how to setup docker compose with example

Posted by : vijayk on Feb 19, 2023

Category : k8s

Docker compose install

Intallation of docker-compose can be done via binary download. Follow these commands-
```python wget https://github.com/docker/compose/releases/download/v2.13.0/docker-compose-linux-x86_64

sudo mv docker-compose-linux-x86_64 /usr/local/bin/docker-compose sudo chmod +x /usr/local/bin/docker-compose

- You can validate the installation by running bellow command    
```python
docker-compose version

Sample docker-compose yaml file-

services:
db:
  # We use a mariadb image which supports both amd64 & arm64 architecture
  image: mariadb:10.6.4-focal
  # If you really want to use MySQL, uncomment the following line
  #image: mysql:8.0.27
  command: '--default-authentication-plugin=mysql_native_password'
  volumes:
    - db_data:/var/lib/mysql
  restart: always
  environment:
    - MYSQL_ROOT_PASSWORD=somewordpress
    - MYSQL_DATABASE=wordpress
    - MYSQL_USER=wordpress
    - MYSQL_PASSWORD=wordpress
  expose:
    - 3306
    - 33060
wordpress:
  image: wordpress:latest
  ports:
    - 80:80
  restart: always
  environment:
    - WORDPRESS_DB_HOST=db
    - WORDPRESS_DB_USER=wordpress
    - WORDPRESS_DB_PASSWORD=wordpress
    - WORDPRESS_DB_NAME=wordpress
volumes:
db_data:

To run the stack -
```
docker-compose up -d 
```
to start , stop & restart the stack-

docker-compose stop

docker-compose start

docker-compose restart

To remove the stack
```
docker-compose down
```
To prune the volumes
```
docker volume prune
```
Example Mysql with Adminer

version: '3.7'
services:
  mysql_db_container:
    image: mysql:latest
    command: --default-authentication-plugin=mysql_native_password
    environment:
      MYSQL_ROOT_PASSWORD: rootpassword
    ports:
      - 3306:3306
    volumes:
      - mysql_db_data_container:/var/lib/mysql
  adminer_container:
    image: adminer:latest
    environment:
      ADMINER_DEFAULT_SERVER: mysql_db_container
    ports:
      - 8080:8080

volumes:
  mysql_db_data_container: