Updating an app service with an access restriction rule involving a VNet crashes

[midgleyc]

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Terraform (and AzureRM Provider) Version

Terraform v0.11.14

• provider.azurerm v1.30.1

Affected Resource(s)

• azurerm_app_service

Terraform Configuration Files

Create an app service with an access restriction rule using a VNet, then run any terraform command that updates the app service.

resource "azurerm_app_service" "test" {
  name  = "example-app-service"
  location = "West Europe"
  tags = {
      update = "${timestamp()}"
  }
}

Debug Output

https://gist.github.com/midgleyc/4bc1f27e61a696bc3c5210b28437e9a7

Expected Behavior

Terraform should apply my changes, ignoring the access restrictions.

Actual Behavior

Terraform deletes all app services from the state, then crashes.

Steps to Reproduce

Create an app service with an access restriction rule using a VNet. Import it (this works fine). Create a configuration file that will update the app service, then apply it.

Notes

The ipSecurityRestriction section for VNets looks like

    "ipSecurityRestrictions": [
      {
        "vnetSubnetResourceId": "/subscriptions/<GUID>/resourceGroups/<resourceGroup>/providers/Microsoft.Network/virtualNetworks/<network>/subnets/<subnet>",
        "action": "Allow",
        "tag": "Default",
        "priority": 1,
        "name": "vnet"
      }
    ],

This doesn't have an "ipAddress" key, so it fails the existing "ip_restriction" schema (which parses the IP Access Restriction well enough that Terraform doesn't crash). This currently shows up in the state as

                            "site_config.0.http2_enabled": "true",
                            "site_config.0.ip_restriction.#": "1",
                            "site_config.0.java_container": "",

References

This is like #3685, but while that wants a complete support of App Restrictions, I just want to be able to apply my configuration without removing and re-adding the VNet access restriction. This is also like #2488, but that one is about not breaking existing IP Address restrictions.

[mbfrahry]

Hey @midgleyc, thanks for opening this issue. The crash has been found and fixed with #4184. Feel free to reopen this issue if you continue to experience problems after 1.34.0 goes out

[ghost]

This has been released in version 1.34.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 1.34.0"
}
# ... other configuration ...

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 hashibot-feedback@hashicorp.com. Thanks!