[Michael T. Babcock] Xen stuff

I've been playing around with Xen for a few weeks now and enjoying some of the features. If you read anything here and have any suggestions because I did something stupid, feel free to E-mail me (see the bottom of the page).


I configured my base system with a Xen kernel and LVM support. I made the entire disk array (software RAID with four disks) one big PV (except for /boot) and configured a volume group on it we'll call server. I created logical volumes for my root, /home and a couple other mount points as usual, leaving much of the space free. When I configured my first domU, a web server, I created a logical volume of 12G called /dev/server/xen_webserver1 and installed Linux on it as per the Xen instructions. Within that server (which sees /dev/xvda as its disk), I partitioned it also as one small /boot partition with the rest as a volume group (called webserver).

After some time, I realized I needed more space. I went out to the console of server and used lvextend to grow the /dev/server/xen_webserver1 logical volume. Then I entered the console for the webserver (xm console webserver1) and rebooted it into runlevel 1 and then used fdisk to delete the PV's partition (/dev/xvda2) and recreate it (with the same start cylinder) to fill the rest of the now larger disk. After rebooting again (within the virtual 'webserver' machine), I logged in as root and ran pvresize /dev/xvda2 and the physical volume was resized to match the larger partition size after which I could then use that space from within LVM on the webserver.


I was curious about performance issues with running Xen, especially CPU and disk overhead. I've got my results here if you're interested.

Stumble it! XFN Friendly Powered by DJBDNS Powered by Zope Valid CSS! Website Security Test

Served by:  Zope 2.7.6

Page Copyright © 2014, Michael T. Babcock. All Rights Reserved.

To contact me, send an E-mail to sawyoursite at this domain.

If you'd really like your mail server reported for spam, send me some junk mail to junk-yum@mikebabcock.me or devnull@mikebabcock.me. This site powered by djbdns