wordpress with php-fpm in docker

000 README.md

This is how to run the wordpress fpm docker image using nginx and mariadb on the host, and with ssmtp to act as the container's MTA. This is the directory layout used:

/etc/wordpress
├── docker-compose.yml
├── image
│   ├── Dockerfile
│   ├── ssmtp.conf
└── secrets
    └── mysql-passwd
/srv/blogs.example.net

See https://medium.com/@kormat/running-wordpress-in-docker-3606fc5a8c4 for more details.

docker-compose.yml

version: '3.1'
services:
    wordpress:
        build: ./image
        container_name: wordpress
        image: wordpress-ssmtp
        restart: always
        network_mode: bridge
        volumes:
            - /etc/wordpress/secrets:/mnt/secrets
            - /srv/blogs.example.net:/var/www/html
            - /var/run/mysqld:/var/run/mysqld
        ports:
            - 127.0.0.1:9000:9000
        environment:
            WORDPRESS_DB_HOST: localhost:/var/run/mysqld/mysqld.sock
            WORDPRESS_DB_NAME: blogs
            WORDPRESS_DB_USER: wordpress
            WORDPRESS_DB_PASSWORD_FILE: /mnt/secrets/mysql-passwd
        cap_drop:
            - ALL
        cap_add:
            - CHOWN
            - FOWNER
            - SETGID
            - SETUID

Dockerfile

FROM wordpress:5.0.0-fpm-alpine

RUN apk add --no-cache ssmtp
COPY ssmtp.conf /etc/ssmtp/ssmtp.conf
RUN echo 'sendmail_path = "/usr/sbin/ssmtp -t -i"' > /usr/local/etc/php/conf.d/mail.ini

nginx.conf

server {
    server_name blogs.example.net;
    root /srv/blogs.example.net;

    index index.php;

    location / {
        try_files $uri $uri/ /index.php?$args;
    }

    # Uncomment after install is finished.
    #rewrite /wp-admin$ $scheme://$host$uri/ permanent;

    location ~ [^/]\.php(/|$) {
        fastcgi_split_path_info ^(.+?\.php)(/.*)$;
        if (!-f $document_root$fastcgi_script_name) {
            return 404;
        }
        # Mitigate https://httpoxy.org/ vulnerabilities
        fastcgi_param HTTP_PROXY "";

        fastcgi_pass 127.0.0.1:9000;
        fastcgi_index index.php;

        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME /var/www/html$fastcgi_script_name;
        fastcgi_param PATH_INFO       $fastcgi_path_info;
        fastcgi_param PATH_TRANSLATED /var/www/html$fastcgi_path_info;
    }
}