Just a few notes on how to move your sonar installation to another machine without loosing any of your config and/or history. Some of that include the normal installation steps too. This list is specific to debian.

Add the sonar debian repo to your machine (/etc/apt/sources.list.d/sonar)

deb http://downloads.sourceforge.net/project/sonar-pkg/deb binary/

Update and install sonar (sonar pkg is not signed):

aptitude update && aptitude install sonar

Install postgresql and set up an account for your sonar:

Sonar doesn’t support merging of projects out of the box so when you happen to rename a project as I just did, you’re suddenly stuck with 2 projects of the same name unless you do a little bit of sql trickery in the back. Here’s how you do it (quick & dirty approach). What we’re going to to is: rename the old projects (with all the juicy metrics) to the new groupid/artifactid and delete the new one (which only has a handful of builds anyway and we can afford to loose these, but not the yearlong history we’ve collected):