Hi @maxb , thank for you reply, i have done some testing and been able to proceed my upgrade following this path:
- server: 1.8.6 to 1.10.12 and 1.10.12 to 1.14.2
- agent: once the servers were in 1.14.2, upgrade agent from 1.8.6 to 1.14.2
We use only consul for discovery so consul connect and peering have been disabled on the server side.
No majors issues encounter during the upgrade except CPU saturation during rhe agent upgrade on one of our big cluster ( + 2000 members)