Define Istio Upgrade Procedure
Istio is set to become a central piece of our infrastructure, and we need to identify a process to be able to keep it up to date without causing any downtime to our services.
In-Place upgrades can cause traffic interruption. Therefore is recommended to have at least 2 replicas of the istiod pod and to ensure that PodDisruptionBudgets are configured with a minimum availability of 1
An alternative is to perform Canary Upgrades, in a blue/green methodology.
Related Doc:
Edited by Marcel Chacon