This took lots of figuring out, so I'm going to document it here.
Install debugging gems
Show archive.org snapshot
on vagrant server (optionally add them to the Gemfile)
Apparently they need to be the pre-release versions, but I'll experiment with this as the opportunity presents itself.
gem install ruby-debug-base19x --pre
gem install ruby-debug-ide --pre
Add remote SDK in RubyMine Show archive.org snapshot
Set-up remote debug config Show archive.org snapshot
Run debug command on vagrant
rdebug-ide --host 0.0.0.0 --port 1234 --dispatcher-port 26162 -- $COMMAND$
$COMMAND$ will be script/rails server or bin/rails server depending on the version of rails, with optional parameters such as -b 0.0.0.0
Posted by Daniel to Foxsoft (2016-01-14 14:29)