This phase of the zero downtime upgrade focuses on upgrading each engine in the cluster. To maintain resource availability, perform this set of steps on one engine at a time until all engines are successfully upgraded.
Engines are identified by the engine name. Ensure that the engine that you remove from the load balancer aligns with the engine definition you import.
This phase requires that the following steps take place for each engine in the cluster, one at a time:
- Remove the engine from the load balancer
- Upgrade the engine
- Resuming configuration replication
- Add the engine to the load balancer
Do not begin the upgrade of an additional engine until the active engine upgrade is completed and the engine is reporting to the PingAccess administrative node.