I meant to post this a couple years ago, but since I haven't gotten to update it and "fix" things as thoroughly as I'd like, here's what I've been using in production tying nagios into ganglia.
http://www.nagiosexchange.org/Check_Plugins.21.0.html?&tx_netnagext_pi1[p_view]=1037 This is based on an older piece of GPL code I ran across that provided the basis for the XML parsing... it's not elegant but got me a head-start and serves its purpose to this day ;) This supports pulling any metric out of the gmetric XML directly. I wrote a plugin originally to query the RRD's, but found going this route to be a better solution for my purposes. Let me know if you have any requests, find any bugs, suggestions, etc. Cheers, /eli Vladimir wrote: > Bernard Li wrote: >> Can you explain a bit regarding how you integrate the Ganglia metrics >> into Nagios? Is this automated? >> > > What you have to know is that Nagios is just an alerting engine. Real > work for Nagios is done using Nagios plugins that provide the necessary > checks. Nagios simply schedules these checks depending on the > configuration and based on the return value of the script e.g. 0 for OK, > 1 for WARNING and 2 for CRITICAL, 3 for UNKNOWN etc. an alert is sent. > So what you have to do is write a script that is aware of Ganglia > metrics and is able to produce error codes. Since I couldn't get the > python script to give me raw metrics I needed to install whole Ganglia > suite on my Nagios box ie. gmond/gmetad with Web Interface. You also > need to install PHP interpreter (php-cli RPM for those uninitiated) Then > you do something like this > > > <?php > > $ganglia_web="/var/www/html/ganglia"; > include_once "$ganglia_web/conf.php"; > include_once "$ganglia_web/get_context.php"; > # This is important. You get cluster summary > $context = "cluster"; > include_once "$ganglia_web/functions.php"; > include_once "$ganglia_web/ganglia.php"; > include_once "$ganglia_web/get_ganglia.php"; > > print_r ($metrics) > > ?> > > Put this in a file then run > > php stuff.php > > And you get a nice array output of all Ganglia metrics. Then you just > pick them out. For instance I have used swap_free and disk_free in the > past. All you have to do is > > $hostname = "host.domain.com"; > print $metrics[$hostname]['swap_free']['VAL']; > > and voila you get swap_free value :-). Then you just write something > that checks against some value > > if ( $metrics[$hostname]['swap_free']['VAL'] > $argv[2] ) { > print ("SWAP OK"); > exit (0); > } else { > print "SWAP CRITICAL"; > exit (2); > } > > and you integrate this into Nagios. If I am motivated enough I'll write > a generic Ganglia Nagios script :-). > > Vladimir > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Ganglia-general mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ganglia-general > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
