terraform/examples/azure-wordpress-mysql-replication

Deploys a WordPress web site backed by MySQL master-slave replication

This Terraform template was based on this Azure Quickstart Template. Changes to the ARM template that may have occurred since the creation of this example may not be reflected here.

This template deploys a WordPress site in Azure backed by MySQL replication with one master and one slave server. It has the following capabilities:

• Installs and configures GTID based MySQL replication on CentOS 6
• Deploys a load balancer in front of the 2 MySQL VMs
• MySQL, SSH, and MySQL probe ports are exposed through the load balancer using Network Security Group rules.
• WordPress accesses MySQL through the load balancer.
• Configures an http based health probe for each MySQL instance that can be used to monitor MySQL health.
• WordPress deployment starts immediately after MySQL deployment finishes.
• Details about MySQL management, including failover, can be found here.

If you would like to leverage an existing VNET, then please see the documentation here to learn about importing existing resources into Terraform and bringing them under state management by this template. To import your existing VNET, you may use this command.

terraform import azurerm_virtual_network.testNetwork /subscriptions/<YOUR-SUB-ID-HERE>/resourceGroups/<existing-resource-group-name>/providers/Microsoft.Network/virtualNetworks/<existing-vnet-name>

main.tf

The main.tf file contains the resources necessary for the MySql replication deployment that will be created. It also contains the Azure Resource Group definition and any defined variables.

website.tf

The website.tf contains an azurerm_template_deployment that will deploy the Wordpress website.

outputs.tf

This data is outputted when terraform apply is called, and can be queried using the terraform output command.

provider.tf

You may leave the provider block in the main.tf, as it is in this template, or you can create a file called provider.tf and add it to your .gitignore file.

Azure requires that an application is added to Azure Active Directory to generate the client_id, client_secret, and tenant_id needed by Terraform (subscription_id can be recovered from your Azure account details). Please go here for full instructions on how to create this to populate your provider.tf file.

terraform.tfvars

If a terraform.tfvars or any .auto.tfvars files are present in the current directory, Terraform automatically loads them to populate variables. We don't recommend saving usernames and password to version control, but you can create a local secret variables file and use the -var-file flag or the .auto.tfvars extension to load it.

If you are committing this template to source control, please insure that you add this file to your .gitignore file.

variables.tf

The variables.tf file contains all of the input parameters that the user can specify when deploying this Terraform template.