1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
moby--moby/daemon/prune.go

153 lines
3.9 KiB
Go
Raw Normal View History

package daemon
import (
"github.com/Sirupsen/logrus"
"github.com/docker/distribution/digest"
"github.com/docker/docker/api/types"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/directory"
"github.com/docker/docker/reference"
"github.com/docker/docker/volume"
)
// ContainersPrune removes unused containers
func (daemon *Daemon) ContainersPrune(config *types.ContainersPruneConfig) (*types.ContainersPruneReport, error) {
rep := &types.ContainersPruneReport{}
allContainers := daemon.List()
for _, c := range allContainers {
if !c.IsRunning() {
cSize, _ := daemon.getSize(c)
// TODO: sets RmLink to true?
err := daemon.ContainerRm(c.ID, &types.ContainerRmConfig{})
if err != nil {
logrus.Warnf("failed to prune container %s: %v", c.ID, err)
continue
}
if cSize > 0 {
rep.SpaceReclaimed += uint64(cSize)
}
rep.ContainersDeleted = append(rep.ContainersDeleted, c.ID)
}
}
return rep, nil
}
// VolumesPrune removes unused local volumes
func (daemon *Daemon) VolumesPrune(config *types.VolumesPruneConfig) (*types.VolumesPruneReport, error) {
rep := &types.VolumesPruneReport{}
pruneVols := func(v volume.Volume) error {
name := v.Name()
refs := daemon.volumes.Refs(v)
if len(refs) == 0 {
vSize, err := directory.Size(v.Path())
if err != nil {
logrus.Warnf("could not determine size of volume %s: %v", name, err)
}
err = daemon.volumes.Remove(v)
if err != nil {
logrus.Warnf("could not remove volume %s: %v", name, err)
return nil
}
rep.SpaceReclaimed += uint64(vSize)
rep.VolumesDeleted = append(rep.VolumesDeleted, name)
}
return nil
}
err := daemon.traverseLocalVolumes(pruneVols)
return rep, err
}
// ImagesPrune removes unused images
func (daemon *Daemon) ImagesPrune(config *types.ImagesPruneConfig) (*types.ImagesPruneReport, error) {
rep := &types.ImagesPruneReport{}
var allImages map[image.ID]*image.Image
if config.DanglingOnly {
allImages = daemon.imageStore.Heads()
} else {
allImages = daemon.imageStore.Map()
}
allContainers := daemon.List()
imageRefs := map[string]bool{}
for _, c := range allContainers {
imageRefs[c.ID] = true
}
// Filter intermediary images and get their unique size
allLayers := daemon.layerStore.Map()
topImages := map[image.ID]*image.Image{}
for id, img := range allImages {
dgst := digest.Digest(id)
if len(daemon.referenceStore.References(dgst)) == 0 && len(daemon.imageStore.Children(id)) != 0 {
continue
}
topImages[id] = img
}
for id := range topImages {
dgst := digest.Digest(id)
hex := dgst.Hex()
if _, ok := imageRefs[hex]; ok {
continue
}
deletedImages := []types.ImageDelete{}
refs := daemon.referenceStore.References(dgst)
if len(refs) > 0 {
if config.DanglingOnly {
// Not a dangling image
continue
}
nrRefs := len(refs)
for _, ref := range refs {
// If nrRefs == 1, we have an image marked as myreponame:<none>
// i.e. the tag content was changed
if _, ok := ref.(reference.Canonical); ok && nrRefs > 1 {
continue
}
imgDel, err := daemon.ImageDelete(ref.String(), false, true)
if err != nil {
logrus.Warnf("could not delete reference %s: %v", ref.String(), err)
continue
}
deletedImages = append(deletedImages, imgDel...)
}
} else {
imgDel, err := daemon.ImageDelete(hex, false, true)
if err != nil {
logrus.Warnf("could not delete image %s: %v", hex, err)
continue
}
deletedImages = append(deletedImages, imgDel...)
}
rep.ImagesDeleted = append(rep.ImagesDeleted, deletedImages...)
}
// Compute how much space was freed
for _, d := range rep.ImagesDeleted {
if d.Deleted != "" {
chid := layer.ChainID(d.Deleted)
if l, ok := allLayers[chid]; ok {
diffSize, err := l.DiffSize()
if err != nil {
logrus.Warnf("failed to get layer %s size: %v", chid, err)
continue
}
rep.SpaceReclaimed += uint64(diffSize)
}
}
}
return rep, nil
}