istgtcontrol1

Usage

Overview

istgtcontrol is a command and control utility for istgt(1). It can be used to query and change the status of a local or remote istgt instance.

istgtcontrol supports the commands denoted below to interact with the istgt instance. By default it connects and authenticates to the iSCSI target portal specified in the istgtcontrol.conf configuration file and uses CHAP credentials denoted there, if any. Both can be overridden by using the respecitve command line arguments.

Commands

istgtcontrol understands the following commands which can be forwarded to istgt:

noop

Do not actually do anything, but test responsiveness of the portal and test CHAP credentials only.

version

Retrieve the istgt version number providing the iSCSI portal istgtcontrol connected to.

list

List all, or the specified targets only, which shared by the portal.

load

Load a new media to the specified unit. This command issues the same command as if a drive tray had been closed on a SCSI device.

unload

Unload a media from the specified unit. This command issues the same command as if the drive tray had been opened from a SCSI device.

change file

Change the loaded media by the specified unit. This command is equivalent as if a new media (for example a DVD-ROM or tape cartridge) had been inserted in the SCSI drive. The "file" argument is interpreted as filename to be loaded.

reset

Reset the specified LUN of the portal.

info

Display all connections of the portal

Options

-c config

Use specified file as configuration file instead of the default file.

-h host

Override the target portal by the specified host name or IP address. This defaults to "localhost" if no other host was specified in the configuration file.

-p port

Override the target portal port by the specified port number. This defaults to "3261" if no other port was specified in the configuration file.

-t target

Specifies the target IQN which should be affected by the command given. There may be a default given in the configuration file. The keyword "all" is accepted by some commands and matches all exported volumes.

-l lun

Specifies the target LUN which should be affected by the command given. This defaults to "0" unless another default was provided in the configuration file.

-f flags

Specifies flags passed to the portal when loading a new media. This defaults to "ro". Supported flags are: "ro", "rw", "extend" and "dynamic".

-s size

Specifies the size of the meda to be loaded. The default is to auto-detect the media size.

-q

Quiet mode, supress non-critical outputs.

-v

Verbose mode, gives more output during operations.

-A method

Sets the preferred authentication method for logging in to the portal. This overrides any method specified in the configuration file. Supported methods are either CHAP/Mutual or CHAP/Auto.

-U user

Sets the user to authenticate on the portal. This overrides any username specified in the configuration file.

-S secret

Set the secret used to authenticate on the portal. This overrides any secret specified in the configuration file.

-M muser

Set the mutual authentication user. This overrides any user specified in the configuration file.

-R msecret

Set the mutual authentication secret. This overrides any secret specified in the configuration file.

-H

Display a brief usage summary and exit.

-V

Display the istgtcontrol version number and exit.

Files

/etc/istgt/istgtcontrol.conf

Configuration file