You can customize containers for different environments or users by adding environment variables in the docker-compose file. To do so, set the project names to unique build numbers. If you are working on a CI server or a shared host, you want to make sure the builds do not interfere with each other. You can utilize this feature on a dev host to run stable copies of each feature branch of your project by creating multiple copies of the environment under different names. Set the project directory using the -project-directory environment variable.Set the project name using the -p command line option or the COMPOSE_PROJECT_NAME environment variable.Hosting Multiple Isolated Environments on a Single HostĬompose keeps environments isolated from one another on a single host using projects names.īy default, the project name is the basename of the project directory, whereas the project directory is the base directory of the docker-compose file. There are several prominent Docker Compose features that provide the benefits mentioned above. If you are searching for the best server solution for your DevOps team, check out Bare Metal Cloud.īMC is a cloud-native dedicated server that supports IaC tools and simple API, CLI, and SDK interaction. Note: Docker Compose supports the CI/CD pipeline which is an important practice for DevOps. Its features that enable it to cache a configuration and re-use existing containers also contribute to resource efficiency. Running everything on a single piece of hardware lets you save a lot of resources. Docker Compose allows you to host multiple isolated environments on one host. This contributes to setting up and enabling an efficient CI/CD pipeline. By pulling the YAML file and source code, they can launch the environment in a matter of minutes. Since all the services are defined inside the docker-compose file, developers can easily access and share the entire configuration. This adds an extra security layer for the app since the services cannot be accessed externally. Compose creates a network for all the services to share. Thanks to YAML scripts and environment variables, you can easily configure or modify application services. Here are some of the main benefits of using Docker Compose: It allows you to create and start one or multiple containers for each dependency using a single command. The software documents and configures all the application's service dependencies (including databases, caches, web service APIs, etc.). Compose is a fast and simple way of starting projects as it can quickly spin up new isolated development environments. In Docker Compose, containers are designed to run on a single host as they have traditionally been focused on development and testing workflows. Developers can define and configure the environment needed for running automated end-to-end testing using the appropriate Docker Compose file. Compose supports automated testing, which is an essential part of CI/CD as it can easily create and destroy the required testing environment. How to Install Docker Compose on Ubuntu 20.04 Docker Compose Use CasesĬommon use cases of Docker Compose include: For step-by-step instructions, check out: Additionally, you can check the status of a service, display log outputs, and run one-off commands. With the file in place, you can start, stop, or rebuild all the services using a single command. The YAML file configures the application's services and includes rules specifying how you want them to run. Therefore, use Docker Compose to manage the whole software development lifecycle (SDLC).ĭocker Compose works by applying rules defined in a docker-compose.yaml file. It can handle multiple containers simultaneously in the production, staging, development, testing, and CI environment. It can be tedious to start and manage containers manually, so Docker created a useful tool that helps speed up the process - Docker Compose.ĭocker Compose is software used for defining and running multi-container Docker applications. An application can consist of multiple containers running different services.
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