Hi,
I have to apologize in advance for my general ignorance of syslog or
rsyslog specifically.
I'm using python logging [1] to write to syslog in cloud-init [2].
I've noticed a problem in the development version of ubuntu that has
rsyslog 5.8.6, that does not exist in the Ubuntu 11.10 release that has
rsyslog 5.8.1 [3].
The issue can be seen by running the attached test case.
If you run it like:
$ ./python-logging-syslog.py foobar
You'll see output to the console of:
[MYTAG] python-logging-syslog.py[DEBUG]: foobar
and in /var/log/syslog, you see a message like:
Dec 19 19:01:21 server-3418 ogging-syslog.py[DEBUG]: foobar
strace led me to see that the python-logging messages do not have a
TIMESTAMP field directly after the PRIVAL. As a result, 16 characters are
getting chopped from the incoming message.
It seems that rsyslog was previously more forgiving there and allow
messages without a TIMESTAMP.
The Ubuntu and Debian default rsyslog.conf has
$ModLoad imuxsock
And I'm writing to syslog in python through /dev/log.
I've not tested, but it looks to me like this behavior might have changed
it would seem that commit 54cee2ce69c5bbd96aa51ac8636f4b029e2ceb7 [4]
might be the source of the change.
Is it intended that messages require the TIMESTAMP field now?
--
[1] http://docs.python.org/library/logging.html
[2] https://launchpad.net/cloud-init
[3] http://pad.lv/905419
[4]
http://git.adiscon.com/?p=rsyslog.git;a=commit;h=54cee2ce69c5bbd96aa51ac8636f4b029e2ceb75
#!/usr/bin/python
import logging, logging.config, StringIO, sys
logcfg = """
[loggers]
keys=root
[handlers]
keys=consoleHandler,syslogHandler
[formatters]
keys=simpleFormatter
[logger_root]
level=DEBUG
handlers=consoleHandler,syslogHandler
[handler_consoleHandler]
class=StreamHandler
level=DEBUG
formatter=simpleFormatter
args=(sys.stderr,)
[formatter_simpleFormatter]
format=[MYTAG] %(filename)s[%(levelname)s]: %(message)s
[handler_syslogHandler]
class=handlers.SysLogHandler
level=DEBUG
formatter=simpleFormatter
args=("/dev/log", handlers.SysLogHandler.LOG_USER)
"""
logging.config.fileConfig(StringIO.StringIO(logcfg))
msg="Hello World"
if len(sys.argv) > 1: msg = ' '.join(sys.argv[1:])
logging.debug(msg)
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