how to use docker with wordpress and nginx - mysql

Question

i try to use docker for use wordpress with https, but that not work,
i have the message :
wordpress | MySQL Connection Error: (2002) Connection refused
version: "3.8"
services:
db:
image: mysql:5.7
volumes:
- db_data:/var/lib/mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: somewordpress
MYSQL_DATABASE: wordpress
MYSQL_USER: wordpress
MYSQL_PASSWORD: wordpress
wordpress:
container_name: wordpress
image: wordpress:php7.4-apache
restart: always
stdin_open: true
tty: true
environment:
WORDPRESS_DB_HOST: db:3306
WORDPRESS_DB_USER: wordpress
WORDPRESS_DB_PASSWORD: wordpress
WORDPRESS_DB_NAME: wordpress
volumes:
- ./wordpress:/var/www/html
nginx:
container_name: nginx
image: nginx:latest
restart: unless-stopped
ports:
- 80:80
- 443:443
volumes:
- ./nginx/conf:/etc/nginx/conf.d

Answer 1

I had the same problem today and after lots of unsuccessful attempts, I think adding expose helped :
db:
image: mysql:5.7
volumes:
- db_data:/var/lib/mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: somewordpress
MYSQL_DATABASE: wordpress
MYSQL_USER: wordpress
MYSQL_PASSWORD: wordpress
expose:
-"3306"
Reference : https://docs.docker.com/compose/compose-file/#expose

Answer 2

firstly, your title is "how to use wp with nginx" but in your docker compose file, you are clearly pulling a wordpress:apache image.
secondly, you can delete the whole content related to nginx since that container runs alone and outside the scope of your wordpress.
now, that you only have wordpress and db as services in your yml file (which is how it should be), you must add a ports directive to wordpress:
ports:
- 80:80
And finally, for the containers to be able to resolve their ips within the same network, you need to add this at the end of your yml file:
volumes:
wordpress:
db:
Now this will ensure you're running a wordpress with a db, and the wordpress image runs apache (which is httpd, not nginx).
Thirdly, if you're not satisfied with httpd and want an nginx container, you'll need to look for a wordpress image on hub.docker.com that runs on nginx.