Wordpress Docker

Run a scalable and a high availability Wordpress website in Docker swarm

Connecting machines

Install Docker on each server.

Run manager node:

docker swarm init --advertise-addr=xxx.xxx.xxx.xxx

Connect worker nodes:

docker swarm join --token <token> xxx.xxx.xxx.xxx:2377

Running

Run stack:

docker stack deploy --compose-file docker-compose.yml wpstack

Re-scale wordpress service:

docker service scale wpstack_wordpress=4

Update wordpress service image:

docker service update wpstack_wordpress

Remove stack:

docker stack rm wpstack

Features

• encrypted overlay network
• wordpress volume mounted to a shared persistance storage array
• database performance configured for a server with 4CPUs and 8GB of RAM

Disclaimer

This configuration is intended to run behind a proxy with SSL and a firewall.

Model

Image is showing the stack running on three Ubuntu demo servers. Database is on the manager node, and two wordpress instances on each worker node.

Help guides:

• https://maddevs.io/blog/deploy-and-scale-wordpress-with-docker-cloud-swarm-mode/
• https://hackernoon.com/architecting-a-highly-available-and-scalable-wordpress-using-docker-swarm-traefik-glusterfs-a69186e9f0e
• https://thenewstack.io/tutorial-create-a-docker-swarm-with-persistent-storage-using-glusterfs/
• https://www.digitalocean.com/community/tutorials/how-to-configure-the-linux-firewall-for-docker-swarm-on-ubuntu-16-04