New Relic's basic agent (and the free 30 days of Pro we got up front) have been a huge help on one of my largest ongoing projects. Wanting more insight into our server after a mystery incident yesterday morning, I've started adding plugins. I started with a plugin for Postgres (because that seemed to be the source of our mystery); I had to use this one because we're on a shared host with WebFaction. It all went fine after I figured out how to get Ruby's bundle/ bundler installed in a local account and then I even daemonized it with a simple script. That gave me a bunch of statistics on our two databases and a number of pretty graphs. I have no idea what any of it means yet, but I'll take the info and figure out what it means (and maybe finish reading PostgreSQL 9.0 High Performance). Plus the plugin provides alerts via New Relic so that's a handy bit of insight by itself.
Happy with that plugin, I'm now in the process of installing a suite of plugins for New Relic. Happily those are provided in Python. Even better, it's all install-able via pip. On the downside, you hate to see a bug report like this on the front page:
Version 1.0.12 has a SERIOUS uninstallation bug in the file manifest that will remove all the files on your filesystem if you try and do a pip remove newrelic_plugin_agent.
So there's that. In addition, the package assumes you own the box. Because I do not, I need to be a bit smarter and give them a hand. In my .bash_profile I have the following:
export PIP_PATH=/home/groundenergy/lib/python2.7. This is where I want things to be installed rather than the default Python path. In theory that should be enough to pass in to allow
pip install newrelic-plugin-agent --install-option="--prefix=$PIP_PATH" to work. Except this package assumes you're either installing into a virtualenv or want to install into /opt. I'm not doing either. I tend to be a bit lazy about virtualenvs on production servers, which I am starting to question, but that's not really relevant here. In order to get around the problem, I did the following before installing:
That's where I am right now but I figured the post might help someone and it gives me a place to add further notes.←