Last modified: 2013-12-16 07:43:14 UTC
I was testing an instance (toolsbeta-puppettestbed) for Ganglia statistics of a Redis server with "import redis::ganglia". The instance had the Ubuntu package python-redis installed from earlier, unrelated tests. This led to ganglia-monitor, upon reading /etc/ganglia/conf.d/redis.pyconf's: | modules { | module { | name = "redis" | language = "python" | param host { value = "127.0.0.1" } | param port { value = 6379 } | } | } to import the Python module redis from the Ubuntu package, but not the module of the same name in /usr/lib/ganglia/python_modules/redis.py. Symptoms were /var/log/upstart/ganglia-monitor.log containing: | [PYTHON] Can't find the metric_init function in the python module [redis]. | Unable to find the metric information for 'connected_clients'. Possible that the module has not been loaded. | [...] but in fact *a* module had been loaded, just not the "right" one. Two immediate possible solutions: a) Rename /usr/lib/ganglia/python_modules/redis.py to redis_monitoring.py or something similar; b) liaison with upstream Ganglia so that /usr/lib/ganglia/python_modules gets higher priority in Python's path.
(In reply to comment #0) > Two immediate possible solutions: > > a) Rename /usr/lib/ganglia/python_modules/redis.py to redis_monitoring.py or > something similar; Yep. That's a nice, simple fix. > b) liaison with upstream Ganglia so that /usr/lib/ganglia/python_modules gets > higher priority in Python's path. Upstream: https://github.com/ganglia/monitor-core/issues/22
Change 77657 had a related patch set uploaded by Ori.livneh: Rename 'redis.py' to 'redis_monitoring.py' to avoid conflict https://gerrit.wikimedia.org/r/77657
Change 77657 merged by Faidon: Rename 'redis.py' to 'redis_monitoring.py' to avoid conflict https://gerrit.wikimedia.org/r/77657
