Open Stack

Hi,


I'm reaching out for help with a strange issue I've found.  Running
openstack queens, on ubuntu xenial.

We have a bunch of different sites with the same set-up, recently upgraded
from mitaka to queens.  However, on this one site, after the upgrade, we
cannot start neutron-server.  The reason is, that the ml2 plugin throws an
error because it can't find auth_url from the keystone_authtoken section of
neutron.conf.  However, it is there in the file.

The ml2 plugin is calico, it fails with this error:

2020-02-20 20:14:22.495 2964911 ERROR
networking_calico.plugins.ml2.drivers.calico.mech_calico [-] Exception in
function %s: TypeError: expected string or buffer
2020-02-20 20:14:22.495 2964911 ERROR
networking_calico.plugins.ml2.drivers.calico.mech_calico Traceback (most
recent call last):
2020-02-20 20:14:22.495 2964911 ERROR
networking_calico.plugins.ml2.drivers.calico.mech_calico   File
"/usr/lib/python2.7/dist-packages/networking_calico/logutils.py", line 21,
in wrapped
2020-02-20 20:14:22.495 2964911 ERROR
networking_calico.plugins.ml2.drivers.calico.mech_calico     return
fn(*args, **kwargs)
2020-02-20 20:14:22.495 2964911 ERROR
networking_calico.plugins.ml2.drivers.calico.mech_calico   File
"/usr/lib/python2.7/dist-packages/networking_calico/plugins/ml2/drivers/calico/mech_calico.py",
line 347, in _post_fork_init
2020-02-20 20:14:22.495 2964911 ERROR
networking_calico.plugins.ml2.drivers.calico.mech_calico
auth_url=re.sub(r'/v3/?$', '', auth_url) +
2020-02-20 20:14:22.495 2964911 ERROR
networking_calico.plugins.ml2.drivers.calico.mech_calico   File
"/usr/lib/python2.7/re.py", line 155, in sub
2020-02-20 20:14:22.495 2964911 ERROR
networking_calico.plugins.ml2.drivers.calico.mech_calico     return
_compile(pattern, flags).sub(repl, string, count)
2020-02-20 20:14:22.495 2964911 ERROR
networking_calico.plugins.ml2.drivers.calico.mech_calico TypeError:
expected string or buffer


When you look at the code, this is because neither auth_url or is found
in cfg.CONF.keystone_authtoken.  The config defintely exists.

I have copied the neutron.conf config from a working site, same error.  I
have copied the entire /etc/neutron directory from a working site, same
error.

I have check with strace, and  /etc/neutron/neutron.conf is the
only neutron.conf being parsed.

Here is the keystone_authtoken part of the config:

[keystone_authtoken]
auth_uri=https://api-srv-cloud.host.domain:5000
region_name=openstack
memcached_servers=1.2.3.4:11211
auth_type=password
auth_url=https://api-srv-cloud.host.domain:5000
username=neutron
password=xxxxxxxxxxxxxxxxxxxxxxxxx
user_domain_name=Default
project_name=services
project_domain_name=Default


I'm struggling to understand how the auth_url config is really registered
in via oslo_config.
I found an excellent exchagne on the ML here:

https://openstack.nimeyo.com/115150/openstack-keystone-devstack-confusion-auth_url-middleware

This seems to indicate auth_url is only registered if a particular auth
plugin requires it.  But I can't find the plugin code that does it, so I'm
not sure how/where to debug it properly.

If anyone has any ideas, I would really appreciate some input or pointers.

Thanks!


Cheers,
Just

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