conflict
}
parsedRef, err := daemon.removeImageRef(repoRefs[0])
for _, repoRef := range repoRefs {
parsedRef, err := daemon.removeImageRef(repoRef)
if err != nil {
return nil, err
}
@ -159,10 +166,36 @@ func (daemon *Daemon) ImageDelete(imageRef string, force, prune bool) ([]types.I
records = append(records, untaggedRecord)
}
}
}
return records, daemon.imageDeleteHelper(imgID, &records, force, prune, removedRepositoryRef)
}
// isSingleReference returns true when all references are from one repository
// and there is at most one tag. Returns false for empty input.
func isSingleReference(repoRefs []reference.Named) bool {
if len(repoRefs) <= 1 {
return len(repoRefs) == 1
}
var singleRef reference.Named
canonicalRefs := map[string]struct{}{}
for _, repoRef := range repoRefs {
if _, isCanonical := repoRef.(reference.Canonical); isCanonical {
canonicalRefs[repoRef.Name()] = struct{}{}
} else if singleRef == nil {
singleRef = repoRef
} else {
return false
}
}
if singleRef == nil {
// Just use first canonical ref
singleRef = repoRefs[0]
}
_, ok := canonicalRefs[singleRef.Name()]
return len(canonicalRefs) == 1 && ok
}
// isImageIDPrefix returns whether the given possiblePrefix is a prefix of the
// given imageID.
func isImageIDPrefix(imageID, possiblePrefix string) bool {