DEM Orchestrator works in the active-passive configuration and the passive DEM Orchestrator service is promoted to an active role automatically if the active DEM Orchestrator service fails.
The standby DEM Orchestrator is designed to poll the health of an active DEM Orchestrator via the IaaS database; once the status of the active DEM Orchestrator is marked offline in the database, the standby DEM will be instantly promoted to take over the active role. It will continue to be in the active role even if the failed node comes online (no failback).
It is quite easy to identify which DEM Orchestrator node is active and online; here are the steps:
Log in to the tenant portal (
https://CAFE.PKCt.LOCAL/vcac/org/Publishing
) as an Infrastructure administrator ([email protected]
).Navigate to Infrastructure | Monitoring | Distributed Execution Status. Name and Status of all the DEM Orchestrators and Workers will be listed.
Let's review...