Compose is a tool for defining and running multi-container Docker applications. With Compose, you use a Compose file to configure your application’s services. Then, using a single command, you create and start all the services from your configuration. To learn more about all the features of Compose see the list of features.
Using Compose is basically a three-step process.
Dockerfile so it can be reproduced anywhere.docker-compose.yml so they can be run together in an isolated environment.docker-compose up and Compose will start and run your entire app.By default Compose sets up a single network for your app. Each container for a service joins the default network and is both reachable by other containers on that network, and discoverable by them at a hostname identical to the container name.
Links allow you to define extra aliases by which a service is reachable from another service. They are not required to enable services to communicate – by default, any service can reach any other service at that service’s name.