I moved to a perl-based solution because that's a bit neater than shell: http://steve.org.uk/Software/slaughter/ http://steve.org.uk/Software/slaughter/ I fin

I moved to a perl-based solution because that's a bit neater than shell: http://steve.org.uk/Software/slaughter/ http://steve.org.uk/Software/slaughter/ I find it works well, each node pulls configuration from github, an rsync share, or similar, and executes locally. So there's no master in the traditional sense.