Hello,

We've deployed Munin Server and nodes to improve MongoDB monitoring. installed mongo plugins from here: http://docs.mongodb.org/ecosystem/tools/munin/

Unfortunately mongo monitoring plugins fail with errors. I've made sure that python scripts (plugins) point to correct mongo port and host, but they always produce similar errors. Here is the error when running mongo_lock manually using python 2.6.6 and 3.4.0:

Python 2.6.6
Traceback (most recent call last):
File "mongo_lock", line 45, in <module>
doData()
File "mongo_lock", line 20, in doData
status = getServerStatus()
File "mongo_lock", line 15, in getServerStatus
return json.loads( raw )["serverStatus"]
File "/usr/lib64/python2.6/json/_init_.py", line 307, in loads
return _default_decoder.decode(s)
File "/usr/lib64/python2.6/json/decoder.py", line 319, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib64/python2.6/json/decoder.py", line 338, in raw_decode
raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded

Python 3.4.0
File "mongo_lock", line 25
print name + ".value " + str( 100 * ratio )
^
SyntaxError: invalid syntax

Are these plugins only compatible with specific version of python and/or MongoDB?
Any advise would be appreciated.