On 06/14/2012 07:19 PM, Juliano Martinez wrote:
Roman and Gary,
I found the python2.6 on EPEL and also tested it on XS and XCP, using
python2.6 from EPEL will solve this issue and we don't have to change
lots lines of code to keep the compatibility.
What do we need to use it?
yum --enablerepo=base -y install mx
yum --enablerepo=epel -y install python26 python26-sqlalchemy
python26-mysqldb
IMHO it will be the cleanest way to have quantum on XS and XCP ( and
we already are using EPEL on we will not have any problems with it )
This changed wont affect anything on the system, and python2.6 will be
use only by quantum, the system will keep using python2.4.
What do you guys think about use it?
Great idea! I suggest to try and get some more feedback from guys who
are more familiar than me regarding XS and XCP
[]'s
Juliano
On Jun 14, 2012, at 2:14 AM, Gary Kotton wrote:
On 06/13/2012 11:53 AM, Roman Sokolkov wrote:
Gary, thanks for the answer!
Do I understand right about quote below?
2. I have yet to understand how Quantum runs on XCP with nova
compute. Have the Quantum agent run in the same context as nova
compute and send the "networking" commands in a similar way that
they are done by the nova vif driver for Xen.
To be on the safe side, i will explain our schema. We use XCP as
compute nodes with separate VM inside XCP for nova-compute service.
What's about quantum server, it works on external node with
nova-network service. Quantum agent(OVS) has started on XCP node and
polls db. As I understand nova-compute takes info about instances
vifs from xenapi and this info falled into db, so agent simply
pulled db and made some stuff like port plugging, VLAN tagging and
flow management. As for nova vif driver for XEN as I know it uses
xenapi for all stuff. Do you mean implement it to agent and start it
inside nova-compute VM?
Thanks for the clarification. The issue of 2.4 was discussed a bit
after the meeting on Monday.
Recently I saw commits that make new agent dependencies from quantum
libs. eg,
https://github.com/openstack/quantum/commit/b3366921472f1cb61bc96598d511594e1d478989
It made more and more difficult to patch it.
At the moment there is no automatic enforcement of 2.4. At the moment
we are starting to use more modules from openstack-common (for
example common configuration, rpc etc.) This may also prove
challenging for the 2.4 compatibility.
Thanks, Roman Sokolkov
2012/6/7 Gary Kotton <gkot...@redhat.com <mailto:gkot...@redhat.com>>
On 06/06/2012 11:25 PM, Roman Sokolkov wrote:
Hello!
XCP uses only Python 2.4. But upstream version of quantum
ovs agent is unsupported by Python 2.4. What do you think
about? Could we keep it in supported? And what about
refactoring code in favor using RPC calls? Will it be
possible to use RPC with Python 2.4 ?
I am currently implementing a blueprint
(https://blueprints.launchpad.net/quantum/+spec/scalable-agent-comms)
that improves quantum agents (by using RPC calls). There are a
number of issues that we need to address here:
1. The python 2.4 support:
i. There is a bug open that requires enforcing that the
agents run in 2.4
ii. Is this something that should be enforced by Quantum or
is there another way of addressing this? Below are a few ideas:
1. Using patched versions for 2.4 support.
2. I have yet to understand how Quantum runs on XCP with
nova compute. Have the Quantum agent run in the same context as
nova compute and send the "networking" commands in a similar way
that they are done by the nova vif driver for Xen.
3. Continue the enforcement (which has yet to be implemented)
I am in favor of item #2. This would require some
development, but I think that it is doable and gives the most
fleixibility to all.
2. RPC code:
i. There is a raging debate in OpenStack if this code should
be part of openstack-common (I am certainly in favor of it as it
will help us achive our goals and they have done some great work)
ii. This is currently pending a review (pending the above)
iii. This makes use of the cfg>CONF global structure (I am in
the process of addressiing this in Quantum -
https://blueprints.launchpad.net/quantum/+spec/use-common-cfg
(NOTE that we also need to validate the 2.4 here :)
Thanks
Aluta Continua
Gary
We are using XCP and have patched version of upstream agent
worked with Python 2.4.
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Regards, Roman Sokolkov
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