```hcl
output "domain" {
  value = "${var.domain}"
}

output "region" {
  value = "${var.region}"
}

output "vpc" {
  value = "${aws_vpc.kubernetes.id}"
}
```

Add a Terraform output for the Kubernetes security group.
user
```hcl
output "domain" {
  value = "${var.domain}"
}

output "kubernetes_security_group_id" {
  value = "${aws_security_group.kubernetes.id}"
}

output "region" {
  value = "${var.region}"
}

output "vpc_id" {
  value = "${aws_vpc.kubernetes.id}"
}
```
assistant