/
container.go
1176 lines (1066 loc) · 45.6 KB
/
container.go
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
// Copyright 2015 go-dockerclient authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package docker
import (
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"strconv"
"strings"
"time"
)
// ErrContainerAlreadyExists is the error returned by CreateContainer when the
// container already exists.
var ErrContainerAlreadyExists = errors.New("container already exists")
// ListContainersOptions specify parameters to the ListContainers function.
//
// See https://goo.gl/47a6tO for more details.
type ListContainersOptions struct {
All bool
Size bool
Limit int
Since string
Before string
Filters map[string][]string
}
// APIPort is a type that represents a port mapping returned by the Docker API
type APIPort struct {
PrivatePort int64 `json:"PrivatePort,omitempty" yaml:"PrivatePort,omitempty"`
PublicPort int64 `json:"PublicPort,omitempty" yaml:"PublicPort,omitempty"`
Type string `json:"Type,omitempty" yaml:"Type,omitempty"`
IP string `json:"IP,omitempty" yaml:"IP,omitempty"`
}
// APIContainers represents each container in the list returned by
// ListContainers.
type APIContainers struct {
ID string `json:"Id" yaml:"Id"`
Image string `json:"Image,omitempty" yaml:"Image,omitempty"`
Command string `json:"Command,omitempty" yaml:"Command,omitempty"`
Created int64 `json:"Created,omitempty" yaml:"Created,omitempty"`
Status string `json:"Status,omitempty" yaml:"Status,omitempty"`
Ports []APIPort `json:"Ports,omitempty" yaml:"Ports,omitempty"`
SizeRw int64 `json:"SizeRw,omitempty" yaml:"SizeRw,omitempty"`
SizeRootFs int64 `json:"SizeRootFs,omitempty" yaml:"SizeRootFs,omitempty"`
Names []string `json:"Names,omitempty" yaml:"Names,omitempty"`
Labels map[string]string `json:"Labels,omitempty" yaml:"Labels, omitempty"`
}
// ListContainers returns a slice of containers matching the given criteria.
//
// See https://goo.gl/47a6tO for more details.
func (c *Client) ListContainers(opts ListContainersOptions) ([]APIContainers, error) {
path := "/containers/json?" + queryString(opts)
resp, err := c.do("GET", path, doOptions{})
if err != nil {
return nil, err
}
defer resp.Body.Close()
var containers []APIContainers
if err := json.NewDecoder(resp.Body).Decode(&containers); err != nil {
return nil, err
}
return containers, nil
}
// Port represents the port number and the protocol, in the form
// <number>/<protocol>. For example: 80/tcp.
type Port string
// Port returns the number of the port.
func (p Port) Port() string {
return strings.Split(string(p), "/")[0]
}
// Proto returns the name of the protocol.
func (p Port) Proto() string {
parts := strings.Split(string(p), "/")
if len(parts) == 1 {
return "tcp"
}
return parts[1]
}
// State represents the state of a container.
type State struct {
Running bool `json:"Running,omitempty" yaml:"Running,omitempty"`
Paused bool `json:"Paused,omitempty" yaml:"Paused,omitempty"`
Restarting bool `json:"Restarting,omitempty" yaml:"Restarting,omitempty"`
OOMKilled bool `json:"OOMKilled,omitempty" yaml:"OOMKilled,omitempty"`
Pid int `json:"Pid,omitempty" yaml:"Pid,omitempty"`
ExitCode int `json:"ExitCode,omitempty" yaml:"ExitCode,omitempty"`
Error string `json:"Error,omitempty" yaml:"Error,omitempty"`
StartedAt time.Time `json:"StartedAt,omitempty" yaml:"StartedAt,omitempty"`
FinishedAt time.Time `json:"FinishedAt,omitempty" yaml:"FinishedAt,omitempty"`
}
// String returns the string representation of a state.
func (s *State) String() string {
if s.Running {
if s.Paused {
return "paused"
}
return fmt.Sprintf("Up %s", time.Now().UTC().Sub(s.StartedAt))
}
return fmt.Sprintf("Exit %d", s.ExitCode)
}
// PortBinding represents the host/container port mapping as returned in the
// `docker inspect` json
type PortBinding struct {
HostIP string `json:"HostIP,omitempty" yaml:"HostIP,omitempty"`
HostPort string `json:"HostPort,omitempty" yaml:"HostPort,omitempty"`
}
// PortMapping represents a deprecated field in the `docker inspect` output,
// and its value as found in NetworkSettings should always be nil
type PortMapping map[string]string
// ContainerNetwork represents the networking settings of a container per network.
type ContainerNetwork struct {
MacAddress string `json:"MacAddress,omitempty" yaml:"MacAddress,omitempty"`
GlobalIPv6PrefixLen int `json:"GlobalIPv6PrefixLen,omitempty" yaml:"GlobalIPv6PrefixLen,omitempty"`
GlobalIPv6Address string `json:"GlobalIPv6Address,omitempty" yaml:"GlobalIPv6Address,omitempty"`
IPv6Gateway string `json:"IPv6Gateway,omitempty" yaml:"IPv6Gateway,omitempty"`
IPPrefixLen int `json:"IPPrefixLen,omitempty" yaml:"IPPrefixLen,omitempty"`
IPAddress string `json:"IPAddress,omitempty" yaml:"IPAddress,omitempty"`
Gateway string `json:"Gateway,omitempty" yaml:"Gateway,omitempty"`
EndpointID string `json:"EndpointID,omitempty" yaml:"EndpointID,omitempty"`
}
// NetworkSettings contains network-related information about a container
type NetworkSettings struct {
Networks map[string]ContainerNetwork `json:"Networks,omitempty" yaml:"Networks,omitempty"`
IPAddress string `json:"IPAddress,omitempty" yaml:"IPAddress,omitempty"`
IPPrefixLen int `json:"IPPrefixLen,omitempty" yaml:"IPPrefixLen,omitempty"`
MacAddress string `json:"MacAddress,omitempty" yaml:"MacAddress,omitempty"`
Gateway string `json:"Gateway,omitempty" yaml:"Gateway,omitempty"`
Bridge string `json:"Bridge,omitempty" yaml:"Bridge,omitempty"`
PortMapping map[string]PortMapping `json:"PortMapping,omitempty" yaml:"PortMapping,omitempty"`
Ports map[Port][]PortBinding `json:"Ports,omitempty" yaml:"Ports,omitempty"`
NetworkID string `json:"NetworkID,omitempty" yaml:"NetworkID,omitempty"`
EndpointID string `json:"EndpointID,omitempty" yaml:"EndpointID,omitempty"`
SandboxKey string `json:"SandboxKey,omitempty" yaml:"SandboxKey,omitempty"`
GlobalIPv6Address string `json:"GlobalIPv6Address,omitempty" yaml:"GlobalIPv6Address,omitempty"`
GlobalIPv6PrefixLen int `json:"GlobalIPv6PrefixLen,omitempty" yaml:"GlobalIPv6PrefixLen,omitempty"`
IPv6Gateway string `json:"IPv6Gateway,omitempty" yaml:"IPv6Gateway,omitempty"`
LinkLocalIPv6Address string `json:"LinkLocalIPv6Address,omitempty" yaml:"LinkLocalIPv6Address,omitempty"`
LinkLocalIPv6PrefixLen int `json:"LinkLocalIPv6PrefixLen,omitempty" yaml:"LinkLocalIPv6PrefixLen,omitempty"`
SecondaryIPAddresses []string `json:"SecondaryIPAddresses,omitempty" yaml:"SecondaryIPAddresses,omitempty"`
SecondaryIPv6Addresses []string `json:"SecondaryIPv6Addresses,omitempty" yaml:"SecondaryIPv6Addresses,omitempty"`
}
// PortMappingAPI translates the port mappings as contained in NetworkSettings
// into the format in which they would appear when returned by the API
func (settings *NetworkSettings) PortMappingAPI() []APIPort {
var mapping []APIPort
for port, bindings := range settings.Ports {
p, _ := parsePort(port.Port())
if len(bindings) == 0 {
mapping = append(mapping, APIPort{
PrivatePort: int64(p),
Type: port.Proto(),
})
continue
}
for _, binding := range bindings {
p, _ := parsePort(port.Port())
h, _ := parsePort(binding.HostPort)
mapping = append(mapping, APIPort{
PrivatePort: int64(p),
PublicPort: int64(h),
Type: port.Proto(),
IP: binding.HostIP,
})
}
}
return mapping
}
func parsePort(rawPort string) (int, error) {
port, err := strconv.ParseUint(rawPort, 10, 16)
if err != nil {
return 0, err
}
return int(port), nil
}
// Config is the list of configuration options used when creating a container.
// Config does not contain the options that are specific to starting a container on a
// given host. Those are contained in HostConfig
type Config struct {
Hostname string `json:"Hostname,omitempty" yaml:"Hostname,omitempty"`
Domainname string `json:"Domainname,omitempty" yaml:"Domainname,omitempty"`
User string `json:"User,omitempty" yaml:"User,omitempty"`
Memory int64 `json:"Memory,omitempty" yaml:"Memory,omitempty"`
MemorySwap int64 `json:"MemorySwap,omitempty" yaml:"MemorySwap,omitempty"`
MemoryReservation int64 `json:"MemoryReservation,omitempty" yaml:"MemoryReservation,omitempty"`
KernelMemory int64 `json:"KernelMemory,omitempty" yaml:"KernelMemory,omitempty"`
CPUShares int64 `json:"CpuShares,omitempty" yaml:"CpuShares,omitempty"`
CPUSet string `json:"Cpuset,omitempty" yaml:"Cpuset,omitempty"`
AttachStdin bool `json:"AttachStdin,omitempty" yaml:"AttachStdin,omitempty"`
AttachStdout bool `json:"AttachStdout,omitempty" yaml:"AttachStdout,omitempty"`
AttachStderr bool `json:"AttachStderr,omitempty" yaml:"AttachStderr,omitempty"`
PortSpecs []string `json:"PortSpecs,omitempty" yaml:"PortSpecs,omitempty"`
ExposedPorts map[Port]struct{} `json:"ExposedPorts,omitempty" yaml:"ExposedPorts,omitempty"`
StopSignal string `json:"StopSignal,omitempty" yaml:"StopSignal,omitempty"`
Tty bool `json:"Tty,omitempty" yaml:"Tty,omitempty"`
OpenStdin bool `json:"OpenStdin,omitempty" yaml:"OpenStdin,omitempty"`
StdinOnce bool `json:"StdinOnce,omitempty" yaml:"StdinOnce,omitempty"`
Env []string `json:"Env,omitempty" yaml:"Env,omitempty"`
Cmd []string `json:"Cmd" yaml:"Cmd"`
DNS []string `json:"Dns,omitempty" yaml:"Dns,omitempty"` // For Docker API v1.9 and below only
Image string `json:"Image,omitempty" yaml:"Image,omitempty"`
Volumes map[string]struct{} `json:"Volumes,omitempty" yaml:"Volumes,omitempty"`
VolumeDriver string `json:"VolumeDriver,omitempty" yaml:"VolumeDriver,omitempty"`
VolumesFrom string `json:"VolumesFrom,omitempty" yaml:"VolumesFrom,omitempty"`
WorkingDir string `json:"WorkingDir,omitempty" yaml:"WorkingDir,omitempty"`
MacAddress string `json:"MacAddress,omitempty" yaml:"MacAddress,omitempty"`
Entrypoint []string `json:"Entrypoint" yaml:"Entrypoint"`
NetworkDisabled bool `json:"NetworkDisabled,omitempty" yaml:"NetworkDisabled,omitempty"`
SecurityOpts []string `json:"SecurityOpts,omitempty" yaml:"SecurityOpts,omitempty"`
OnBuild []string `json:"OnBuild,omitempty" yaml:"OnBuild,omitempty"`
Mounts []Mount `json:"Mounts,omitempty" yaml:"Mounts,omitempty"`
Labels map[string]string `json:"Labels,omitempty" yaml:"Labels,omitempty"`
}
// Mount represents a mount point in the container.
//
// It has been added in the version 1.20 of the Docker API, available since
// Docker 1.8.
type Mount struct {
Name string
Source string
Destination string
Driver string
Mode string
RW bool
}
// LogConfig defines the log driver type and the configuration for it.
type LogConfig struct {
Type string `json:"Type,omitempty" yaml:"Type,omitempty"`
Config map[string]string `json:"Config,omitempty" yaml:"Config,omitempty"`
}
// ULimit defines system-wide resource limitations
// This can help a lot in system administration, e.g. when a user starts too many processes and therefore makes the system unresponsive for other users.
type ULimit struct {
Name string `json:"Name,omitempty" yaml:"Name,omitempty"`
Soft int64 `json:"Soft,omitempty" yaml:"Soft,omitempty"`
Hard int64 `json:"Hard,omitempty" yaml:"Hard,omitempty"`
}
// SwarmNode containers information about which Swarm node the container is on
type SwarmNode struct {
ID string `json:"ID,omitempty" yaml:"ID,omitempty"`
IP string `json:"IP,omitempty" yaml:"IP,omitempty"`
Addr string `json:"Addr,omitempty" yaml:"Addr,omitempty"`
Name string `json:"Name,omitempty" yaml:"Name,omitempty"`
CPUs int64 `json:"CPUs,omitempty" yaml:"CPUs,omitempty"`
Memory int64 `json:"Memory,omitempty" yaml:"Memory,omitempty"`
Labels map[string]string `json:"Labels,omitempty" yaml:"Labels,omitempty"`
}
// Container is the type encompasing everything about a container - its config,
// hostconfig, etc.
type Container struct {
ID string `json:"Id" yaml:"Id"`
Created time.Time `json:"Created,omitempty" yaml:"Created,omitempty"`
Path string `json:"Path,omitempty" yaml:"Path,omitempty"`
Args []string `json:"Args,omitempty" yaml:"Args,omitempty"`
Config *Config `json:"Config,omitempty" yaml:"Config,omitempty"`
State State `json:"State,omitempty" yaml:"State,omitempty"`
Image string `json:"Image,omitempty" yaml:"Image,omitempty"`
Node *SwarmNode `json:"Node,omitempty" yaml:"Node,omitempty"`
NetworkSettings *NetworkSettings `json:"NetworkSettings,omitempty" yaml:"NetworkSettings,omitempty"`
SysInitPath string `json:"SysInitPath,omitempty" yaml:"SysInitPath,omitempty"`
ResolvConfPath string `json:"ResolvConfPath,omitempty" yaml:"ResolvConfPath,omitempty"`
HostnamePath string `json:"HostnamePath,omitempty" yaml:"HostnamePath,omitempty"`
HostsPath string `json:"HostsPath,omitempty" yaml:"HostsPath,omitempty"`
LogPath string `json:"LogPath,omitempty" yaml:"LogPath,omitempty"`
Name string `json:"Name,omitempty" yaml:"Name,omitempty"`
Driver string `json:"Driver,omitempty" yaml:"Driver,omitempty"`
Mounts []Mount `json:"Mounts,omitempty" yaml:"Mounts,omitempty"`
Volumes map[string]string `json:"Volumes,omitempty" yaml:"Volumes,omitempty"`
VolumesRW map[string]bool `json:"VolumesRW,omitempty" yaml:"VolumesRW,omitempty"`
HostConfig *HostConfig `json:"HostConfig,omitempty" yaml:"HostConfig,omitempty"`
ExecIDs []string `json:"ExecIDs,omitempty" yaml:"ExecIDs,omitempty"`
RestartCount int `json:"RestartCount,omitempty" yaml:"RestartCount,omitempty"`
AppArmorProfile string `json:"AppArmorProfile,omitempty" yaml:"AppArmorProfile,omitempty"`
}
// RenameContainerOptions specify parameters to the RenameContainer function.
//
// See https://goo.gl/laSOIy for more details.
type RenameContainerOptions struct {
// ID of container to rename
ID string `qs:"-"`
// New name
Name string `json:"name,omitempty" yaml:"name,omitempty"`
}
// RenameContainer updates and existing containers name
//
// See https://goo.gl/laSOIy for more details.
func (c *Client) RenameContainer(opts RenameContainerOptions) error {
resp, err := c.do("POST", fmt.Sprintf("/containers/"+opts.ID+"/rename?%s", queryString(opts)), doOptions{})
if err != nil {
return err
}
resp.Body.Close()
return nil
}
// InspectContainer returns information about a container by its ID.
//
// See https://goo.gl/RdIq0b for more details.
func (c *Client) InspectContainer(id string) (*Container, error) {
path := "/containers/" + id + "/json"
resp, err := c.do("GET", path, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return nil, &NoSuchContainer{ID: id}
}
return nil, err
}
defer resp.Body.Close()
var container Container
if err := json.NewDecoder(resp.Body).Decode(&container); err != nil {
return nil, err
}
return &container, nil
}
// ContainerChanges returns changes in the filesystem of the given container.
//
// See https://goo.gl/9GsTIF for more details.
func (c *Client) ContainerChanges(id string) ([]Change, error) {
path := "/containers/" + id + "/changes"
resp, err := c.do("GET", path, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return nil, &NoSuchContainer{ID: id}
}
return nil, err
}
defer resp.Body.Close()
var changes []Change
if err := json.NewDecoder(resp.Body).Decode(&changes); err != nil {
return nil, err
}
return changes, nil
}
// CreateContainerOptions specify parameters to the CreateContainer function.
//
// See https://goo.gl/WxQzrr for more details.
type CreateContainerOptions struct {
Name string
Config *Config `qs:"-"`
HostConfig *HostConfig `qs:"-"`
}
// CreateContainer creates a new container, returning the container instance,
// or an error in case of failure.
//
// See https://goo.gl/WxQzrr for more details.
func (c *Client) CreateContainer(opts CreateContainerOptions) (*Container, error) {
path := "/containers/create?" + queryString(opts)
resp, err := c.do(
"POST",
path,
doOptions{
data: struct {
*Config
HostConfig *HostConfig `json:"HostConfig,omitempty" yaml:"HostConfig,omitempty"`
}{
opts.Config,
opts.HostConfig,
},
},
)
if e, ok := err.(*Error); ok {
if e.Status == http.StatusNotFound {
return nil, ErrNoSuchImage
}
if e.Status == http.StatusConflict {
return nil, ErrContainerAlreadyExists
}
}
if err != nil {
return nil, err
}
defer resp.Body.Close()
var container Container
if err := json.NewDecoder(resp.Body).Decode(&container); err != nil {
return nil, err
}
container.Name = opts.Name
return &container, nil
}
// KeyValuePair is a type for generic key/value pairs as used in the Lxc
// configuration
type KeyValuePair struct {
Key string `json:"Key,omitempty" yaml:"Key,omitempty"`
Value string `json:"Value,omitempty" yaml:"Value,omitempty"`
}
// RestartPolicy represents the policy for automatically restarting a container.
//
// Possible values are:
//
// - always: the docker daemon will always restart the container
// - on-failure: the docker daemon will restart the container on failures, at
// most MaximumRetryCount times
// - no: the docker daemon will not restart the container automatically
type RestartPolicy struct {
Name string `json:"Name,omitempty" yaml:"Name,omitempty"`
MaximumRetryCount int `json:"MaximumRetryCount,omitempty" yaml:"MaximumRetryCount,omitempty"`
}
// AlwaysRestart returns a restart policy that tells the Docker daemon to
// always restart the container.
func AlwaysRestart() RestartPolicy {
return RestartPolicy{Name: "always"}
}
// RestartOnFailure returns a restart policy that tells the Docker daemon to
// restart the container on failures, trying at most maxRetry times.
func RestartOnFailure(maxRetry int) RestartPolicy {
return RestartPolicy{Name: "on-failure", MaximumRetryCount: maxRetry}
}
// NeverRestart returns a restart policy that tells the Docker daemon to never
// restart the container on failures.
func NeverRestart() RestartPolicy {
return RestartPolicy{Name: "no"}
}
// Device represents a device mapping between the Docker host and the
// container.
type Device struct {
PathOnHost string `json:"PathOnHost,omitempty" yaml:"PathOnHost,omitempty"`
PathInContainer string `json:"PathInContainer,omitempty" yaml:"PathInContainer,omitempty"`
CgroupPermissions string `json:"CgroupPermissions,omitempty" yaml:"CgroupPermissions,omitempty"`
}
// HostConfig contains the container options related to starting a container on
// a given host
type HostConfig struct {
Binds []string `json:"Binds,omitempty" yaml:"Binds,omitempty"`
CapAdd []string `json:"CapAdd,omitempty" yaml:"CapAdd,omitempty"`
CapDrop []string `json:"CapDrop,omitempty" yaml:"CapDrop,omitempty"`
GroupAdd []string `json:"GroupAdd,omitempty" yaml:"GroupAdd,omitempty"`
ContainerIDFile string `json:"ContainerIDFile,omitempty" yaml:"ContainerIDFile,omitempty"`
LxcConf []KeyValuePair `json:"LxcConf,omitempty" yaml:"LxcConf,omitempty"`
Privileged bool `json:"Privileged,omitempty" yaml:"Privileged,omitempty"`
PortBindings map[Port][]PortBinding `json:"PortBindings,omitempty" yaml:"PortBindings,omitempty"`
Links []string `json:"Links,omitempty" yaml:"Links,omitempty"`
PublishAllPorts bool `json:"PublishAllPorts,omitempty" yaml:"PublishAllPorts,omitempty"`
DNS []string `json:"Dns,omitempty" yaml:"Dns,omitempty"` // For Docker API v1.10 and above only
DNSOptions []string `json:"DnsOptions,omitempty" yaml:"DnsOptions,omitempty"`
DNSSearch []string `json:"DnsSearch,omitempty" yaml:"DnsSearch,omitempty"`
ExtraHosts []string `json:"ExtraHosts,omitempty" yaml:"ExtraHosts,omitempty"`
VolumesFrom []string `json:"VolumesFrom,omitempty" yaml:"VolumesFrom,omitempty"`
NetworkMode string `json:"NetworkMode,omitempty" yaml:"NetworkMode,omitempty"`
IpcMode string `json:"IpcMode,omitempty" yaml:"IpcMode,omitempty"`
PidMode string `json:"PidMode,omitempty" yaml:"PidMode,omitempty"`
UTSMode string `json:"UTSMode,omitempty" yaml:"UTSMode,omitempty"`
RestartPolicy RestartPolicy `json:"RestartPolicy,omitempty" yaml:"RestartPolicy,omitempty"`
Devices []Device `json:"Devices,omitempty" yaml:"Devices,omitempty"`
LogConfig LogConfig `json:"LogConfig,omitempty" yaml:"LogConfig,omitempty"`
ReadonlyRootfs bool `json:"ReadonlyRootfs,omitempty" yaml:"ReadonlyRootfs,omitempty"`
SecurityOpt []string `json:"SecurityOpt,omitempty" yaml:"SecurityOpt,omitempty"`
CgroupParent string `json:"CgroupParent,omitempty" yaml:"CgroupParent,omitempty"`
Memory int64 `json:"Memory,omitempty" yaml:"Memory,omitempty"`
MemorySwap int64 `json:"MemorySwap,omitempty" yaml:"MemorySwap,omitempty"`
MemorySwappiness int64 `json:"MemorySwappiness,omitempty" yaml:"MemorySwappiness,omitempty"`
OOMKillDisable bool `json:"OomKillDisable,omitempty" yaml:"OomKillDisable"`
CPUShares int64 `json:"CpuShares,omitempty" yaml:"CpuShares,omitempty"`
CPUSet string `json:"Cpuset,omitempty" yaml:"Cpuset,omitempty"`
CPUSetCPUs string `json:"CpusetCpus,omitempty" yaml:"CpusetCpus,omitempty"`
CPUSetMEMs string `json:"CpusetMems,omitempty" yaml:"CpusetMems,omitempty"`
CPUQuota int64 `json:"CpuQuota,omitempty" yaml:"CpuQuota,omitempty"`
CPUPeriod int64 `json:"CpuPeriod,omitempty" yaml:"CpuPeriod,omitempty"`
BlkioWeight int64 `json:"BlkioWeight,omitempty" yaml:"BlkioWeight"`
Ulimits []ULimit `json:"Ulimits,omitempty" yaml:"Ulimits,omitempty"`
VolumeDriver string `json:"VolumeDriver,omitempty" yaml:"VolumeDriver,omitempty"`
}
// StartContainer starts a container, returning an error in case of failure.
//
// See https://goo.gl/MrBAJv for more details.
func (c *Client) StartContainer(id string, hostConfig *HostConfig) error {
path := "/containers/" + id + "/start"
resp, err := c.do("POST", path, doOptions{data: hostConfig, forceJSON: true})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchContainer{ID: id, Err: err}
}
return err
}
if resp.StatusCode == http.StatusNotModified {
return &ContainerAlreadyRunning{ID: id}
}
resp.Body.Close()
return nil
}
// StopContainer stops a container, killing it after the given timeout (in
// seconds).
//
// See https://goo.gl/USqsFt for more details.
func (c *Client) StopContainer(id string, timeout uint) error {
path := fmt.Sprintf("/containers/%s/stop?t=%d", id, timeout)
resp, err := c.do("POST", path, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchContainer{ID: id}
}
return err
}
if resp.StatusCode == http.StatusNotModified {
return &ContainerNotRunning{ID: id}
}
resp.Body.Close()
return nil
}
// RestartContainer stops a container, killing it after the given timeout (in
// seconds), during the stop process.
//
// See https://goo.gl/QzsDnz for more details.
func (c *Client) RestartContainer(id string, timeout uint) error {
path := fmt.Sprintf("/containers/%s/restart?t=%d", id, timeout)
resp, err := c.do("POST", path, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchContainer{ID: id}
}
return err
}
resp.Body.Close()
return nil
}
// PauseContainer pauses the given container.
//
// See https://goo.gl/OF7W9X for more details.
func (c *Client) PauseContainer(id string) error {
path := fmt.Sprintf("/containers/%s/pause", id)
resp, err := c.do("POST", path, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchContainer{ID: id}
}
return err
}
resp.Body.Close()
return nil
}
// UnpauseContainer unpauses the given container.
//
// See https://goo.gl/7dwyPA for more details.
func (c *Client) UnpauseContainer(id string) error {
path := fmt.Sprintf("/containers/%s/unpause", id)
resp, err := c.do("POST", path, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchContainer{ID: id}
}
return err
}
resp.Body.Close()
return nil
}
// TopResult represents the list of processes running in a container, as
// returned by /containers/<id>/top.
//
// See https://goo.gl/Rb46aY for more details.
type TopResult struct {
Titles []string
Processes [][]string
}
// TopContainer returns processes running inside a container
//
// See https://goo.gl/Rb46aY for more details.
func (c *Client) TopContainer(id string, psArgs string) (TopResult, error) {
var args string
var result TopResult
if psArgs != "" {
args = fmt.Sprintf("?ps_args=%s", psArgs)
}
path := fmt.Sprintf("/containers/%s/top%s", id, args)
resp, err := c.do("GET", path, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return result, &NoSuchContainer{ID: id}
}
return result, err
}
defer resp.Body.Close()
if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
return result, err
}
return result, nil
}
// Stats represents container statistics, returned by /containers/<id>/stats.
//
// See https://goo.gl/GNmLHb for more details.
type Stats struct {
Read time.Time `json:"read,omitempty" yaml:"read,omitempty"`
Networks map[string]NetworkStats `json:"networks,omitempty" yaml:"networks,omitempty"`
MemoryStats struct {
Stats struct {
TotalPgmafault uint64 `json:"total_pgmafault,omitempty" yaml:"total_pgmafault,omitempty"`
Cache uint64 `json:"cache,omitempty" yaml:"cache,omitempty"`
MappedFile uint64 `json:"mapped_file,omitempty" yaml:"mapped_file,omitempty"`
TotalInactiveFile uint64 `json:"total_inactive_file,omitempty" yaml:"total_inactive_file,omitempty"`
Pgpgout uint64 `json:"pgpgout,omitempty" yaml:"pgpgout,omitempty"`
Rss uint64 `json:"rss,omitempty" yaml:"rss,omitempty"`
TotalMappedFile uint64 `json:"total_mapped_file,omitempty" yaml:"total_mapped_file,omitempty"`
Writeback uint64 `json:"writeback,omitempty" yaml:"writeback,omitempty"`
Unevictable uint64 `json:"unevictable,omitempty" yaml:"unevictable,omitempty"`
Pgpgin uint64 `json:"pgpgin,omitempty" yaml:"pgpgin,omitempty"`
TotalUnevictable uint64 `json:"total_unevictable,omitempty" yaml:"total_unevictable,omitempty"`
Pgmajfault uint64 `json:"pgmajfault,omitempty" yaml:"pgmajfault,omitempty"`
TotalRss uint64 `json:"total_rss,omitempty" yaml:"total_rss,omitempty"`
TotalRssHuge uint64 `json:"total_rss_huge,omitempty" yaml:"total_rss_huge,omitempty"`
TotalWriteback uint64 `json:"total_writeback,omitempty" yaml:"total_writeback,omitempty"`
TotalInactiveAnon uint64 `json:"total_inactive_anon,omitempty" yaml:"total_inactive_anon,omitempty"`
RssHuge uint64 `json:"rss_huge,omitempty" yaml:"rss_huge,omitempty"`
HierarchicalMemoryLimit uint64 `json:"hierarchical_memory_limit,omitempty" yaml:"hierarchical_memory_limit,omitempty"`
TotalPgfault uint64 `json:"total_pgfault,omitempty" yaml:"total_pgfault,omitempty"`
TotalActiveFile uint64 `json:"total_active_file,omitempty" yaml:"total_active_file,omitempty"`
ActiveAnon uint64 `json:"active_anon,omitempty" yaml:"active_anon,omitempty"`
TotalActiveAnon uint64 `json:"total_active_anon,omitempty" yaml:"total_active_anon,omitempty"`
TotalPgpgout uint64 `json:"total_pgpgout,omitempty" yaml:"total_pgpgout,omitempty"`
TotalCache uint64 `json:"total_cache,omitempty" yaml:"total_cache,omitempty"`
InactiveAnon uint64 `json:"inactive_anon,omitempty" yaml:"inactive_anon,omitempty"`
ActiveFile uint64 `json:"active_file,omitempty" yaml:"active_file,omitempty"`
Pgfault uint64 `json:"pgfault,omitempty" yaml:"pgfault,omitempty"`
InactiveFile uint64 `json:"inactive_file,omitempty" yaml:"inactive_file,omitempty"`
TotalPgpgin uint64 `json:"total_pgpgin,omitempty" yaml:"total_pgpgin,omitempty"`
} `json:"stats,omitempty" yaml:"stats,omitempty"`
MaxUsage uint64 `json:"max_usage,omitempty" yaml:"max_usage,omitempty"`
Usage uint64 `json:"usage,omitempty" yaml:"usage,omitempty"`
Failcnt uint64 `json:"failcnt,omitempty" yaml:"failcnt,omitempty"`
Limit uint64 `json:"limit,omitempty" yaml:"limit,omitempty"`
} `json:"memory_stats,omitempty" yaml:"memory_stats,omitempty"`
BlkioStats struct {
IOServiceBytesRecursive []BlkioStatsEntry `json:"io_service_bytes_recursive,omitempty" yaml:"io_service_bytes_recursive,omitempty"`
IOServicedRecursive []BlkioStatsEntry `json:"io_serviced_recursive,omitempty" yaml:"io_serviced_recursive,omitempty"`
IOQueueRecursive []BlkioStatsEntry `json:"io_queue_recursive,omitempty" yaml:"io_queue_recursive,omitempty"`
IOServiceTimeRecursive []BlkioStatsEntry `json:"io_service_time_recursive,omitempty" yaml:"io_service_time_recursive,omitempty"`
IOWaitTimeRecursive []BlkioStatsEntry `json:"io_wait_time_recursive,omitempty" yaml:"io_wait_time_recursive,omitempty"`
IOMergedRecursive []BlkioStatsEntry `json:"io_merged_recursive,omitempty" yaml:"io_merged_recursive,omitempty"`
IOTimeRecursive []BlkioStatsEntry `json:"io_time_recursive,omitempty" yaml:"io_time_recursive,omitempty"`
SectorsRecursive []BlkioStatsEntry `json:"sectors_recursive,omitempty" yaml:"sectors_recursive,omitempty"`
} `json:"blkio_stats,omitempty" yaml:"blkio_stats,omitempty"`
CPUStats CPUStats `json:"cpu_stats,omitempty" yaml:"cpu_stats,omitempty"`
PreCPUStats CPUStats `json:"precpu_stats,omitempty"`
}
// NetworkStats is a stats entry for network stats
type NetworkStats struct {
RxDropped uint64 `json:"rx_dropped,omitempty" yaml:"rx_dropped,omitempty"`
RxBytes uint64 `json:"rx_bytes,omitempty" yaml:"rx_bytes,omitempty"`
RxErrors uint64 `json:"rx_errors,omitempty" yaml:"rx_errors,omitempty"`
TxPackets uint64 `json:"tx_packets,omitempty" yaml:"tx_packets,omitempty"`
TxDropped uint64 `json:"tx_dropped,omitempty" yaml:"tx_dropped,omitempty"`
RxPackets uint64 `json:"rx_packets,omitempty" yaml:"rx_packets,omitempty"`
TxErrors uint64 `json:"tx_errors,omitempty" yaml:"tx_errors,omitempty"`
TxBytes uint64 `json:"tx_bytes,omitempty" yaml:"tx_bytes,omitempty"`
}
// CPUStats is a stats entry for cpu stats
type CPUStats struct {
CPUUsage struct {
PercpuUsage []uint64 `json:"percpu_usage,omitempty" yaml:"percpu_usage,omitempty"`
UsageInUsermode uint64 `json:"usage_in_usermode,omitempty" yaml:"usage_in_usermode,omitempty"`
TotalUsage uint64 `json:"total_usage,omitempty" yaml:"total_usage,omitempty"`
UsageInKernelmode uint64 `json:"usage_in_kernelmode,omitempty" yaml:"usage_in_kernelmode,omitempty"`
} `json:"cpu_usage,omitempty" yaml:"cpu_usage,omitempty"`
SystemCPUUsage uint64 `json:"system_cpu_usage,omitempty" yaml:"system_cpu_usage,omitempty"`
ThrottlingData struct {
Periods uint64 `json:"periods,omitempty"`
ThrottledPeriods uint64 `json:"throttled_periods,omitempty"`
ThrottledTime uint64 `json:"throttled_time,omitempty"`
} `json:"throttling_data,omitempty" yaml:"throttling_data,omitempty"`
}
// BlkioStatsEntry is a stats entry for blkio_stats
type BlkioStatsEntry struct {
Major uint64 `json:"major,omitempty" yaml:"major,omitempty"`
Minor uint64 `json:"minor,omitempty" yaml:"minor,omitempty"`
Op string `json:"op,omitempty" yaml:"op,omitempty"`
Value uint64 `json:"value,omitempty" yaml:"value,omitempty"`
}
// StatsOptions specify parameters to the Stats function.
//
// See https://goo.gl/GNmLHb for more details.
type StatsOptions struct {
ID string
Stats chan<- *Stats
Stream bool
// A flag that enables stopping the stats operation
Done <-chan bool
// Initial connection timeout
Timeout time.Duration
}
// Stats sends container statistics for the given container to the given channel.
//
// This function is blocking, similar to a streaming call for logs, and should be run
// on a separate goroutine from the caller. Note that this function will block until
// the given container is removed, not just exited. When finished, this function
// will close the given channel. Alternatively, function can be stopped by
// signaling on the Done channel.
//
// See https://goo.gl/GNmLHb for more details.
func (c *Client) Stats(opts StatsOptions) (retErr error) {
errC := make(chan error, 1)
readCloser, writeCloser := io.Pipe()
defer func() {
close(opts.Stats)
select {
case err := <-errC:
if err != nil && retErr == nil {
retErr = err
}
default:
// No errors
}
if err := readCloser.Close(); err != nil && retErr == nil {
retErr = err
}
}()
go func() {
err := c.stream("GET", fmt.Sprintf("/containers/%s/stats?stream=%v", opts.ID, opts.Stream), streamOptions{
rawJSONStream: true,
useJSONDecoder: true,
stdout: writeCloser,
timeout: opts.Timeout,
})
if err != nil {
dockerError, ok := err.(*Error)
if ok {
if dockerError.Status == http.StatusNotFound {
err = &NoSuchContainer{ID: opts.ID}
}
}
}
if closeErr := writeCloser.Close(); closeErr != nil && err == nil {
err = closeErr
}
errC <- err
close(errC)
}()
quit := make(chan struct{})
defer close(quit)
go func() {
// block here waiting for the signal to stop function
select {
case <-opts.Done:
readCloser.Close()
case <-quit:
return
}
}()
decoder := json.NewDecoder(readCloser)
stats := new(Stats)
for err := decoder.Decode(stats); err != io.EOF; err = decoder.Decode(stats) {
if err != nil {
return err
}
opts.Stats <- stats
stats = new(Stats)
}
return nil
}
// KillContainerOptions represents the set of options that can be used in a
// call to KillContainer.
//
// See https://goo.gl/hkS9i8 for more details.
type KillContainerOptions struct {
// The ID of the container.
ID string `qs:"-"`
// The signal to send to the container. When omitted, Docker server
// will assume SIGKILL.
Signal Signal
}
// KillContainer sends a signal to a container, returning an error in case of
// failure.
//
// See https://goo.gl/hkS9i8 for more details.
func (c *Client) KillContainer(opts KillContainerOptions) error {
path := "/containers/" + opts.ID + "/kill" + "?" + queryString(opts)
resp, err := c.do("POST", path, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchContainer{ID: opts.ID}
}
return err
}
resp.Body.Close()
return nil
}
// RemoveContainerOptions encapsulates options to remove a container.
//
// See https://goo.gl/RQyX62 for more details.
type RemoveContainerOptions struct {
// The ID of the container.
ID string `qs:"-"`
// A flag that indicates whether Docker should remove the volumes
// associated to the container.
RemoveVolumes bool `qs:"v"`
// A flag that indicates whether Docker should remove the container
// even if it is currently running.
Force bool
}
// RemoveContainer removes a container, returning an error in case of failure.
//
// See https://goo.gl/RQyX62 for more details.
func (c *Client) RemoveContainer(opts RemoveContainerOptions) error {
path := "/containers/" + opts.ID + "?" + queryString(opts)
resp, err := c.do("DELETE", path, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchContainer{ID: opts.ID}
}
return err
}
resp.Body.Close()
return nil
}
// UploadToContainerOptions is the set of options that can be used when
// uploading an archive into a container.
//
// See https://goo.gl/Ss97HW for more details.
type UploadToContainerOptions struct {
InputStream io.Reader `json:"-" qs:"-"`
Path string `qs:"path"`
NoOverwriteDirNonDir bool `qs:"noOverwriteDirNonDir"`
}
// UploadToContainer uploads a tar archive to be extracted to a path in the
// filesystem of the container.
//
// See https://goo.gl/Ss97HW for more details.
func (c *Client) UploadToContainer(id string, opts UploadToContainerOptions) error {
url := fmt.Sprintf("/containers/%s/archive?", id) + queryString(opts)
return c.stream("PUT", url, streamOptions{
in: opts.InputStream,
})
}
// DownloadFromContainerOptions is the set of options that can be used when
// downloading resources from a container.
//
// See https://goo.gl/KnZJDX for more details.
type DownloadFromContainerOptions struct {
OutputStream io.Writer `json:"-" qs:"-"`
Path string `qs:"path"`
}
// DownloadFromContainer downloads a tar archive of files or folders in a container.
//
// See https://goo.gl/KnZJDX for more details.
func (c *Client) DownloadFromContainer(id string, opts DownloadFromContainerOptions) error {
url := fmt.Sprintf("/containers/%s/archive?", id) + queryString(opts)
return c.stream("GET", url, streamOptions{
setRawTerminal: true,
stdout: opts.OutputStream,
})
}
// CopyFromContainerOptions has been DEPRECATED, please use DownloadFromContainerOptions along with DownloadFromContainer.
//
// See https://goo.gl/R2jevW for more details.
type CopyFromContainerOptions struct {
OutputStream io.Writer `json:"-"`
Container string `json:"-"`
Resource string
}
// CopyFromContainer has been DEPRECATED, please use DownloadFromContainerOptions along with DownloadFromContainer.
//
// See https://goo.gl/R2jevW for more details.
func (c *Client) CopyFromContainer(opts CopyFromContainerOptions) error {
if opts.Container == "" {
return &NoSuchContainer{ID: opts.Container}
}
url := fmt.Sprintf("/containers/%s/copy", opts.Container)
resp, err := c.do("POST", url, doOptions{data: opts})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchContainer{ID: opts.Container}
}
return err
}
defer resp.Body.Close()
_, err = io.Copy(opts.OutputStream, resp.Body)
return err
}
// WaitContainer blocks until the given container stops, return the exit code
// of the container status.
//
// See https://goo.gl/Gc1rge for more details.
func (c *Client) WaitContainer(id string) (int, error) {
resp, err := c.do("POST", "/containers/"+id+"/wait", doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return 0, &NoSuchContainer{ID: id}
}
return 0, err
}
defer resp.Body.Close()
var r struct{ StatusCode int }
if err := json.NewDecoder(resp.Body).Decode(&r); err != nil {
return 0, err
}
return r.StatusCode, nil
}
// CommitContainerOptions aggregates parameters to the CommitContainer method.
//
// See https://goo.gl/mqfoCw for more details.
type CommitContainerOptions struct {
Container string
Repository string `qs:"repo"`
Tag string
Message string `qs:"m"`
Author string
Run *Config `qs:"-"`
}
// CommitContainer creates a new image from a container's changes.
//
// See https://goo.gl/mqfoCw for more details.
func (c *Client) CommitContainer(opts CommitContainerOptions) (*Image, error) {
path := "/commit?" + queryString(opts)
resp, err := c.do("POST", path, doOptions{data: opts.Run})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return nil, &NoSuchContainer{ID: opts.Container}
}
return nil, err
}
defer resp.Body.Close()
var image Image
if err := json.NewDecoder(resp.Body).Decode(&image); err != nil {
return nil, err
}