eks_iam_roles.tf

# Cluster Level EKS Role
resource "aws_iam_role" "eks_role" {
  name = "eks-role"

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

# Attach Servie Policy
resource "aws_iam_role_policy_attachment" "eks_service_policy" {
  role       = aws_iam_role.eks_role.name
  policy_arn = "arn:aws:iam::aws:policy/AmazonEKSServicePolicy"
}

# Attach Cluster Policy
resource "aws_iam_role_policy_attachment" "eks_cluster_policy" {
  role       = aws_iam_role.eks_role.name
  policy_arn = "arn:aws:iam::aws:policy/AmazonEKSClusterPolicy"
}

# Node Level EKS Role
resource "aws_iam_role" "eks_node_group_role" {
  name = "eks-node-group-role"

  assume_role_policy = <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": "sts:AssumeRole",
      "Principal": {
        "Service": "ec2.amazonaws.com"
      },
      "Effect": "Allow",
      "Sid": "eksRole"
    }
  ]
}
EOF
}

# Attach AmazonEKSWorkerNode Policy
resource "aws_iam_role_policy_attachment" "eks_node_group_AmazonEKSWorkerNodePolicy" {
  policy_arn = "arn:aws:iam::aws:policy/AmazonEKSWorkerNodePolicy"
  role       = aws_iam_role.eks_node_group_role.name
}

# Attach AmazonEKS CNI Policy 
resource "aws_iam_role_policy_attachment" "eks_node_group_AmazonEKS_CNI_Policy" {
  policy_arn = "arn:aws:iam::aws:policy/AmazonEKS_CNI_Policy"
  role       = aws_iam_role.eks_node_group_role.name
}

# Attach AmazonEC2 Container Registry ReadOnly Policy
resource "aws_iam_role_policy_attachment" "eks_node_group_AmazonEC2ContainerRegistryReadOnly" {
  policy_arn = "arn:aws:iam::aws:policy/AmazonEC2ContainerRegistryReadOnly"
  role       = aws_iam_role.eks_node_group_role.name
}