summaryrefslogtreecommitdiff
path: root/cmd/podman/system_df.go
blob: 183c5a7dddfb8304662aa0563f30f9c36fb61e36 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
package main

import (
	"context"
	"fmt"
	"os"
	"path/filepath"
	"strings"
	"time"

	"github.com/containers/buildah/pkg/formats"
	"github.com/containers/libpod/cmd/podman/cliconfig"
	"github.com/containers/libpod/cmd/podman/libpodruntime"
	"github.com/containers/libpod/libpod"
	"github.com/containers/libpod/libpod/image"
	units "github.com/docker/go-units"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
)

var (
	dfSystemCommand     cliconfig.SystemDfValues
	dfSystemDescription = `
	podman system df

	Show podman disk usage
	`
	_dfSystemCommand = &cobra.Command{
		Use:   "df",
		Short: "Show podman disk usage",
		Long:  dfSystemDescription,
		RunE: func(cmd *cobra.Command, args []string) error {
			dfSystemCommand.GlobalFlags = MainGlobalOpts
			return dfSystemCmd(&dfSystemCommand)
		},
	}
)

type dfMetaData struct {
	images                   []*image.Image
	containers               []*libpod.Container
	activeContainers         map[string]*libpod.Container
	imagesUsedbyCtrMap       map[string][]*libpod.Container
	imagesUsedbyActiveCtr    map[string][]*libpod.Container
	volumes                  []*libpod.Volume
	volumeUsedByContainerMap map[string][]*libpod.Container
}

type systemDfDiskUsage struct {
	Type        string
	Total       int
	Active      int
	Size        string
	Reclaimable string
}

type imageVerboseDiskUsage struct {
	Repository string
	Tag        string
	ImageID    string
	Created    string
	Size       string
	SharedSize string
	UniqueSize string
	Containers int
}

type containerVerboseDiskUsage struct {
	ContainerID  string
	Image        string
	Command      string
	LocalVolumes int
	Size         string
	Created      string
	Status       string
	Names        string
}

type volumeVerboseDiskUsage struct {
	VolumeName string
	Links      int
	Size       string
}

const systemDfDefaultFormat string = "table {{.Type}}\t{{.Total}}\t{{.Active}}\t{{.Size}}\t{{.Reclaimable}}"

func init() {
	dfSystemCommand.Command = _dfSystemCommand
	dfSystemCommand.SetUsageTemplate(UsageTemplate())
	flags := dfSystemCommand.Flags()
	flags.BoolVarP(&dfSystemCommand.Verbose, "verbose", "v", false, "Show detailed information on space usage")
	flags.StringVar(&dfSystemCommand.Format, "format", "", "Pretty-print images using a Go template")
}

func dfSystemCmd(c *cliconfig.SystemDfValues) error {
	runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
	if err != nil {
		return errors.Wrapf(err, "Could not get runtime")
	}
	defer runtime.Shutdown(false)

	ctx := getContext()

	metaData, err := getDfMetaData(ctx, runtime)
	if err != nil {
		return errors.Wrapf(err, "error getting disk usage data")
	}

	if c.Verbose {
		err := verboseOutput(ctx, metaData)
		if err != nil {
			return err
		}
		return nil
	}

	systemDfDiskUsages, err := getDiskUsage(ctx, runtime, metaData)
	if err != nil {
		return errors.Wrapf(err, "error getting output of system df")
	}
	format := systemDfDefaultFormat
	if c.Format != "" {
		format = strings.Replace(c.Format, `\t`, "\t", -1)
	}
	generateSysDfOutput(systemDfDiskUsages, format)
	return nil
}

func generateSysDfOutput(systemDfDiskUsages []systemDfDiskUsage, format string) {
	var systemDfHeader = map[string]string{
		"Type":        "TYPE",
		"Total":       "TOTAL",
		"Active":      "ACTIVE",
		"Size":        "SIZE",
		"Reclaimable": "RECLAIMABLE",
	}
	out := formats.StdoutTemplateArray{Output: systemDfDiskUsageToGeneric(systemDfDiskUsages), Template: format, Fields: systemDfHeader}
	formats.Writer(out).Out()
}

func getDiskUsage(ctx context.Context, runtime *libpod.Runtime, metaData dfMetaData) ([]systemDfDiskUsage, error) {
	imageDiskUsage, err := getImageDiskUsage(ctx, metaData.images, metaData.imagesUsedbyCtrMap, metaData.imagesUsedbyActiveCtr)
	if err != nil {
		return nil, errors.Wrapf(err, "error getting disk usage of images")
	}
	containerDiskUsage, err := getContainerDiskUsage(metaData.containers, metaData.activeContainers)
	if err != nil {
		return nil, errors.Wrapf(err, "error getting disk usage of containers")
	}
	volumeDiskUsage, err := getVolumeDiskUsage(metaData.volumes, metaData.volumeUsedByContainerMap)
	if err != nil {
		return nil, errors.Wrapf(err, "error getting disk usage of volumess")
	}

	systemDfDiskUsages := []systemDfDiskUsage{imageDiskUsage, containerDiskUsage, volumeDiskUsage}
	return systemDfDiskUsages, nil
}

func getDfMetaData(ctx context.Context, runtime *libpod.Runtime) (dfMetaData, error) {
	var metaData dfMetaData
	images, err := runtime.ImageRuntime().GetImages()
	if err != nil {
		return metaData, errors.Wrapf(err, "unable to get images")
	}
	containers, err := runtime.GetAllContainers()
	if err != nil {
		return metaData, errors.Wrapf(err, "error getting all containers")
	}
	volumes, err := runtime.GetAllVolumes()
	if err != nil {
		return metaData, errors.Wrap(err, "error getting all volumes")
	}
	activeContainers, err := activeContainers(containers)
	if err != nil {
		return metaData, errors.Wrapf(err, "error getting active containers")
	}
	imagesUsedbyCtrMap, imagesUsedbyActiveCtr, err := imagesUsedbyCtr(containers, activeContainers)
	if err != nil {
		return metaData, errors.Wrapf(err, "error getting getting images used by containers")
	}
	metaData = dfMetaData{
		images:                   images,
		containers:               containers,
		activeContainers:         activeContainers,
		imagesUsedbyCtrMap:       imagesUsedbyCtrMap,
		imagesUsedbyActiveCtr:    imagesUsedbyActiveCtr,
		volumes:                  volumes,
		volumeUsedByContainerMap: volumeUsedByContainer(containers),
	}
	return metaData, nil
}

func imageUniqueSize(ctx context.Context, images []*image.Image) (map[string]uint64, error) {
	imgUniqueSizeMap := make(map[string]uint64)
	for _, img := range images {
		parentImg := img
		for {
			next, err := parentImg.GetParent()
			if err != nil {
				return nil, errors.Wrapf(err, "error getting parent of image %s", parentImg.ID())
			}
			if next == nil {
				break
			}
			parentImg = next
		}
		imgSize, err := img.Size(ctx)
		if err != nil {
			return nil, err
		}
		if img.ID() == parentImg.ID() {
			imgUniqueSizeMap[img.ID()] = *imgSize
		} else {
			parentImgSize, err := parentImg.Size(ctx)
			if err != nil {
				return nil, errors.Wrapf(err, "error getting size of parent image %s", parentImg.ID())
			}
			imgUniqueSizeMap[img.ID()] = *imgSize - *parentImgSize
		}
	}
	return imgUniqueSizeMap, nil
}

func getImageDiskUsage(ctx context.Context, images []*image.Image, imageUsedbyCintainerMap map[string][]*libpod.Container, imageUsedbyActiveContainerMap map[string][]*libpod.Container) (systemDfDiskUsage, error) {
	var (
		numberOfImages       int
		sumSize              uint64
		numberOfActiveImages int
		unreclaimableSize    uint64
		imageDiskUsage       systemDfDiskUsage
		reclaimableStr       string
	)

	imgUniqueSizeMap, err := imageUniqueSize(ctx, images)
	if err != nil {
		return imageDiskUsage, errors.Wrapf(err, "error getting unique size of images")
	}

	for _, img := range images {

		unreclaimableSize += imageUsedSize(img, imgUniqueSizeMap, imageUsedbyCintainerMap, imageUsedbyActiveContainerMap)

		isParent, err := img.IsParent()
		if err != nil {
			return imageDiskUsage, err
		}
		parent, err := img.GetParent()
		if err != nil {
			return imageDiskUsage, errors.Wrapf(err, "error getting parent of image %s", img.ID())
		}
		if isParent && parent != nil {
			continue
		}
		numberOfImages++
		if _, isActive := imageUsedbyCintainerMap[img.ID()]; isActive {
			numberOfActiveImages++
		}

		if !isParent {
			size, err := img.Size(ctx)
			if err != nil {
				return imageDiskUsage, errors.Wrapf(err, "error getting disk usage of image %s", img.ID())
			}
			sumSize += *size
		}

	}
	sumSizeStr := units.HumanSizeWithPrecision(float64(sumSize), 3)
	reclaimable := sumSize - unreclaimableSize
	if sumSize != 0 {
		reclaimableStr = fmt.Sprintf("%s (%v%%)", units.HumanSizeWithPrecision(float64(reclaimable), 3), 100*reclaimable/sumSize)
	} else {
		reclaimableStr = fmt.Sprintf("%s (%v%%)", units.HumanSizeWithPrecision(float64(reclaimable), 3), 0)
	}
	imageDiskUsage = systemDfDiskUsage{
		Type:        "Images",
		Total:       numberOfImages,
		Active:      numberOfActiveImages,
		Size:        sumSizeStr,
		Reclaimable: reclaimableStr,
	}
	return imageDiskUsage, nil
}

func imageUsedSize(img *image.Image, imgUniqueSizeMap map[string]uint64, imageUsedbyCintainerMap map[string][]*libpod.Container, imageUsedbyActiveContainerMap map[string][]*libpod.Container) uint64 {
	var usedSize uint64
	imgUnique := imgUniqueSizeMap[img.ID()]
	if _, isCtrActive := imageUsedbyActiveContainerMap[img.ID()]; isCtrActive {
		return imgUnique
	}
	containers := imageUsedbyCintainerMap[img.ID()]
	for _, ctr := range containers {
		if len(ctr.UserVolumes()) > 0 {
			usedSize += imgUnique
			return usedSize
		}
	}
	return usedSize
}

func imagesUsedbyCtr(containers []*libpod.Container, activeContainers map[string]*libpod.Container) (map[string][]*libpod.Container, map[string][]*libpod.Container, error) {
	imgCtrMap := make(map[string][]*libpod.Container)
	imgActiveCtrMap := make(map[string][]*libpod.Container)
	for _, ctr := range containers {
		imgID, _ := ctr.Image()
		imgCtrMap[imgID] = append(imgCtrMap[imgID], ctr)
		if _, isActive := activeContainers[ctr.ID()]; isActive {
			imgActiveCtrMap[imgID] = append(imgActiveCtrMap[imgID], ctr)
		}
	}
	return imgCtrMap, imgActiveCtrMap, nil
}

func getContainerDiskUsage(containers []*libpod.Container, activeContainers map[string]*libpod.Container) (systemDfDiskUsage, error) {
	var (
		sumSize           int64
		unreclaimableSize int64
		reclaimableStr    string
	)
	for _, ctr := range containers {
		size, err := ctr.RWSize()
		if err != nil {
			return systemDfDiskUsage{}, errors.Wrapf(err, "error getting size of container %s", ctr.ID())
		}
		sumSize += size
	}
	for _, activeCtr := range activeContainers {
		size, err := activeCtr.RWSize()
		if err != nil {
			return systemDfDiskUsage{}, errors.Wrapf(err, "error getting size of active container %s", activeCtr.ID())
		}
		unreclaimableSize += size
	}
	if sumSize == 0 {
		reclaimableStr = fmt.Sprintf("%s (%v%%)", units.HumanSizeWithPrecision(0, 3), 0)
	} else {
		reclaimable := sumSize - unreclaimableSize
		reclaimableStr = fmt.Sprintf("%s (%v%%)", units.HumanSizeWithPrecision(float64(reclaimable), 3), 100*reclaimable/sumSize)
	}
	containerDiskUsage := systemDfDiskUsage{
		Type:        "Containers",
		Total:       len(containers),
		Active:      len(activeContainers),
		Size:        units.HumanSizeWithPrecision(float64(sumSize), 3),
		Reclaimable: reclaimableStr,
	}
	return containerDiskUsage, nil
}

func ctrIsActive(ctr *libpod.Container) (bool, error) {
	state, err := ctr.State()
	if err != nil {
		return false, err
	}
	return state == libpod.ContainerStatePaused || state == libpod.ContainerStateRunning, nil
}

func activeContainers(containers []*libpod.Container) (map[string]*libpod.Container, error) {
	activeContainers := make(map[string]*libpod.Container)
	for _, aCtr := range containers {
		isActive, err := ctrIsActive(aCtr)
		if err != nil {
			return nil, err
		}
		if isActive {
			activeContainers[aCtr.ID()] = aCtr
		}
	}
	return activeContainers, nil
}

func getVolumeDiskUsage(volumes []*libpod.Volume, volumeUsedByContainerMap map[string][]*libpod.Container) (systemDfDiskUsage, error) {
	var (
		sumSize           int64
		unreclaimableSize int64
		reclaimableStr    string
	)
	for _, volume := range volumes {
		size, err := volumeSize(volume)
		if err != nil {
			return systemDfDiskUsage{}, errors.Wrapf(err, "error getting size of volime %s", volume.Name())
		}
		sumSize += size
		if _, exist := volumeUsedByContainerMap[volume.Name()]; exist {
			unreclaimableSize += size
		}
	}
	reclaimable := sumSize - unreclaimableSize
	if sumSize != 0 {
		reclaimableStr = fmt.Sprintf("%s (%v%%)", units.HumanSizeWithPrecision(float64(reclaimable), 3), 100*reclaimable/sumSize)
	} else {
		reclaimableStr = fmt.Sprintf("%s (%v%%)", units.HumanSizeWithPrecision(float64(reclaimable), 3), 0)
	}
	volumesDiskUsage := systemDfDiskUsage{
		Type:        "Local Volumes",
		Total:       len(volumes),
		Active:      len(volumeUsedByContainerMap),
		Size:        units.HumanSizeWithPrecision(float64(sumSize), 3),
		Reclaimable: reclaimableStr,
	}
	return volumesDiskUsage, nil
}

func volumeUsedByContainer(containers []*libpod.Container) map[string][]*libpod.Container {
	volumeUsedByContainerMap := make(map[string][]*libpod.Container)
	for _, ctr := range containers {

		ctrVolumes := ctr.UserVolumes()
		for _, ctrVolume := range ctrVolumes {
			volumeUsedByContainerMap[ctrVolume] = append(volumeUsedByContainerMap[ctrVolume], ctr)
		}
	}
	return volumeUsedByContainerMap
}

func volumeSize(volume *libpod.Volume) (int64, error) {
	var size int64
	err := filepath.Walk(volume.MountPoint(), func(path string, info os.FileInfo, err error) error {
		if err == nil && !info.IsDir() {
			size += info.Size()
		}
		return err
	})
	return size, err
}

func getImageVerboseDiskUsage(ctx context.Context, images []*image.Image, imagesUsedbyCtr map[string][]*libpod.Container) ([]imageVerboseDiskUsage, error) {
	var imagesVerboseDiskUsage []imageVerboseDiskUsage
	imgUniqueSizeMap, err := imageUniqueSize(ctx, images)
	if err != nil {
		return imagesVerboseDiskUsage, errors.Wrapf(err, "error getting unique size of images")
	}
	for _, img := range images {
		isParent, err := img.IsParent()
		if err != nil {
			return imagesVerboseDiskUsage, errors.Wrapf(err, "error checking if %s is a parent images", img.ID())
		}
		parent, err := img.GetParent()
		if err != nil {
			return imagesVerboseDiskUsage, errors.Wrapf(err, "error getting parent of image %s", img.ID())
		}
		if isParent && parent != nil {
			continue
		}
		size, err := img.Size(ctx)
		if err != nil {
			return imagesVerboseDiskUsage, errors.Wrapf(err, "error getting size of image %s", img.ID())
		}
		numberOfContainers := 0
		if ctrs, exist := imagesUsedbyCtr[img.ID()]; exist {
			numberOfContainers = len(ctrs)
		}
		var repo string
		var tag string
		if len(img.Names()) == 0 {
			repo = "<none>"
			tag = "<none>"
		}
		repopairs, err := image.ReposToMap([]string{img.Names()[0]})
		if err != nil {
			logrus.Errorf("error finding tag/digest for %s", img.ID())
		}
		for reponame, tags := range repopairs {
			for _, tagname := range tags {
				repo = reponame
				tag = tagname
			}
		}

		imageVerbosedf := imageVerboseDiskUsage{
			Repository: repo,
			Tag:        tag,
			ImageID:    shortID(img.ID()),
			Created:    units.HumanDuration(time.Since((img.Created().Local()))) + " ago",
			Size:       units.HumanSizeWithPrecision(float64(*size), 3),
			SharedSize: units.HumanSizeWithPrecision(float64(*size-imgUniqueSizeMap[img.ID()]), 3),
			UniqueSize: units.HumanSizeWithPrecision(float64(imgUniqueSizeMap[img.ID()]), 3),
			Containers: numberOfContainers,
		}
		imagesVerboseDiskUsage = append(imagesVerboseDiskUsage, imageVerbosedf)
	}
	return imagesVerboseDiskUsage, nil
}

func getContainerVerboseDiskUsage(containers []*libpod.Container) (containersVerboseDiskUsage []containerVerboseDiskUsage, err error) {
	for _, ctr := range containers {
		imgID, _ := ctr.Image()
		size, err := ctr.RWSize()
		if err != nil {
			return containersVerboseDiskUsage, errors.Wrapf(err, "error getting size of container %s", ctr.ID())
		}
		state, err := ctr.State()
		if err != nil {
			return containersVerboseDiskUsage, errors.Wrapf(err, "error getting the state of container %s", ctr.ID())
		}

		ctrVerboseData := containerVerboseDiskUsage{
			ContainerID:  shortID(ctr.ID()),
			Image:        shortImageID(imgID),
			Command:      strings.Join(ctr.Command(), " "),
			LocalVolumes: len(ctr.UserVolumes()),
			Size:         units.HumanSizeWithPrecision(float64(size), 3),
			Created:      units.HumanDuration(time.Since(ctr.CreatedTime().Local())) + "ago",
			Status:       state.String(),
			Names:        ctr.Name(),
		}
		containersVerboseDiskUsage = append(containersVerboseDiskUsage, ctrVerboseData)

	}
	return containersVerboseDiskUsage, nil
}

func getVolumeVerboseDiskUsage(volumes []*libpod.Volume, volumeUsedByContainerMap map[string][]*libpod.Container) (volumesVerboseDiskUsage []volumeVerboseDiskUsage, err error) {
	for _, vol := range volumes {
		volSize, err := volumeSize(vol)
		if err != nil {
			return volumesVerboseDiskUsage, errors.Wrapf(err, "error getting size of volume %s", vol.Name())
		}
		links := 0
		if linkCtr, exist := volumeUsedByContainerMap[vol.Name()]; exist {
			links = len(linkCtr)
		}
		volumeVerboseData := volumeVerboseDiskUsage{
			VolumeName: vol.Name(),
			Links:      links,
			Size:       units.HumanSizeWithPrecision(float64(volSize), 3),
		}
		volumesVerboseDiskUsage = append(volumesVerboseDiskUsage, volumeVerboseData)
	}
	return volumesVerboseDiskUsage, nil
}

func imagesVerboseOutput(ctx context.Context, metaData dfMetaData) error {
	var imageVerboseHeader = map[string]string{
		"Repository": "REPOSITORY",
		"Tag":        "TAG",
		"ImageID":    "IMAGE ID",
		"Created":    "CREATED",
		"Size":       "SIZE",
		"SharedSize": "SHARED SIZE",
		"UniqueSize": "UNQUE SIZE",
		"Containers": "CONTAINERS",
	}
	imagesVerboseDiskUsage, err := getImageVerboseDiskUsage(ctx, metaData.images, metaData.imagesUsedbyCtrMap)
	if err != nil {
		return errors.Wrapf(err, "error getting verbose output of images")
	}
	os.Stderr.WriteString("Images space usage:\n\n")
	out := formats.StdoutTemplateArray{Output: systemDfImageVerboseDiskUsageToGeneric(imagesVerboseDiskUsage), Template: "table {{.Repository}}\t{{.Tag}}\t{{.ImageID}}\t{{.Created}}\t{{.Size}}\t{{.SharedSize}}\t{{.UniqueSize}}\t{{.Containers}}", Fields: imageVerboseHeader}
	formats.Writer(out).Out()
	return nil
}

func containersVerboseOutput(ctx context.Context, metaData dfMetaData) error {
	var containerVerboseHeader = map[string]string{
		"ContainerID":  "CONTAINER ID ",
		"Image":        "IMAGE",
		"Command":      "COMMAND",
		"LocalVolumes": "LOCAL VOLUMES",
		"Size":         "SIZE",
		"Created":      "CREATED",
		"Status":       "STATUS",
		"Names":        "NAMES",
	}
	containersVerboseDiskUsage, err := getContainerVerboseDiskUsage(metaData.containers)
	if err != nil {
		return errors.Wrapf(err, "error getting verbose output of containers")
	}
	os.Stderr.WriteString("\nContainers space usage:\n\n")
	out := formats.StdoutTemplateArray{Output: systemDfContainerVerboseDiskUsageToGeneric(containersVerboseDiskUsage), Template: "table {{.ContainerID}}\t{{.Image}}\t{{.Command}}\t{{.LocalVolumes}}\t{{.Size}}\t{{.Created}}\t{{.Status}}\t{{.Names}}", Fields: containerVerboseHeader}
	formats.Writer(out).Out()
	return nil
}

func volumesVerboseOutput(ctx context.Context, metaData dfMetaData) error {
	var volumeVerboseHeader = map[string]string{
		"VolumeName": "VOLUME NAME",
		"Links":      "LINKS",
		"Size":       "SIZE",
	}
	volumesVerboseDiskUsage, err := getVolumeVerboseDiskUsage(metaData.volumes, metaData.volumeUsedByContainerMap)
	if err != nil {
		return errors.Wrapf(err, "error getting verbose ouput of volumes")
	}
	os.Stderr.WriteString("\nLocal Volumes space usage:\n\n")
	out := formats.StdoutTemplateArray{Output: systemDfVolumeVerboseDiskUsageToGeneric(volumesVerboseDiskUsage), Template: "table {{.VolumeName}}\t{{.Links}}\t{{.Size}}", Fields: volumeVerboseHeader}
	formats.Writer(out).Out()
	return nil
}

func verboseOutput(ctx context.Context, metaData dfMetaData) error {
	if err := imagesVerboseOutput(ctx, metaData); err != nil {
		return err
	}
	if err := containersVerboseOutput(ctx, metaData); err != nil {
		return err
	}
	if err := volumesVerboseOutput(ctx, metaData); err != nil {
		return err
	}
	return nil
}

func systemDfDiskUsageToGeneric(diskUsages []systemDfDiskUsage) (out []interface{}) {
	for _, usage := range diskUsages {
		out = append(out, interface{}(usage))
	}
	return out
}

func systemDfImageVerboseDiskUsageToGeneric(diskUsages []imageVerboseDiskUsage) (out []interface{}) {
	for _, usage := range diskUsages {
		out = append(out, interface{}(usage))
	}
	return out
}

func systemDfContainerVerboseDiskUsageToGeneric(diskUsages []containerVerboseDiskUsage) (out []interface{}) {
	for _, usage := range diskUsages {
		out = append(out, interface{}(usage))
	}
	return out
}

func systemDfVolumeVerboseDiskUsageToGeneric(diskUsages []volumeVerboseDiskUsage) (out []interface{}) {
	for _, usage := range diskUsages {
		out = append(out, interface{}(usage))
	}
	return out
}

func shortImageID(id string) string {
	const imageIDTruncLength int = 4
	if len(id) > imageIDTruncLength {
		return id[:imageIDTruncLength]
	}
	return id
}