Update existing app service with Terraform

问题

in my Azure account a have some resources. Resource groups, app services, storage accounts... I've created these resources by using the Azure portal or Powershell. Then i've written a terraform script to add other resources and update some of the existing ones. In particular i'm interested in updating the app service. I want to add some settings and a managed identity to it. What happens is that terraform says: "look, there is already an app service with the name you specified". I tried to use "terraform import" to bind the existing app service to my terrafom state file, but doing so i loose the settings that i've put in the terraform file.

How can i solve this problem? Thank you.

回答1:

terraform import is the way to go. If you have any existing settings in your file: Just remove them until you have fully imported the app service.

Full tutorial - with a resource group instead of an app service, but the principle is the same: https://azurecitadel.com/automation/terraform/lab6/#lab-importing-resources

Create a resource group:

Grab the ID for the azure resource: id=$(az group show --name deleteme --query id --output tsv)

Create an empty stanza for the resource in a new import.tf file

resource "azurerm_resource_group" "deleteme" {}

Run the import command:

terraform import azurerm_resource_group.deleteme $id
terraform-labs$ terraform import azurerm_resource_group.deleteme $id
Acquiring state lock. This may take a few moments...
azurerm_resource_group.deleteme: Importing from ID "/subscriptions/2d31be49-d999-4415-bb65-8aec2c90ba62/resourceGroups/deleteme"...
azurerm_resource_group.deleteme: Import complete!
  Imported azurerm_resource_group (ID: /subscriptions/2d31be49-d999-4415-bb65-8aec2c90ba62/resourceGroups/deleteme)
azurerm_resource_group.deleteme: Refreshing state... (ID: /subscriptions/2d31be49-d999-4415-bb65-8aec2c90ba62/resourceGroups/deleteme)

Import successful!

The resources that were imported are shown above. These resources are now in
your Terraform state and will henceforth be managed by Terraform.

Run terraform plan and you should see some errors as our block is not populated
Run terraform state show azurerm_resource_group.deleteme

id       = /subscriptions/2d31be49-d999-4415-bb65-8aec2c90ba62/resourceGroups/deleteme
location = westeurope
name     = deleteme
tags.%   = 0

Add in the name argument, and the location using the loc variable
Rerun terraform plan and it should show no errors and no planned changes
The resource is now fully imported and safely under the control of Terraform.

来源：https://stackoverflow.com/questions/58039351/update-existing-app-service-with-terraform

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terraform