vzmigrate(8)                      Containers                      vzmigrate(8)





NAME
       vzmigrate - utility for container migration between hardware nodes.


SYNOPSIS
       vzmigrate [-r|--remove-area yes|no] [--ssh=ssh_options]
       [--rsync=rsync_options] [--keep-dst] [--online] [-v]
       destination_address CTID


DESCRIPTION
       This utility is used to migrate a container from one (source) Hardware
       Node (HN) to another (destination) HN. The utility can migrate either
       stopped or running container. For a stopped container, simple CT
       private area transfer is performed (rsync(1) is used for file
       transfer). For running containers, migration may be offline (default)
       or online.

       This program uses ssh as a transport layer. You will need to put ssh
       public key to destination node and be able to connect to node without
       entering password.


OPTIONS
       -r, --remove-area yes|no
              Whether to remove a container area on source HN for the
              successfully migrated container. Default is yes.


       --ssh=options
              Additional options that will be passed to ssh while establishing
              connection to destination HN.


       --rsync=options
              Additional options that will be passed to rsync(8).  You may add
              options like -z to enable data compression if you are migrating
              over a slow link.


       --keep-dst
              Do not clean synced destination container private area in case
              of some error. It makes sense to use this option on big
              container migration to avoid syncing container private area
              again in case some error (on container stop for example) occurs
              during first migration attempt.


       --online
              Perform online (zero-downtime) migration: during the migration
              the container hangs for a while and after the migration it
              continues working as though nothing has happened.


       -v     Verbose mode. Causes vzmigrate to print debugging messages about
              its progress.  Multiple -v options increase the verbosity.  The
              maximum is 3.


EXAMPLES
       Migration of CT #101 to 192.168.1.130 with downtime:
            vzmigrate 192.168.1.130 101

       Online migration of CT #102 to 192.168.1.130:
            vzmigrate --online 192.168.1.130 102


EXIT STATUS
       0 EXIT_OK
              Command completed successfully.

       1 EXIT_USAGE
              Bad command line options.

       2 EXIT_VE_STOPPED
              Container is stopped.

       4 EXIT_CONNECT
              Can't connect to destination (source) HN.

       6 EXIT_COPY
              Container private area copying/moving failed.

       7 EXIT_VE_START
              Can't start or restore destination CT.

       8 EXIT_VE_STOP
              Can't stop or checkpoint source CT.

       9 EXIT_EXISTS
              Container already exists on destination HN.

       10 EXIT_NOTEXIST
              Container does not exists on source HN.

       12 EXIT_IP_INUSE
              You attempt to migrate CT which IP address(es) are already in
              use on the destination node.

       13 EXIT_QUOTA
              Operation with CT quota failed.



SEE ALSO
       rsync(1).


COPYRIGHT
       Copyright (C) 2001-2010, Parallels, Inc. Licensed under GNU GPL.



OpenVZ                            6 Jul 2010                      vzmigrate(8)