mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
300 lines
8.1 KiB
Go
300 lines
8.1 KiB
Go
package daemon
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import (
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"fmt"
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"regexp"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/docker/distribution/reference"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/filters"
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timetypes "github.com/docker/docker/api/types/time"
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"github.com/docker/docker/image"
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"github.com/docker/docker/layer"
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"github.com/docker/docker/pkg/directory"
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"github.com/docker/docker/runconfig"
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"github.com/docker/docker/volume"
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"github.com/docker/libnetwork"
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digest "github.com/opencontainers/go-digest"
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)
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// ContainersPrune removes unused containers
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func (daemon *Daemon) ContainersPrune(pruneFilters filters.Args) (*types.ContainersPruneReport, error) {
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rep := &types.ContainersPruneReport{}
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until, err := getUntilFromPruneFilters(pruneFilters)
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if err != nil {
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return nil, err
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}
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allContainers := daemon.List()
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for _, c := range allContainers {
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if !c.IsRunning() {
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if !until.IsZero() && c.Created.After(until) {
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continue
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}
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cSize, _ := daemon.getSize(c.ID)
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// TODO: sets RmLink to true?
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err := daemon.ContainerRm(c.ID, &types.ContainerRmConfig{})
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if err != nil {
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logrus.Warnf("failed to prune container %s: %v", c.ID, err)
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continue
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}
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if cSize > 0 {
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rep.SpaceReclaimed += uint64(cSize)
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}
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rep.ContainersDeleted = append(rep.ContainersDeleted, c.ID)
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}
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}
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return rep, nil
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}
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// VolumesPrune removes unused local volumes
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func (daemon *Daemon) VolumesPrune(pruneFilters filters.Args) (*types.VolumesPruneReport, error) {
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rep := &types.VolumesPruneReport{}
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pruneVols := func(v volume.Volume) error {
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name := v.Name()
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refs := daemon.volumes.Refs(v)
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if len(refs) == 0 {
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vSize, err := directory.Size(v.Path())
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if err != nil {
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logrus.Warnf("could not determine size of volume %s: %v", name, err)
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}
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err = daemon.volumes.Remove(v)
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if err != nil {
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logrus.Warnf("could not remove volume %s: %v", name, err)
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return nil
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}
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rep.SpaceReclaimed += uint64(vSize)
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rep.VolumesDeleted = append(rep.VolumesDeleted, name)
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}
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return nil
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}
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err := daemon.traverseLocalVolumes(pruneVols)
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return rep, err
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}
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// ImagesPrune removes unused images
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func (daemon *Daemon) ImagesPrune(pruneFilters filters.Args) (*types.ImagesPruneReport, error) {
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rep := &types.ImagesPruneReport{}
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danglingOnly := true
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if pruneFilters.Include("dangling") {
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if pruneFilters.ExactMatch("dangling", "false") || pruneFilters.ExactMatch("dangling", "0") {
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danglingOnly = false
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} else if !pruneFilters.ExactMatch("dangling", "true") && !pruneFilters.ExactMatch("dangling", "1") {
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return nil, fmt.Errorf("Invalid filter 'dangling=%s'", pruneFilters.Get("dangling"))
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}
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}
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until, err := getUntilFromPruneFilters(pruneFilters)
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if err != nil {
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return nil, err
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}
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var allImages map[image.ID]*image.Image
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if danglingOnly {
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allImages = daemon.imageStore.Heads()
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} else {
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allImages = daemon.imageStore.Map()
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}
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allContainers := daemon.List()
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imageRefs := map[string]bool{}
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for _, c := range allContainers {
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imageRefs[c.ID] = true
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}
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// Filter intermediary images and get their unique size
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allLayers := daemon.layerStore.Map()
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topImages := map[image.ID]*image.Image{}
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for id, img := range allImages {
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dgst := digest.Digest(id)
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if len(daemon.referenceStore.References(dgst)) == 0 && len(daemon.imageStore.Children(id)) != 0 {
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continue
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}
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if !until.IsZero() && img.Created.After(until) {
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continue
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}
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topImages[id] = img
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}
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for id := range topImages {
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dgst := digest.Digest(id)
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hex := dgst.Hex()
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if _, ok := imageRefs[hex]; ok {
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continue
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}
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deletedImages := []types.ImageDeleteResponseItem{}
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refs := daemon.referenceStore.References(dgst)
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if len(refs) > 0 {
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shouldDelete := !danglingOnly
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if !shouldDelete {
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hasTag := false
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for _, ref := range refs {
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if _, ok := ref.(reference.NamedTagged); ok {
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hasTag = true
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break
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}
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}
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// Only delete if it's untagged (i.e. repo:<none>)
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shouldDelete = !hasTag
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}
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if shouldDelete {
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for _, ref := range refs {
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imgDel, err := daemon.ImageDelete(ref.String(), false, true)
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if err != nil {
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logrus.Warnf("could not delete reference %s: %v", ref.String(), err)
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continue
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}
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deletedImages = append(deletedImages, imgDel...)
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}
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}
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} else {
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imgDel, err := daemon.ImageDelete(hex, false, true)
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if err != nil {
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logrus.Warnf("could not delete image %s: %v", hex, err)
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continue
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}
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deletedImages = append(deletedImages, imgDel...)
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}
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rep.ImagesDeleted = append(rep.ImagesDeleted, deletedImages...)
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}
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// Compute how much space was freed
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for _, d := range rep.ImagesDeleted {
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if d.Deleted != "" {
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chid := layer.ChainID(d.Deleted)
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if l, ok := allLayers[chid]; ok {
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diffSize, err := l.DiffSize()
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if err != nil {
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logrus.Warnf("failed to get layer %s size: %v", chid, err)
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continue
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}
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rep.SpaceReclaimed += uint64(diffSize)
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}
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}
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}
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return rep, nil
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}
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// localNetworksPrune removes unused local networks
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func (daemon *Daemon) localNetworksPrune(pruneFilters filters.Args) *types.NetworksPruneReport {
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rep := &types.NetworksPruneReport{}
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until, _ := getUntilFromPruneFilters(pruneFilters)
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// When the function returns true, the walk will stop.
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l := func(nw libnetwork.Network) bool {
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if !until.IsZero() && nw.Info().Created().After(until) {
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return false
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}
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nwName := nw.Name()
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if runconfig.IsPreDefinedNetwork(nwName) {
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return false
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}
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if len(nw.Endpoints()) > 0 {
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return false
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}
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if err := daemon.DeleteNetwork(nw.ID()); err != nil {
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logrus.Warnf("could not remove local network %s: %v", nwName, err)
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return false
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}
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rep.NetworksDeleted = append(rep.NetworksDeleted, nwName)
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return false
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}
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daemon.netController.WalkNetworks(l)
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return rep
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}
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// clusterNetworksPrune removes unused cluster networks
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func (daemon *Daemon) clusterNetworksPrune(pruneFilters filters.Args) (*types.NetworksPruneReport, error) {
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rep := &types.NetworksPruneReport{}
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until, _ := getUntilFromPruneFilters(pruneFilters)
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cluster := daemon.GetCluster()
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if !cluster.IsManager() {
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return rep, nil
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}
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networks, err := cluster.GetNetworks()
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if err != nil {
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return rep, err
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}
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networkIsInUse := regexp.MustCompile(`network ([[:alnum:]]+) is in use`)
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for _, nw := range networks {
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if nw.Ingress {
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// Routing-mesh network removal has to be explicitly invoked by user
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continue
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}
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if !until.IsZero() && nw.Created.After(until) {
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continue
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}
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// https://github.com/docker/docker/issues/24186
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// `docker network inspect` unfortunately displays ONLY those containers that are local to that node.
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// So we try to remove it anyway and check the error
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err = cluster.RemoveNetwork(nw.ID)
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if err != nil {
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// we can safely ignore the "network .. is in use" error
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match := networkIsInUse.FindStringSubmatch(err.Error())
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if len(match) != 2 || match[1] != nw.ID {
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logrus.Warnf("could not remove cluster network %s: %v", nw.Name, err)
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}
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continue
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}
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rep.NetworksDeleted = append(rep.NetworksDeleted, nw.Name)
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}
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return rep, nil
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}
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// NetworksPrune removes unused networks
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func (daemon *Daemon) NetworksPrune(pruneFilters filters.Args) (*types.NetworksPruneReport, error) {
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if _, err := getUntilFromPruneFilters(pruneFilters); err != nil {
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return nil, err
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}
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clusterRep, err := daemon.clusterNetworksPrune(pruneFilters)
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if err != nil {
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return nil, fmt.Errorf("could not remove cluster networks: %s", err)
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}
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rep := &types.NetworksPruneReport{}
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rep.NetworksDeleted = append(rep.NetworksDeleted, clusterRep.NetworksDeleted...)
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localRep := daemon.localNetworksPrune(pruneFilters)
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rep.NetworksDeleted = append(rep.NetworksDeleted, localRep.NetworksDeleted...)
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return rep, nil
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}
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func getUntilFromPruneFilters(pruneFilters filters.Args) (time.Time, error) {
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until := time.Time{}
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if !pruneFilters.Include("until") {
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return until, nil
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}
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untilFilters := pruneFilters.Get("until")
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if len(untilFilters) > 1 {
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return until, fmt.Errorf("more than one until filter specified")
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}
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ts, err := timetypes.GetTimestamp(untilFilters[0], time.Now())
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if err != nil {
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return until, err
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}
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seconds, nanoseconds, err := timetypes.ParseTimestamps(ts, 0)
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if err != nil {
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return until, err
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}
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until = time.Unix(seconds, nanoseconds)
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return until, nil
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}
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