Creating a server and agents across different hosts is impossible now

[dodo920306]

Since now the api engine call nodes with container names, creating a server and agents across different hosts is impossible. This is because with different agents and the server running on different hosts, they (as docker containers) cannot connect nodes as docker containers on another host.

Expected Behavior

Server and each agent can be deployed on their own hosts respectively.

Current Behavior

Creating a server and agents across different hosts is impossible.
Hyperledger Cello only works if all components are on the same machine.

Possible Solution

I can only think about docker swarm, but it requires users to do a lot of pre-operations.

Steps to Reproduce

1. Try to create nodes across multiple hosts.

Context (Environment)

any

[dodo920306]

@yeasy @YoungHypo

[yeasy]

Using docker swarm feature is a better solution.
Other potential way is like k8s.