So …my previous post was similar to this, but you most likely dont want to run the salt-master and nagios on the same server, so I had to find a way to let the nagios-server execute its plugins on hosts via the salt-master. This can be done using the python client api and saltstacks own peer communication system.
First of all, read this : http://docs.saltstack.com/ref/peer.html
Then check out my wrapper here : https://github.com/mortis1337/nagios-plugins/blob/master/check_by_saltpeer.py
Yay! Now you can throw away NRPE forever and stop using ssh-keys for the nagiosuser if you are doing that allready.
Nagiosplugins over zmq? I like it 