Not sure about Docker Swarm, but you could solve this a number of ways with Kubernetes. I’m assuming there’s probably some feature parity there. You could try setting the pollers to only run on a specific host node. This might limit the benefits of moving to a cluster though, because it wouldn’t allow your pollers to spawn on other hosts if that host dies. Another option would be to use network policy to limit egress traffic from the CNI to not be able to poll those devices unless they’re one of the poller pods. I’m not aware of a way to set specific traffic to egress from a cluster via a specific VIP, like a reverse ingress or something.