github.com/sijibomii/docker@v0.0.0-20231230191044-5cf6ca554647/daemon/pause.go (about)

     1  package daemon
     2  
     3  import (
     4  	"fmt"
     5  
     6  	"github.com/docker/docker/container"
     7  )
     8  
     9  // ContainerPause pauses a container
    10  func (daemon *Daemon) ContainerPause(name string) error {
    11  	container, err := daemon.GetContainer(name)
    12  	if err != nil {
    13  		return err
    14  	}
    15  
    16  	if err := daemon.containerPause(container); err != nil {
    17  		return err
    18  	}
    19  
    20  	return nil
    21  }
    22  
    23  // containerPause pauses the container execution without stopping the process.
    24  // The execution can be resumed by calling containerUnpause.
    25  func (daemon *Daemon) containerPause(container *container.Container) error {
    26  	container.Lock()
    27  	defer container.Unlock()
    28  
    29  	// We cannot Pause the container which is not running
    30  	if !container.Running {
    31  		return errNotRunning{container.ID}
    32  	}
    33  
    34  	// We cannot Pause the container which is already paused
    35  	if container.Paused {
    36  		return fmt.Errorf("Container %s is already paused", container.ID)
    37  	}
    38  
    39  	// We cannot Pause the container which is restarting
    40  	if container.Restarting {
    41  		return errContainerIsRestarting(container.ID)
    42  	}
    43  
    44  	if err := daemon.containerd.Pause(container.ID); err != nil {
    45  		return fmt.Errorf("Cannot pause container %s: %s", container.ID, err)
    46  	}
    47  
    48  	return nil
    49  }