IMAGE_URLS could be set both in localrc with customization or stackrc by default. By setting DOWNLOAD_DEFAULT_IMAGES, user could choose to add default images to IMAGE_URLS or overwrite them. As uploading duplicate images will cause a "409 Conflict" error, a duplicate detection will expose it earlier. Care needs to be taken that you don't end up with a duplicate image, so clean up Xen's README. Depends-On: I6fbae12f950a03afab39f341132746d3db9f788c Change-Id: I3ca4e576aa3fb8992c08ca44900a8c53dd4b4163 Closes-Bug: #1473432
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Getting Started With XenServer and Devstack
The purpose of the code in this directory it to help developers bootstrap a XenServer 6.2 (older versions may also work) + OpenStack development environment. This file gives some pointers on how to get started.
Xenserver is a Type 1 hypervisor, so it is best installed on bare metal. The
OpenStack services are configured to run within a virtual machine (called OS
domU) on the XenServer host. The VM uses the XAPI toolstack to communicate with
the host over a network connection (see MGT_BRIDGE_OR_NET_NAME
).
The provided localrc helps to build a basic environment.
Introduction
Requirements
- An internet-enabled network with a DHCP server on it
- XenServer box plugged in to the same network
This network will be used as the OpenStack management network. The VM Network
and the Public Network will not be connected to any physical interfaces, only
new virtual networks will be created by the
install_os_domU.sh
script.
Steps to follow
- Install XenServer
- Download Devstack to XenServer
- Customise
localrc
- Start
install_os_domU.sh
script
Brief explanation
The install_os_domU.sh
script will:
- Setup XenAPI plugins
- Create the named networks, if they don't exist
- Preseed-Netinstall an Ubuntu Virtual Machine (NOTE: you can save and reuse
it, see Reuse the Ubuntu VM), with 1 network
interface:
eth0
- Connected toUBUNTU_INST_BRIDGE_OR_NET_NAME
, defaults toMGT_BRIDGE_OR_NET_NAME
- After the Ubuntu install process finished, the network configuration is
modified to:
eth0
- Management interface, connected toMGT_BRIDGE_OR_NET_NAME
. Xapi must be accessible through this network.eth1
- VM interface, connected toVM_BRIDGE_OR_NET_NAME
eth2
- Public interface, connected toPUB_BRIDGE_OR_NET_NAME
- Start devstack inside the created OpenStack VM
Step 1: Install Xenserver
Install XenServer on a clean box. You can download the latest XenServer for free from: http://www.xenserver.org/
The XenServer IP configuration depends on your local network setup. If you are
using dhcp, make a reservation for XenServer, so its IP address won't change
over time. Make a note of the XenServer's IP address, as it has to be specified
in localrc
. The other option is to manually specify the IP setup for the
XenServer box. Please make sure, that a gateway and a nameserver is configured,
as install_os_domU.sh
will connect to github.com to get source-code snapshots.
Step 2: Download devstack
On your XenServer host, run the following commands as root:
wget --no-check-certificate https://github.com/openstack-dev/devstack/zipball/master
unzip -o master -d ./devstack
cd devstack/*/
Step 3: Configure your localrc inside the devstack directory
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 > ./localrc <<EOF
# At the moment, we depend on github's snapshot function.
GIT_BASE="http://github.com"
# Passwords
# NOTE: these need to be specified, otherwise devstack will try
# to prompt for these passwords, blocking the install process.
MYSQL_PASSWORD=my_super_secret
SERVICE_TOKEN=my_super_secret
ADMIN_PASSWORD=my_super_secret
SERVICE_PASSWORD=my_super_secret
RABBIT_PASSWORD=my_super_secret
SWIFT_HASH="66a3d6b56c1f479c8b4e70ab5c2000f5"
# This will be the password for the OpenStack VM (both stack and root users)
GUEST_PASSWORD=my_super_secret
# XenAPI parameters
# NOTE: The following must be set to your XenServer root password!
XENAPI_PASSWORD=my_xenserver_root_password
XENAPI_CONNECTION_URL="http://address_of_your_xenserver"
VNCSERVER_PROXYCLIENT_ADDRESS=address_of_your_xenserver
# Explicitly set virt driver
VIRT_DRIVER=xenserver
# Explicitly enable multi-host for nova-network HA
MULTI_HOST=1
# Give extra time for boot
ACTIVE_TIMEOUT=45
EOF
Step 4: Run ./install_os_domU.sh
from the tools/xen
directory
cd tools/xen
./install_os_domU.sh
Once this script finishes executing, log into the VM (openstack domU) that it installed and tail the run.sh.log file. You will need to wait until it run.sh has finished executing.
Appendix
This section contains useful information for running devstack in CI environments / using ubuntu network mirrors.
Use a specific Ubuntu mirror for installation
To speed up the Ubuntu installation, you can use a specific mirror. To specify
a mirror explicitly, include the following settings in your localrc
file:
UBUNTU_INST_HTTP_HOSTNAME="archive.ubuntu.com"
UBUNTU_INST_HTTP_DIRECTORY="/ubuntu"
These variables set the mirror/http/hostname
and mirror/http/directory
settings in the ubuntu preseed file. The minimal ubuntu VM will use the
specified parameters.
Use an http proxy to speed up Ubuntu installation
To further speed up the Ubuntu VM and package installation, an internal http
proxy could be used. squid-deb-proxy
has prooven to be stable. To use an http
proxy, specify:
UBUNTU_INST_HTTP_PROXY="http://ubuntu-proxy.somedomain.com:8000"
in your localrc
file.
Reuse the Ubuntu VM
Performing a minimal ubuntu installation could take a lot of time, depending on
your mirror/network speed. If you run install_os_domU.sh
script on a clean
hypervisor, you can speed up the installation, by re-using the ubuntu vm from
a previous installation.
Export the Ubuntu VM to an XVA
Given you have an nfs export TEMPLATE_NFS_DIR
:
TEMPLATE_FILENAME=devstack-jeos.xva
TEMPLATE_NAME=jeos_template_for_devstack
mountdir=$(mktemp -d)
mount -t nfs "$TEMPLATE_NFS_DIR" "$mountdir"
VM="$(xe template-list name-label="$TEMPLATE_NAME" --minimal)"
xe template-export template-uuid=$VM filename="$mountdir/$TEMPLATE_FILENAME"
umount "$mountdir"
rm -rf "$mountdir"
Import the Ubuntu VM
Given you have an nfs export TEMPLATE_NFS_DIR
where you exported the Ubuntu
VM as TEMPLATE_FILENAME
:
mountdir=$(mktemp -d)
mount -t nfs "$TEMPLATE_NFS_DIR" "$mountdir"
xe vm-import filename="$mountdir/$TEMPLATE_FILENAME"
umount "$mountdir"
rm -rf "$mountdir"