Ganglia Monitoring Without Multicast on Unix Systems

gangliamonitoringunix

I'm running Ganglia 3.1.2 on a network where there is no multicast (nor can I turn it on). Does anyone have an elegant solution for getting ganglia to work correctly? I found this:

http://code.google.com/p/ganglia-multicast-hack/

but it does not scale very well.

Right now, I have separate data_source lines for each host on my network in my gmetad.conf file, but that too does not scale well, and I can't get accurate summary statistics, because it keeps overwriting the rrds (although the host statistics work just fine).

Any pointers would be greatly appreciated (or confirmation that I have found the best solution already).

Thanks!

Best Answer

After further research, I found the answer. On my clients, I added the following to gmond.conf:

udp_send_channel {
  host = monitoring-host
  port = 8666
  ttl = 1
}

udp_send_channel {
  host = monitoring-host-backup
  port = 8666
  ttl = 1
}

This sends the data via unicast UDP to the monitoring host and the backup every 1 second.

Then on the monitoring host, I added this:

udp_recv_channel {
  port = 8666
}

The key is to get rid of the multicast entry, which is there by default.

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