roles.tf

data "aws_iam_policy_document" "assume_role" {
  statement {
    effect = "Allow"

    principals {
      type        = "Service"
      identifiers = ["ec2.amazonaws.com"]
    }

    actions = ["sts:AssumeRole"]
  }
}

resource "aws_iam_role" "bastion" {
  name               = "${var.identifier}-bastion-role"
  path               = "/"
  assume_role_policy = data.aws_iam_policy_document.assume_role.json
}

resource "aws_iam_role" "nodes" {
  name               = "${var.identifier}-nodes-role"
  path               = "/"
  assume_role_policy = data.aws_iam_policy_document.assume_role.json
}

resource "aws_iam_role_policy_attachment" "bastion_core" {
  count      = var.ssm ? 1 : 0
  role       = aws_iam_role.bastion.name
  policy_arn = "arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore"
}

resource "aws_iam_role_policy_attachment" "bastion_patch" {
  count      = var.ssm ? 1 : 0
  role       = aws_iam_role.bastion.name
  policy_arn = "arn:aws:iam::aws:policy/AmazonSSMPatchAssociation"
}

resource "aws_iam_role_policy_attachment" "nodes_core" {
  count      = var.ssm ? 1 : 0
  role       = aws_iam_role.nodes.name
  policy_arn = "arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore"
}

resource "aws_iam_role_policy_attachment" "nodes_patch" {
  count      = var.ssm ? 1 : 0
  role       = aws_iam_role.nodes.name
  policy_arn = "arn:aws:iam::aws:policy/AmazonSSMPatchAssociation"
}