Bug 1014699

So the issue here was the newly added dependency on the parallel installable python-jinja2-26. The simplest short term fix would be just to revert that change back to python-jinja (2.2), but since we're testing this fix we might as well align more with modern systems (and upstream test) and use the available python-jinja2-26 correctly. RDO was updated accordingly also.

It seems like I encountered the same issue:

Version
=======
rhos 4.0 on rhel 6.5, 2013-11-08.1 puddle,
openstack-neutron-2013.2-5.el6ost
openstack-neutron-vpn-agent-2013.2-5.el6ost
openstack-nova-api-2013.2-4.el6ost.noarch
python-novaclient-2.15.0-1.el6ost.noarch
openstack-nova-common-2013.2-4.el6ost.noarch
openstack-nova-conductor-2013.2-4.el6ost.noarch
openstack-nova-novncproxy-2013.2-4.el6ost.noarch
openstack-nova-cert-2013.2-4.el6ost.noarch
python-nova-2013.2-4.el6ost.noarch
openstack-nova-console-2013.2-4.el6ost.noarch
openstack-nova-scheduler-2013.2-4.el6ost.noarch


The default vpn_device_driver is an openswag driver (vpn_device_driver=neutron.services.vpn.device_drivers.ipsec.OpenSwanDriver), however, it's neutron vpn agent fails to load/import it because this driver uses the puthon jinja2 driver which fails to be imported.

It looks like the following jinja2 rpm (python-jinja2-26-2.6-2.el6ost.noarch) is installed in my env, but it's installed into an egg instead of regualarly on the site-packages directory: /usr/lib/python2.6/site-packages/Jinja2-2.6-py2.6.egg, hence any import of jinja2 fails - even manually when the site-packages is in my PYTHONPATH.


The class load exception from /var/log/neutron/vpn-agent.log:

2013-11-13 11:02:32.472 26715 CRITICAL neutron [-] Can not load driver :neutron.services.vpn.device_drivers.ipsec.OpenSwanDriver
2013-11-13 11:02:32.472 26715 TRACE neutron Traceback (most recent call last):
2013-11-13 11:02:32.472 26715 TRACE neutron   File "/usr/bin/neutron-vpn-agent", line 10, in <module>
2013-11-13 11:02:32.472 26715 TRACE neutron     sys.exit(main())
2013-11-13 11:02:32.472 26715 TRACE neutron   File "/usr/lib/python2.6/site-packages/neutron/services/vpn/agent.py", line 148, in main
2013-11-13 11:02:32.472 26715 TRACE neutron     manager='neutron.services.vpn.agent.VPNAgent')
2013-11-13 11:02:32.472 26715 TRACE neutron   File "/usr/lib/python2.6/site-packages/neutron/agent/l3_agent.py", line 876, in main
2013-11-13 11:02:32.472 26715 TRACE neutron     manager=manager)
2013-11-13 11:02:32.472 26715 TRACE neutron   File "/usr/lib/python2.6/site-packages/neutron/service.py", line 204, in create
2013-11-13 11:02:32.472 26715 TRACE neutron     periodic_fuzzy_delay=periodic_fuzzy_delay)
2013-11-13 11:02:32.472 26715 TRACE neutron   File "/usr/lib/python2.6/site-packages/neutron/service.py", line 137, in __init__
2013-11-13 11:02:32.472 26715 TRACE neutron     self.manager = manager_class(host=host, *args, **kwargs)
2013-11-13 11:02:32.472 26715 TRACE neutron   File "/usr/lib/python2.6/site-packages/neutron/services/vpn/agent.py", line 37, in __init__
2013-11-13 11:02:32.472 26715 TRACE neutron     self.setup_device_drivers(host)
2013-11-13 11:02:32.472 26715 TRACE neutron   File "/usr/lib/python2.6/site-packages/neutron/services/vpn/agent.py", line 57, in setup_device_drivers
2013-11-13 11:02:32.472 26715 TRACE neutron     device_driver=device_driver)
2013-11-13 11:02:32.472 26715 TRACE neutron DeviceDriverImportError: Can not load driver :neutron.services.vpn.device_drivers.ipsec.OpenSwanDriver

https://github.com/redhat-openstack/quantum/commit/5c5194e0b5257939f55ff04f6d1d6011d376f1f8 needs to be adjusted:

--- a/neutron/__init__.py
+++ b/neutron/__init__.py
@@ -37,6 +37,7 @@ def replace_dist(requirement):
 replace_dist("WebOb >= 1.0")
 replace_dist("SQLAlchemy >= 0.6.3")
 replace_dist("Routes >= 1.12.3")
+replace_dist("Jinja2 >= 2.6")
 
 replace_dist("PasteDeploy >= 1.5.0")
 # This hack is needed because replace_dist() results in

(In reply to Alan Pevec from comment #5)
> https://github.com/redhat-openstack/quantum/commit/
> 5c5194e0b5257939f55ff04f6d1d6011d376f1f8 needs to be adjusted:
> 
> --- a/neutron/__init__.py
> +++ b/neutron/__init__.py
> @@ -37,6 +37,7 @@ def replace_dist(requirement):
>  replace_dist("WebOb >= 1.0")
>  replace_dist("SQLAlchemy >= 0.6.3")
>  replace_dist("Routes >= 1.12.3")
> +replace_dist("Jinja2 >= 2.6")
>  
>  replace_dist("PasteDeploy >= 1.5.0")
>  # This hack is needed because replace_dist() results in

I've tried to add this line manually, now neutron vpn agent loads the openswag driver well.

Thanks Rami.
Padraig, I've noticed el6-havana-patches wasn't rebased to 2013.2 so I did that and amended "use parallel installed versions in RHEL6" patch.

Looks correct Alan thanks. jinja2 is in upstream neutron requirements.txt,
and the parallel package is already depended on by the neutron package.
So we should just need to respin RDO and then RHOS packages with this.
Will do now

Adding to beta milestone for MODIFIED/ON-QA bugs

Rami, plz try to verify tomorrow

I verified that this does not reproduce on rhos 4.0 on rhel 6.5 with puddle 2013-11-18.8.
Pbrady, could you please change this bug to ON_QA for me to be able to change it to Verified?

All clear now, there was related followup fix in openstack-neutron rhbz 1031370

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHEA-2013-1859.html