How to reach additional containers by the hostname after docker-compose scale?

Question

I'm using the docker-compose 1.6 with docker 1.10.1 and version 2 of docker-compose.yml.

As described in Networking in Compose, new network is created and all containers are assigned hostnames in it after docker-compose up.

How can I reach additional (i.e. scaled) containers via hostnames after docker-compose scale <component>=2?

Answer 1

When using "scale", internal docker dns service resolves only full names like projectname_db_1, projectname_db_2 and so on. Certainly, it would be better to provide in addition resolving service name + index without project name prefix.