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
|
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"github.com/containerd/log"
"github.com/docker/docker/api/types/events"
"github.com/docker/docker/container"
)
// ContainerPause pauses a container
func (daemon *Daemon) ContainerPause(name string) error {
ctr, err := daemon.GetContainer(name)
if err != nil {
return err
}
return daemon.containerPause(ctr)
}
// containerPause pauses the container execution without stopping the process.
// The execution can be resumed by calling containerUnpause.
func (daemon *Daemon) containerPause(container *container.Container) error {
container.Lock()
defer container.Unlock()
// We cannot Pause the container which is not running
tsk, err := container.GetRunningTask()
if err != nil {
return err
}
// We cannot Pause the container which is already paused
if container.Paused {
return errNotPaused(container.ID)
}
// We cannot Pause the container which is restarting
if container.Restarting {
return errContainerIsRestarting(container.ID)
}
if err := tsk.Pause(context.Background()); err != nil {
return fmt.Errorf("cannot pause container %s: %s", container.ID, err)
}
container.Paused = true
daemon.setStateCounter(container)
daemon.updateHealthMonitor(container)
daemon.LogContainerEvent(container, events.ActionPause)
if err := container.CheckpointTo(context.WithoutCancel(context.TODO()), daemon.containersReplica); err != nil {
log.G(context.TODO()).WithError(err).Warn("could not save container to disk")
}
return nil
}
|
