Heroku buildpack: l2met-shuttle

This is a Heroku buildpack that allows an app to use l2met-shuttle to extract metrics and deliver them to a configured URL.

First you need to set this buildpack as your initial buildpack with:

$ heroku buildpacks:add -i 1 heroku-community/l2met-shuttle

You also need to define the URL of your L2met compatible endpoint:

$ heroku config:set L2MET_SHUTTLE_URL=<url>

Next, for each process that emit metrics, you will need to preface the command in your Procfile with start-l2met-shuttle. In this example, we want only the web process to send metrics through l2met-shuttle.

$ cat Procfile
web:    ./bin/start-l2met-shuttle bundle exec unicorn -p $PORT -c ./config/unicorn.rb -E $RACK_ENV
worker: bundle exec rake worker

Rebuild your app for the changes to take effect.