xen.py

from __future__ import with_statement

from fabric.api import *
from fabric.contrib.files import *

import system


def xen():
    """
    Install Xen server geared towards Ubuntu 8.04 and Ubuntu/CentOS guests.
    """
    # Install and configure basic Xen package set and xen-tools
    system.install("""
        ubuntu-xen-server
        lvm2
        debhelper
        rpm
        libterm-size-perl
        libtest-pod-perl
    """)
    # Rinse
    system.install_from_source(
        'http://archive.ubuntu.com/ubuntu/pool/universe/r/rinse/',
        ('rinse_1.7-1.dsc', 'rinse_1.7.orig.tar.gz', 'rinse_1.7-1.diff.gz'),
        'rinse'
    )
    upload_template('config/rinse.conf', '/etc/rinse/', {}, use_sudo=True)
    # CentOS repo file for use in VMs, and updated rinse post-install script
    # to copy it over. (has to be done here and not as a xen-tools-level
    # post-install hook, because rinse has its own postflight script that calls
    # yum...which then gets too-new packages. ugh.)
    upload_template('config/CentOS-Base.repo', '/etc/rinse/', {},
        use_sudo=True)
    pi = '/usr/lib/rinse/centos-5/post-install.sh'
    upload_template('config/post-install.sh', pi, {}, use_sudo=True)
    sudo('chmod +x %s' % pi)
    # Sigh...newer rinse goes in /usr/sbin but xen-tools looks in /usr/bin
    sudo('ln -fs /usr/sbin/rinse /usr/bin/rinse')
    # Xen-tools (upgrades/replaces older version installed via deps)
    system.install_from_source(
        'http://archive.ubuntu.com/ubuntu/pool/universe/x/xen-tools/',
        ('xen-tools_4.1-1.dsc', 'xen-tools_4.1.orig.tar.gz', 'xen-tools_4.1-1.diff.gz'),
        'xen-tools'
    )
    upload_template('config/xm.tmpl', '/etc/xen-tools/', {}, use_sudo=True)
    upload_template('config/xen-tools.conf', '/etc/xen-tools/', {},
        use_sudo=True)
    # Reboot into Xen proper
    reboot(120)
    # Set up LVM disk
    sudo('fdisk -l')
    question = "What is the VM storage volume ('sdX' format, no leading '/dev/')?"
    dev = "/dev/%s" % prompt(question)
    sudo('echo ",,8e" | sfdisk %s' % dev)
    sudo('pvcreate %s1' % dev)
    sudo('vgcreate vms %s1' % dev)