Why does Terraform require either nat instance id or instance id or internet gateway id?

Question

Amazon Web Services

Good time of the day!
Question about aws and Terraform. When I create a private subnet, I try to add a default route to it for the entire VPC, like this:
from
main.tf file
resource "aws_subnet" "Private_Subnet3" {
vpc_id = "${aws_vpc.Main_VPC.id}"
cidr_block = "${ var.private_subnet3_cidr}"
availability_zone = "${var.Availability_Zone_B}"
tags {
Name = "Private Subnet 3"
}
}
resource "aws_route_table" "private-rt" {
vpc_id = "${aws_vpc.Main_VPC.id}"
route {
cidr_block = "${var.Main_VPC.cidr_block}"
}
tags {
Name = "
resource "aws_route_table_association" "private-rt" {
subnet_id = "${aws_subnet.Private_Subnet3.id}"
route_table_id = "${aws_route_table.private-rt.id}"
}
I get a runtime error where it says nat instance id or instance id must be defined
.

Answer 1

I'm not good at terraforming and you didn't provide information about resources - vpc, subnet, rt .... But I have a wild suspicion that you either have a subnet not in a vpc, or in general everything is in different regions or something else with a location . Nat / ig are needed when you need to bring traffic out of the vpc and back

Answer 2

Vadim
https://www.terraform.io/docs/providers/aws/r/rout...
Please note that the route block has two arguments, and you have one. In general, you need to not only specify which CIDR to route, but also what to route it through