Xen and OpenStack

OpenStack and Xen

Stefano Stabellini

August 2015

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Make Xen the best hypervisor for OpenStack

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OpenStack

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OpenStack

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OpenStack

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OpenStack

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OpenStack

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OpenStack

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OpenStack

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OpenStack

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Goals

• Xen should be a great platform for OpenStack production deployments • Get Xen via Libvirt in Group A within 1 year

• Xen should be a great platform for OpenStack development and hacking • devstack should deploy Xen and OpenStack

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Status and Progress

Jan 2015: Xen via Libvirt still in Group C

• No automated testing at all

• Bugs in Nova and Libvirt prevented OpenStack

from working out of the box with Xen via Libvirt

• Tempest could not be run on OpenStack with Xen via Libvirt

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Status and progress

Jun 2015: Xen via Libvirt is in Group B

• everything works out of the box! Using the latest OpenStack and libvirt trees

• Tempest runs and *all* tests pass!

• The Xen Project CI-loop is up and running

• The Xen Project CI-loop has voting rights

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Xen Project OpenStack CI-loop

http://jenkins.openstack.xenproject.org

http://wiki.xenproject.org/wiki/

OpenStack_CI_Loop_for_Xen-Libvirt

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Xen Project OpenStack CI-loop What it means to be “voting”

http://review.openstack.org

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From 0 to Xen and OpenStack

1. Install Ubuntu 14.04 LTS

2. Install Xen apt-get install xen-hypervisor-4.4-amd64

3. git clone devstack && configure it to use Xen LIBVIRT_TYPE=xen

4. ./stack.sh

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Tuning OpenStack and Xen

• Dom0 Memory: 1-4G dom0_mem=2048M

• Dom0 vcpus: 4 dom0_max_vcpus=4 dom0_vcpus_pin

• use LVM for local storage volume_group=<volume_group_name> # /etc/cinder/cinder.conf

• PV vs HVM guests nova image-meta set vm_mode=HVM

nova image-meta delete vm_mode

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More information

www.xenproject.org

wiki.xenproject.org wiki.xenproject.org/wiki/Tuning_Xen_for_Performance

wiki.xenproject.org/wiki/OpenStack

http://lists.xenproject.org/mailman/listinfo/xen-devel

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OpenStack Working Group We need help!

http://lists.xenproject.org/mailman/listinfo/wg-openstack

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Questions?

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