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We should probably put something like this in the docs ...


-------- Original Message --------
Subject: [openstack-dev] Clarification of XenServer versions
Date: Tue, 3 Sep 2013 14:44:10 +0000
From: Bob Ball <bob.ball at citrix.com>
Reply-To: OpenStack Development Mailing List
<openstack-dev at lists.openstack.org>
To: OpenStack Development Mailing List
(openstack-dev at lists.openstack.org) <openstack-dev at lists.openstack.org>

I've received a number of questions recently about XenServer and XCP and
how they are different - particularly now that XS 6.2 has been released
- so thought I should try and get the answers all in one place.

XenServer:
As of XS 6.2, it was announced that it will be fully open sourced[1] and
all features are entirely free to use (i.e. there are no paid editions)
There is a new website at www.xenserver.org where the build and code is
available.

XCP:
As XS 6.2 is fully open source, no new versions of XCP will be
released[2].  You can install XS in XCP mode by selecting that option at
install time, and there is an upgrade path from XCP to XS 6.2.  We'd
recommend all XCP users to upgrade to XenServer 6.2

Xenserver-core[3]:
This is a method for building the core packages in a xenserver
installation on an existing RPM-based system.  Initial support for this
configuration (notably running nova services in domain 0) was recently
added in Havana[4].

Xcp-xapi/Kronos:
This is a method of installing an old snapshot of a xenserver-core like
system on Debian-based systems.  Xcp-xapi is not updated with the latest
changes in xapi and there will be a version of xenserver-core for
Debian/Ubuntu, which will be built from the main branch and therefore
continuously up to date, announced in the next few weeks.

I hope this answers any questions in one place, but if there are more
questions, just let me know!  I have updated the page at
https://wiki.openstack.org/wiki/XenServer/Install to make it a little
clearer and we will of course be making similar clarifications in the
install guide in the next few weeks.

Thanks,

Bob

[1] Some source code repositories may not be available until the end of
September:
http://xenserver.org/overview-xenserver-open-source-virtualization/source-code.html
[2]
http://xenserver.org/discuss-virtualization/q-and-a/i-am-a-user-of-xcp-how-will-i-be-impacted.html

[3]
http://xenserver.org/discuss-virtualization/virtualization-blog/entry/making-sense-of-xenserver-vs-xenserver-core-vs-citrix-xenserver.html
and
http://xenserver.org/discuss-virtualization/virtualization-blog/entry/tech-preview-of-xenserver-libvirt-ceph.html
- although if you intend to use xenserver-core, I'd recommend using the
latest snapshot described in
https://lists.xenserver.org/sympa/arc/xs-devel/2013-08/msg00027.html
[4] https://blueprints.launchpad.net/nova/+spec/xenserver-core

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