summaryrefslogtreecommitdiff
path: root/cmd/podman/ps.go
blob: a0b6f134bdcef1c0140e67689713f0117a79dd89 (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
package main

import (
	"encoding/json"
	"fmt"
	"reflect"
	"strconv"
	"strings"
	"time"

	"github.com/cri-o/ocicni/pkg/ocicni"
	"github.com/docker/go-units"
	specs "github.com/opencontainers/runtime-spec/specs-go"
	"github.com/pkg/errors"
	"github.com/projectatomic/libpod/cmd/podman/batchcontainer"
	"github.com/projectatomic/libpod/cmd/podman/formats"
	"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
	"github.com/projectatomic/libpod/libpod"
	"github.com/projectatomic/libpod/pkg/util"
	"github.com/sirupsen/logrus"
	"github.com/urfave/cli"
	"k8s.io/apimachinery/pkg/fields"
)

const mountTruncLength = 12

type psTemplateParams struct {
	ID         string
	Image      string
	Command    string
	CreatedAt  string
	RunningFor string
	Status     string
	Ports      string
	Size       string
	Names      string
	Labels     string
	Mounts     string
	PID        int
	Cgroup     string
	IPC        string
	MNT        string
	NET        string
	PIDNS      string
	User       string
	UTS        string
}

// psJSONParams is only used when the JSON format is specified,
// and is better for data processing from JSON.
// psJSONParams will be populated by data from libpod.Container,
// the members of the struct are the sama data types as their sources.
type psJSONParams struct {
	ID               string                    `json:"id"`
	Image            string                    `json:"image"`
	ImageID          string                    `json:"image_id"`
	Command          []string                  `json:"command"`
	CreatedAt        time.Time                 `json:"createdAt"`
	RunningFor       time.Duration             `json:"runningFor"`
	Status           string                    `json:"status"`
	Ports            []ocicni.PortMapping      `json:"ports"`
	RootFsSize       int64                     `json:"rootFsSize"`
	RWSize           int64                     `json:"rwSize"`
	Names            string                    `json:"names"`
	Labels           fields.Set                `json:"labels"`
	Mounts           []specs.Mount             `json:"mounts"`
	ContainerRunning bool                      `json:"ctrRunning"`
	Namespaces       *batchcontainer.Namespace `json:"namespace,omitempty"`
}

var (
	psFlags = []cli.Flag{
		cli.BoolFlag{
			Name:  "all, a",
			Usage: "Show all the containers, default is only running containers",
		},
		cli.StringFlag{
			Name:  "filter, f",
			Usage: "Filter output based on conditions given",
		},
		cli.StringFlag{
			Name:  "format",
			Usage: "Pretty-print containers to JSON or using a Go template",
		},
		cli.IntFlag{
			Name:  "last, n",
			Usage: "Print the n last created containers (all states)",
			Value: -1,
		},
		cli.BoolFlag{
			Name:  "latest, l",
			Usage: "Show the latest container created (all states)",
		},
		cli.BoolFlag{
			Name:  "no-trunc",
			Usage: "Display the extended information",
		},
		cli.BoolFlag{
			Name:  "quiet, q",
			Usage: "Print the numeric IDs of the containers only",
		},
		cli.BoolFlag{
			Name:  "size, s",
			Usage: "Display the total file sizes",
		},
		cli.BoolFlag{
			Name:  "namespace, ns",
			Usage: "Display namespace information",
		},
	}
	psDescription = "Prints out information about the containers"
	psCommand     = cli.Command{
		Name:                   "ps",
		Usage:                  "List containers",
		Description:            psDescription,
		Flags:                  psFlags,
		Action:                 psCmd,
		ArgsUsage:              "",
		UseShortOptionHandling: true,
	}
)

func psCmd(c *cli.Context) error {
	if err := validateFlags(c, psFlags); err != nil {
		return err
	}

	if err := checkFlagsPassed(c); err != nil {
		return errors.Wrapf(err, "error with flags passed")
	}

	runtime, err := libpodruntime.GetRuntime(c)
	if err != nil {
		return errors.Wrapf(err, "error creating libpod runtime")
	}

	defer runtime.Shutdown(false)

	if len(c.Args()) > 0 {
		return errors.Errorf("too many arguments, ps takes no arguments")
	}

	format := genPsFormat(c.String("format"), c.Bool("quiet"), c.Bool("size"), c.Bool("namespace"))

	opts := batchcontainer.PsOptions{
		All:       c.Bool("all"),
		Filter:    c.String("filter"),
		Format:    format,
		Last:      c.Int("last"),
		Latest:    c.Bool("latest"),
		NoTrunc:   c.Bool("no-trunc"),
		Quiet:     c.Bool("quiet"),
		Size:      c.Bool("size"),
		Namespace: c.Bool("namespace"),
	}

	var filterFuncs []libpod.ContainerFilter
	// When we are dealing with latest or last=n, we need to
	// get all containers.
	if !opts.All && !opts.Latest && opts.Last < 1 {
		// only get running containers
		filterFuncs = append(filterFuncs, func(c *libpod.Container) bool {
			state, _ := c.State()
			return state == libpod.ContainerStateRunning
		})
	}

	if opts.Filter != "" {
		filters := strings.Split(opts.Filter, ",")
		for _, f := range filters {
			filterSplit := strings.Split(f, "=")
			if len(filterSplit) < 2 {
				return errors.Errorf("filter input must be in the form of filter=value: %s is invalid", f)
			}
			generatedFunc, err := generateContainerFilterFuncs(filterSplit[0], filterSplit[1], runtime)
			if err != nil {
				return errors.Wrapf(err, "invalid filter")
			}
			filterFuncs = append(filterFuncs, generatedFunc)
		}
	}

	containers, err := runtime.GetContainers(filterFuncs...)
	var outputContainers []*libpod.Container
	if opts.Latest && len(containers) > 0 {
		outputContainers = append(outputContainers, containers[0])
	} else if opts.Last > 0 && opts.Last <= len(containers) {
		outputContainers = append(outputContainers, containers[:opts.Last]...)
	} else {
		outputContainers = containers
	}

	return generatePsOutput(outputContainers, opts)
}

// checkFlagsPassed checks if mutually exclusive flags are passed together
func checkFlagsPassed(c *cli.Context) error {
	// latest, and last are mutually exclusive.
	if c.Int("last") >= 0 && c.Bool("latest") {
		return errors.Errorf("last and latest are mutually exclusive")
	}
	// quiet, size, namespace, and format with Go template are mutually exclusive
	flags := 0
	if c.Bool("quiet") {
		flags++
	}
	if c.Bool("size") {
		flags++
	}
	if c.Bool("namespace") {
		flags++
	}
	if c.IsSet("format") && c.String("format") != formats.JSONString {
		flags++
	}
	if flags > 1 {
		return errors.Errorf("quiet, size, namespace, and format with Go template are mutually exclusive")
	}
	return nil
}

func generateContainerFilterFuncs(filter, filterValue string, runtime *libpod.Runtime) (func(container *libpod.Container) bool, error) {
	switch filter {
	case "id":
		return func(c *libpod.Container) bool {
			return strings.Contains(c.ID(), filterValue)
		}, nil
	case "label":
		return func(c *libpod.Container) bool {
			for _, label := range c.Labels() {
				if label == filterValue {
					return true
				}
			}
			return false
		}, nil
	case "name":
		return func(c *libpod.Container) bool {
			return strings.Contains(c.Name(), filterValue)
		}, nil
	case "exited":
		exitCode, err := strconv.ParseInt(filterValue, 10, 32)
		if err != nil {
			return nil, errors.Wrapf(err, "exited code out of range %q", filterValue)
		}
		return func(c *libpod.Container) bool {
			ec, err := c.ExitCode()
			if ec == int32(exitCode) && err == nil {
				return true
			}
			return false
		}, nil
	case "status":
		if !util.StringInSlice(filterValue, []string{"created", "restarting", "running", "paused", "exited", "unknown"}) {
			return nil, errors.Errorf("%s is not a valid status", filterValue)
		}
		return func(c *libpod.Container) bool {
			status, err := c.State()
			if err != nil {
				return false
			}
			state := status.String()
			if status == libpod.ContainerStateConfigured {
				state = "created"
			}
			return state == filterValue
		}, nil
	case "ancestor":
		// This needs to refine to match docker
		// - ancestor=(<image-name>[:tag]|<image-id>| ⟨image@digest⟩) - containers created from an image or a descendant.
		return func(c *libpod.Container) bool {
			containerConfig := c.Config()
			if strings.Contains(containerConfig.RootfsImageID, filterValue) || strings.Contains(containerConfig.RootfsImageName, filterValue) {
				return true
			}
			return false
		}, nil
	case "before":
		ctr, err := runtime.LookupContainer(filterValue)
		if err != nil {
			return nil, errors.Errorf("unable to find container by name or id of %s", filterValue)
		}
		containerConfig := ctr.Config()
		createTime := containerConfig.CreatedTime
		return func(c *libpod.Container) bool {
			cc := c.Config()
			return createTime.After(cc.CreatedTime)
		}, nil
	case "since":
		ctr, err := runtime.LookupContainer(filterValue)
		if err != nil {
			return nil, errors.Errorf("unable to find container by name or id of %s", filterValue)
		}
		containerConfig := ctr.Config()
		createTime := containerConfig.CreatedTime
		return func(c *libpod.Container) bool {
			cc := c.Config()
			return createTime.Before(cc.CreatedTime)
		}, nil
	case "volume":
		//- volume=(<volume-name>|<mount-point-destination>)
		return func(c *libpod.Container) bool {
			containerConfig := c.Config()
			var dest string
			arr := strings.Split(filterValue, ":")
			source := arr[0]
			if len(arr) == 2 {
				dest = arr[1]
			}
			for _, mount := range containerConfig.Spec.Mounts {
				if dest != "" && (mount.Source == source && mount.Destination == dest) {
					return true
				}
				if dest == "" && mount.Source == source {
					return true
				}
			}
			return false
		}, nil
	}
	return nil, errors.Errorf("%s is an invalid filter", filter)
}

// generate the template based on conditions given
func genPsFormat(format string, quiet, size, namespace bool) string {
	if format != "" {
		// "\t" from the command line is not being recognized as a tab
		// replacing the string "\t" to a tab character if the user passes in "\t"
		return strings.Replace(format, `\t`, "\t", -1)
	}
	if quiet {
		return formats.IDString
	}
	if namespace {
		return "table {{.ID}}\t{{.Names}}\t{{.PID}}\t{{.Cgroup}}\t{{.IPC}}\t{{.MNT}}\t{{.NET}}\t{{.PIDNS}}\t{{.User}}\t{{.UTS}}\t"
	}
	format = "table {{.ID}}\t{{.Image}}\t{{.Command}}\t{{.CreatedAt}}\t{{.Status}}\t{{.Ports}}\t{{.Names}}\t"
	if size {
		format += "{{.Size}}\t"
	}
	return format
}

func psToGeneric(templParams []psTemplateParams, JSONParams []psJSONParams) (genericParams []interface{}) {
	if len(templParams) > 0 {
		for _, v := range templParams {
			genericParams = append(genericParams, interface{}(v))
		}
		return
	}
	for _, v := range JSONParams {
		genericParams = append(genericParams, interface{}(v))
	}
	return
}

// generate the accurate header based on template given
func (p *psTemplateParams) headerMap() map[string]string {
	v := reflect.Indirect(reflect.ValueOf(p))
	values := make(map[string]string)

	for i := 0; i < v.NumField(); i++ {
		key := v.Type().Field(i).Name
		value := key
		if value == "ID" {
			value = "Container" + value
		}
		values[key] = strings.ToUpper(splitCamelCase(value))
	}
	return values
}

// getTemplateOutput returns the modified container information
func getTemplateOutput(containers []*libpod.Container, opts batchcontainer.PsOptions) ([]psTemplateParams, error) {
	var (
		psOutput     []psTemplateParams
		status, size string
		ns           *batchcontainer.Namespace
	)

	for _, ctr := range containers {
		batchInfo, err := batchcontainer.BatchContainerOp(ctr, opts)
		if err != nil {
			// If the error was ErrNoSuchCtr, it was probably
			// removed sometime after we got the initial list.
			// Just ignore it.
			if errors.Cause(err) == libpod.ErrNoSuchCtr {
				logrus.Debugf("Container %s removed before batch, ignoring in output", ctr.ID())
				continue
			}

			return nil, err
		}
		ctrID := ctr.ID()
		runningFor := ""
		// If the container has not be started, the "zero" value of time is 0001-01-01 00:00:00 +0000 UTC
		// which would make the time elapsed about a few hundred of years. So checking for the "zero" value of time.Time
		if !batchInfo.StartedTime.IsZero() {
			runningFor = units.HumanDuration(time.Since(batchInfo.StartedTime))
		}
		createdAt := batchInfo.ConConfig.CreatedTime.Format("2006-01-02 15:04:05 -0700 MST")
		imageName := batchInfo.ConConfig.RootfsImageName

		var createArtifact createConfig
		artifact, err := ctr.GetArtifact("create-config")
		if err == nil {
			if err := json.Unmarshal(artifact, &createArtifact); err != nil {
				return nil, err
			}
		} else {
			logrus.Errorf("couldn't get some ps information, error getting artifact %q: %v", ctr.ID(), err)
		}
		if opts.Namespace {
			ns = batchcontainer.GetNamespaces(batchInfo.Pid)
		}
		if opts.Size {

			size = units.HumanSizeWithPrecision(float64(batchInfo.RwSize), 3) + " (virtual " + units.HumanSizeWithPrecision(float64(batchInfo.RootFsSize), 3) + ")"
		}

		command := strings.Join(batchInfo.ConConfig.Spec.Process.Args, " ")
		if !opts.NoTrunc {
			if len(command) > 20 {
				command = command[:19] + "..."
			}
		}
		ports := portsToString(batchInfo.ConConfig.PortMappings)
		mounts := getMounts(createArtifact.Volumes, opts.NoTrunc)
		labels := formatLabels(ctr.Labels())

		switch batchInfo.ConState {
		case libpod.ContainerStateStopped:
			status = fmt.Sprintf("Exited (%d) %s ago", batchInfo.ExitCode, runningFor)
		case libpod.ContainerStateRunning:
			status = "Up " + runningFor + " ago"
		case libpod.ContainerStatePaused:
			status = "Paused"
		case libpod.ContainerStateCreated, libpod.ContainerStateConfigured:
			status = "Created"
		default:
			status = "Dead"
		}

		if !opts.NoTrunc {
			ctrID = shortID(ctr.ID())
			imageName = batchInfo.ConConfig.RootfsImageName
		}

		params := psTemplateParams{
			ID:         ctrID,
			Image:      imageName,
			Command:    command,
			CreatedAt:  createdAt,
			RunningFor: runningFor,
			Status:     status,
			Ports:      ports,
			Size:       size,
			Names:      ctr.Name(),
			Labels:     labels,
			Mounts:     mounts,
			PID:        batchInfo.Pid,
		}

		if opts.Namespace {
			params.Cgroup = ns.Cgroup
			params.IPC = ns.IPC
			params.MNT = ns.MNT
			params.NET = ns.NET
			params.PIDNS = ns.PIDNS
			params.User = ns.User
			params.UTS = ns.UTS
		}
		psOutput = append(psOutput, params)
	}
	return psOutput, nil
}

// getJSONOutput returns the container info in its raw form
func getJSONOutput(containers []*libpod.Container, opts batchcontainer.PsOptions) ([]psJSONParams, error) {
	var (
		psOutput []psJSONParams
		ns       *batchcontainer.Namespace
	)
	for _, ctr := range containers {
		batchInfo, err := batchcontainer.BatchContainerOp(ctr, opts)
		if err != nil {
			return nil, err
		}
		if opts.Namespace {
			ns = batchcontainer.GetNamespaces(batchInfo.Pid)
		}
		params := psJSONParams{
			ID:               ctr.ID(),
			Image:            batchInfo.ConConfig.RootfsImageName,
			ImageID:          batchInfo.ConConfig.RootfsImageID,
			Command:          batchInfo.ConConfig.Spec.Process.Args,
			CreatedAt:        batchInfo.ConConfig.CreatedTime,
			Status:           batchInfo.ConState.String(),
			Ports:            batchInfo.ConConfig.PortMappings,
			RootFsSize:       batchInfo.RootFsSize,
			RWSize:           batchInfo.RwSize,
			Names:            batchInfo.ConConfig.Name,
			Labels:           batchInfo.ConConfig.Labels,
			Mounts:           batchInfo.ConConfig.Spec.Mounts,
			ContainerRunning: batchInfo.ConState == libpod.ContainerStateRunning,
			Namespaces:       ns,
		}

		if !batchInfo.StartedTime.IsZero() {
			params.RunningFor = time.Since(batchInfo.StartedTime)
		}

		psOutput = append(psOutput, params)
	}
	return psOutput, nil
}

func generatePsOutput(containers []*libpod.Container, opts batchcontainer.PsOptions) error {
	if len(containers) == 0 && opts.Format != formats.JSONString {
		return nil
	}
	var out formats.Writer

	switch opts.Format {
	case formats.JSONString:
		psOutput, err := getJSONOutput(containers, opts)
		if err != nil {
			return errors.Wrapf(err, "unable to create JSON for output")
		}
		out = formats.JSONStructArray{Output: psToGeneric([]psTemplateParams{}, psOutput)}
	default:
		psOutput, err := getTemplateOutput(containers, opts)
		if err != nil {
			return errors.Wrapf(err, "unable to create output")
		}
		out = formats.StdoutTemplateArray{Output: psToGeneric(psOutput, []psJSONParams{}), Template: opts.Format, Fields: psOutput[0].headerMap()}
	}

	return formats.Writer(out).Out()
}

// getLabels converts the labels to a string of the form "key=value, key2=value2"
func formatLabels(labels map[string]string) string {
	var arr []string
	if len(labels) > 0 {
		for key, val := range labels {
			temp := key + "=" + val
			arr = append(arr, temp)
		}
		return strings.Join(arr, ",")
	}
	return ""
}

// getMounts converts the volumes mounted to a string of the form "mount1, mount2"
// it truncates it if noTrunc is false
func getMounts(mounts []string, noTrunc bool) string {
	var arr []string
	if len(mounts) == 0 {
		return ""
	}
	for _, mount := range mounts {
		splitArr := strings.Split(mount, ":")
		if len(splitArr[0]) > mountTruncLength && !noTrunc {
			arr = append(arr, splitArr[0][:mountTruncLength]+"...")
			continue
		}
		arr = append(arr, splitArr[0])
	}
	return strings.Join(arr, ",")
}

// portsToString converts the ports used to a string of the from "port1, port2"
func portsToString(ports []ocicni.PortMapping) string {
	var portDisplay []string
	if len(ports) == 0 {
		return ""
	}
	for _, v := range ports {
		hostIP := v.HostIP
		if hostIP == "" {
			hostIP = "0.0.0.0"
		}
		portDisplay = append(portDisplay, fmt.Sprintf("%s:%d->%d/%s", hostIP, v.HostPort, v.ContainerPort, v.Protocol))
	}
	return strings.Join(portDisplay, ", ")
}