hi @omarmhaimdat !!
Welcome to our community 
I started playing around with deploying a multi node using docker swarm, using as a base our multi node docker compose example.
While the docker compose without swarm works just fine, I was also not able to spin it on docker swarm, also with some connectivity issues and nodes not being able to reach its peers.
I will dig further into this topic this week, and will report my findings here.
I also agree that while K8s is a great tools for such a deployment, it may be overkill in some scenarios 
Thanks!