On 11/27/2013 12:46 PM, Alan Pevec wrote:
2013/11/27 Sean Dague <[email protected]>:
The problem is you can't really support both iso8601 was dormant for
years, and the revived version isn't compatible with the old version.
So supporting both means basically forking iso8601 and maintaining you
own version of it monkey patched in your own tree.
Right, hence glance was added https://review.openstack.org/55998 to
unblock the previous gate failure.
Issue now is that stable/grizzly Tempest uses clients from git trunk,
which is not going to work since trunk will add more and more
incompatible dependencies, even if backward compatbility is preserved
against the old service APIs!
I think when we decided to unpin clients and said that current clients
should work with older servers, we really wanted that to mean "current
client can talk the REST API of older servers so users don't have to
deal with this" but we ended up with "current clients can be installed
in the same python env as older servers", and implemented the
compatibility testing assuming the latter.
Solutions could be that Tempest installs clients into separate venv to
avoid dependecy conflicts or establish stable/* branches for
clients[1] which are created around OpenStack release time.
We might be able to get the gate testing to work with a separate venv,
but I don't know enough to be sure. Even if we could do that, users
could have the same problem if they try to install a current library on
a machine with an older server. It is a problem that we are stuck in the
python version of http://en.wikipedia.org/wiki/DLL_Hell but where there
is not even an attempt by some libraries to be compatible. Or am I
missing something? Is there some way to support side-by-side libraries
the way Microsoft eventually did to get out of this mess?
-David
Cheers,
Alan
[1] we have those for openstack client packages in Fedora/RDO
e.g. https://github.com/redhat-openstack/python-novaclient/branches
Here's nice explanation by Jakub: http://openstack.redhat.com/Clients
On Wed, Nov 27, 2013 at 1:58 AM, Yaguang Tang
<[email protected]> wrote:
after update to iso8601>=0.1.8, it breaks stable/neutron jenkins tests,
because stable/glance requires iso8601<=0.1.4, log info
https://jenkins02.openstack.org/job/periodic-tempest-devstack-vm-neutron-stable-grizzly/43/console,
I have filed a bug to track this
https://bugs.launchpad.net/glance/+bug/1255419.
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