We're currently using Hyperic 2.7.6 in our production environment (happily i might add), and i want to test out the upgrade to 3.0. However i cannot find a document that describes the correct 2.7 -> 3.0 upgrade process for your whole environment.
Do you start by disabling every agent, then upgrade the server first, then each agent? Is it a problem if a 2.7 agent tries to connect to the 3.0 server, will that cause issues?
From what i gather the correct process for any single platform is just to run the 3.0 installer with the -upgrade flag, but even that is only mentioned in passing in the release notes - and there its about beta -> beta upgrades.
Your site says that 3.0 is GA, but at the same time the amount of information in the install guide for upgrades seems to be lacking. It seems that the latest 3.0 build is one of the first to support 2.7 -> 3.0 upgrades, is it just that the process needs to be ironed out a little more before a document is put together -- or am i just looking in the wrong place?