XNBD-REGISTER(1)					      General Commands Manual						  XNBD-REGISTER(1)

NAME

       xnbd-register -- Restore xNBD sessions upon boot

SYNOPSIS

       xnbd-register [--start]	[--stop]  [--restart]  [--status]  [--quiet]

DESCRIPTION

       With  the xmbd-register command one can restore xnbd-server and xnbd-client sessions based on a configuration file. This is useful to start
       both, client or server upon boot.

       To achieve this, xmbd-register reads a semi-structured configuration file located in /etc/xnbd.conf. See below for format hints.

OPTIONS

       The following options are supported:

       --start	 Start devices configured in the configuration files. If the configuration files describes  volumes,  xnbd-register  will  try	to
		 establish a client connection to the configured server instance.

		 Alternatively, xnbd-register will start sharing configured volumes by starting an xnbd-wrapper super server.

       --status  Retrieve server status from a running xnbd-wrapper command, if applicable.

       --stop	 Analogous to the start option, the stop argument will stop all xnbd connection, being client or server instances.

       --restart Restart all xnbd instances, being client or server

CONFIGURATION FILE

       xnbd-register  will  read its defaults from /etc/xnbd.conf. This is a semi-structured configuration file, describing client and server con-
       nections that are supposed to be restored upon start of the system.

       The syntax of the file is a JSON data structure, allowing comments starting with a hash key ("#"). Two types  of  objects  are  recognized:
       xnbd  volumes  and  a server instance. xnbd volumes are indexed by the supposed devices name. This is, to restore /dev/nbd0 an object named
       "nbd0 must be configured. Valid arguments are host, name and port. So, for example, this is  to	configure  /dev/nbd0	    connecting	to
       localhost on port 8520. If present, identify the shared device by the configured logical name:

       "nbd0": {
       "host": "127.0.0.1",
       "port": 8520,
       "name": "name"
       }

       Similarly, a server instance configures an xnbd-wrapper. Valid options are:

       address	 Specifies the listening address

       port	 Specifies the listening port

       socket	 Specifies the listening socket for the control channels

       logpath	 Specifies the log path where logging output is being redirected to

       volumes	 A list of volumes which are exported

       "server": {
       "address": "127.0.0.1",
       "port": 8520,
       "socket": "/var/run/xnbd.ctl",
       "logpath": "/tmp/xnbd.log",
       "volumes": [ "/dev/volume", "/dev/sdb1", "/var/lib/image.file" ]
       }

SEE ALSO

       xnbd-wrapper (8), xnbd-client (1)

AUTHOR

       xnbd-register was written by Arno Toell (debian@toell.net) for the Debian GNU/Linux     system. Report bugs to the Debian bug tracking sys-
       tem on http://bugs.debian.org

       This manual page was written by Arno Toell (debian@toell.net) for the Debian GNU/Linux system (but may be used by  others).  Permission	is
       granted	to  copy, distribute and/or modify this document under the terms of the GNU General Public License, version 2, as published by the
       Free Software Foundation.

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