We have seen in the preceding sections how to create Docker containers separately by running command-line Docker commands (or from Eclipse plugins). If you want to run multiple containers on a host machine, you should consider using Docker Compose. It allows you to configure multiple Docker containers in one file and also specify dependencies between them. A docker-compose command reads configuration/instructions from docker-compose.yml, and creates and runs containers. The .yml file requires the version number of docker-compose at the top, followed by a services section, which lists container definitions—specifying image or Dockerfile location, environment variables to be set in the container, ports to be exposed and mapped to the host OS, and many other configurations. See https://docs.docker.com/compose/overview/ for more details.
In this section, we will use docker-compose to run MySQL and our webservice containers together. In the later chapter...