如何将托管 IAM 策略和内联/自定义 IAM 策略附加到 IAM 角色？

Question

我想将托管 IAM 策略 ARN（如AmazomS3FullAccess）和内联/自定义 IAM 策略（在 terraform 文件中以 JSON 编写）附加到单个 IAM 角色。

通过使用，aws_iam_role_policy_attachment我只能附加一项保单，如何附加两项保单？

variables.tf
------------

variable "iam_policy_arn" {
  description = "IAM Policy to be attached to role"
  type        = list(string)
  default     = ["arn:aws:iam::aws:policy/AWSLambdaFullAccess", "arn:aws:iam::aws:policy/AmazonSSMFullAccess", "arn:aws:iam::aws:policy/AmazonSageMakerFullAccess"]
}




main.tf
-------


resource "aws_iam_role" "test_role" {
  name = "test_role"

  assume_role_policy = <<-EOF
{
  "Version":"2012-10-17",
  "Statement":[
    {
      "Effect":"Allow",
      "Principal":{
        "Service":"ec2.amazonaws.com"
      },
      "Action":"sts:AssumeRole"
    },
    {
      "Effect":"Allow",
      "Principal":{
        "Service":"sagemaker.amazonaws.com",
        "AWS":"*"
      },
      "Action":"sts:AssumeRole"
    }
  ]
}    
  EOF
}
resource "aws_iam_role_policy_attachment" "role_policy_attachment" {
  role       = "${aws_iam_role.test_role.name}"
  count      = "${length(var.iam_policy_arn)}"
  policy_arn = "${element(var.iam_policy_arn,count.index)}"

}

resource "aws_iam_instance_profile" "test_profile" {
  name = "test_profile"
  role = "${aws_iam_role.test_role.name}"
}

现在我想将如下所示的自定义策略附加到该角色

resource "aws_iam_role_policy" "test_policy" {
  name = "test_policy"
  role = aws_iam_role.test_role.id

  policy = <<-EOF
  {
    "Version": "2012-10-17",
    "Statement": [
      {
        "Action": [
          "ec2:Describe*"
        ],
        "Effect": "Allow",
        "Resource": "*"
      }
    ]
  }
  EOF
}

如何将托管 IAM 策略和自定义 IAM 策略附加到 IAM 角色？

Answer 1

我能够使用以下代码将托管 IAM 策略和内联/自定义 IAM 策略附加到 IAM 角色。

# variables.tf
variable "cloudwatch_lambda_iam_policy_arn" {
  type        = list(string)
  description = "IAM Policy to be attached to AWS CloudWatch Lambda role"
  default     = ["arn:aws:iam::aws:policy/AmazonEC2FullAccess", "arn:aws:iam::aws:policy/AWSLambdaExecute", "arn:aws:iam::aws:policy/AmazonCloudDirectoryFullAccess", "arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"]
}

#------------------------------------------------------------

# lambda.tf
resource "aws_iam_role" "awsmetrics_exec_role" {
  name = "awsmetrics-exec-role"

  assume_role_policy = <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": "sts:AssumeRole",
      "Principal": {
        "Service": "lambda.amazonaws.com"
      },
      "Effect": "Allow",
      "Sid": ""
    }
  ]
}
EOF
}

# custom/inline policy
resource "aws_iam_role_policy" "sts_assumerole_lambda" {
  name = "sts-assumerole-lambda"
  role = aws_iam_role.awsmetrics_exec_role.id

  policy = <<-EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "VisualEditor0",
      "Effect": "Allow",
      "Action": [
        "sts:AssumeRole",
        "sts:DecodeAuthorizationMessage",
        "sts:AssumeRoleWithSAML",
        "sts:AssumeRoleWithWebIdentity"
      ],
      "Resource": "*"
    }
  ]
}
EOF
}

# AWS managed policies
resource "aws_iam_role_policy_attachment" "awsmetrics_role_policy_attachment" {
  role       = aws_iam_role.awsmetrics_exec_role.name
  count      = length(var.cloudwatch_lambda_iam_policy_arn)
  policy_arn = element(var.cloudwatch_lambda_iam_policy_arn, count.index)
}