Docker Compose - Work With Multiple Containers

So far, in our articles on Docker Container, we have dealt with one container at a time. However, Docker provides us with the flexibility to deal with and run multiple containers as well as using a tool to work on them called Docker Compose. Consequently, in this article, we are going to discuss this in detail. We will cover the following topics:

  • What is a Docker Compose?
  • Installing Docker Compose
  • What are its main features?
  • Docker-Compose command
  • How to set environment variables in Docker-Compose?
  • Syntax rules for .env file
  • How to use Docker Compose?
  • Where should we use Docker Compose?
  • Should it be used in production?
  • Docker-compose config: multiple compose files
  • Multiple compose file
  • Extending services using “extends”
  • What is the difference between Dockerfile and Docker Compose?

What is a Docker Compose?

It is a tool that defines and executes Docker applications with multiple (more than one) containers. Additionally, e use a configuration file “YAML” with the compose for configuring Docker application’s services. Moreover, when we use YAML, we can create and start all the application services with a single command.

Docker Compose runs multiple containers as a single service. So, for example, if the application requires MySQL and NUnit, we can start both the containers at once as a service using the YAML file. Moreover, we need not start each container separately.

#docker #docker compose #containers

Docker Compose - Work With Multiple Containers