As mentioned in PoC https://github.com/netobserv/flowlogs-pipeline/pull/266 , at the moment it's not possible / not easy to mix metrics with or without a pre-aggregation stage.

There are two issues spotted:

• confgen doesn't support it. It always creates the Aggregation stage, which breaks things for non-pre-aggregated metrics.
• if that results in creating two PromEncode stages (one following Aggregation, not the other), then we need to be able to re-use the same metrics server / port / registry, rather than having to configure 2 different metrics servers and prometheus scrape endpoints.