feat: Add SourceArn condition to Fargate profile trust policy (#3039)

feat: add `SourceArn` condition to fargate-profile assume_role_policy

Author: cpboyd

modules/fargate-profile/README.md

@@ -52,6 +52,7 @@ No modules.
 | [aws_caller_identity.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/caller_identity) | data source |
 | [aws_iam_policy_document.assume_role_policy](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |
 | [aws_partition.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/partition) | data source |
+| [aws_region.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/region) | data source |
 
 ## Inputs
 

modules/fargate-profile/main.tf

@@ -1,5 +1,6 @@
 data "aws_partition" "current" {}
 data "aws_caller_identity" "current" {}
+data "aws_region" "current" {}
 
 locals {
   create_iam_role = var.create && var.create_iam_role
@@ -30,6 +31,15 @@ data "aws_iam_policy_document" "assume_role_policy" {
       type        = "Service"
       identifiers = ["eks-fargate-pods.amazonaws.com"]
     }
+
+    condition {
+      test     = "ArnLike"
+      variable = "aws:SourceArn"
+
+      values = [
+        "arn:${data.aws_partition.current.partition}:eks:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:fargateprofile/${var.cluster_name}/*",
+      ]
+    }
   }
 }