For influxdb, they now produces official arm packages, so there is no need to build it yourself. For Pi, the article on aymerick’s blog deals with an old version of Grafana and things have changed a bit since then.
If you are on raspbian/jessie, it is relatively easy to build merely following the official build instructions. The only thing to be careful about is to get a PhantomJS for your pi and have it in your path, before the npm setup. On raspbian/wheezy, it is a bit more involved since Grafana requires a c++11 compliant g++. I wrote some explanation on how I proceed for wheezy and jessie.
For those not inclined in building the packages themself, you can have a look at the one I put on github which is for wheezy or jessie, tested by me on a raspberry pi 2 and reported to work on raspberry pi 3.