github.com/docker/docker@v299999999.0.0-20200612211812-aaf470eca7b5+incompatible/daemon/unpause.go (about)

     1  package daemon // import "github.com/docker/docker/daemon"
     2  
     3  import (
     4  	"context"
     5  	"fmt"
     6  
     7  	"github.com/docker/docker/container"
     8  	"github.com/sirupsen/logrus"
     9  )
    10  
    11  // ContainerUnpause unpauses a container
    12  func (daemon *Daemon) ContainerUnpause(name string) error {
    13  	ctr, err := daemon.GetContainer(name)
    14  	if err != nil {
    15  		return err
    16  	}
    17  	return daemon.containerUnpause(ctr)
    18  }
    19  
    20  // containerUnpause resumes the container execution after the container is paused.
    21  func (daemon *Daemon) containerUnpause(ctr *container.Container) error {
    22  	ctr.Lock()
    23  	defer ctr.Unlock()
    24  
    25  	// We cannot unpause the container which is not paused
    26  	if !ctr.Paused {
    27  		return fmt.Errorf("Container %s is not paused", ctr.ID)
    28  	}
    29  
    30  	if err := daemon.containerd.Resume(context.Background(), ctr.ID); err != nil {
    31  		return fmt.Errorf("Cannot unpause container %s: %s", ctr.ID, err)
    32  	}
    33  
    34  	ctr.Paused = false
    35  	daemon.setStateCounter(ctr)
    36  	daemon.updateHealthMonitor(ctr)
    37  	daemon.LogContainerEvent(ctr, "unpause")
    38  
    39  	if err := ctr.CheckpointTo(daemon.containersReplica); err != nil {
    40  		logrus.WithError(err).Warn("could not save container to disk")
    41  	}
    42  
    43  	return nil
    44  }