Are rolling updates possible with managed VMs?

Question

We began using managed VMs over the sandboxed environment and experienced that even though multiple instances of the application were running, the platform didn't roll them out in a rolling fashion so we hit 503s on a regular base while deploying.

Are we missing something in terms of health checks or the like?

Answer 1

Managed VMs (Flex environment) does not yet support full rolling updates. The recommended way would be to always deploy into a new incremental version, ensure that new version is serving fine and then start ramping up production traffic to it using traffic splitting feature.