I’ve tested a few different monitoring tools for my Banana Pi servers. The ones I’ve looked at so far are pretty simple, but they would be OK if I was just monitoring one Pi.
I need to be able to monitor clusters of servers, so I’m going to take a look at Ganglia.
Banana Pi server cluster
I built a Raspberry Pi cluster a few months ago, and it’s been very reliable. Performance has been surprisingly good, and the cluster has shown to handle a reasonable amount of traffic.
I recently got my hands on four Banana Pis, a Raspberry Pi clone with a dual core processor and gigabit ethernet. I’ve built another cluster and got it on line at BanoffeePiServer.com. This cluster has half the number of nodes in the RPi cluster, but it’s much more powerful.
I’ve used a newer version of Pyplate CMS which is much more efficient, and I’ve used a much more efficient mechanism to synchronize the servers. Pyplate uses an SQLite database, so there’s no need for database replication. The entire CMS can be copied to each node with rsync.
This page explains how I built the Banana Pi cluster.
I finally got around to doing some testing with Nginx. I’ve written a description of how I set up Nginx on a Raspberry Pi.
I did a comparison of Nginx and Apache to see which would provide the best performance for my site. Nginx was fastest for static content and dynamic content.
I want to deploy Nginx on my cluster, but first I have to figure out some issues with cache headers. Hopefully I’ll get that worked out in the next few days. I’ve posted a question about it on stackoverflow: http://stackoverflow.com/questions/19995097/setting-the-expires-header-stops-nginx-passing-requests-to-uwsgi
The makers of the Pi Face interface board have built themselves a new site. They’ve linked to my site on this page – look for the picture of the robot buggy: http://www.piface.org.uk/products/piface_digital/