Installing Debian Squeeze (6.0) domU On CentOS 5.5 x86_64 dom0

This tutorial shows how to create a Debian Squeeze (6.0) domU on dom0 running CentOS 5.5 x86_64.

When installing Debian 6.0 domU on CentOS 5.5 x86_64 the following problems may arise:

Debian 6.0 uses Grub 2 and Xen 3.1.2 (default version on CentOS 5.5) will not be able to boot newly installed system using pygrub. When following official Debian documentation, the installed system may use wrong architecture and may not have Xen images installed at all.

The following command is used to launch the installation:

xm create -c /etc/xen/xm-debian.cfg install=true \
install-mirror=ftp://ftp.us.debian.org/debian \
install-installer=ftp://ftp.us.debian.org/debian/dists/squeeze/main/installer-amd64/20110106+b1/images

It will look for images in subdirectory netboot/xen. This directory also contains file xm-debian.cfg. Download this file and adjust disk, vif and other sections to suit your needs. This file is already filled with correct values for release (squeeze) and architecture (amd64). The file can also be adjusted to use preferred mirror.

After the system is installed and the domU is shut down, check if Xen kernel images have been installed and install them if necessary. After the images have been installed, copy them to /boot directory on dom0 and modify the Xen config to use custom kernel and ramdisk instead of pygrub.

kpartx -av /dev/data_vg/myvm-root
mount /dev/mapper/myvm-root1 /mnt
chroot /mnt
apt-get install linux-image-2.6.32-5-xen-amd64
exit
cp /mnt/boot/*xen* /boot
kpartx -d /dev/data_vg/myvm-root

Installing the xen kernel will generate the initrd image appropriate for domU.

The example Xen config:

name = "myvm" maxmem = 1024 memory = 1024 vcpus = 1 kernel = "/boot/vmlinuz-2.6.32-5-xen-amd64" root = "/dev/xvda1 ro" ramdisk = "/boot/initrd.img-2.6.32-5-xen-amd64" on_poweroff = "destroy" on_reboot = "restart" on_crash = "restart" disk = [ "phy:/dev/data_vg/myvm-root,xvda,w", "phy:/dev/data_vg/myvm-swap,xvdb,w"]

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The Perfect Server - OpenSUSE 11.4 x86_64 [ISPConfig 2]

This is a detailed description about how to set up an OpenSUSE 11.4 server (x86_64) that offers all services needed by ISPs and hosters: Apache web server (SSL-capable), Postfix mail server with SMTP-AUTH and TLS, BIND DNS server, Proftpd FTP server, MySQL server, Dovecot POP3/IMAP, Quota, Firewall, etc. In the end you should have a system that works reliably, and if you like you can install the free webhosting control panel ISPConfig 2 (i.e., ISPConfig runs on it out of the box).

I will use the following software:

Web Server: Apache 2.2.17 with PHP 5.3.5, Ruby, and Python Database Server: MySQL 5.1.53Mail Server: PostfixDNS Server: BIND9FTP Server: proftpd POP3/IMAP: I will use Maildir format and therefore install Courier-POP3/Courier-IMAP.Webalizer for web site statistics

Please note that this setup does not work for ISPConfig 3! It is valid for ISPConfig 2 only!

I want to say first that this is not the only way of setting up such a system. There are many ways of achieving this goal but this is the way I take. I do not issue any guarantee that this will work for you!

To install such a system you will need the following:

In this tutorial I use the hostname server1.example.com with the IP address 192.168.0.100 and the gateway 192.168.0.1. These settings might differ for you, so you have to replace them where appropriate.

Boot from your OpenSUSE 11.4 DVD and select Installation:

Select your language, keyboard layout and accept the licence terms:

The installer analyzes your hardware and builds the software repository cache:

Select New Installation:

Select the region and timezone:

We select Other > Minimal Server Selection (Text Mode) here as we want to install a server without X-Window desktop. The X-Window system is not necessary to run the server and would slow down the system. We will do all administration tasks on the shell or through an SSH connection, e.g. via PuTTY from a remote desktop.

The Perfect Server - OpenSUSE 11.4 x86_64 [ISPConfig 2] - Page 2

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