Deploy WordPress HA Environment

This Terraform module automates the deployment of a high-availability WordPress environment consisting of four nodes: three for WordPress instances and one as a Load Balancer.

The three WordPress nodes are isolated in an internal network, communicating with each other and the Load Balancer. The Load Balancer acts as a proxy, routing external traffic to the three WordPress nodes.

Ansible Configuration

The Ansible script plays a crucial role in setting up the environment:

• Load Balancer: Installs Squid and Caddy on the Load Balancer node.
• WordPress Nodes: Deploys Galera and WordPress as Docker containers, each with a mount point in the /opt folder. These WordPress instances use the local IP as the database connection IP.

Terraform Module Configuration

The Terraform module includes four variables, with three of them having default values:

hcloud_token (Required)

You must provide the Hetzner Cloud token, either via an environment variable or by passing it during the Terraform execution.

server_type (Default: cx21)

Specify the server type to deploy. The default is set to cx21.

image (Default: ubuntu-22.04)

Choose the image to deploy. The default image is ubuntu-22.04.

datacenter (Default: nbg1-dc3)

Select the data center for deployment. The default data center is nbg1-dc3.

Installation Instructions

To proceed with the installation, ensure that both Ansible and Terraform are installed on your system. Additionally, export your Hetzner Cloud token using the following command:

export TF_VAR_hcloud_token=<YOUR TOKEN>

Next, navigate to this project's folder and execute the following Terraform commands:

terraform init
terraform plan
terraform apply

Once the Terraform deployment completes, you can proceed with the Ansible script. During execution, Ansible will prompt you for the vault password:

cd ansible
ansible-galaxy install -r roles/requirements.yml --force
ansible-playbook -i inventory/ site.yaml --ask-vault-pass

After all steps are successfully executed, you can access the newly deployed WordPress installation at https://wordpress-mb.senecops.com/.