XenServer/GateIntegration

Backround for Nodepool

The standard Nodepool population looks like:

• Launch server
• Bootstrap server
• Snapshot server
• Populate pool from snapshot
• Node is ready when it's accessible through SSH

Whereas, we need some additional entry points:

• Launch server
• ✪ Install server - This phase will install XenServer on the server
• ✪ Poll install status - As installing XenServer includes rebooting the server, the best way to figure out when the installation is finished, is to try to connect to the server through ssh, and check if a specific status file exists.
• Bootstrap instance
• ✪ Pre-snapshot script and timeout - Before taking a snapshot, we need to halt the server. Therefore we execute a halt in dom0, and ask nodepool to wait for a specified timeout. The timeout should be enough for the server to halt.
• Snapshot server
• Populate pool from snapshot
• ✪ Poll status file on node launch - As starting the image invlolves an automatic reboot, we again need a proper way to make sure, that XenServer is up and running. This could be achieved with the same polling mechanism that we used for Poll install status.
• Node is ready when it's accessible through SSH

Changes to Requirements

• ⌛ - WAITING - https://review.openstack.org/68181 - Add XenAPI package to requirements - this way, it will be cached by Openstack's PyPi mirror.

Changes to DevStack

• ✔ - MERGED - https://review.openstack.org/68136 - modify devstack, so gate will pre-cache the image (cirros vhd tgz)
• ✘ - MISSING - Move dom0 modifications to stack.sh
  • The incubator for the modifications is here: https://github.com/citrix-openstack/xenapi-os-testing/blob/master/launch-node.sh Search for the string:

    SSH_DOM0

    to find dom zero modifications.

Changes to Config

• ✘ - OUTDATED - https://review.openstack.org/60581 - Script to convert an image to a XenServer
  • The incubator for this script is here: https://github.com/citrix-openstack/xenapi-in-the-cloud
  • The incubator needs to be tagged, and released, the changeset should be updated
• ✘ - OUTDATED - https://review.openstack.org/60902 - Add node type of devstack-xenserver
• ✘ - OUTDATED - https://review.openstack.org/60903 - Add in a new job to run tests on XenServer

Changes to Nodepool

• ⌛ - WAITING - Install phase - execute a script, that converts the node to a XenServer, and use polling to find out when it's finished: https://review.openstack.org/61463
• ✘ - MISSING - Pre-snapshot script and timeout - The script will halt the node, and the wait will make sure, that the machine has enough time to halt. It's safe to snapshot a halted server.
• ⌛ - WAITING - Support status file polling on node launch: https://review.openstack.org/65261

Changes to DevStack-Gate

• ✘ - OUTDATED - https://review.openstack.org/60900 - Support XenAPI driver in gate: localrc generation. - The incubator for these changes is here: https://github.com/matelakat/devstack-gate/tree/xenserver-integration