package daemon // import "github.com/docker/docker/daemon" import ( "fmt" "sync/atomic" "golang.org/x/net/context" "github.com/docker/docker/api/types" "github.com/docker/docker/api/types/filters" "github.com/docker/docker/pkg/directory" "github.com/docker/docker/volume" "github.com/sirupsen/logrus" ) // SystemDiskUsage returns information about the daemon data disk usage func (daemon *Daemon) SystemDiskUsage(ctx context.Context) (*types.DiskUsage, error) { if !atomic.CompareAndSwapInt32(&daemon.diskUsageRunning, 0, 1) { return nil, fmt.Errorf("a disk usage operation is already running") } defer atomic.StoreInt32(&daemon.diskUsageRunning, 0) // Retrieve container list allContainers, err := daemon.Containers(&types.ContainerListOptions{ Size: true, All: true, }) if err != nil { return nil, fmt.Errorf("failed to retrieve container list: %v", err) } // Get all top images with extra attributes allImages, err := daemon.imageService.Images(filters.NewArgs(), false, true) if err != nil { return nil, fmt.Errorf("failed to retrieve image list: %v", err) } // Get all local volumes allVolumes := []*types.Volume{} getLocalVols := func(v volume.Volume) error { select { case <-ctx.Done(): return ctx.Err() default: if d, ok := v.(volume.DetailedVolume); ok { // skip local volumes with mount options since these could have external // mounted filesystems that will be slow to enumerate. if len(d.Options()) > 0 { return nil } } name := v.Name() refs := daemon.volumes.Refs(v) tv := volumeToAPIType(v) sz, err := directory.Size(ctx, v.Path()) if err != nil { logrus.Warnf("failed to determine size of volume %v", name) sz = -1 } tv.UsageData = &types.VolumeUsageData{Size: sz, RefCount: int64(len(refs))} allVolumes = append(allVolumes, tv) } return nil } err = daemon.traverseLocalVolumes(getLocalVols) if err != nil { return nil, err } allLayersSize, err := daemon.imageService.LayerDiskUsage(ctx) if err != nil { return nil, err } return &types.DiskUsage{ LayersSize: allLayersSize, Containers: allContainers, Volumes: allVolumes, Images: allImages, }, nil }