docker networking

docker-networking.sh

# create network for containers
docker network create foobar

# launch mysql container within foobar network and set its name to 'database':
# you can also add --network-alias='mysql.foobar.local' to add a FQDN if you like.
docker run --detach --name=database --network=foobar --tmpfs=/var/lib/mysql/:rw,noexec,nosuid,size=7000m --env MYSQL_ALLOW_EMPTY_PASSWORD=1 --env MYSQL_DATABASE=foobar mysql:5.6 mysqld

# wait mysql to initialize innodb logs and become ready for connections:
sleep 5

# launch a second container in the same network and ping or telnet 'database' host:
docker run -it --network=foobar debian:stretch ping database