I haven't used the log tailer, but in principle it should work if you configure Tomcat logging correctly. The overhead of tailing log files shouldn't be significant for low volume web sites. For high volumes, the embedded sFlow modules scale better.
There are currently sFlow implementations for Apache, Tomcat, NGINX, HAproxy, and Node.js: http://www.sflow.net/relatedlinks.php F5 and A10 load balancers also support sFlow. On Sun, Jan 3, 2016 at 10:06 PM, Aaron <hawaiiaa...@gmail.com> wrote: > Peter, > Would the log tailer work for tomcat as well? > Would you recommend sflow over the log tailer? > Thanks! > > On Thu, Dec 31, 2015 at 3:27 PM, Peter Phaal <peter.ph...@gmail.com> wrote: >> >> Vladimir's blog has a solution that involves tailing the Apache log files: >> http://vuksan.com/linux/ganglia/#Apache_Traffic_Stats >> >> The sFlow protocol packs a large number of metrics in each UDP >> datagram, so you should see a reduction in UDP datagrams per second >> associated with monitoring. The C based mod-sflow / host-sflow agents >> have a small memory and CPU footprint. >> >> On Thu, Dec 31, 2015 at 3:14 PM, Aaron <hawaiiaa...@gmail.com> wrote: >> > Thanks Peter. Is there a way to use more a pure ganglia solution? Will >> > sflow generate more udp traffic and/or cpu cycles? >> > >> > On Thu, Dec 31, 2015 at 12:05 PM, Peter Phaal <peter.ph...@gmail.com> >> > wrote: >> >> >> >> You could use a combination of Host sFlow and mod-sflow on your Apache >> >> web servers: >> >> http://www.sflow.net/ >> >> https://github.com/sflow/mod-sflow >> >> >> >> The following article describes how to configure the head-end gmond: >> >> http://blog.sflow.com/2011/12/using-ganglia-to-monitor-web-farms.html >> >> >> >> mod-sflow also exports Apache worker pool stats to Ganglia: >> >> http://blog.sflow.com/2012/10/thread-pools.html >> >> >> >> mod-sflow also exports URL, referrer, user-agent, response time and >> >> status code information that you can use to derive metrics for each >> >> web service. You could use sFlow-RT to calculate the derived metrics >> >> and proxy them to gmetad: >> >> >> >> >> >> http://blog.sflow.com/2015/12/using-proxy-to-feed-metrics-into-ganglia.html >> >> >> >> On Thu, Dec 31, 2015 at 10:40 AM, Aaron <hawaiiaa...@gmail.com> wrote: >> >> > Hi, I would like to monitor linux apache servers where the apache >> >> > servers >> >> > would have gmond running, and the stats would be reported back to the >> >> > ganglia server running gmetad and ganglia web to be displayed in a >> >> > graph. >> >> > Is there a php or python script to do this? Any recommendations? >> >> > >> >> > Thanks, Aaron >> >> > >> >> > >> >> > >> >> > ------------------------------------------------------------------------------ >> >> > >> >> > _______________________________________________ >> >> > Ganglia-general mailing list >> >> > Ganglia-general@lists.sourceforge.net >> >> > https://lists.sourceforge.net/lists/listinfo/ganglia-general >> >> > >> > >> > > > ------------------------------------------------------------------------------ _______________________________________________ Ganglia-general mailing list Ganglia-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-general
