terraform-lab/aws_fargate/iam.tf

resource "aws_iam_role" "api_exec_role" {
  name               = "${var.project}-exec-role"
  assume_role_policy = data.aws_iam_policy_document.api_exec_assume_role.json
}

data "aws_iam_policy_document" "api_exec_assume_role" {
  statement {
    actions = ["sts:AssumeRole"]
    principals {
      type        = "Service"
      identifiers = ["ecs-task.amazonaws.com"]
    }
  }
}

resource "aws_iam_role_policy_attachment" "ecs_exec_iam_attach_assume_role" {
  role       = aws_iam_role.api_exec_role.name
  policy_arn = data.aws_iam_policy_document.api_exec_assume_role
}

data "aws_iam_policy_document" "ecs_exec_role" {
  statement {
    effect = "Allow"
    actions = [
      "ecr:GetAuthorizationToken",
      "ecr:BatchCheckLayerAvailability",
      "ecr:GetDownloadUrlForLayer",
      "ecr:BatchGetImage",
      "logs:CreateLogStream",
      "logs:PutLogEvents"
    ]
    resources = ["*${var.project}*"]
  }
}

resource "aws_iam_role_policy_attachment" "ecs_exec_iam_attach_rules" {
  role       = aws_iam_role.api_exec_role.name
  policy_arn = data.aws_iam_policy_document.ecs_exec_role.json
}