The doc states that:

The Prefect platform runs a variety of automatic services to ensure workflow semantics are respected robustly. The Scheduler is present in both Prefect Core's server and Cloud, while the others are exclusive to Prefect Cloud.

https://docs.prefect.io/orchestration/concepts/services.html I take that to mean that Lazarus and Zombie Killer are not part of Prefect Server. Yet, I am seeing logs like this on my server (and also seeing the Lazarus switch / option in the Flow settings page in the UI):

towel_1    | {"severity": "DEBUG", "name": "prefect-server.Lazarus", "message": "Sleeping for 600.0 seconds..."}
towel_1    | {"severity": "DEBUG", "name": "prefect-server.ZombieKiller", "message": "Sleeping for 120.0 seconds..."}

Are Lazarus and Zombie Killer running on Prefect server?

Hi @Leonard Marcq - yes, in the most recent release of Server we began moving compatible services into it. The docs are out of date and we will have a look.

Very cool! Thank you