Moodle migration architecture and templates

A Moodle migration to Azure includes the following tasks:

  1. Deploy Azure infrastructure with Azure Resource Manager (ARM) templates.
  2. Download and install AzCopy.
  3. Copy the Moodle backup archive to the controller virtual machine instance in the Azure Resource Manager deployment.
  4. Migrate the Moodle application and configuration.
  5. Set up the Moodle controller instance and worker nodes.
  6. Configure PHP and the web server.

This article describes Moodle Azure infrastructure options, and how to deploy Azure resources by using an ARM template that offers your choice of Azure functionality.

Azure infrastructure

The following diagram shows an overview of Azure Moodle infrastructure resources:

Diagram showing Azure infrastructure resources.

ARM template options

To deploy Moodle resources on Azure, you can use a fully configurable ARM template or one of several predefined ARM templates. A fully configurable deployment gives you the most flexibility and deployment choices. You can find the fully configurable template and the predefined templates at the Moodle GitHub repository.

A predefined deployment template uses one of four predefined Moodle sizes: minimal, short-to-mid, large, or maximal.

  • Minimal deployment requires only two virtual machines (VMs), so it works with an Azure free trial subscription. This deployment uses network file system (NFS), MySQL, and a smaller autoscale web front-end VM SKU with one vCore. This template has a fast deployment time of under 30 minutes.

    Button that launches the minimal Moodle deployment ARM template.

  • Small-to-mid deployment supports up to 1,000 concurrent users. This deployment uses NFS, without high availability, and MySQL on eight vCores. This deployment doesn't include options like Elasticsearch or Azure Cache for Redis.

    Button that launches the small-to-mid Moodle deployment ARM template.

  • Large, high-availability deployment supports more than 2,000 concurrent users. This deployment uses Azure Files, MySQL with 16 vCores, and Azure Cache for Redis without other options like Elasticsearch.

    Button that launches the large, high-availability Moodle deployment ARM template.

  • Maximal deployment uses Azure Files, MySQL with the highest SKU, Azure Cache for Redis, Elasticsearch on three VMs, and large storage sizes for both data disks and databases.

    Button that launches the maximal Moodle deployment ARM template.

Deploy the template

To deploy one of the predefined ARM templates:

  1. In the preceding section, select the Deploy to Azure button for the deployment you want. This action takes you to the Azure portal.

  2. On the Custom deployment page in the Azure portal, complete the mandatory Subscription, Resource group, Region, and SSH Public Key fields. For information on how to add the SSH key, see Generating a new SSH key and adding it to the ssh-agent.

    Screenshot showing the Azure Custom deployment screen for a Moodle deployment ARM template.

  3. Select Review + create.

Edit the template

The predefined ARM templates deploy the following default software versions:

  • Ubuntu: 18.04 LTS
  • PHP: 7.4
  • Moodle: 3.8

If your on-premises PHP and Moodle versions differ from the preceding values, update the template versions to match by following these steps:

  1. In the Azure portal, on the ARM template Custom deployment page, select Edit template.

  2. In the resources section of the template, under parameters, add parameters for your Moodle and PHP versions.

    "phpVersion":       { "value": "7.2" },
    "moodleVersion":    { "value": "MOODLE_38_STABLE"}
    

    For example, for Moodle 3.9, the moodleVersion value should be MOODLE_39_STABLE.

    Screenshot showing the Edit template page for a Moodle deployment ARM template.

  3. Select Save.

Next steps

Continue to Moodle migration resources for information about the resources that the ARM template deploys to Azure.