Comment 8 for bug 1565911

There are problems in oslo library related to encoding:

1. If in python 2.7 I try to log string like:

logging.warning('test message with unicode %s', u'☢ ☯ ☭ ∑ ∞ ♀ ♂ ♥'.encode('utf8'))

it's ok, but with olso:

from oslo_log import log as logging
LOG = logging.getLogger(__name__)
LOG.warning('test message with unicode %s', u'☢ ☯ ☭ ∑ ∞ ♀ ♂ ♥'.encode('utf8'))

UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position
0: ordinal not in range(128)

On https://github.com/openstack/oslo.log/blob/master/oslo_log/log.py#L129
ensure_unicode is only for message but not for args.

2. If I replace previous code to:

LOG.warning(u'test message with unicode ☢ ☯ ☭ ∑ ∞ ♀ ♂ ♥'.encode('utf8'))

with syslog, I've got error like:
ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_log/handlers.py", line 57, in emit
ERROR oslo_messaging.rpc.dispatcher self.format(record))
ERROR oslo_messaging.rpc.dispatcher TypeError: [priority,] message string

May be it's related to https://bugs.launchpad.net/oslo.log/+bug/1483842.

I'll make workraround to remove non ascii characters in log.