Comment 14 for bug 1195524

I did some testing and it turns out the hostname size seems to be the problem! I started a bunch of machines with a hostname of 64 characters and a bunch of machines with a hostname of 25 characters (with the script I linked above): all the machines with a hostname of 25 ended up in the state "Running" and all the others were stuck "Commissioning". Just to be sure, I had someone else confirm that behavior.

I did some more testing and I can now say that Azure is ok with hostnames up to 55 characters. A machine with a hostname of size 56 or more won't get out of the commissioning state.