We'll respond shortly.
Using ssh-add will make a ssh key available for a bash session. However, on our new OS X images the key will not be available in new bash sessions and has to be re-added.
It was suggested to check the ssh-config to see if something is resetting the key.
Compiling the mysql gem fails on an Ubuntu production box:
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.
If you first install
libmysqlclient-dev you will be able to install the mysql gem as usually.