aboutsummaryrefslogtreecommitdiff
path: root/cmd/podman/ps.go
blob: 482e423b7e13e43ba95d7de12aa24551c5f4c84b (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
package main

import (
	"encoding/json"
	"fmt"
	"html/template"
	"os"
	"reflect"
	"sort"
	"strconv"
	"strings"
	"text/tabwriter"
	"time"

	"github.com/containers/libpod/cmd/podman/cliconfig"
	"github.com/containers/libpod/cmd/podman/formats"
	"github.com/containers/libpod/cmd/podman/libpodruntime"
	"github.com/containers/libpod/cmd/podman/shared"
	"github.com/containers/libpod/libpod"
	"github.com/containers/libpod/pkg/util"
	"github.com/cri-o/ocicni/pkg/ocicni"
	"github.com/docker/go-units"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
	"k8s.io/apimachinery/pkg/fields"
)

const (
	mountTruncLength = 12
	hid              = "CONTAINER ID"
	himage           = "IMAGE"
	hcommand         = "COMMAND"
	hcreated         = "CREATED"
	hstatus          = "STATUS"
	hports           = "PORTS"
	hnames           = "NAMES"
	hsize            = "SIZE"
	hinfra           = "IS INFRA"
	hpod             = "POD"
	nspid            = "PID"
	nscgroup         = "CGROUPNS"
	nsipc            = "IPC"
	nsmnt            = "MNT"
	nsnet            = "NET"
	nspidns          = "PIDNS"
	nsuserns         = "USERNS"
	nsuts            = "UTS"
)

type psTemplateParams struct {
	ID            string
	Image         string
	Command       string
	CreatedAtTime time.Time
	Created       string
	Status        string
	Ports         string
	Size          string
	Names         string
	Labels        string
	Mounts        string
	PID           int
	CGROUPNS      string
	IPC           string
	MNT           string
	NET           string
	PIDNS         string
	USERNS        string
	UTS           string
	Pod           string
	IsInfra       bool
}

// psJSONParams is used as a base structure for the psParams
// If template output is requested, psJSONParams will be converted to
// psTemplateParams.
// 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"`
	ExitCode         int32                 `json:"exitCode"`
	Exited           bool                  `json:"exited"`
	CreatedAt        time.Time             `json:"createdAt"`
	StartedAt        time.Time             `json:"startedAt"`
	ExitedAt         time.Time             `json:"exitedAt"`
	Status           string                `json:"status"`
	PID              int                   `json:"PID"`
	Ports            []ocicni.PortMapping  `json:"ports"`
	Size             *shared.ContainerSize `json:"size,omitempty"`
	Names            string                `json:"names"`
	Labels           fields.Set            `json:"labels"`
	Mounts           []string              `json:"mounts"`
	ContainerRunning bool                  `json:"ctrRunning"`
	Namespaces       *shared.Namespace     `json:"namespace,omitempty"`
	Pod              string                `json:"pod,omitempty"`
	IsInfra          bool                  `json:"infra"`
}

// Type declaration and functions for sorting the PS output
type psSorted []shared.PsContainerOutput

func (a psSorted) Len() int      { return len(a) }
func (a psSorted) Swap(i, j int) { a[i], a[j] = a[j], a[i] }

type psSortedCommand struct{ psSorted }

func (a psSortedCommand) Less(i, j int) bool {
	return a.psSorted[i].Command < a.psSorted[j].Command
}

type psSortedCreated struct{ psSorted }

func (a psSortedCreated) Less(i, j int) bool {
	return a.psSorted[i].CreatedAt.After(a.psSorted[j].CreatedAt)
}

type psSortedId struct{ psSorted }

func (a psSortedId) Less(i, j int) bool { return a.psSorted[i].ID < a.psSorted[j].ID }

type psSortedImage struct{ psSorted }

func (a psSortedImage) Less(i, j int) bool { return a.psSorted[i].Image < a.psSorted[j].Image }

type psSortedNames struct{ psSorted }

func (a psSortedNames) Less(i, j int) bool { return a.psSorted[i].Names < a.psSorted[j].Names }

type psSortedPod struct{ psSorted }

func (a psSortedPod) Less(i, j int) bool { return a.psSorted[i].Pod < a.psSorted[j].Pod }

type psSortedRunningFor struct{ psSorted }

func (a psSortedRunningFor) Less(i, j int) bool {
	return a.psSorted[j].StartedAt.After(a.psSorted[i].StartedAt)
}

type psSortedStatus struct{ psSorted }

func (a psSortedStatus) Less(i, j int) bool { return a.psSorted[i].Status < a.psSorted[j].Status }

type psSortedSize struct{ psSorted }

func (a psSortedSize) Less(i, j int) bool {
	if a.psSorted[i].Size == nil || a.psSorted[j].Size == nil {
		return false
	}
	return a.psSorted[i].Size.RootFsSize < a.psSorted[j].Size.RootFsSize
}

var (
	psCommand     cliconfig.PsValues
	psDescription = "Prints out information about the containers"
	_psCommand    = &cobra.Command{
		Use:     "list",
		Aliases: []string{"ls", "ps"},
		Short:   "List containers",
		Long:    psDescription,
		RunE: func(cmd *cobra.Command, args []string) error {
			psCommand.InputArgs = args
			psCommand.GlobalFlags = MainGlobalOpts
			return psCmd(&psCommand)
		},
		Example: `podman ps -a
  podman ps -a --format "{{.ID}}  {{.Image}}  {{.Labels}}  {{.Mounts}}"
  podman ps --size --sort names`,
	}
)

func init() {
	psCommand.Command = _psCommand
	psCommand.SetUsageTemplate(UsageTemplate())
	flags := psCommand.Flags()
	flags.BoolVarP(&psCommand.All, "all", "a", false, "Show all the containers, default is only running containers")
	flags.StringSliceVarP(&psCommand.Filter, "filter", "f", []string{}, "Filter output based on conditions given")
	flags.StringVar(&psCommand.Format, "format", "", "Pretty-print containers to JSON or using a Go template")
	flags.IntVarP(&psCommand.Last, "last", "n", -1, "Print the n last created containers (all states)")
	flags.BoolVarP(&psCommand.Latest, "latest", "l", false, "Show the latest container created (all states)")
	flags.BoolVar(&psCommand.Namespace, "namespace", false, "Display namespace information")
	flags.BoolVar(&psCommand.Namespace, "ns", false, "Display namespace information")
	flags.BoolVar(&psCommand.NoTrunct, "no-trunc", false, "Display the extended information")
	flags.BoolVarP(&psCommand.Pod, "pod", "p", false, "Print the ID and name of the pod the containers are associated with")
	flags.BoolVarP(&psCommand.Quiet, "quiet", "q", false, "Print the numeric IDs of the containers only")
	flags.BoolVarP(&psCommand.Size, "size", "s", false, "Display the total file sizes")
	flags.StringVar(&psCommand.Sort, "sort", "created", "Sort output by command, created, id, image, names, runningfor, size, or status")
	flags.BoolVar(&psCommand.Sync, "sync", false, "Sync container state with OCI runtime")

}

func psCmd(c *cliconfig.PsValues) error {
	var (
		filterFuncs      []libpod.ContainerFilter
		outputContainers []*libpod.Container
	)

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

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

	defer runtime.Shutdown(false)

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

	opts := shared.PsOptions{
		All:       c.All,
		Format:    c.Format,
		Last:      c.Last,
		Latest:    c.Latest,
		NoTrunc:   c.NoTrunct,
		Pod:       c.Pod,
		Quiet:     c.Quiet,
		Size:      c.Size,
		Namespace: c.Namespace,
		Sort:      c.Sort,
		Sync:      c.Sync,
	}

	filters := c.Filter
	if len(filters) > 0 {
		for _, f := range filters {
			filterSplit := strings.SplitN(f, "=", 2)
			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)
		}
	}

	if !opts.Latest {
		// Get all containers
		containers, err := runtime.GetContainers(filterFuncs...)
		if err != nil {
			return err
		}

		// We only want the last few containers
		if opts.Last > 0 && opts.Last <= len(containers) {
			return errors.Errorf("--last not yet supported")
		} else {
			outputContainers = containers
		}
	} else {
		// Get just the latest container
		// Ignore filters
		latestCtr, err := runtime.GetLatestContainer()
		if err != nil {
			return err
		}

		outputContainers = []*libpod.Container{latestCtr}
	}

	maxWorkers := shared.Parallelize("ps")
	if c.GlobalIsSet("max-workers") {
		maxWorkers = c.GlobalFlags.MaxWorks
	}
	logrus.Debugf("Setting maximum workers to %d", maxWorkers)

	pss := shared.PBatch(outputContainers, maxWorkers, opts)
	if opts.Sort != "" {
		pss, err = sortPsOutput(opts.Sort, pss)
		if err != nil {
			return err
		}
	}

	// If quiet, print only cids and return
	if opts.Quiet {
		return printQuiet(pss)
	}

	// If the user wants their own GO template format
	if opts.Format != "" {
		if opts.Format == "json" {
			return dumpJSON(pss)
		}
		return printFormat(opts.Format, pss)
	}

	// Define a tab writer with stdout as the output
	w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
	defer w.Flush()

	// Output standard PS headers
	if !opts.Namespace {
		fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\t%s\t%s", hid, himage, hcommand, hcreated, hstatus, hports, hnames)
		// User wants pod info
		if opts.Pod {
			fmt.Fprintf(w, "\t%s", hpod)
		}
		//User wants size info
		if opts.Size {
			fmt.Fprintf(w, "\t%s", hsize)
		}
	} else {
		// Output Namespace headers
		fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s", hid, hnames, nspid, nscgroup, nsipc, nsmnt, nsnet, nspidns, nsuserns, nsuts)
	}

	// Now iterate each container and output its information
	for _, container := range pss {

		// Standard PS output
		if !opts.Namespace {
			fmt.Fprintf(w, "\n%s\t%s\t%s\t%s\t%s\t%s\t%s", container.ID, container.Image, container.Command, container.Created, container.Status, container.Ports, container.Names)
			// User wants pod info
			if opts.Pod {
				fmt.Fprintf(w, "\t%s", container.Pod)
			}
			//User wants size info
			if opts.Size {
				var size string
				if container.Size == nil {
					size = units.HumanSizeWithPrecision(0, 0)
				} else {
					size = units.HumanSizeWithPrecision(float64(container.Size.RwSize), 3) + " (virtual " + units.HumanSizeWithPrecision(float64(container.Size.RootFsSize), 3) + ")"
					fmt.Fprintf(w, "\t%s", size)
				}
			}

		} else {
			// Print namespace information
			ns := shared.GetNamespaces(container.Pid)
			fmt.Fprintf(w, "\n%s\t%s\t%d\t%s\t%s\t%s\t%s\t%s\t%s\t%s", container.ID, container.Names, container.Pid, ns.Cgroup, ns.IPC, ns.MNT, ns.NET, ns.PIDNS, ns.User, ns.UTS)
		}

	}
	fmt.Fprint(w, "\n")
	return nil
}

func printQuiet(containers []shared.PsContainerOutput) error {
	for _, c := range containers {
		fmt.Println(c.ID)
	}
	return nil
}

// checkFlagsPassed checks if mutually exclusive flags are passed together
func checkFlagsPassed(c *cliconfig.PsValues) error {
	// latest, and last are mutually exclusive.
	if c.Last >= 0 && c.Latest {
		return errors.Errorf("last and latest are mutually exclusive")
	}
	// Quiet conflicts with size, namespace, and format with a Go template
	if c.Quiet {
		if c.Size || c.Namespace || (c.Flag("format").Changed &&
			c.Format != formats.JSONString) {
			return errors.Errorf("quiet conflicts with size, namespace, and format with go template")
		}
	}
	// Size and namespace conflict with each other
	if c.Size && c.Namespace {
		return errors.Errorf("size and namespace options conflict")
	}
	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":
		var filterArray []string = strings.SplitN(filterValue, "=", 2)
		var filterKey string = filterArray[0]
		if len(filterArray) > 1 {
			filterValue = filterArray[1]
		} else {
			filterValue = ""
		}
		return func(c *libpod.Container) bool {
			for labelKey, labelValue := range c.Labels() {
				if labelKey == filterKey && ("" == filterValue || labelValue == 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, exited, err := c.ExitCode()
			if ec == int32(exitCode) && err == nil && exited == true {
				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 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
}

func sortPsOutput(sortBy string, psOutput psSorted) (psSorted, error) {
	switch sortBy {
	case "id":
		sort.Sort(psSortedId{psOutput})
	case "image":
		sort.Sort(psSortedImage{psOutput})
	case "command":
		sort.Sort(psSortedCommand{psOutput})
	case "runningfor":
		sort.Sort(psSortedRunningFor{psOutput})
	case "status":
		sort.Sort(psSortedStatus{psOutput})
	case "size":
		sort.Sort(psSortedSize{psOutput})
	case "names":
		sort.Sort(psSortedNames{psOutput})
	case "created":
		sort.Sort(psSortedCreated{psOutput})
	case "pod":
		sort.Sort(psSortedPod{psOutput})
	default:
		return nil, errors.Errorf("invalid option for --sort, options are: command, created, id, image, names, runningfor, size, or status")
	}
	return psOutput, nil
}

// 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 {
	return strings.Join(getMountsArray(mounts, noTrunc), ",")
}

func getMountsArray(mounts []string, noTrunc bool) []string {
	var arr []string
	if len(mounts) == 0 {
		return mounts
	}
	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 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, ", ")
}

func printFormat(format string, containers []shared.PsContainerOutput) error {
	// return immediately if no containers are present
	if len(containers) == 0 {
		return nil
	}

	// Use a tabwriter to align column format
	w := tabwriter.NewWriter(os.Stdout, 0, 0, 3, ' ', 0)

	// Make a map of the field names for the headers
	headerNames := make(map[string]string)
	v := reflect.ValueOf(containers[0])
	t := v.Type()
	for i := 0; i < t.NumField(); i++ {
		headerNames[t.Field(i).Name] = t.Field(i).Name
	}

	// Spit out the header if "table" is present in the format
	if strings.HasPrefix(format, "table") {
		hformat := strings.Replace(strings.TrimSpace(format[5:]), " ", "\t", -1)
		format = hformat
		headerTmpl, err := template.New("header").Parse(hformat)
		if err != nil {
			return err
		}
		if err := headerTmpl.Execute(w, headerNames); err != nil {
			return err
		}
		fmt.Fprintln(w, "")
	}

	// Spit out the data rows now
	dataTmpl, err := template.New("data").Parse(format)
	if err != nil {
		return err
	}

	for _, container := range containers {
		if err := dataTmpl.Execute(w, container); err != nil {
			return err
		}
		fmt.Fprintln(w, "")
	}
	// Flush the writer
	return w.Flush()
}

func dumpJSON(containers []shared.PsContainerOutput) error {
	b, err := json.MarshalIndent(containers, "", "\t")
	if err != nil {
		return err
	}
	os.Stdout.Write(b)
	return nil
}