summaryrefslogtreecommitdiff
path: root/libpod/container_internal.go
blob: 22b39870986b2a919b3c83955decc40d83b00bff (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
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
package libpod

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"io/ioutil"
	"os"
	"path"
	"path/filepath"
	"strings"
	"syscall"
	"time"

	"github.com/containers/storage"
	"github.com/containers/storage/pkg/archive"
	"github.com/containers/storage/pkg/chrootarchive"
	"github.com/containers/storage/pkg/idtools"
	"github.com/docker/docker/pkg/mount"
	"github.com/docker/docker/pkg/stringid"
	spec "github.com/opencontainers/runtime-spec/specs-go"
	"github.com/opencontainers/runtime-tools/generate"
	"github.com/opencontainers/selinux/go-selinux/label"
	"github.com/pkg/errors"
	crioAnnotations "github.com/projectatomic/libpod/pkg/annotations"
	"github.com/projectatomic/libpod/pkg/chrootuser"
	"github.com/projectatomic/libpod/pkg/hooks"
	"github.com/projectatomic/libpod/pkg/hooks/exec"
	"github.com/projectatomic/libpod/pkg/rootless"
	"github.com/projectatomic/libpod/pkg/secrets"
	"github.com/projectatomic/libpod/pkg/util"
	"github.com/sirupsen/logrus"
	"github.com/ulule/deepcopier"
	"golang.org/x/sys/unix"
	"golang.org/x/text/language"
)

const (
	// name of the directory holding the artifacts
	artifactsDir = "artifacts"
)

var (
	// localeToLanguage maps from locale values to language tags.
	localeToLanguage = map[string]string{
		"":      "und-u-va-posix",
		"c":     "und-u-va-posix",
		"posix": "und-u-va-posix",
	}
)

// rootFsSize gets the size of the container's root filesystem
// A container FS is split into two parts.  The first is the top layer, a
// mutable layer, and the rest is the RootFS: the set of immutable layers
// that make up the image on which the container is based.
func (c *Container) rootFsSize() (int64, error) {
	if c.config.Rootfs != "" {
		return 0, nil
	}

	container, err := c.runtime.store.Container(c.ID())
	if err != nil {
		return 0, err
	}

	// Ignore the size of the top layer.   The top layer is a mutable RW layer
	// and is not considered a part of the rootfs
	rwLayer, err := c.runtime.store.Layer(container.LayerID)
	if err != nil {
		return 0, err
	}
	layer, err := c.runtime.store.Layer(rwLayer.Parent)
	if err != nil {
		return 0, err
	}

	size := int64(0)
	for layer.Parent != "" {
		layerSize, err := c.runtime.store.DiffSize(layer.Parent, layer.ID)
		if err != nil {
			return size, errors.Wrapf(err, "getting diffsize of layer %q and its parent %q", layer.ID, layer.Parent)
		}
		size += layerSize
		layer, err = c.runtime.store.Layer(layer.Parent)
		if err != nil {
			return 0, err
		}
	}
	// Get the size of the last layer.  Has to be outside of the loop
	// because the parent of the last layer is "", and lstore.Get("")
	// will return an error.
	layerSize, err := c.runtime.store.DiffSize(layer.Parent, layer.ID)
	return size + layerSize, err
}

// rwSize Gets the size of the mutable top layer of the container.
func (c *Container) rwSize() (int64, error) {
	if c.config.Rootfs != "" {
		var size int64
		err := filepath.Walk(c.config.Rootfs, func(path string, info os.FileInfo, err error) error {
			if err != nil {
				return err
			}
			size += info.Size()
			return nil
		})
		return size, err
	}

	container, err := c.runtime.store.Container(c.ID())
	if err != nil {
		return 0, err
	}

	// Get the size of the top layer by calculating the size of the diff
	// between the layer and its parent.  The top layer of a container is
	// the only RW layer, all others are immutable
	layer, err := c.runtime.store.Layer(container.LayerID)
	if err != nil {
		return 0, err
	}
	return c.runtime.store.DiffSize(layer.Parent, layer.ID)
}

// bundlePath returns the path to the container's root filesystem - where the OCI spec will be
// placed, amongst other things
func (c *Container) bundlePath() string {
	return c.config.StaticDir
}

// ControlSocketPath returns the path to the containers control socket for things like tty
// resizing
func (c *Container) ControlSocketPath() string {
	return filepath.Join(c.bundlePath(), "ctl")
}

// AttachSocketPath retrieves the path of the container's attach socket
func (c *Container) AttachSocketPath() string {
	return filepath.Join(c.runtime.ociRuntime.socketsDir, c.ID(), "attach")
}

// Get PID file path for a container's exec session
func (c *Container) execPidPath(sessionID string) string {
	return filepath.Join(c.state.RunDir, "exec_pid_"+sessionID)
}

// Sync this container with on-disk state and runtime status
// Should only be called with container lock held
// This function should suffice to ensure a container's state is accurate and
// it is valid for use.
func (c *Container) syncContainer() error {
	if err := c.runtime.state.UpdateContainer(c); err != nil {
		return err
	}
	// If runtime knows about the container, update its status in runtime
	// And then save back to disk
	if (c.state.State != ContainerStateUnknown) &&
		(c.state.State != ContainerStateConfigured) {
		oldState := c.state.State
		// TODO: optionally replace this with a stat for the exit file
		if err := c.runtime.ociRuntime.updateContainerStatus(c); err != nil {
			return err
		}
		// Only save back to DB if state changed
		if c.state.State != oldState {
			if err := c.save(); err != nil {
				return err
			}
		}
	}

	if !c.valid {
		return errors.Wrapf(ErrCtrRemoved, "container %s is not valid", c.ID())
	}

	return nil
}

// Make a new container
func newContainer(rspec *spec.Spec, lockDir string) (*Container, error) {
	if rspec == nil {
		return nil, errors.Wrapf(ErrInvalidArg, "must provide a valid runtime spec to create container")
	}

	ctr := new(Container)
	ctr.config = new(ContainerConfig)
	ctr.state = new(containerState)

	ctr.config.ID = stringid.GenerateNonCryptoID()

	ctr.config.Spec = new(spec.Spec)
	deepcopier.Copy(rspec).To(ctr.config.Spec)
	ctr.config.CreatedTime = time.Now()

	ctr.config.ShmSize = DefaultShmSize

	ctr.state.BindMounts = make(map[string]string)

	// Path our lock file will reside at
	lockPath := filepath.Join(lockDir, ctr.config.ID)
	// Grab a lockfile at the given path
	lock, err := storage.GetLockfile(lockPath)
	if err != nil {
		return nil, errors.Wrapf(err, "error creating lockfile for new container")
	}
	ctr.lock = lock

	return ctr, nil
}

// Create container root filesystem for use
func (c *Container) setupStorage(ctx context.Context) error {
	if !c.valid {
		return errors.Wrapf(ErrCtrRemoved, "container %s is not valid", c.ID())
	}

	if c.state.State != ContainerStateConfigured {
		return errors.Wrapf(ErrCtrStateInvalid, "container %s must be in Configured state to have storage set up", c.ID())
	}

	// Need both an image ID and image name, plus a bool telling us whether to use the image configuration
	if c.config.Rootfs == "" && (c.config.RootfsImageID == "" || c.config.RootfsImageName == "") {
		return errors.Wrapf(ErrInvalidArg, "must provide image ID and image name to use an image")
	}

	var options *storage.ContainerOptions
	if c.config.Rootfs == "" {
		options = &storage.ContainerOptions{c.config.IDMappings}

	}
	containerInfo, err := c.runtime.storageService.CreateContainerStorage(ctx, c.runtime.imageContext, c.config.RootfsImageName, c.config.RootfsImageID, c.config.Name, c.config.ID, c.config.MountLabel, options)
	if err != nil {
		return errors.Wrapf(err, "error creating container storage")
	}

	if !rootless.IsRootless() && (len(c.config.IDMappings.UIDMap) != 0 || len(c.config.IDMappings.GIDMap) != 0) {
		info, err := os.Stat(c.runtime.config.TmpDir)
		if err != nil {
			return errors.Wrapf(err, "cannot stat `%s`", c.runtime.config.TmpDir)
		}
		if err := os.Chmod(c.runtime.config.TmpDir, info.Mode()|0111); err != nil {
			return errors.Wrapf(err, "cannot chmod `%s`", c.runtime.config.TmpDir)
		}
		root := filepath.Join(c.runtime.config.TmpDir, "containers-root", c.ID())
		if err := os.MkdirAll(root, 0755); err != nil {
			return errors.Wrapf(err, "error creating userNS tmpdir for container %s", c.ID())
		}
		if err := os.Chown(root, c.RootUID(), c.RootGID()); err != nil {
			return err
		}
		c.state.UserNSRoot, err = filepath.EvalSymlinks(root)
		if err != nil {
			return errors.Wrapf(err, "failed to eval symlinks for %s", root)
		}
	}

	c.config.StaticDir = containerInfo.Dir
	c.state.RunDir = containerInfo.RunDir
	c.state.DestinationRunDir = c.state.RunDir
	if c.state.UserNSRoot != "" {
		c.state.DestinationRunDir = filepath.Join(c.state.UserNSRoot, "rundir")
	}

	// Set the default Entrypoint and Command
	if c.config.Entrypoint == nil {
		c.config.Entrypoint = containerInfo.Config.Config.Entrypoint
	}
	if c.config.Command == nil {
		c.config.Command = containerInfo.Config.Config.Cmd
	}

	artifacts := filepath.Join(c.config.StaticDir, artifactsDir)
	if err := os.MkdirAll(artifacts, 0755); err != nil {
		return errors.Wrapf(err, "error creating artifacts directory %q", artifacts)
	}

	return nil
}

// Tear down a container's storage prior to removal
func (c *Container) teardownStorage() error {
	if c.state.State == ContainerStateRunning || c.state.State == ContainerStatePaused {
		return errors.Wrapf(ErrCtrStateInvalid, "cannot remove storage for container %s as it is running or paused", c.ID())
	}

	artifacts := filepath.Join(c.config.StaticDir, artifactsDir)
	if err := os.RemoveAll(artifacts); err != nil {
		return errors.Wrapf(err, "error removing artifacts %q", artifacts)
	}

	if err := c.cleanupStorage(); err != nil {
		return errors.Wrapf(err, "failed to cleanup container %s storage", c.ID())
	}

	if c.state.UserNSRoot != "" {
		if err := os.RemoveAll(c.state.UserNSRoot); err != nil {
			return errors.Wrapf(err, "error removing userns root %q", c.state.UserNSRoot)
		}
	}

	if err := c.runtime.storageService.DeleteContainer(c.ID()); err != nil {
		// If the container has already been removed, warn but do not
		// error - we wanted it gone, it is already gone.
		// Potentially another tool using containers/storage already
		// removed it?
		if err == storage.ErrNotAContainer || err == storage.ErrContainerUnknown {
			logrus.Warnf("Storage for container %s already removed", c.ID())
			return nil
		}

		return errors.Wrapf(err, "error removing container %s root filesystem", c.ID())
	}

	return nil
}

// Reset resets state fields to default values
// It is performed before a refresh and clears the state after a reboot
// It does not save the results - assumes the database will do that for us
func resetState(state *containerState) error {
	state.PID = 0
	state.Mountpoint = ""
	state.Mounted = false
	state.State = ContainerStateConfigured
	state.ExecSessions = make(map[string]*ExecSession)
	state.IPs = nil
	state.Interfaces = nil
	state.Routes = nil
	state.BindMounts = make(map[string]string)
	state.CgroupCreated = false

	return nil
}

// Refresh refreshes the container's state after a restart
func (c *Container) refresh() error {
	if !c.valid {
		return errors.Wrapf(ErrCtrRemoved, "container %s is not valid - may have been removed", c.ID())
	}

	// We need to get the container's temporary directory from c/storage
	// It was lost in the reboot and must be recreated
	dir, err := c.runtime.storageService.GetRunDir(c.ID())
	if err != nil {
		return errors.Wrapf(err, "error retrieving temporary directory for container %s", c.ID())
	}

	if len(c.config.IDMappings.UIDMap) != 0 || len(c.config.IDMappings.GIDMap) != 0 {
		info, err := os.Stat(c.runtime.config.TmpDir)
		if err != nil {
			return errors.Wrapf(err, "cannot stat `%s`", c.runtime.config.TmpDir)
		}
		if err := os.Chmod(c.runtime.config.TmpDir, info.Mode()|0111); err != nil {
			return errors.Wrapf(err, "cannot chmod `%s`", c.runtime.config.TmpDir)
		}
		root := filepath.Join(c.runtime.config.TmpDir, "containers-root", c.ID())
		if err := os.MkdirAll(root, 0755); err != nil {
			return errors.Wrapf(err, "error creating userNS tmpdir for container %s", c.ID())
		}
		if err := os.Chown(root, c.RootUID(), c.RootGID()); err != nil {
			return err
		}
		c.state.UserNSRoot, err = filepath.EvalSymlinks(root)
		if err != nil {
			return errors.Wrapf(err, "failed to eval symlinks for %s", root)
		}
	}

	c.state.RunDir = dir
	c.state.DestinationRunDir = c.state.RunDir
	if c.state.UserNSRoot != "" {
		c.state.DestinationRunDir = filepath.Join(c.state.UserNSRoot, "rundir")
	}

	if err := c.save(); err != nil {
		return errors.Wrapf(err, "error refreshing state for container %s", c.ID())
	}

	// Remove ctl and attach files, which may persist across reboot
	if err := c.removeConmonFiles(); err != nil {
		return err
	}

	return nil
}

// Remove conmon attach socket and terminal resize FIFO
// This is necessary for restarting containers
func (c *Container) removeConmonFiles() error {
	// Files are allowed to not exist, so ignore ENOENT
	attachFile := filepath.Join(c.bundlePath(), "attach")
	if err := os.Remove(attachFile); err != nil && !os.IsNotExist(err) {
		return errors.Wrapf(err, "error removing container %s attach file", c.ID())
	}

	ctlFile := filepath.Join(c.bundlePath(), "ctl")
	if err := os.Remove(ctlFile); err != nil && !os.IsNotExist(err) {
		return errors.Wrapf(err, "error removing container %s ctl file", c.ID())
	}

	oomFile := filepath.Join(c.bundlePath(), "oom")
	if err := os.Remove(oomFile); err != nil && !os.IsNotExist(err) {
		return errors.Wrapf(err, "error removing container %s OOM file", c.ID())
	}

	exitFile := filepath.Join(c.runtime.ociRuntime.exitsDir, c.ID())
	if err := os.Remove(exitFile); err != nil && !os.IsNotExist(err) {
		return errors.Wrapf(err, "error removing container %s exit file", c.ID())
	}

	return nil
}

func (c *Container) export(path string) error {
	mountPoint := c.state.Mountpoint
	if !c.state.Mounted {
		mount, err := c.runtime.store.Mount(c.ID(), c.config.MountLabel)
		if err != nil {
			return errors.Wrapf(err, "error mounting container %q", c.ID())
		}
		mountPoint = mount
		defer func() {
			if err := c.runtime.store.Unmount(c.ID()); err != nil {
				logrus.Errorf("error unmounting container %q: %v", c.ID(), err)
			}
		}()
	}

	input, err := archive.Tar(mountPoint, archive.Uncompressed)
	if err != nil {
		return errors.Wrapf(err, "error reading container directory %q", c.ID())
	}

	outFile, err := os.Create(path)
	if err != nil {
		return errors.Wrapf(err, "error creating file %q", path)
	}
	defer outFile.Close()

	_, err = io.Copy(outFile, input)
	return err
}

// Get path of artifact with a given name for this container
func (c *Container) getArtifactPath(name string) string {
	return filepath.Join(c.config.StaticDir, artifactsDir, name)
}

// Used with Wait() to determine if a container has exited
func (c *Container) isStopped() (bool, error) {
	if !c.batched {
		c.lock.Lock()
		defer c.lock.Unlock()
	}
	err := c.syncContainer()
	if err != nil {
		return true, err
	}
	return c.state.State == ContainerStateStopped, nil
}

// save container state to the database
func (c *Container) save() error {
	if err := c.runtime.state.SaveContainer(c); err != nil {
		return errors.Wrapf(err, "error saving container %s state", c.ID())
	}
	return nil
}

// Check if a container's dependencies are running
// Returns a []string containing the IDs of dependencies that are not running
func (c *Container) checkDependenciesRunning() ([]string, error) {
	deps := c.Dependencies()
	notRunning := []string{}

	// We were not passed a set of dependency containers
	// Make it ourselves
	depCtrs := make(map[string]*Container, len(deps))
	for _, dep := range deps {
		// Get the dependency container
		depCtr, err := c.runtime.state.Container(dep)
		if err != nil {
			return nil, errors.Wrapf(err, "error retrieving dependency %s of container %s from state", dep, c.ID())
		}

		// Check the status
		state, err := depCtr.State()
		if err != nil {
			return nil, errors.Wrapf(err, "error retrieving state of dependency %s of container %s", dep, c.ID())
		}
		if state != ContainerStateRunning {
			notRunning = append(notRunning, dep)
		}
		depCtrs[dep] = depCtr
	}

	return notRunning, nil
}

// Check if a container's dependencies are running
// Returns a []string containing the IDs of dependencies that are not running
// Assumes depencies are already locked, and will be passed in
// Accepts a map[string]*Container containing, at a minimum, the locked
// dependency containers
// (This must be a map from container ID to container)
func (c *Container) checkDependenciesRunningLocked(depCtrs map[string]*Container) ([]string, error) {
	deps := c.Dependencies()
	notRunning := []string{}

	for _, dep := range deps {
		depCtr, ok := depCtrs[dep]
		if !ok {
			return nil, errors.Wrapf(ErrNoSuchCtr, "container %s depends on container %s but it is not on containers passed to checkDependenciesRunning", c.ID(), dep)
		}

		if err := c.syncContainer(); err != nil {
			return nil, err
		}

		if depCtr.state.State != ContainerStateRunning {
			notRunning = append(notRunning, dep)
		}
	}

	return notRunning, nil
}

func (c *Container) completeNetworkSetup() error {
	if !c.config.PostConfigureNetNS {
		return nil
	}
	if rootless.IsRootless() {
		return nil
	}
	if err := c.syncContainer(); err != nil {
		return err
	}
	return c.runtime.setupNetNS(c)
}

// Initialize a container, creating it in the runtime
func (c *Container) init(ctx context.Context) error {
	if err := c.makeBindMounts(); err != nil {
		return err
	}

	// Generate the OCI spec
	spec, err := c.generateSpec(ctx)
	if err != nil {
		return err
	}

	// Save the OCI spec to disk
	if err := c.saveSpec(spec); err != nil {
		return err
	}

	// With the spec complete, do an OCI create
	if err := c.runtime.ociRuntime.createContainer(c, c.config.CgroupParent); err != nil {
		return err
	}

	logrus.Debugf("Created container %s in OCI runtime", c.ID())

	c.state.State = ContainerStateCreated
	c.state.CgroupCreated = true

	if err := c.save(); err != nil {
		return err
	}

	return c.completeNetworkSetup()
}

// Reinitialize a container
// Deletes and recreates a container in the runtime
// Should only be done on ContainerStateStopped containers
func (c *Container) reinit(ctx context.Context) error {
	logrus.Debugf("Recreating container %s in OCI runtime", c.ID())

	// If necessary, delete attach and ctl files
	if err := c.removeConmonFiles(); err != nil {
		return err
	}

	if err := c.delete(ctx); err != nil {
		return err
	}

	// Our state is now Configured, as we've removed ourself from
	// the runtime
	// Set and save now to make sure that, if the init() below fails
	// we still have a valid state
	c.state.State = ContainerStateConfigured
	if err := c.save(); err != nil {
		return err
	}

	logrus.Debugf("Successfully cleaned up container %s", c.ID())

	// Initialize the container again
	return c.init(ctx)
}

// Initialize (if necessary) and start a container
// Performs all necessary steps to start a container that is not running
// Does not lock or check validity
func (c *Container) initAndStart(ctx context.Context) (err error) {
	// If we are ContainerStateUnknown, throw an error
	if c.state.State == ContainerStateUnknown {
		return errors.Wrapf(ErrCtrStateInvalid, "container %s is in an unknown state", c.ID())
	}

	// If we are running, do nothing
	if c.state.State == ContainerStateRunning {
		return nil
	}
	// If we are paused, throw an error
	if c.state.State == ContainerStatePaused {
		return errors.Wrapf(ErrCtrStateInvalid, "cannot start paused container %s", c.ID())
	}

	if err := c.prepare(); err != nil {
		return err
	}
	defer func() {
		if err != nil {
			if err2 := c.cleanup(); err2 != nil {
				logrus.Errorf("error cleaning up container %s: %v", c.ID(), err2)
			}
		}
	}()

	// If we are ContainerStateStopped we need to remove from runtime
	// And reset to ContainerStateConfigured
	if c.state.State == ContainerStateStopped {
		logrus.Debugf("Recreating container %s in OCI runtime", c.ID())

		// If necessary, delete attach and ctl files
		if err := c.removeConmonFiles(); err != nil {
			return err
		}

		// Delete the container in the runtime
		if err := c.runtime.ociRuntime.deleteContainer(c); err != nil {
			return errors.Wrapf(err, "error removing container %s from runtime", c.ID())
		}

		// Our state is now Configured, as we've removed ourself from
		// the runtime
		// Set and save now to make sure that, if the init() below fails
		// we still have a valid state
		c.state.State = ContainerStateConfigured
		if err := c.save(); err != nil {
			return err
		}
	}

	// If we are ContainerStateConfigured we need to init()
	if c.state.State == ContainerStateConfigured {
		if err := c.init(ctx); err != nil {
			return err
		}
	}

	// Now start the container
	return c.start()
}

// Internal, non-locking function to start a container
func (c *Container) start() error {
	if err := c.runtime.ociRuntime.startContainer(c); err != nil {
		return err
	}
	logrus.Debugf("Started container %s", c.ID())

	c.state.State = ContainerStateRunning

	return c.save()
}

// Internal, non-locking function to stop container
func (c *Container) stop(timeout uint) error {
	logrus.Debugf("Stopping ctr %s with timeout %d", c.ID(), timeout)

	if err := c.runtime.ociRuntime.stopContainer(c, timeout); err != nil {
		return err
	}

	// Sync the container's state to pick up return code
	if err := c.runtime.ociRuntime.updateContainerStatus(c); err != nil {
		return err
	}

	// Container should clean itself up
	return nil
}

// Internal, non-locking function to pause a container
func (c *Container) pause() error {
	if err := c.runtime.ociRuntime.pauseContainer(c); err != nil {
		return err
	}

	logrus.Debugf("Paused container %s", c.ID())

	c.state.State = ContainerStatePaused

	return c.save()
}

// Internal, non-locking function to unpause a container
func (c *Container) unpause() error {
	if err := c.runtime.ociRuntime.unpauseContainer(c); err != nil {
		return err
	}

	logrus.Debugf("Unpaused container %s", c.ID())

	c.state.State = ContainerStateRunning

	return c.save()
}

// mountStorage sets up the container's root filesystem
// It mounts the image and any other requested mounts
// TODO: Add ability to override mount label so we can use this for Mount() too
// TODO: Can we use this for export? Copying SHM into the export might not be
// good
func (c *Container) mountStorage() (err error) {
	// Container already mounted, nothing to do
	if c.state.Mounted {
		return nil
	}

	if !rootless.IsRootless() {
		// TODO: generalize this mount code so it will mount every mount in ctr.config.Mounts
		mounted, err := mount.Mounted(c.config.ShmDir)
		if err != nil {
			return errors.Wrapf(err, "unable to determine if %q is mounted", c.config.ShmDir)
		}

		if err := os.Chown(c.config.ShmDir, c.RootUID(), c.RootGID()); err != nil {
			return errors.Wrapf(err, "failed to chown %s", c.config.ShmDir)
		}

		if !mounted {
			shmOptions := fmt.Sprintf("mode=1777,size=%d", c.config.ShmSize)
			if err := unix.Mount("shm", c.config.ShmDir, "tmpfs", unix.MS_NOEXEC|unix.MS_NOSUID|unix.MS_NODEV,
				label.FormatMountLabel(shmOptions, c.config.MountLabel)); err != nil {
				return errors.Wrapf(err, "failed to mount shm tmpfs %q", c.config.ShmDir)
			}
			if err := os.Chown(c.config.ShmDir, c.RootUID(), c.RootGID()); err != nil {
				return errors.Wrapf(err, "failed to chown %s", c.config.ShmDir)
			}
		}
	}

	mountPoint := c.config.Rootfs
	if mountPoint == "" {
		mountPoint, err = c.runtime.storageService.MountContainerImage(c.ID())
		if err != nil {
			return errors.Wrapf(err, "error mounting storage for container %s", c.ID())
		}
	}
	c.state.Mounted = true
	c.state.Mountpoint = mountPoint
	if c.state.UserNSRoot == "" {
		c.state.RealMountpoint = c.state.Mountpoint
	} else {
		c.state.RealMountpoint = filepath.Join(c.state.UserNSRoot, "mountpoint")
	}

	logrus.Debugf("Created root filesystem for container %s at %s", c.ID(), c.state.Mountpoint)

	defer func() {
		if err != nil {
			if err2 := c.cleanupStorage(); err2 != nil {
				logrus.Errorf("Error unmounting storage for container %s: %v", c.ID(), err)
			}
		}
	}()

	return c.save()
}

// prepare mounts the container and sets up other required resources like net
// namespaces
func (c *Container) prepare() (err error) {
	// Mount storage if not mounted
	if err := c.mountStorage(); err != nil {
		return err
	}

	// Set up network namespace if not already set up
	if c.config.CreateNetNS && c.state.NetNS == nil && !c.config.PostConfigureNetNS {
		if err := c.runtime.createNetNS(c); err != nil {
			// Tear down storage before exiting to make sure we
			// don't leak mounts
			if err2 := c.cleanupStorage(); err2 != nil {
				logrus.Errorf("Error cleaning up storage for container %s: %v", c.ID(), err2)
			}
			return err
		}
	}

	return nil
}

// cleanupNetwork unmounts and cleans up the container's network
func (c *Container) cleanupNetwork() error {
	if c.state.NetNS == nil {
		logrus.Debugf("Network is already cleaned up, skipping...")
		return nil
	}

	// Stop the container's network namespace (if it has one)
	if err := c.runtime.teardownNetNS(c); err != nil {
		logrus.Errorf("unable to cleanup network for container %s: %q", c.ID(), err)
	}

	c.state.NetNS = nil
	c.state.IPs = nil
	c.state.Interfaces = nil
	c.state.Routes = nil

	if c.valid {
		return c.save()
	}

	return nil
}

// cleanupStorage unmounts and cleans up the container's root filesystem
func (c *Container) cleanupStorage() error {
	if !c.state.Mounted {
		// Already unmounted, do nothing
		logrus.Debugf("Storage is already unmounted, skipping...")
		return nil
	}

	for _, mount := range c.config.Mounts {
		if err := unix.Unmount(mount, unix.MNT_DETACH); err != nil {
			if err != syscall.EINVAL {
				logrus.Warnf("container %s failed to unmount %s : %v", c.ID(), mount, err)
			}
		}
	}
	if c.config.Rootfs != "" {
		return nil
	}

	// Also unmount storage
	if err := c.runtime.storageService.UnmountContainerImage(c.ID()); err != nil {
		// If the container has already been removed, warn but don't
		// error
		// We still want to be able to kick the container out of the
		// state
		if err == storage.ErrNotAContainer || err == storage.ErrContainerUnknown {
			logrus.Errorf("Storage for container %s has been removed", c.ID())
			return nil
		}

		return errors.Wrapf(err, "error unmounting container %s root filesystem", c.ID())
	}

	c.state.Mountpoint = ""
	c.state.Mounted = false

	if c.valid {
		return c.save()
	}
	return nil
}

// Unmount the a container and free its resources
func (c *Container) cleanup() error {
	var lastError error

	logrus.Debugf("Cleaning up container %s", c.ID())

	// Clean up network namespace, if present
	if err := c.cleanupNetwork(); err != nil {
		lastError = err
	}

	if err := c.cleanupCgroups(); err != nil {
		/*
			if lastError != nil {
				logrus.Errorf("Error cleaning up container %s CGroups: %v", c.ID(), err)
			} else {
				lastError = err
			}
		*/
		// For now we are going to only warn on failures to clean up cgroups
		// We have a conflict with running podman containers cleanup in same cgroup as container
		logrus.Warnf("Ignoring Error cleaning up container %s CGroups: %v", c.ID(), err)

	}

	// Unmount storage
	if err := c.cleanupStorage(); err != nil {
		if lastError != nil {
			logrus.Errorf("Error unmounting container %s storage: %v", c.ID(), err)
		} else {
			lastError = err
		}
	}

	return lastError
}

// delete deletes the container and runs any configured poststop
// hooks.
func (c *Container) delete(ctx context.Context) (err error) {
	if err := c.runtime.ociRuntime.deleteContainer(c); err != nil {
		return errors.Wrapf(err, "error removing container %s from runtime", c.ID())
	}

	if err := c.postDeleteHooks(ctx); err != nil {
		return errors.Wrapf(err, "container %s poststop hooks", c.ID())
	}

	return nil
}

// postDeleteHooks runs the poststop hooks (if any) as specified by
// the OCI Runtime Specification (which requires them to run
// post-delete, despite the stage name).
func (c *Container) postDeleteHooks(ctx context.Context) (err error) {
	if c.state.ExtensionStageHooks != nil {
		extensionHooks, ok := c.state.ExtensionStageHooks["poststop"]
		if ok {
			state, err := json.Marshal(spec.State{
				Version:     spec.Version,
				ID:          c.ID(),
				Status:      "stopped",
				Bundle:      c.bundlePath(),
				Annotations: c.config.Spec.Annotations,
			})
			if err != nil {
				return err
			}
			for i, hook := range extensionHooks {
				logrus.Debugf("container %s: invoke poststop hook %d, path %s", c.ID(), i, hook.Path)
				var stderr, stdout bytes.Buffer
				hookErr, err := exec.Run(ctx, &hook, state, &stdout, &stderr, exec.DefaultPostKillTimeout)
				if err != nil {
					logrus.Warnf("container %s: poststop hook %d: %v", c.ID(), i, err)
					if hookErr != err {
						logrus.Debugf("container %s: poststop hook %d (hook error): %v", c.ID(), i, hookErr)
					}
					stdoutString := stdout.String()
					if stdoutString != "" {
						logrus.Debugf("container %s: poststop hook %d: stdout:\n%s", c.ID(), i, stdoutString)
					}
					stderrString := stderr.String()
					if stderrString != "" {
						logrus.Debugf("container %s: poststop hook %d: stderr:\n%s", c.ID(), i, stderrString)
					}
				}
			}
		}
	}

	return nil
}

// Make standard bind mounts to include in the container
func (c *Container) makeBindMounts() error {
	if err := os.Chown(c.state.RunDir, c.RootUID(), c.RootGID()); err != nil {
		return errors.Wrapf(err, "cannot chown run directory %s", c.state.RunDir)
	}

	if c.state.BindMounts == nil {
		c.state.BindMounts = make(map[string]string)
	}

	// SHM is always added when we mount the container
	c.state.BindMounts["/dev/shm"] = c.config.ShmDir

	// Make /etc/resolv.conf
	if _, ok := c.state.BindMounts["/etc/resolv.conf"]; ok {
		// If it already exists, delete so we can recreate
		delete(c.state.BindMounts, "/etc/resolv.conf")
	}
	newResolv, err := c.generateResolvConf()
	if err != nil {
		return errors.Wrapf(err, "error creating resolv.conf for container %s", c.ID())
	}
	c.state.BindMounts["/etc/resolv.conf"] = newResolv

	// Make /etc/hosts
	if _, ok := c.state.BindMounts["/etc/hosts"]; ok {
		// If it already exists, delete so we can recreate
		delete(c.state.BindMounts, "/etc/hosts")
	}
	newHosts, err := c.generateHosts()
	if err != nil {
		return errors.Wrapf(err, "error creating hosts file for container %s", c.ID())
	}
	c.state.BindMounts["/etc/hosts"] = newHosts

	// Make /etc/hostname
	// This should never change, so no need to recreate if it exists
	if _, ok := c.state.BindMounts["/etc/hostname"]; !ok {
		hostnamePath, err := c.writeStringToRundir("hostname", c.Hostname())
		if err != nil {
			return errors.Wrapf(err, "error creating hostname file for container %s", c.ID())
		}
		c.state.BindMounts["/etc/hostname"] = hostnamePath
	}

	// Make .containerenv
	// Empty file, so no need to recreate if it exists
	if _, ok := c.state.BindMounts["/run/.containerenv"]; !ok {
		// Empty string for now, but we may consider populating this later
		containerenvPath, err := c.writeStringToRundir(".containerenv", "")
		if err != nil {
			return errors.Wrapf(err, "error creating containerenv file for container %s", c.ID())
		}
		c.state.BindMounts["/run/.containerenv"] = containerenvPath
	}

	// Add Secret Mounts
	secretMounts := secrets.SecretMountsWithUIDGID(c.config.MountLabel, c.state.RunDir, c.runtime.config.DefaultMountsFile, c.state.DestinationRunDir, c.RootUID(), c.RootGID())
	for _, mount := range secretMounts {
		if _, ok := c.state.BindMounts[mount.Destination]; !ok {
			c.state.BindMounts[mount.Destination] = mount.Source
		}
	}

	return nil
}

// writeStringToRundir copies the provided file to the runtimedir
func (c *Container) writeStringToRundir(destFile, output string) (string, error) {
	destFileName := filepath.Join(c.state.RunDir, destFile)

	if err := os.Remove(destFileName); err != nil && !os.IsNotExist(err) {
		return "", errors.Wrapf(err, "error removing %s for container %s", destFile, c.ID())
	}

	f, err := os.Create(destFileName)
	if err != nil {
		return "", errors.Wrapf(err, "unable to create %s", destFileName)
	}
	defer f.Close()
	if err := f.Chown(c.RootUID(), c.RootGID()); err != nil {
		return "", err
	}

	if _, err := f.WriteString(output); err != nil {
		return "", errors.Wrapf(err, "unable to write %s", destFileName)
	}
	// Relabel runDirResolv for the container
	if err := label.Relabel(destFileName, c.config.MountLabel, false); err != nil {
		return "", err
	}

	return filepath.Join(c.state.DestinationRunDir, destFile), nil
}

type resolvConf struct {
	nameServers   []string
	searchDomains []string
	options       []string
}

// generateResolvConf generates a containers resolv.conf
func (c *Container) generateResolvConf() (string, error) {
	// Copy /etc/resolv.conf to the container's rundir
	resolvPath := "/etc/resolv.conf"

	// Check if the host system is using system resolve and if so
	// copy its resolv.conf
	if _, err := os.Stat("/run/systemd/resolve/resolv.conf"); err == nil {
		resolvPath = "/run/systemd/resolve/resolv.conf"
	}
	orig, err := ioutil.ReadFile(resolvPath)
	if err != nil {
		return "", errors.Wrapf(err, "unable to read %s", resolvPath)
	}
	if len(c.config.DNSServer) == 0 && len(c.config.DNSSearch) == 0 && len(c.config.DNSOption) == 0 {
		return c.writeStringToRundir("resolv.conf", fmt.Sprintf("%s", orig))
	}

	// Read and organize the hosts /etc/resolv.conf
	resolv := createResolv(string(orig[:]))

	// Populate the resolv struct with user's dns search domains
	if len(c.config.DNSSearch) > 0 {
		resolv.searchDomains = nil
		// The . character means the user doesnt want any search domains in the container
		if !util.StringInSlice(".", c.config.DNSSearch) {
			resolv.searchDomains = append(resolv.searchDomains, c.Config().DNSSearch...)
		}
	}

	// Populate the resolv struct with user's dns servers
	if len(c.config.DNSServer) > 0 {
		resolv.nameServers = nil
		for _, i := range c.config.DNSServer {
			resolv.nameServers = append(resolv.nameServers, i.String())
		}
	}

	// Populate the resolve struct with the users dns options
	if len(c.config.DNSOption) > 0 {
		resolv.options = nil
		resolv.options = append(resolv.options, c.Config().DNSOption...)
	}
	return c.writeStringToRundir("resolv.conf", resolv.ToString())
}

// createResolv creates a resolv struct from an input string
func createResolv(input string) resolvConf {
	var resolv resolvConf
	for _, line := range strings.Split(input, "\n") {
		if strings.HasPrefix(line, "search") {
			fields := strings.Fields(line)
			if len(fields) < 2 {
				logrus.Debugf("invalid resolv.conf line %s", line)
				continue
			}
			resolv.searchDomains = append(resolv.searchDomains, fields[1:]...)
		} else if strings.HasPrefix(line, "nameserver") {
			fields := strings.Fields(line)
			if len(fields) < 2 {
				logrus.Debugf("invalid resolv.conf line %s", line)
				continue
			}
			resolv.nameServers = append(resolv.nameServers, fields[1])
		} else if strings.HasPrefix(line, "options") {
			fields := strings.Fields(line)
			if len(fields) < 2 {
				logrus.Debugf("invalid resolv.conf line %s", line)
				continue
			}
			resolv.options = append(resolv.options, fields[1:]...)
		}
	}
	return resolv
}

//ToString returns a resolv struct in the form of a resolv.conf
func (r resolvConf) ToString() string {
	var result string
	// Populate the output string with search domains
	result += fmt.Sprintf("search %s\n", strings.Join(r.searchDomains, " "))
	// Populate the output string with name servers
	for _, i := range r.nameServers {
		result += fmt.Sprintf("nameserver %s\n", i)
	}
	// Populate the output string with dns options
	for _, i := range r.options {
		result += fmt.Sprintf("options %s\n", i)
	}
	return result
}

// generateHosts creates a containers hosts file
func (c *Container) generateHosts() (string, error) {
	orig, err := ioutil.ReadFile("/etc/hosts")
	if err != nil {
		return "", errors.Wrapf(err, "unable to read /etc/hosts")
	}
	hosts := string(orig)
	if len(c.config.HostAdd) > 0 {
		for _, host := range c.config.HostAdd {
			// the host format has already been verified at this point
			fields := strings.SplitN(host, ":", 2)
			hosts += fmt.Sprintf("%s %s\n", fields[1], fields[0])
		}
	}
	return c.writeStringToRundir("hosts", hosts)
}

// Generate spec for a container
// Accepts a map of the container's dependencies
func (c *Container) generateSpec(ctx context.Context) (*spec.Spec, error) {
	g := generate.NewFromSpec(c.config.Spec)

	// If network namespace was requested, add it now
	if c.config.CreateNetNS {
		if c.config.PostConfigureNetNS {
			g.AddOrReplaceLinuxNamespace(spec.NetworkNamespace, "")
		} else {
			g.AddOrReplaceLinuxNamespace(spec.NetworkNamespace, c.state.NetNS.Path())
		}
	}

	// Remove the default /dev/shm mount to ensure we overwrite it
	g.RemoveMount("/dev/shm")

	// Add bind mounts to container
	for dstPath, srcPath := range c.state.BindMounts {
		newMount := spec.Mount{
			Type:        "bind",
			Source:      srcPath,
			Destination: dstPath,
			Options:     []string{"rw", "bind"},
		}
		if !MountExists(g.Mounts(), dstPath) {
			g.AddMount(newMount)
		} else {
			logrus.Warnf("User mount overriding libpod mount at %q", dstPath)
		}
	}

	var err error
	if !rootless.IsRootless() {
		if c.state.ExtensionStageHooks, err = c.setupOCIHooks(ctx, g.Config); err != nil {
			return nil, errors.Wrapf(err, "error setting up OCI Hooks")
		}
	}

	// Bind builtin image volumes
	if c.config.Rootfs == "" && c.config.ImageVolumes {
		if err := c.addImageVolumes(ctx, &g); err != nil {
			return nil, errors.Wrapf(err, "error mounting image volumes")
		}
	}

	if c.config.User != "" {
		if !c.state.Mounted {
			return nil, errors.Wrapf(ErrCtrStateInvalid, "container %s must be mounted in order to translate User field", c.ID())
		}
		uid, gid, err := chrootuser.GetUser(c.state.Mountpoint, c.config.User)
		if err != nil {
			return nil, err
		}
		// User and Group must go together
		g.SetProcessUID(uid)
		g.SetProcessGID(gid)
	}

	// Add addition groups if c.config.GroupAdd is not empty
	if len(c.config.Groups) > 0 {
		if !c.state.Mounted {
			return nil, errors.Wrapf(ErrCtrStateInvalid, "container %s must be mounted in order to add additional groups", c.ID())
		}
		for _, group := range c.config.Groups {
			gid, err := chrootuser.GetGroup(c.state.Mountpoint, group)
			if err != nil {
				return nil, err
			}
			g.AddProcessAdditionalGid(gid)
		}
	}

	// Look up and add groups the user belongs to, if a group wasn't directly specified
	if !rootless.IsRootless() && !strings.Contains(c.config.User, ":") {
		groups, err := chrootuser.GetAdditionalGroupsForUser(c.state.Mountpoint, uint64(g.Config.Process.User.UID))
		if err != nil && errors.Cause(err) != chrootuser.ErrNoSuchUser {
			return nil, err
		}
		for _, gid := range groups {
			g.AddProcessAdditionalGid(gid)
		}
	}

	// Add shared namespaces from other containers
	if c.config.IPCNsCtr != "" {
		if err := c.addNamespaceContainer(&g, IPCNS, c.config.IPCNsCtr, spec.IPCNamespace); err != nil {
			return nil, err
		}
	}
	if c.config.MountNsCtr != "" {
		if err := c.addNamespaceContainer(&g, MountNS, c.config.MountNsCtr, spec.MountNamespace); err != nil {
			return nil, err
		}
	}
	if c.config.NetNsCtr != "" {
		if err := c.addNamespaceContainer(&g, NetNS, c.config.NetNsCtr, spec.NetworkNamespace); err != nil {
			return nil, err
		}
	}
	if c.config.PIDNsCtr != "" {
		if err := c.addNamespaceContainer(&g, PIDNS, c.config.PIDNsCtr, string(spec.PIDNamespace)); err != nil {
			return nil, err
		}
	}
	if c.config.UserNsCtr != "" {
		if err := c.addNamespaceContainer(&g, UserNS, c.config.UserNsCtr, spec.UserNamespace); err != nil {
			return nil, err
		}
	}
	if c.config.UTSNsCtr != "" {
		if err := c.addNamespaceContainer(&g, UTSNS, c.config.UTSNsCtr, spec.UTSNamespace); err != nil {
			return nil, err
		}
	}
	if c.config.CgroupNsCtr != "" {
		if err := c.addNamespaceContainer(&g, CgroupNS, c.config.CgroupNsCtr, spec.CgroupNamespace); err != nil {
			return nil, err
		}
	}

	if c.config.Rootfs == "" {
		if err := idtools.MkdirAllAs(c.state.RealMountpoint, 0700, c.RootUID(), c.RootGID()); err != nil {
			return nil, err
		}
	}

	g.SetRootPath(c.state.RealMountpoint)
	g.AddAnnotation(crioAnnotations.Created, c.config.CreatedTime.Format(time.RFC3339Nano))
	g.AddAnnotation("org.opencontainers.image.stopSignal", fmt.Sprintf("%d", c.config.StopSignal))

	g.SetHostname(c.Hostname())
	g.AddProcessEnv("HOSTNAME", g.Config.Hostname)

	// Only add container environment variable if not already present
	foundContainerEnv := false
	for _, env := range g.Config.Process.Env {
		if strings.HasPrefix(env, "container=") {
			foundContainerEnv = true
			break
		}
	}
	if !foundContainerEnv {
		g.AddProcessEnv("container", "libpod")
	}

	if rootless.IsRootless() {
		g.SetLinuxCgroupsPath("")
	} else if c.runtime.config.CgroupManager == SystemdCgroupsManager {
		// When runc is set to use Systemd as a cgroup manager, it
		// expects cgroups to be passed as follows:
		// slice:prefix:name
		systemdCgroups := fmt.Sprintf("%s:libpod:%s", path.Base(c.config.CgroupParent), c.ID())
		logrus.Debugf("Setting CGroups for container %s to %s", c.ID(), systemdCgroups)
		g.SetLinuxCgroupsPath(systemdCgroups)
	} else {
		cgroupPath, err := c.CGroupPath()
		if err != nil {
			return nil, err
		}
		logrus.Debugf("Setting CGroup path for container %s to %s", c.ID(), cgroupPath)
		g.SetLinuxCgroupsPath(cgroupPath)
	}

	return g.Config, nil
}

// Add an existing container's namespace to the spec
func (c *Container) addNamespaceContainer(g *generate.Generator, ns LinuxNS, ctr string, specNS string) error {
	nsCtr, err := c.runtime.state.Container(ctr)
	if err != nil {
		return errors.Wrapf(err, "error retrieving dependency %s of container %s from state", ctr, c.ID())
	}

	// TODO need unlocked version of this for use in pods
	nsPath, err := nsCtr.NamespacePath(ns)
	if err != nil {
		return err
	}

	if err := g.AddOrReplaceLinuxNamespace(specNS, nsPath); err != nil {
		return err
	}

	return nil
}

func (c *Container) addImageVolumes(ctx context.Context, g *generate.Generator) error {
	mountPoint := c.state.Mountpoint
	if !c.state.Mounted {
		return errors.Wrapf(ErrInternal, "container is not mounted")
	}
	newImage, err := c.runtime.imageRuntime.NewFromLocal(c.config.RootfsImageID)
	if err != nil {
		return err
	}
	imageData, err := newImage.Inspect(ctx)
	if err != nil {
		return err
	}
	for k := range imageData.ContainerConfig.Volumes {
		mount := spec.Mount{
			Destination: k,
			Type:        "bind",
			Options:     []string{"rbind", "rw"},
		}
		if MountExists(g.Mounts(), k) {
			continue
		}
		volumePath := filepath.Join(c.config.StaticDir, "volumes", k)
		srcPath := filepath.Join(mountPoint, k)

		var (
			uid uint32
			gid uint32
		)
		if c.config.User != "" {
			if !c.state.Mounted {
				return errors.Wrapf(ErrCtrStateInvalid, "container %s must be mounted in order to translate User field", c.ID())
			}
			uid, gid, err = chrootuser.GetUser(c.state.Mountpoint, c.config.User)
			if err != nil {
				return err
			}
		}

		if _, err := os.Stat(srcPath); os.IsNotExist(err) {
			logrus.Infof("Volume image mount point %s does not exist in root FS, need to create it", k)
			if err = os.MkdirAll(srcPath, 0755); err != nil {
				return errors.Wrapf(err, "error creating directory %q for volume %q in container %q", volumePath, k, c.ID)
			}

			if err = os.Chown(srcPath, int(uid), int(gid)); err != nil {
				return errors.Wrapf(err, "error chowning directory %q for volume %q in container %q", srcPath, k, c.ID)
			}
		}

		if _, err := os.Stat(volumePath); os.IsNotExist(err) {
			if err = os.MkdirAll(volumePath, 0755); err != nil {
				return errors.Wrapf(err, "error creating directory %q for volume %q in container %q", volumePath, k, c.ID)
			}

			if err = os.Chown(volumePath, int(uid), int(gid)); err != nil {
				return errors.Wrapf(err, "error chowning directory %q for volume %q in container %q", volumePath, k, c.ID)
			}

			if err = label.Relabel(volumePath, c.config.MountLabel, false); err != nil {
				return errors.Wrapf(err, "error relabeling directory %q for volume %q in container %q", volumePath, k, c.ID)
			}
			if err = chrootarchive.NewArchiver(nil).CopyWithTar(srcPath, volumePath); err != nil && !os.IsNotExist(err) {
				return errors.Wrapf(err, "error populating directory %q for volume %q in container %q using contents of %q", volumePath, k, c.ID, srcPath)
			}

			// Set the volume path with the same owner and permission of source path
			sstat, _ := os.Stat(srcPath)
			st, ok := sstat.Sys().(*syscall.Stat_t)
			if !ok {
				return fmt.Errorf("could not convert to syscall.Stat_t")
			}
			uid := int(st.Uid)
			gid := int(st.Gid)

			if err := os.Lchown(volumePath, uid, gid); err != nil {
				return err
			}
			if os.Chmod(volumePath, sstat.Mode()); err != nil {
				return err
			}

		}

		mount.Source = volumePath
		g.AddMount(mount)
	}
	return nil
}

// Save OCI spec to disk, replacing any existing specs for the container
func (c *Container) saveSpec(spec *spec.Spec) error {
	// If the OCI spec already exists, we need to replace it
	// Cannot guarantee some things, e.g. network namespaces, have the same
	// paths
	jsonPath := filepath.Join(c.bundlePath(), "config.json")
	if _, err := os.Stat(jsonPath); err != nil {
		if !os.IsNotExist(err) {
			return errors.Wrapf(err, "error doing stat on container %s spec", c.ID())
		}
		// The spec does not exist, we're fine
	} else {
		// The spec exists, need to remove it
		if err := os.Remove(jsonPath); err != nil {
			return errors.Wrapf(err, "error replacing runtime spec for container %s", c.ID())
		}
	}

	fileJSON, err := json.Marshal(spec)
	if err != nil {
		return errors.Wrapf(err, "error exporting runtime spec for container %s to JSON", c.ID())
	}
	if err := ioutil.WriteFile(jsonPath, fileJSON, 0644); err != nil {
		return errors.Wrapf(err, "error writing runtime spec JSON for container %s to disk", c.ID())
	}

	logrus.Debugf("Created OCI spec for container %s at %s", c.ID(), jsonPath)

	c.state.ConfigPath = jsonPath

	return nil
}

func (c *Container) setupOCIHooks(ctx context.Context, config *spec.Spec) (extensionStageHooks map[string][]spec.Hook, err error) {
	if c.runtime.config.HooksDir == "" {
		return nil, nil
	}

	var locale string
	var ok bool
	for _, envVar := range []string{
		"LC_ALL",
		"LC_COLLATE",
		"LANG",
	} {
		locale, ok = os.LookupEnv(envVar)
		if ok {
			break
		}
	}

	langString, ok := localeToLanguage[strings.ToLower(locale)]
	if !ok {
		langString = locale
	}

	lang, err := language.Parse(langString)
	if err != nil {
		logrus.Warnf("failed to parse language %q: %s", langString, err)
		lang, err = language.Parse("und-u-va-posix")
		if err != nil {
			return nil, err
		}
	}

	manager, err := hooks.New(ctx, []string{c.runtime.config.HooksDir}, []string{"poststop"}, lang)
	if err != nil {
		if c.runtime.config.HooksDirNotExistFatal || !os.IsNotExist(err) {
			return nil, err
		}
		logrus.Warnf("failed to load hooks: {}", err)
		return nil, nil
	}

	return manager.Hooks(config, c.Spec().Annotations, len(c.config.UserVolumes) > 0)
}