Docker Compose installation and usage steps

1. What is Docker Compose?

1. Docker Compose is a tool for defining and running multi-container applications.
2. Docker Compose defines multi-container Docker applications through yml files;
3. Docker Compose uses a single command to create or manage multiple containers based on the definition of a yml file;
4. Docker Compose is used for multi-container control of Docker and is a tool used to automate Docker. With Docker Compose, you can automate all complex Docker operations with just one command (which can be simply understood as batch processing).

2. Docker Compose installation steps

1. Download the Docker Compose binary file. The version I downloaded here is 1.29.2

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

2. Add executable permissions to the binary file just downloaded

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

3. Check whether the installation is successful through the docker-compose --version command

3. Docker Compose version differences

1. The v3 version does not support attributes such as volume_from, extends, and group_add;
2. The settings of cpu and memory properties are moved to deploy;
3. The v3 version supports Docker Swarm, while the v2 version does not;

Note: The official has introduced a new --compatibility flag in 1.20.0 to help developers easily transition to v3. There are still some issues that the official does not recommend using directly in production. It is recommended that you directly use the v3 version.

4. Docker Compose basic commands

The Docker Compose command is basically the same as Docker, mainly for Docker Compose lifecycle control, log format and other related commands. You can view the help through docker-compose --help.

#Build and start the nginx container docker-compose up -d nginx                     

#Enter the nginx container docker-compose exec nginx bash            

#The container started by the UP command will be stopped and the container will be deleted docker-compose down                             

#Show all containers docker-compose ps                                   

#Restart the nginx container docker-compose restart nginx                   

#Build nginx image docker-compose build nginx      

#Build nginx image without cache docker-compose build --no-cache nginx 

#View nginx logs docker-compose logs nginx                      

#View nginx's real-time logs docker-compose logs -f nginx                   

#Verify (docker-compose.yml) file configuration,
#When the configuration is correct, nothing is output. When the file configuration is wrong, error information is output docker-compose config -q                        

#Output nginx's docker log in json format docker-compose events --json nginx       

#Pause the nginx container docker-compose pause nginx                 

#Restore ningx container docker-compose unpause nginx             

#Delete the nginx container docker-compose rm nginx                       

#Stop the nginx container docker-compose stop nginx                    

#Start the nginx container docker-compose start nginx

5. For use cases, please refer to "Hand-in-hand teaching you to build gitlab community Chinese version with Docker"

This is the end of this article about the installation and use of Docker Compose. For more information about the installation and use of Docker Compose, please search for previous articles on 123WORDPRESS.COM or continue to browse the following related articles. I hope you will support 123WORDPRESS.COM in the future!