k8s-training-app/02_wordpress

Wordpress lab

Spawn a standalone Wordpress instance

• Create a Namespace.
• Deploy the wordpress:5 image, using a deployment of one replica and exposing the port 80.
• Try to connect to it using port forwarding from the hosting node.
• Confirm the Wordpress setup screen is available and that you need a database to complete the setup.

Create a service to expose Wordpress

• Expose the Wordpress server, with a service to facilite access to it.

Create a MariaDB database

• Deploy the mariadb:10 image:
  • Using a deployment of one replica
  • Exposing an environment variable called MYSQL_ROOT_PASSWORD containing the password of your choice
  • Exposing an environment variable called MYSQL_DATABASE with the value wordpress (to automatically create an empty database at MariaDB startup)
  • Exposing the port 3306.
• Create a service to expose the MariaDB server.
• Resume the Wordpress setup to use the newly created database.
• Delete the mariadb container to have it recreated.
• Go back to Wordpress and note that all previous work is now lost.

Store MySQL credentials in a secret

• Create a secret containing mysql user (root) and the corresponding password.
• Update the mariadb deployment to use this secret for the root password.

Put Wordpress database settings into environment variables

• Edit the wordpress deployment and add the following environment variables with appropriate values:
  • WORDPRESS_DB_HOST
  • WORDPRESS_DB_NAME
  • WORDPRESS_DB_USER from the secret previously created
  • WORDPRESS_DB_PASSWORD from the secret previously created
• Confirm the database settings are now automatically configured at first wordpress start

Persist the MariaDB volume

• Create a PersistentVolumeClaim to store MariaDB data.
• Modify the mariadb deployment to mount the new PersistentVolume into /var/lib/mysql
• Repeat the Wordpress setup
• Delete the mariadb container and confirm the Wordpress configuration is restored from the database.