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312 lines
8.1 KiB
Go
312 lines
8.1 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
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import (
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"fmt"
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"regexp"
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"sync/atomic"
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"time"
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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/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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"github.com/sirupsen/logrus"
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"golang.org/x/net/context"
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)
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var (
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// errPruneRunning is returned when a prune request is received while
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// one is in progress
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errPruneRunning = fmt.Errorf("a prune operation is already running")
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containersAcceptedFilters = map[string]bool{
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"label": true,
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"label!": true,
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"until": true,
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}
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volumesAcceptedFilters = map[string]bool{
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"label": true,
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"label!": true,
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}
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networksAcceptedFilters = map[string]bool{
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"label": true,
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"label!": true,
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"until": true,
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}
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)
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// ContainersPrune removes unused containers
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func (daemon *Daemon) ContainersPrune(ctx context.Context, pruneFilters filters.Args) (*types.ContainersPruneReport, error) {
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if !atomic.CompareAndSwapInt32(&daemon.pruneRunning, 0, 1) {
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return nil, errPruneRunning
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}
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defer atomic.StoreInt32(&daemon.pruneRunning, 0)
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rep := &types.ContainersPruneReport{}
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// make sure that only accepted filters have been received
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err := pruneFilters.Validate(containersAcceptedFilters)
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if err != nil {
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return nil, err
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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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allContainers := daemon.List()
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for _, c := range allContainers {
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select {
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case <-ctx.Done():
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logrus.Debugf("ContainersPrune operation cancelled: %#v", *rep)
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return rep, nil
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default:
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}
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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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if !matchLabels(pruneFilters, c.Config.Labels) {
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continue
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}
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cSize, _ := daemon.imageService.GetContainerLayerSize(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(ctx context.Context, pruneFilters filters.Args) (*types.VolumesPruneReport, error) {
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if !atomic.CompareAndSwapInt32(&daemon.pruneRunning, 0, 1) {
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return nil, errPruneRunning
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}
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defer atomic.StoreInt32(&daemon.pruneRunning, 0)
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// make sure that only accepted filters have been received
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err := pruneFilters.Validate(volumesAcceptedFilters)
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if err != nil {
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return nil, err
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}
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rep := &types.VolumesPruneReport{}
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pruneVols := func(v volume.Volume) error {
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select {
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case <-ctx.Done():
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logrus.Debugf("VolumesPrune operation cancelled: %#v", *rep)
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return ctx.Err()
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default:
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}
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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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detailedVolume, ok := v.(volume.DetailedVolume)
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if ok {
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if !matchLabels(pruneFilters, detailedVolume.Labels()) {
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return nil
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}
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}
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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.volumeRm(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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if err == context.Canceled {
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return rep, nil
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}
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return rep, err
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}
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// localNetworksPrune removes unused local networks
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func (daemon *Daemon) localNetworksPrune(ctx context.Context, 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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select {
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case <-ctx.Done():
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// context cancelled
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return true
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default:
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}
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if nw.Info().ConfigOnly() {
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return false
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}
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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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if !matchLabels(pruneFilters, nw.Info().Labels()) {
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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(ctx context.Context, 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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select {
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case <-ctx.Done():
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return rep, nil
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default:
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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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if !matchLabels(pruneFilters, nw.Labels) {
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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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}
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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(ctx context.Context, pruneFilters filters.Args) (*types.NetworksPruneReport, error) {
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if !atomic.CompareAndSwapInt32(&daemon.pruneRunning, 0, 1) {
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return nil, errPruneRunning
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}
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defer atomic.StoreInt32(&daemon.pruneRunning, 0)
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// make sure that only accepted filters have been received
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err := pruneFilters.Validate(networksAcceptedFilters)
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if err != nil {
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return nil, err
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}
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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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rep := &types.NetworksPruneReport{}
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if clusterRep, err := daemon.clusterNetworksPrune(ctx, pruneFilters); err == nil {
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rep.NetworksDeleted = append(rep.NetworksDeleted, clusterRep.NetworksDeleted...)
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}
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localRep := daemon.localNetworksPrune(ctx, pruneFilters)
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rep.NetworksDeleted = append(rep.NetworksDeleted, localRep.NetworksDeleted...)
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select {
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case <-ctx.Done():
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logrus.Debugf("NetworksPrune operation cancelled: %#v", *rep)
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return rep, nil
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default:
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}
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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.Contains("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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func matchLabels(pruneFilters filters.Args, labels map[string]string) bool {
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if !pruneFilters.MatchKVList("label", labels) {
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return false
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}
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// By default MatchKVList will return true if field (like 'label!') does not exist
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// So we have to add additional Contains("label!") check
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if pruneFilters.Contains("label!") {
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if pruneFilters.MatchKVList("label!", labels) {
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return false
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}
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}
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return true
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}
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