github.com/fcwu/docker@v1.4.2-0.20150115145920-2a69ca89f0df/daemon/delete.go (about)

     1  package daemon
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"path"
     7  
     8  	log "github.com/Sirupsen/logrus"
     9  	"github.com/docker/docker/engine"
    10  )
    11  
    12  func (daemon *Daemon) ContainerRm(job *engine.Job) engine.Status {
    13  	if len(job.Args) != 1 {
    14  		return job.Errorf("Not enough arguments. Usage: %s CONTAINER\n", job.Name)
    15  	}
    16  	name := job.Args[0]
    17  	removeVolume := job.GetenvBool("removeVolume")
    18  	removeLink := job.GetenvBool("removeLink")
    19  	forceRemove := job.GetenvBool("forceRemove")
    20  	container := daemon.Get(name)
    21  
    22  	if container == nil {
    23  		return job.Errorf("No such container: %s", name)
    24  	}
    25  
    26  	if removeLink {
    27  		name, err := GetFullContainerName(name)
    28  		if err != nil {
    29  			job.Error(err)
    30  		}
    31  		parent, n := path.Split(name)
    32  		if parent == "/" {
    33  			return job.Errorf("Conflict, cannot remove the default name of the container")
    34  		}
    35  		pe := daemon.ContainerGraph().Get(parent)
    36  		if pe == nil {
    37  			return job.Errorf("Cannot get parent %s for name %s", parent, name)
    38  		}
    39  		parentContainer := daemon.Get(pe.ID())
    40  
    41  		if parentContainer != nil {
    42  			parentContainer.DisableLink(n)
    43  		}
    44  
    45  		if err := daemon.ContainerGraph().Delete(name); err != nil {
    46  			return job.Error(err)
    47  		}
    48  		return engine.StatusOK
    49  	}
    50  
    51  	if container != nil {
    52  		if container.IsRunning() {
    53  			if forceRemove {
    54  				if err := container.Kill(); err != nil {
    55  					return job.Errorf("Could not kill running container, cannot remove - %v", err)
    56  				}
    57  			} else {
    58  				return job.Errorf("Conflict, You cannot remove a running container. Stop the container before attempting removal or use -f")
    59  			}
    60  		}
    61  		if err := daemon.Destroy(container); err != nil {
    62  			return job.Errorf("Cannot destroy container %s: %s", name, err)
    63  		}
    64  		container.LogEvent("destroy")
    65  		if removeVolume {
    66  			daemon.DeleteVolumes(container.VolumePaths())
    67  		}
    68  	}
    69  	return engine.StatusOK
    70  }
    71  
    72  func (daemon *Daemon) DeleteVolumes(volumeIDs map[string]struct{}) {
    73  	for id := range volumeIDs {
    74  		if err := daemon.volumes.Delete(id); err != nil {
    75  			log.Infof("%s", err)
    76  			continue
    77  		}
    78  	}
    79  }
    80  
    81  // Destroy unregisters a container from the daemon and cleanly removes its contents from the filesystem.
    82  // FIXME: rename to Rm for consistency with the CLI command
    83  func (daemon *Daemon) Destroy(container *Container) error {
    84  	if container == nil {
    85  		return fmt.Errorf("The given container is <nil>")
    86  	}
    87  
    88  	element := daemon.containers.Get(container.ID)
    89  	if element == nil {
    90  		return fmt.Errorf("Container %v not found - maybe it was already destroyed?", container.ID)
    91  	}
    92  
    93  	if err := container.Stop(3); err != nil {
    94  		return err
    95  	}
    96  
    97  	// Deregister the container before removing its directory, to avoid race conditions
    98  	daemon.idIndex.Delete(container.ID)
    99  	daemon.containers.Delete(container.ID)
   100  	container.derefVolumes()
   101  	if _, err := daemon.containerGraph.Purge(container.ID); err != nil {
   102  		log.Debugf("Unable to remove container from link graph: %s", err)
   103  	}
   104  
   105  	if err := daemon.driver.Remove(container.ID); err != nil {
   106  		return fmt.Errorf("Driver %s failed to remove root filesystem %s: %s", daemon.driver, container.ID, err)
   107  	}
   108  
   109  	initID := fmt.Sprintf("%s-init", container.ID)
   110  	if err := daemon.driver.Remove(initID); err != nil {
   111  		return fmt.Errorf("Driver %s failed to remove init filesystem %s: %s", daemon.driver, initID, err)
   112  	}
   113  
   114  	if err := os.RemoveAll(container.root); err != nil {
   115  		return fmt.Errorf("Unable to remove filesystem for %v: %v", container.ID, err)
   116  	}
   117  
   118  	if err := daemon.execDriver.Clean(container.ID); err != nil {
   119  		return fmt.Errorf("Unable to remove execdriver data for %s: %s", container.ID, err)
   120  	}
   121  
   122  	selinuxFreeLxcContexts(container.ProcessLabel)
   123  
   124  	return nil
   125  }