Cannot start MESG Core on Digital Ocean with Docker image

[antho1404]

When using Digital Ocean and the built in docker image we have an error when running MESG Core.

Error response from daemon: could not choose an IP address to advertise since this system has multiple addresses on interface eth0 (xxx.xxx.xxx.xxx and yyy.yyy.yyy.yyy)

This is because of the initialization of swarm where we need to precise the address that we want.

[antho1404]

Current workaround is to initialize the swarm manually and give the address that we want

docker swarm init --advertise-addr xxx.xxx.xxx.xxx

[NicolasMahe]

What about removing swarm init in the core?
We could just return an good error message with the command to execute to init the swarm node with the advertise-addr flag.

https://github.com/mesg-foundation/core/blob/b862779ad7dadd2445810d1e750bab59dc94c3cf/container/container.go#L95-L111

[NicolasMahe]

@antho1404 what do you think about:

What about removing swarm init in the core?
We could just return an good error message with the command to execute to init the swarm node with the advertise-addr flag.

[antho1404]

I think we can easily catch this error and return a nice error for the user and ask them to run docker swarm. So I agree to remove the docker swarm init but we still need to check if we are on a swarm (services depends on that)