Deploy an Azure VM Scale Set with Load Balancing

In this objective, you'll add a existing Azure subnet as a data source to your Terraform configuration. This subnet will be used for the network interfaces of the VM Scale Set.

1. Log into the Azure CLI using the provided credentials
2. Retrive the name of the provided resource group and virtual network.
3. Create a new Terraform configuration using the azurerm.
4. Set skip_provider_registration to true for the azurerm provider block.
5. Create data sources for the existing resource group and subnet named web.
6. Create the necessary input variables and terraform.tfvars file.
7. Add an output to display the subnet ID.
8. Deploy the configuration and verify the correct output is displayed in the terminal.

In this objective, you will add a public-facing Azure load balancer using the module from the public registry. The load balancer should listen on port 80 for traffic and send it to the application port defined for the VM Scale Set. The health probe should sent an HTTP request to the "/" path on the application port defined for the VM Scale Set.

1. Add the load balancer module to your configuration using the existing resource group provided by the lab, with the following values:
   • type = "public"
   • pip_sku = "Standard"
   • allocation_method = "Static"
   • lb_sku = "Standard"
2. Add an lb_port entry listening on port 80 and sending traffic to the defined application port.
3. Add an lb_probe entry the checks the path "/" on the defined application port.
4. Validate and deploy the configuration.

In this objective, you will add an Azure VM Scale Set and network security group to the configuration using the provided subnet and startup script. The network security group should allow traffic from anywhere on the defined application port.

1. Add an azurerm_network_security_group and azurerm_network_security_rule to the configuration. The rule should allow TCP traffic from any source address and port to the defined application port of the VM Scale Set.
2. Add a TLS private key for the VM Scale Set configuration.
3. Add a custom_data.tpl file with the linked contents from the course repository.
4. Add an azurerm_linux_virtual_machine_scale_set resource to your configuration using the following values:
   • publisher = "Canonical"
   • offer = "0001-com-ubuntu-server-jammy"
   • sku = "22_04-lts"
   • version = "latest"
5. Include a reference to the network security group and load balancer backend pool in the network_interface block.
6. Include the health_probe_id argument referring to the health probe created by the load balancer module.
7. Add the necessary input variables to the variables.tf file and add the values to the terraform.tfvars file.
8. Add an output for the public IP address of the load balancer.
9. Validate and deploy the configuration.
10. Verify that you can reach the website at the public IP address and port.