It happens.
You have a Master -> Slave MySQL replication and your master crashes
for a reason or another.
I had this use case where I needed to retrieve the output of a command on multiple servers as part of a python library.
I’m going to try this blog thingy again.
Thanks to the hard work of the puppet-openstack community, Puppet was the preferred method of deployment for Openstack in the latest Openstack User Survey.