devstack/tools/xen

Getting Started With XenServer 5.6 and Devstack

The purpose of the code in this directory it to help developers bootstrap a XenServer 5.6 + Openstack development environment. This file gives some pointers on how to get started.

Xenserver is a Type 1 hypervisor, so it needs to be installed on bare metal. The Openstack services are configured to run within a "privileged" virtual machine on the Xenserver host (called OS domU). The VM uses the XAPI toolstack to communicate with the host.

Step 1: Install Xenserver

Install XenServer 5.6+ on a clean box. You can get XenServer by signing up for an account on citrix.com, and then visiting: https://www.citrix.com/English/ss/downloads/details.asp?downloadId=2311504&productId=683148

For details on installation, see: http://wiki.openstack.org/XenServer/Install

Here are some sample Xenserver network settings for when you are just getting started (I use settings like this with a lappy + cheap wifi router):

• XenServer Host IP: 192.168.1.10
• XenServer Netmask: 255.255.255.0
• XenServer Gateway: 192.168.1.1
• XenServer DNS: 192.168.1.1

Note:

It is advisable (and necessary if you are using Xenserver 6.0, due to space limitations), to create the above mentioned OS domU, on a separate dev machine. To do this, you will need to run Steps 2 on the dev machine (if required) as well as the Xenserver host. Steps 3 and 4 should be run on the dev machine. This process requires you to be root on the dev machine.

Step 2: Prepare DOM0

At this point, your host is missing some critical software that you will need to run devstack (like git). Do this to install required software:

wget --no-check-certificate https://raw.github.com/openstack-dev/devstack/master/tools/xen/prepare_dom0.sh
chmod 755 prepare_dom0.sh
./prepare_dom0.sh

This step will also clone devstack in $DEVSTACKSRCROOT/devstack. $DEVSTACKSRCROOT=/root by default.

Step 3: Configure your localrc

Devstack uses a localrc for user-specific configuration. Note that the XENAPI_PASSWORD must be your dom0 root password. Of course, use real passwords if this machine is exposed.

cat > $DEVSTACKSRCROOT/devstack/localrc <<EOF
MYSQL_PASSWORD=my_super_secret
SERVICE_TOKEN=my_super_secret
ADMIN_PASSWORD=my_super_secret
RABBIT_PASSWORD=my_super_secret
# This is the password for your guest (for both stack and root users)
GUEST_PASSWORD=my_super_secret
# IMPORTANT: The following must be set to your dom0 root password!
XENAPI_PASSWORD=my_super_secret
# Do not download the usual images yet!
IMAGE_URLS=""
# Explicitly set virt driver here
VIRT_DRIVER=xenserver
# Explicitly set multi-host
MULTI_HOST=1
# Give extra time for boot
ACTIVE_TIMEOUT=45
# Interface on which you would like to access services
HOST_IP_IFACE=ethX
EOF

Step 4: Run ./build_xva.sh

This script prepares your nova xva image. If you run this on a different machine, copy the resulting xva file to tools/xen/xvas/[GUEST_NAME].xva (by default tools/xen/xvas/ALLINONE.xva) on the Xenserver host.

cd $DEVSTACKSRCROOT/devstack/tools/xen ./build_xva.sh

You will also need to copy your localrc to the Xenserver host.

Step 5: Run ./build_domU.sh

This script does a lot of stuff, it is probably best to read it in its entirety. But in a nutshell, it performs the following:

• Configures bridges and vlans for public, private, and management nets
• Creates and installs a OpenStack all-in-one domU in an HA-FlatDHCP configuration
• A script to create a multi-domU (ie. head node separated from compute) configuration is coming soon!

cd $DEVSTACKSRCROOT/devstack/tools/xen ./build_domU.sh

Step 6: Do cloudy stuff!

• Play with horizon
• Play with the CLI
• Log bugs to devstack and core projects, and submit fixes!

Ubuntu 11.10 VM on Xenserver

Run ./scripts/xenoneirictemplate.sh on your Xenserver host. This creates a template to be able to install a Ubuntu Oneiric (11.10) virtual machine. Once the template is created, follow the wizard to complete the network install.