Bind DNS upgrade


at my job Ive been tasked with upgrading bind form 9.9.10 to 9.16.
we have a primary and 3 slaves which handle all of the requests.

if we upgrade each of the hosts one at a time, will they play together?

In my experience slaves will work with latest available files even if they can’t speak to master. It’s just zone files after all, you can copy them to brand new master if you need to.

And can’t say anything about those specific versions, but:

  1. Schedule your upgrade during off hours, i find Saturday night usually best.
  2. Make backup of your system, best if its VM, fast and easy recovery if something is bugged (happens). Or virtualize your machine if not, and test upgrade on that.
  3. Test everything before off time is over.

Good luck