如何连接到运行 mysql 的 Docker？

Question

The instructions here: https://hub.docker.com/_/mysql indicate to run

$ docker run -it --network some-network --rm mysql mysql -hsome-mysql-container -uexample-user -p

But i have no idea what some-network is? So i run this instead and get and 'unknown MySQL host' error even though some-mysql-container is definitely the name of my container.

$ docker run -it--rm mysql mysql -hsome-mysql-container -uexample-user -p

What am I doing wrong here?

Answer 1

'some-network' refers to a docker-network. You need to create it first. I named it 'mysql-network' to make its purpose a bit more clear:

docker network create mysql-network

Then, start database container:

docker run --network mysql-network --name mysql-db -e MYSQL_ROOT_PASSWORD=mysecretpassword -d mysql

Then, start a the client container to connect to the first one:

docker run -it --network mysql-network --rm mysql mysql -hmysql-db -uroot -p

By adding both containers to the same network, they are able to communicate with each other.