Add directive to define domain for container name

[sashaaro]

Container name is required indicator. Will be convenient to have access by container name as subdomain. I rename domain directive to hostname_domain. domain work as domain for container's names

[kevinjqiu]

Hey @sashaaro I don't quite understand this change. Is there a case where hostname_domain and domain would be set differently? Could you give an example where both are configured, and when a container is launched, what DNS names would it get?

Thanks!

[sashaaro]

For example from https://www.portainer.io/installation/ .

docker unix:///var/run/docker.sock {
    domain docker.loc
}

docker run -d --name my-portainer portainer/portainer

Would be resolved by my-portainer.docker.loc It is mean every container can be resolved by same rule with his name (most right column in picture bottom). If you didn't specify name to container, docker assign random name.

Same for hostname_domain directive but it use --hostname instead of --name for subdomin. Work as domain before

docker unix:///var/run/docker.sock {
    hostname_domain docker-host.loc
}

docker run -d --hostname my-portainer portainer/portainer

Would be resolved by my-portainer.docker-host.loc

It is not clearly from readme file?!

[kevinjqiu]

Thanks for the explanation.

It is not clearly from readme file?!

No need to be abrasive here.

[sashaaro]

Want to readme would be clear for everyone