In this chapter, we covered monitoring Flume agents both from the process level and the monitoring of internal metrics (whether it is working).

Monit and Nagios were introduced as open source options for process watching.

Next, we covered the Flume agent internal monitoring metrics with Ganglia and JSON over HTTP implementations that ship with Apache Flume.

Finally, we covered how to integrate a custom monitoring implementation if you need to directly integrate to some other tool that's not supported by Flume by default.

In our final chapter, we will discuss some general considerations for your Flume deployment.