The official image works well for a simple WordPress installation, however, what happens if you want to deploy WordPress in Docker Swarm and scale it for more than two instances?
This Dockerfile has built-in steroids to handle scalling and includes:
- Uses PHP-FPM 8.0
- Stores PHP sessions in memcached
- Includes composer
autoload.phpasmu-plugin - Adds Docker Healthchecks
- Includes a copy of WP-CLI
- Installs WordPress cron to local crontab
- Enables OpCache and APCu
- Installs S3-Uploads plugins to store media in AWS S3
Does it sound awesome? Give it a try!
Refer to the docker-compose.yml file for a comprehensive example.
The main idea was to scale WordPress using two Docker Swarm nodes. We manage to have it with the following architecture:
- One WordPress instance running in each node
- Memcached running in one node
- A AWS S3 bucket to store media
- One MariaDB Maxscale running in one node
- One master MariaDB running in the first node
- One slave MariaDB running in the second node