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ryanb · Post by **ryanb** » Thu Sep 10, 2015 1:07 pm

So, I figured out what the issue is. In initialize_source.py where rrdtool is called, there is no check for exceptions:

     46 def create_bandwidth_db(directory, name='bandwidth.rrd'):
     47     '''Creates the bandwidth DB for the source'''
     48     rrdtool.create( os.path.join(directory, name),
     49                     '--no-overwrite',
     50                     '--step', '300',
     51                     'DS:flows:GAUGE:600:0:U',
     52                     'DS:bytes:GAUGE:600:0:U',
     53                     'DS:packets:GAUGE:600:0:U',
     54                     'DS:bps:GAUGE:600:0:U',
     55                     'DS:pps:GAUGE:600:0:U',
     56                     'DS:bpp:GAUGE:600:0:U',
     57                     'RRA:AVERAGE:0.5:1:17531',
     58                     'RRA:AVERAGE:0.5:12:4380',
     59                     'RRA:AVERAGE:0.5:288:365',
     60                     'RRA:HWPREDICT:1440:0.1:0.0035:288' )

It seems that the --no-overwrite option is not valid:

Code: Select all

ERROR:root:unknown option '--no-overwrite'
Traceback (most recent call last):
  File "./test_init.py", line 61, in create_bandwidth_db
    'RRA:HWPREDICT:1440:0.1:0.0035:288' )
error: unknown option '--no-overwrite'
RRD Tool failed: unknown option '--no-overwrite'

When I remote that option from the command, it works.

ryanb · Post by **ryanb** » Thu Sep 10, 2015 1:14 pm

So, interestingly, I have rrdtool installed on my system and it does seem to support that option:

Code: Select all

$ rrdcreate --help
RRDtool 1.4.9  Copyright by Tobi Oetiker, 1997-2010

Usage: rrdcreate <filename>
                        [--start|-b start time]
                        [--step|-s step]
                        [--no-overwrite]
                        [DS:ds-name:DST:dst arguments]
                        [RRA:CF:cf arguments]

ERROR: unknown option '--help'

However, that isn't what the script is using. It seems to be using a Python module, and according to pydoc rrdtool, that option is not supported:

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<stuff deleted>
FUNCTIONS
    create(...)
        create(args..): Set up a new Round Robin Database
        create filename [--start|-b start time] [--step|-s step] [DS:ds-name:DST:heartbeat:min:max] [RRA:CF:xff:steps:rows]
 <more irrelevant stuff deleted>

VERSION
    1.4.9

Please advise.

ssax · Post by **ssax** » Thu Sep 10, 2015 3:35 pm

What is the output of this command?

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find /usr/local -name py_rrd*

ssax · Post by **ssax** » Thu Sep 10, 2015 3:36 pm

Also, what specific distro/version are you running?

ryanb · Post by **ryanb** » Thu Sep 10, 2015 4:55 pm

Running CentOS- fresh install from within the last few weeks. The only thing I installed has been NagiosXI, NA and Log Server. And also TCPDump for troubleshooting.

Code: Select all

# find /usr/local -name py_rrd*
/usr/local/lib64/python2.6/site-packages/py_rrdtool-0.2.2-py2.6.egg-info
# cat /etc/redhat-release
CentOS release 6.7 (Final)

Is rrdtool.create called on these files again at any time once they are created? If I have to manually create them using rrdtool from the commandline (or editing that script),that's fine. As long as it won't cause me a problem down the line.

jdalrymple · Post by **jdalrymple** » Thu Sep 10, 2015 4:58 pm

ryanb wrote:The only thing I installed has been NagiosXI, NA and Log Server.

On 1 host?

If so I think we found your problem... Our pieces of software integrate, but don't coexist well

ryanb · Post by **ryanb** » Fri Sep 11, 2015 8:55 am

Oh, I see. Yeah, they are all on the same server. It's not an option for me to move these to separate servers, but if I have to make a few tweaks here and there it is not a big deal. Do you have any documentation that will tell me what I need to look for and do to solve any other glitches like this?

Also, if I just create the bandwidth.rrd files manually using rrdtool from the commandline, should everything work properly? Or will this issue crop up down the road?

Thanks,
Ryan

ssax · Post by **ssax** » Fri Sep 11, 2015 10:20 am

It should work just fine as long as it's created with the same options and you set the permissions properly.

ryanb · Post by **ryanb** » Fri Sep 11, 2015 12:32 pm

OK, that works. I created a couple rrd files- in one case I used the script and just commented out the offending option, and in the other I copied and pasted the options into the commandline version of rrdtool. Both seem to be working fine.

Thanks for your help. Feel free to close this out.

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