what is docker compose

docker compose is a command line tool for defining and running multi-container Docker applications; through Compose, developers can use YML files to configure all services required by the application.

The operating environment of this tutorial: linux5.9.8 system, docker-1.13.1 version, Dell G3 computer.

Introduction to docker Compose

Compose is a tool for defining and running multi-container Docker applications. With Compose, you can use YML files to configure all the services your application requires. Then, using a single command, you can create and start all services from the YML file configuration.

Three steps to use Compose:

• Use a Dockerfile to define the application's environment.

• Use docker-compose.yml to define the services that make up your application so they can run together in an isolated environment.

• Finally, execute the docker-compose up command to get the entire application up and running.

Compose installation

On Linux, we can download its binary package from Github for use. The latest released version address: https:/ /github.com/docker/compose/releases.

Run the following command to download the current stable version of Docker Compose:

$ sudo curl -L "https://github.com/docker/compose/releases/download/v2.2.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

To install a different version of Compose, replace 1.24.1.

Apply executable permissions to the binary:

$ sudo chmod +x /usr/local/bin/docker-compose

Create a soft link:

$ sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose

Test whether the installation is successful:

$ docker-compose --version
cker-compose version 1.24.1, build 4667896b

Note: For alpine, The following dependency packages are required: py-pip, python-dev, libffi-dev, openssl-dev, gcc, libc-dev, and make.

Recommended learning: "docker video tutorial"

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