magnum pod-create fails with KeyError exception for user_name

[Dane LeBlanc]

If DevStack is used to instantiate the magnum plugin, and the devstack localrc/local.conf has the default values for:
   LOG_COLOR (default value = True)
   SYSLOG (default value = False)
then a magnum pod-create operation fails with a 500 error code (invalid syntax (line 2)), and the m-api.log log file
shows tracebacks for a "KeyError: 'user_name'" exception.

For example:

openstack@devstack-40:~/kubernetes/examples/redis$ magnum pod-create --manifest ./redis-master.yaml --bay testbay
ERROR: invalid syntax (line 2) (HTTP 500)
openstack@devstack-40:~/kubernetes/examples/redis$

The m-api.log file shows this traceback:

2015-06-08 10:31:33.707 [00;32mDEBUG magnum.cmd.api [[00;36m-[00;32m] [01;35m[00;32moslo_versionedobjects.fatal_exception_format_errors = False[00m [00;33mfrom (pid=16976) log_opt_values /usr/local/lib/python2.7/dist-packages/oslo_config/cfg.py:2221[00m
2015-06-08 10:31:33.707 [00;32mDEBUG magnum.cmd.api [[00;36m-[00;32m] [01;35m[00;32m********************************************************************************[00m [00;33mfrom (pid=16976) log_opt_values /usr/local/lib/python2.7/dist-packages/oslo_config/cfg.py:2223[00m
2015-06-08 10:31:33.707 [00;36mINFO magnum.cmd.api [[00;36m-[00;36m] [01;35m[00;36mserving on http://10.86.7.40:9511[00m
10.86.7.40 - - [08/Jun/2015 10:31:34] "GET / HTTP/1.1" 200 318
Traceback (most recent call last):
  File "/usr/lib/python2.7/logging/__init__.py", line 851, in emit
    msg = self.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/handlers.py", line 69, in format
    return logging.StreamHandler.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 724, in format
    return fmt.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/formatters.py", line 235, in format
    return logging.Formatter.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 467, in format
    s = self._fmt % record.__dict__
KeyError: 'user_name'
Logged from file session.py, line 195
Traceback (most recent call last):
  File "/usr/lib/python2.7/logging/__init__.py", line 851, in emit
    msg = self.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/handlers.py", line 69, in format
    return logging.StreamHandler.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 724, in format
    return fmt.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/formatters.py", line 235, in format
    return logging.Formatter.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 467, in format
    s = self._fmt % record.__dict__
KeyError: 'user_name'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/190801

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/190801
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=617b772e556a9cf874031a9068a9e31156242aa0
Submitter: Jenkins
Branch: master

commit 617b772e556a9cf874031a9068a9e31156242aa0
Author: Dane LeBlanc <email address hidden>
Date: Thu Jun 11 16:01:22 2015 -0400

    Modify magnum api context to use user_name and project_name

    Problem description:
    If DevStack is used to instantiate the magnum plugin, and the
    devstack localrc/local.conf has the default values for:
       LOG_COLOR (default value = True)
       SYSLOG (default value = False)
    then upon startup (i.e. running DevStack's stack.sh), the magnum devstack
    lib calls the DevStack common setup_colorized_logging function, but
    without passing the optional 'project_var' and 'user_var' arguments to
    this function. As a result, the setup_colorized_logging
    function uses its default values of "user_name" and "project_name"
    when it defines the logging_context_format_string (which in turn gets
    configured in /etc/magnum/magnum.conf). The problem is that "user_name"
    and "project_name" are not defined in the API context used by Magnum,
    so that whenever the magnum plugin does a logging call, a KeyError
    exception for the non-existant key "user_name" is generated.

    Fix description:
    The fix is to modify the Magnum context to use "user_name" and
    "project_name" attributes to be consistent with the default context
    format string set up by DevStack.

    Change-Id: Ia0c34899609735ff9d8b4597101e004e2684657e
    Closes-Bug: #1464376