forked from containerd/containerd
-
Notifications
You must be signed in to change notification settings - Fork 0
/
init_state.go
446 lines (362 loc) · 11.7 KB
/
init_state.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
// +build !windows
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package proc
import (
"context"
"sync"
"syscall"
"github.com/containerd/console"
"github.com/containerd/containerd/runtime/proc"
"github.com/containerd/fifo"
runc "github.com/containerd/go-runc"
google_protobuf "github.com/gogo/protobuf/types"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
type initState interface {
Resize(console.WinSize) error
Start(context.Context) error
Delete(context.Context) error
Pause(context.Context) error
Resume(context.Context) error
Update(context.Context, *google_protobuf.Any) error
Checkpoint(context.Context, *CheckpointConfig) error
Exec(context.Context, string, *ExecConfig) (proc.Process, error)
Kill(context.Context, uint32, bool) error
SetExited(int)
Status(context.Context) (string, error)
}
type createdState struct {
p *Init
}
func (s *createdState) transition(name string) error {
switch name {
case "running":
s.p.initState = &runningState{p: s.p}
case "stopped":
s.p.initState = &stoppedState{p: s.p}
case "deleted":
s.p.initState = &deletedState{}
default:
return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
}
return nil
}
func (s *createdState) Pause(ctx context.Context) error {
return errors.Errorf("cannot pause task in created state")
}
func (s *createdState) Resume(ctx context.Context) error {
return errors.Errorf("cannot resume task in created state")
}
func (s *createdState) Update(ctx context.Context, r *google_protobuf.Any) error {
return s.p.update(ctx, r)
}
func (s *createdState) Checkpoint(ctx context.Context, r *CheckpointConfig) error {
return errors.Errorf("cannot checkpoint a task in created state")
}
func (s *createdState) Resize(ws console.WinSize) error {
return s.p.resize(ws)
}
func (s *createdState) Start(ctx context.Context) error {
if err := s.p.start(ctx); err != nil {
return err
}
return s.transition("running")
}
func (s *createdState) Delete(ctx context.Context) error {
if err := s.p.delete(ctx); err != nil {
return err
}
return s.transition("deleted")
}
func (s *createdState) Kill(ctx context.Context, sig uint32, all bool) error {
return s.p.kill(ctx, sig, all)
}
func (s *createdState) SetExited(status int) {
s.p.setExited(status)
if err := s.transition("stopped"); err != nil {
panic(err)
}
}
func (s *createdState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
return s.p.exec(ctx, path, r)
}
func (s *createdState) Status(ctx context.Context) (string, error) {
return "created", nil
}
type createdCheckpointState struct {
p *Init
opts *runc.RestoreOpts
}
func (s *createdCheckpointState) transition(name string) error {
switch name {
case "running":
s.p.initState = &runningState{p: s.p}
case "stopped":
s.p.initState = &stoppedState{p: s.p}
case "deleted":
s.p.initState = &deletedState{}
default:
return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
}
return nil
}
func (s *createdCheckpointState) Pause(ctx context.Context) error {
return errors.Errorf("cannot pause task in created state")
}
func (s *createdCheckpointState) Resume(ctx context.Context) error {
return errors.Errorf("cannot resume task in created state")
}
func (s *createdCheckpointState) Update(ctx context.Context, r *google_protobuf.Any) error {
return s.p.update(ctx, r)
}
func (s *createdCheckpointState) Checkpoint(ctx context.Context, r *CheckpointConfig) error {
return errors.Errorf("cannot checkpoint a task in created state")
}
func (s *createdCheckpointState) Resize(ws console.WinSize) error {
return s.p.resize(ws)
}
func (s *createdCheckpointState) Start(ctx context.Context) error {
p := s.p
sio := p.stdio
var (
err error
socket *runc.Socket
)
if sio.Terminal {
if socket, err = runc.NewTempConsoleSocket(); err != nil {
return errors.Wrap(err, "failed to create OCI runtime console socket")
}
defer socket.Close()
s.opts.ConsoleSocket = socket
}
if _, err := s.p.runtime.Restore(ctx, p.id, p.Bundle, s.opts); err != nil {
return p.runtimeError(err, "OCI runtime restore failed")
}
if sio.Stdin != "" {
sc, err := fifo.OpenFifo(context.Background(), sio.Stdin, syscall.O_WRONLY|syscall.O_NONBLOCK, 0)
if err != nil {
return errors.Wrapf(err, "failed to open stdin fifo %s", sio.Stdin)
}
p.stdin = sc
p.closers = append(p.closers, sc)
}
var copyWaitGroup sync.WaitGroup
if socket != nil {
console, err := socket.ReceiveMaster()
if err != nil {
return errors.Wrap(err, "failed to retrieve console master")
}
console, err = p.Platform.CopyConsole(ctx, console, sio.Stdin, sio.Stdout, sio.Stderr, &p.wg, ©WaitGroup)
if err != nil {
return errors.Wrap(err, "failed to start console copy")
}
p.console = console
} else if !sio.IsNull() {
if err := copyPipes(ctx, p.io, sio.Stdin, sio.Stdout, sio.Stderr, &p.wg, ©WaitGroup); err != nil {
return errors.Wrap(err, "failed to start io pipe copy")
}
}
copyWaitGroup.Wait()
pid, err := runc.ReadPidFile(s.opts.PidFile)
if err != nil {
return errors.Wrap(err, "failed to retrieve OCI runtime container pid")
}
p.pid = pid
return s.transition("running")
}
func (s *createdCheckpointState) Delete(ctx context.Context) error {
if err := s.p.delete(ctx); err != nil {
return err
}
return s.transition("deleted")
}
func (s *createdCheckpointState) Kill(ctx context.Context, sig uint32, all bool) error {
return s.p.kill(ctx, sig, all)
}
func (s *createdCheckpointState) SetExited(status int) {
s.p.setExited(status)
if err := s.transition("stopped"); err != nil {
panic(err)
}
}
func (s *createdCheckpointState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
return nil, errors.Errorf("cannot exec in a created state")
}
func (s *createdCheckpointState) Status(ctx context.Context) (string, error) {
return "created", nil
}
type runningState struct {
p *Init
}
func (s *runningState) transition(name string) error {
switch name {
case "stopped":
s.p.initState = &stoppedState{p: s.p}
case "paused":
s.p.initState = &pausedState{p: s.p}
default:
return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
}
return nil
}
func (s *runningState) Pause(ctx context.Context) error {
s.p.pausing.set(true)
// NOTE "pausing" will be returned in the short window
// after `transition("paused")`, before `pausing` is reset
// to false. That doesn't break the state machine, just
// delays the "paused" state a little bit.
defer s.p.pausing.set(false)
if err := s.p.runtime.Pause(ctx, s.p.id); err != nil {
return s.p.runtimeError(err, "OCI runtime pause failed")
}
return s.transition("paused")
}
func (s *runningState) Resume(ctx context.Context) error {
return errors.Errorf("cannot resume a running process")
}
func (s *runningState) Update(ctx context.Context, r *google_protobuf.Any) error {
return s.p.update(ctx, r)
}
func (s *runningState) Checkpoint(ctx context.Context, r *CheckpointConfig) error {
return s.p.checkpoint(ctx, r)
}
func (s *runningState) Resize(ws console.WinSize) error {
return s.p.resize(ws)
}
func (s *runningState) Start(ctx context.Context) error {
return errors.Errorf("cannot start a running process")
}
func (s *runningState) Delete(ctx context.Context) error {
return errors.Errorf("cannot delete a running process")
}
func (s *runningState) Kill(ctx context.Context, sig uint32, all bool) error {
return s.p.kill(ctx, sig, all)
}
func (s *runningState) SetExited(status int) {
s.p.setExited(status)
if err := s.transition("stopped"); err != nil {
panic(err)
}
}
func (s *runningState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
return s.p.exec(ctx, path, r)
}
func (s *runningState) Status(ctx context.Context) (string, error) {
return "running", nil
}
type pausedState struct {
p *Init
}
func (s *pausedState) transition(name string) error {
switch name {
case "running":
s.p.initState = &runningState{p: s.p}
case "stopped":
s.p.initState = &stoppedState{p: s.p}
default:
return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
}
return nil
}
func (s *pausedState) Pause(ctx context.Context) error {
return errors.Errorf("cannot pause a paused container")
}
func (s *pausedState) Resume(ctx context.Context) error {
if err := s.p.runtime.Resume(ctx, s.p.id); err != nil {
return s.p.runtimeError(err, "OCI runtime resume failed")
}
return s.transition("running")
}
func (s *pausedState) Update(ctx context.Context, r *google_protobuf.Any) error {
return s.p.update(ctx, r)
}
func (s *pausedState) Checkpoint(ctx context.Context, r *CheckpointConfig) error {
return s.p.checkpoint(ctx, r)
}
func (s *pausedState) Resize(ws console.WinSize) error {
return s.p.resize(ws)
}
func (s *pausedState) Start(ctx context.Context) error {
return errors.Errorf("cannot start a paused process")
}
func (s *pausedState) Delete(ctx context.Context) error {
return errors.Errorf("cannot delete a paused process")
}
func (s *pausedState) Kill(ctx context.Context, sig uint32, all bool) error {
return s.p.kill(ctx, sig, all)
}
func (s *pausedState) SetExited(status int) {
s.p.setExited(status)
if err := s.p.runtime.Resume(context.Background(), s.p.id); err != nil {
logrus.WithError(err).Error("resuming exited container from paused state")
}
if err := s.transition("stopped"); err != nil {
panic(err)
}
}
func (s *pausedState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
return nil, errors.Errorf("cannot exec in a paused state")
}
func (s *pausedState) Status(ctx context.Context) (string, error) {
return "paused", nil
}
type stoppedState struct {
p *Init
}
func (s *stoppedState) transition(name string) error {
switch name {
case "deleted":
s.p.initState = &deletedState{}
default:
return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
}
return nil
}
func (s *stoppedState) Pause(ctx context.Context) error {
return errors.Errorf("cannot pause a stopped container")
}
func (s *stoppedState) Resume(ctx context.Context) error {
return errors.Errorf("cannot resume a stopped container")
}
func (s *stoppedState) Update(ctx context.Context, r *google_protobuf.Any) error {
return errors.Errorf("cannot update a stopped container")
}
func (s *stoppedState) Checkpoint(ctx context.Context, r *CheckpointConfig) error {
return errors.Errorf("cannot checkpoint a stopped container")
}
func (s *stoppedState) Resize(ws console.WinSize) error {
return errors.Errorf("cannot resize a stopped container")
}
func (s *stoppedState) Start(ctx context.Context) error {
return errors.Errorf("cannot start a stopped process")
}
func (s *stoppedState) Delete(ctx context.Context) error {
if err := s.p.delete(ctx); err != nil {
return err
}
return s.transition("deleted")
}
func (s *stoppedState) Kill(ctx context.Context, sig uint32, all bool) error {
return s.p.kill(ctx, sig, all)
}
func (s *stoppedState) SetExited(status int) {
// no op
}
func (s *stoppedState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
return nil, errors.Errorf("cannot exec in a stopped state")
}
func (s *stoppedState) Status(ctx context.Context) (string, error) {
return "stopped", nil
}