github.com/clintkitson/docker@v1.9.1/daemon/rename.go (about)

     1  package daemon
     2  
     3  import (
     4  	"github.com/Sirupsen/logrus"
     5  	derr "github.com/docker/docker/errors"
     6  	"github.com/docker/libnetwork"
     7  	"strings"
     8  )
     9  
    10  // ContainerRename changes the name of a container, using the oldName
    11  // to find the container. An error is returned if newName is already
    12  // reserved.
    13  func (daemon *Daemon) ContainerRename(oldName, newName string) error {
    14  	var (
    15  		err       error
    16  		sid       string
    17  		sb        libnetwork.Sandbox
    18  		container *Container
    19  	)
    20  
    21  	if oldName == "" || newName == "" {
    22  		return derr.ErrorCodeEmptyRename
    23  	}
    24  
    25  	container, err = daemon.Get(oldName)
    26  	if err != nil {
    27  		return err
    28  	}
    29  
    30  	oldName = container.Name
    31  
    32  	container.Lock()
    33  	defer container.Unlock()
    34  	if newName, err = daemon.reserveName(container.ID, newName); err != nil {
    35  		return derr.ErrorCodeRenameTaken.WithArgs(err)
    36  	}
    37  
    38  	container.Name = newName
    39  
    40  	defer func() {
    41  		if err != nil {
    42  			container.Name = oldName
    43  			daemon.reserveName(container.ID, oldName)
    44  			daemon.containerGraphDB.Delete(newName)
    45  		}
    46  	}()
    47  
    48  	if err = daemon.containerGraphDB.Delete(oldName); err != nil {
    49  		return derr.ErrorCodeRenameDelete.WithArgs(oldName, err)
    50  	}
    51  
    52  	if err = container.toDisk(); err != nil {
    53  		return err
    54  	}
    55  
    56  	if !container.Running {
    57  		container.logEvent("rename")
    58  		return nil
    59  	}
    60  
    61  	defer func() {
    62  		if err != nil {
    63  			container.Name = oldName
    64  			if e := container.toDisk(); e != nil {
    65  				logrus.Errorf("%s: Failed in writing to Disk on rename failure: %v", container.ID, e)
    66  			}
    67  		}
    68  	}()
    69  
    70  	sid = container.NetworkSettings.SandboxID
    71  	sb, err = daemon.netController.SandboxByID(sid)
    72  	if err != nil {
    73  		return err
    74  	}
    75  
    76  	err = sb.Rename(strings.TrimPrefix(container.Name, "/"))
    77  	if err != nil {
    78  		return err
    79  	}
    80  
    81  	container.logEvent("rename")
    82  	return nil
    83  }