Migrating live processes with Zenoh in widely distributed network

It is relatively easy to migrate running Elixir/Erlang processes between BEAM VMs on an Erlang Cluster. However, configuring an Erlang cluster across a wide-area distributed environment is not necessarily straightforward. For example, NAPT is troublesome.

Not only routers and firewalls, but also Carrier Grade NAPT (CGN), introduced by ISPs due to IPv4 address exhaustion, prevent clustering of BEAM nodes across different networks under different CGNs.

Industrial systems often employ the Publisher/Subscriber (Pub/Sub) communication method. Using Pub/Sub enables more flexible process migration on a widely distributed network. We demonstrate that using Eclipse Zenoh for Pub/Sub communication allows flexible migration of GenServer processes.