iam_roles.tf

# EKS Cluster IAM Role
resource "aws_iam_role" "cluster_role" {
  name = "${var.name}-eks-cluster-role"

  assume_role_policy = data.aws_iam_policy_document.cluster_assume_role_policy.json
}

data "aws_iam_policy_document" "cluster_assume_role_policy" {
  statement {
    actions = ["sts:AssumeRole"]
    effect  = "Allow"

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

resource "aws_iam_role_policy_attachment" "cluster_AmazonEKSClusterPolicy" {
  policy_arn = "arn:aws:iam::aws:policy/AmazonEKSClusterPolicy"
  role       = aws_iam_role.cluster_role.name
}

# Node Group IAM Role
resource "aws_iam_role" "node_group_role" {
  name = "${var.name}-eks-node-group-role"

  assume_role_policy = data.aws_iam_policy_document.node_group_assume_role_policy.json
}

data "aws_iam_policy_document" "node_group_assume_role_policy" {
  statement {
    actions = ["sts:AssumeRole"]
    effect  = "Allow"

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

resource "aws_iam_role_policy_attachment" "node_group_AmazonEKSWorkerNodePolicy" {
  policy_arn = "arn:aws:iam::aws:policy/AmazonEKSWorkerNodePolicy"
  role       = aws_iam_role.node_group_role.name
}

resource "aws_iam_role_policy_attachment" "node_group_AmazonEKS_CNI_Policy" {
  policy_arn = "arn:aws:iam::aws:policy/AmazonEKS_CNI_Policy"
  role       = aws_iam_role.node_group_role.name
}

resource "aws_iam_role_policy_attachment" "node_group_AmazonEC2ContainerRegistryReadOnly" {
  policy_arn = "arn:aws:iam::aws:policy/AmazonEC2ContainerRegistryReadOnly"
  role       = aws_iam_role.node_group_role.name
}