126 lines
3.2 KiB
Go
126 lines
3.2 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
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import (
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"fmt"
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"sync/atomic"
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"golang.org/x/net/context"
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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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"github.com/docker/docker/layer"
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"github.com/docker/docker/pkg/directory"
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"github.com/docker/docker/volume"
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"github.com/opencontainers/go-digest"
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"github.com/sirupsen/logrus"
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)
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func (daemon *Daemon) getLayerRefs() map[layer.ChainID]int {
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tmpImages := daemon.imageStore.Map()
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layerRefs := map[layer.ChainID]int{}
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for id, img := range tmpImages {
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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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rootFS := *img.RootFS
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rootFS.DiffIDs = nil
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for _, id := range img.RootFS.DiffIDs {
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rootFS.Append(id)
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chid := rootFS.ChainID()
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layerRefs[chid]++
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}
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}
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return layerRefs
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}
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// SystemDiskUsage returns information about the daemon data disk usage
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func (daemon *Daemon) SystemDiskUsage(ctx context.Context) (*types.DiskUsage, error) {
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if !atomic.CompareAndSwapInt32(&daemon.diskUsageRunning, 0, 1) {
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return nil, fmt.Errorf("a disk usage operation is already running")
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}
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defer atomic.StoreInt32(&daemon.diskUsageRunning, 0)
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// Retrieve container list
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allContainers, err := daemon.Containers(&types.ContainerListOptions{
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Size: true,
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All: true,
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})
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if err != nil {
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return nil, fmt.Errorf("failed to retrieve container list: %v", err)
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}
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// Get all top images with extra attributes
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allImages, err := daemon.Images(filters.NewArgs(), false, true)
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if err != nil {
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return nil, fmt.Errorf("failed to retrieve image list: %v", err)
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}
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// Get all local volumes
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allVolumes := []*types.Volume{}
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getLocalVols := func(v volume.Volume) error {
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select {
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case <-ctx.Done():
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return ctx.Err()
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default:
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if d, ok := v.(volume.DetailedVolume); ok {
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// skip local volumes with mount options since these could have external
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// mounted filesystems that will be slow to enumerate.
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if len(d.Options()) > 0 {
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return nil
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}
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}
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name := v.Name()
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refs := daemon.volumes.Refs(v)
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tv := volumeToAPIType(v)
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sz, err := directory.Size(v.Path())
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if err != nil {
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logrus.Warnf("failed to determine size of volume %v", name)
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sz = -1
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}
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tv.UsageData = &types.VolumeUsageData{Size: sz, RefCount: int64(len(refs))}
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allVolumes = append(allVolumes, tv)
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}
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return nil
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}
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err = daemon.traverseLocalVolumes(getLocalVols)
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if err != nil {
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return nil, err
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}
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// Get total layers size on disk
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var allLayersSize int64
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layerRefs := daemon.getLayerRefs()
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for _, ls := range daemon.layerStores {
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allLayers := ls.Map()
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for _, l := range allLayers {
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select {
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case <-ctx.Done():
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return nil, ctx.Err()
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default:
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size, err := l.DiffSize()
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if err == nil {
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if _, ok := layerRefs[l.ChainID()]; ok {
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allLayersSize += size
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} else {
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logrus.Warnf("found leaked image layer %v", l.ChainID())
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}
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} else {
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logrus.Warnf("failed to get diff size for layer %v", l.ChainID())
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}
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}
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}
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}
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return &types.DiskUsage{
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LayersSize: allLayersSize,
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Containers: allContainers,
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Volumes: allVolumes,
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Images: allImages,
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}, nil
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}
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