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Budget with multiple TagKeyValue cost filters #5890

dmrzzz opened this issue Sep 14, 2018 · 1 comment


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commented Sep 14, 2018

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I want to create a Budget with more than one TagKeyValue in cost_filters. AWS supports this, but AFAICT Terraform currently does not.

New or Affected Resource(s)

  • aws_budgets_budget

Potential Terraform Configuration

provider "aws" {
  region = "us-east-2"

resource "aws_budgets_budget" "test" {
  name              = "test"
  budget_type       = "COST"
  limit_amount      = "500"
  limit_unit        = "USD"
  time_unit         = "MONTHLY"
  time_period_start = "2018-01-01_00:00"

  cost_filters {
    TagKeyValue = ["user:Service$IP Address Management", "user:Environment$Dev"]

  cost_types {
    use_amortized = true

Currently (Terraform v0.11.8, v1.36.0) this fails with

Error: aws_budgets_budget.test: cost_filters (TagKeyValue): '' expected type 'string', got unconvertible type '[]interface {}'


Just for fun, let's comment out the TagKeyValue line above and then terraform apply (creating a Budget with no cost_filters). Now I can add my desired filters manually using the AWS web console.

At this point, we can see that AWS CLI returns an array for TagKeyValue (hence my belief that Terraform ought to accept an array for it):

$ aws budgets describe-budget --account-id 378517677616 --budget-name test
    "Budget": {
        "BudgetType": "COST",
        "TimePeriod": {
            "End": 3706473600.0,
            "Start": 1535760000.0
        "CalculatedSpend": {
            "ActualSpend": {
                "Unit": "USD",
                "Amount": "0"
        "CostTypes": {
            "UseBlended": false,
            "IncludeCredit": true,
            "IncludeSubscription": true,
            "IncludeRecurring": true,
            "IncludeUpfront": true,
            "UseAmortized": true,
            "IncludeSupport": true,
            "IncludeDiscount": true,
            "IncludeRefund": true,
            "IncludeTax": true,
            "IncludeOtherSubscription": true
        "BudgetName": "test",
        "BudgetLimit": {
            "Unit": "USD",
            "Amount": "500"
        "TimeUnit": "MONTHLY",
        "CostFilters": {
            "TagKeyValue": [
                "user:Service$IP Address Management",

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commented Apr 23, 2019

I'm interested in working on this issue.

I think other keys of cost_filters include the same problem. For example, Region, LinkedAccount, etc.

I'm going to create a pull request to fix it. However, it may take a while since I'm a beginner of terraform-provider-aws's implementation.

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