CDH 5.3 packages are now available for Trusty, woot! I'd like to upgrade all analytics machines to Trusty first, and then upgrade to CDH 5.3. I will use this task to track and plan work on both. I would like to do-release-upgrade these, as I have had a good experience doing this on stat* boxes, and it will much simpler to not have to reinstall the OS for these nodes.
There are several services in the Analytics Cluster, and upgrades to those should be planned and done as units. Let's start from easiest to hardest.
analytics1003 and analytics1026 don't host any (real) production critical services. Let's do those first. I should be able to upgrade those without much fanfare. Once those are done, let's do analytics1027. Once that is done, then we will discuss the next steps.