Cannot clear projects from google_billing_budget

[juliocc]

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Terraform Version

Terraform v0.14.10

• provider registry.terraform.io/hashicorp/google v3.63.0

Affected Resource(s)

• google_billing_budget

Terraform Configuration Files

resource "google_billing_budget" "budget" {
  billing_account = var.billing_account
  display_name    = "my budget"
  amount {
    last_period_amount = true
  }
  threshold_rules {
    threshold_percent = 1.0
  }
  budget_filter {
    projects = [
      var.project_number_1,
      var.project_number_2
    ]
  }
}

Debug Output

N/A

Panic Output

N/A

Expected Behavior

Removing the budget_filter block from an existing budget should clear the projects from the underlying resource.

Actual Behavior

Projects are not removed and budget remains the same.

Steps to Reproduce

1. Provide values to billing_account, project_number_1 and project_number_2
2. terraform apply the code shown above
3. Remove the billing_filter block
4. terraform apply again

Important Factoids

Adding other projects or removing some projects works correctly. The problem is updating an existing budget by removing the budget_filter block or setting projects to null or []

References

N/A

[venkykuberan]

@juliocc can you please attach the debug log of your update call , after removing the budget_filter.

[juliocc]

Here it is: https://gist.github.com/juliocc/2497d050fce0277ee7321eb8cdf01b92

[venkykuberan]

Looks like UpdateMask need to include this field in the update call., @melinath

[melinath]

@juliocc the fix to this bug will still require you to set projects = [] and apply prior to deleting the block altogether. This is due to implementation details about terraform core (and the fact that the budget filter block is considered Optional + Computed).

[ghost]

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