WP-CLI with WordPress using Docker

What is this sample?

This repository show how to use WP-CLI to control dependencies between MySQL, WordPress and WP-CLI.

Who should reference this sample?

1. If you need to make single WordPress environment or multiple WordPress environments.
2. If you suffered from dependencies between containers.

Background

When I was on one of the member of security project team to find new zero-day vulnerability from CMS, my job was find a way how to create runtime environments easily. I found a docker and it was a perfect tool to do annoying jobs.

But, I faced to dependence problem among WordPress container, WP-CLI container and MySQL container. I must wait my WP-CLI container's job before to finish to build WordPress container and MySQL container. According to Docker reference, depends_on options in docker-compose.yml won't check prepareaiton of each containers. So, When you use WP-CLI, its command may not works correctly.

depends_on does not wait for db and redis to be “ready” before starting web - only until they have been started. If you need to wait for a service to be ready, see Controlling startup order for more on this problem and strategies for solving it.

So I solved dependency problem using third-party tool dockerize. You can communicate with TCP using dockerize. When each container(db, WordPress) are ready, docker-cli starts its command.