Configuring OpenStack to Use the Xen Project Hypervisor
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OpenStack and Xen Stefano Stabellini & Anthony Perard Feb 2015
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Transcript of Configuring OpenStack to Use the Xen Project Hypervisor
OpenStack and Xen
Stefano Stabellini & Anthony Perard
Feb 2015
© 2014 Citrix. Confidential. 2
Why Xen?
Xen is a type-1 hypervisor
small footprint (Less then 100K LOC)
GPLv2
Powers the largest public cloud in production (>50% of vendors listed in Gartner 2014 Cloud magic
quadrant, more in terms of hosts)
© 2014 Citrix. Confidential. 3
Make Xen the best hypervisor for OpenStack
© 2014 Citrix. Confidential. 4
OpenStack
© 2014 Citrix. Confidential. 5
OpenStack
© 2014 Citrix. Confidential. 6
OpenStack
© 2014 Citrix. Confidential. 7
OpenStack
© 2014 Citrix. Confidential. 8
OpenStack
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OpenStack
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OpenStack
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OpenStack
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Status and Goals
Xen via Libvirt is currently in Group C
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
© 2014 Citrix. Confidential. 13
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
© 2014 Citrix. Confidential. 14
From 0 to Xen and OpenStack What we actually did
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
5. Fix Bugs!!
© 2014 Citrix. Confidential. 15
Bugs
2 Xen related bug in Nova
1 Xen related bug in Libvirt
Stability issues with libvirt 1.2.2-0ubuntu13.1.8 under stress
© 2014 Citrix. Confidential. 16
Bugs
2 Xen related bug in Nova
1 Xen related bug in Libvirt
Stability issues with libvirt 1.2.2-0ubuntu13.1.8 under stress
FIXED!
© 2014 Citrix. Confidential. 17
Bugs
2 Xen related bug in Nova
1 Xen related bug in Libvirt
Stability issues with libvirt 1.2.2-0ubuntu13.1.8 under stress
FIXED!
© 2014 Citrix. Confidential. 18
Latest Update
2 patches under review for Nova
1 patch upstream in Libvirt
everything works out of the box! Using the latest OpenStack and libvirt trees
Tempest runs and *all* tests pass!
© 2014 Citrix. Confidential. 19
Tuning OpenStack and Xen
• Dom0 Memory: 1-4G dom0_mem=1024M
• Dom0 vcpus: 4 dom0_max_vcpus=4 dom0_vcpus_pin
• use LVM for local storage VOLUME_GROUP=volume_group_name
• PV vs HVM guests nova image-meta set vm_mode=HVM
nova image-meta delete vm_mode
© 2014 Citrix. Confidential. 20
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
Demo
© 2014 Citrix. Confidential. 22
Questions?
© 2014 Citrix. Confidential. 23
WORK BETTER. LIVE BETTER.
