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Chapter 6

Control Software

The Xen control software includes the xend node control daemon (which must be

running), the xm command line tools, and the prototype xensv web interface.

6.1 Xend (node control daemon)

The Xen Daemon (Xend) performs system management functions related to virtual

machines. It forms a central point of control for a machine and can be controlled using

an HTTP-based protocol. Xend must be running in order to start and manage virtual

machines.

Xend must be run as root because it needs access to privileged system management

functions. A small set of commands may be issued on the xend command line:

# xend start start xend, if not already running

# xend stop stop xend if already running

# xend restart restart xend if running, otherwise start it

# xend status indicates xend status by its return code

A SysV init script called xend is provided to start xend at boot time. make install

installs this script in /etc/init.d. To enable it, you have to make symbolic links in

the appropriate runlevel directories or use the chkconfig tool, where available.

Once xend is running, more sophisticated administration can be done using the xm

tool (see Section 6.2) and the experimental Xensv web interface (see Section 6.3).

As xend runs, events will be logged to /var/log/xend.log and, if the migration

assistant daemon (xfrd) has been started, /var/log/xfrd.log. These may be of

use for troubleshooting problems.

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Belkin XM Commander Manuel d'utilisateur Page 33