How to Use Docker Hub Images with Azure terraform Web App

This Docker, Azure, and Terraform article will show how to use Terraform to deploy an Azure Web App for Containers using a Docker Hub image.

Azure Web Apps for Containers allow us to deploy applications already packaged into a Docker image directory to an Azure Web App.

The deployment works by specifying a container registry in the configuration where the image can be downloaded from. The image can be hosted on a private or a public container registry.

In the case of Docker Hub and this article, we will show how to use a public image that doesn’t; require authentication.

Code

The following code creates a Linux service plan and a Web Application. The part that requires attention is the Application_Stack and App_Settings.

To change the Docker image, change the docker_image_name value.

the App_Settings is needed and cannot be removed.

resource "azurerm_service_plan" "appservice" {
  name                = "Linux"
  resource_group_name = azurerm_resource_group.rg.name
  location            = azurerm_resource_group.rg.location
  os_type             = "Linux"
  sku_name            = "P1v2"
}

resource "azurerm_linux_web_app" "webapp" {
  name                = "WebApp"
  resource_group_name = azurerm_resource_group.rg.name
  location            = azurerm_resource_group.rg.location
  service_plan_id     = azurerm_service_plan.appservice.id
 

site_config {
    always_on      = "true"

    application_stack {
      docker_image_name     = "nginx:latest"
      docker_registry_url = "https://index.docker.io/"
      
    }
} 
   app_settings = {
      "DOCKER_ENABLE_CI" = "true"
}

}