If you have a complicated microservices topology, then yes you're going to need heavyweight infrastructure tools to manage the cross-service traffic, isolate an

If you have a complicated microservices topology, then yes you're going to need heavyweight infrastructure tools to manage the cross-service traffic, isolate and bin-pack heterogeneous workloads, etc. You probably don't need to have a complicated microservices topology though. A load balancer->stateless app tier->managed RDBMS architecture should be more than enough until you're at a point where you can afford to scale a serious infrastructure team.