`azurerm_role_management_policy` has constant drift

[paul-hugill]

Is there an existing issue for this?

• [X] I have searched the existing issues

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Terraform Version

1.5.7

AzureRM Provider Version

3.108.1

Affected Resource(s)/Data Source(s)

azurerm_role_management_policy

Terraform Configuration Files

resource "azurerm_role_management_policy" "owner" {
  scope              = local.subscription_path
  role_definition_id = data.azurerm_role_definition.owner.id

  active_assignment_rules {
    expiration_required                = true
    expire_after                       = "P30D"
    require_justification              = true
    require_multifactor_authentication = true
    require_ticket_info                = false
  }

  eligible_assignment_rules {
    expiration_required = false
    expire_after        = null
  }

  activation_rules {
    maximum_duration                   = "PT12H"
    require_multifactor_authentication = true
    require_justification              = true
    require_ticket_info                = false
  }

  notification_rules {
    active_assignments {
      admin_notifications {
        additional_recipients = []
        default_recipients    = true
        notification_level    = "All"
      }
      assignee_notifications {
        additional_recipients = []
        default_recipients    = false
        notification_level    = "Critical"
      }
    }
    eligible_assignments {
      admin_notifications {
        additional_recipients = []
        default_recipients    = false
        notification_level    = "Critical"
      }
      assignee_notifications {
        additional_recipients = []
        default_recipients    = false
        notification_level    = "Critical"
      }
    }
    eligible_activations {
      admin_notifications {
        additional_recipients = []
        default_recipients    = false
        notification_level    = "Critical"
      }
      assignee_notifications {
        additional_recipients = []
        default_recipients    = false
        notification_level    = "Critical"
      }
    }
  }
}

Debug Output/Panic Output

Can provide if required.

Expected Behaviour

On subsequent runs there should be no changes

Actual Behaviour

Always shows changes but not what is being changed:

module.this.azurerm_role_management_policy.owner
   id : "/subscriptions/xxxxxxxxx/providers/Microsoft.Authorization/roleDefinitions/8e3af657-a8ff-443c-a75c-2fe8c4bcb635|/subscriptions/xxxxxxxxx"
   name : "6f3c8f32-3c2d-4917-a5bb-c04ee74bbb09"

   ... 3 unchanged attributes hidden
   ... 4 unchanged blocks hidden

Steps to Reproduce

1. terraform apply
2. Run terraform apply again and see it showing it will do an update but not what it is updating

Important Factoids

No response

References

This appears to be the same as the issue I am having on the azuread_group_role_management_policy resource in the AzureAD provider: https://github.com/hashicorp/terraform-provider-azuread/issues/1398

I believe this is based on the same code.

[magodo]

@paul-hugill From the azuread provider's issue, the diff indicates a change for the approval_stage. Is that the same for your case (as the plan diff you provided doesn't look like something printed directly from TF)?

[paul-hugill]

Sorry @magodo, yes exactly the same, that was a TFC UI output, this is a similar CLI version.

  # module.this.azurerm_role_management_policy.built_in["Owner"] will be updated in-place
  ~ resource "azurerm_role_management_policy" "built_in" {
        id = "/subscriptions/xxxxxxxxxx/providers/Microsoft.Authorization/roleDefinitions/8e3af657-a8ff-443c-a75c-2fe8c4bcb635|/subscriptions/xxxxxxxxxxxxx"
        name= "6f3c8f32-3c2d-4917-a5bb-c04ee74bbb09"
        # (2 unchanged attributes hidden)

      ~ activation_rules {
            # (5 unchanged attributes hidden)

          - approval_stage {
            }
        }

        # (3 unchanged blocks hidden)
    }

In the CLI for both, they show the approval_stage being removed but in the Structured UI output in TFC, there are no changes at all shown.

For anyone else trying to use this, that doesn't need the approvals, then adding ignore_changes at least stops the constant drift.

  lifecycle {
    ignore_changes = [activation_rules[0].approval_stage]
  }

Not a solution but at least makes this usable for me for now.

[magodo]

The issue probably lies in https://github.com/hashicorp/terraform-provider-azurerm/blob/9d1768c6a074a460cd059efc4285f6a7832aa14a/internal/services/authorization/role_management_policy.go#L268-L272

This happens at Create/Update that no approval_stage is specified, it ended up with an empty block, while actually it wants a null.

Ping @manicminer.