K8s Upgrade - Coggle Diagram
Questions to ask
How much downtime can be afforded
What kind of applications are running?
What is the underlying infra provider
What was the learnings from previous upgrade/install?
For B/G upgrades do you have enough spare infra
Any customisations on OS level
Are node configurations manually updated?
Exiting infra diagram
What are the dependent downstream/upstream applications
What distribution of K8s?
IS OCP Version 3.x
Blue green upgrade
In place upgrade
helm update for rancher control plane
No upgrade method available
Is OCP version => 4.x