Terraform - Elastic IP 생성 및 NAT Gateway 구성

resource "aws_eip" "lb" {
  instance = aws_instance.web.id
  vpc      = true
}

resource "aws_nat_gateway" "example" {
  allocation_id = aws_eip.example.id
  subnet_id     = aws_subnet.example.id

  tags = {
    Name = "gw NAT"
  }

# EIP 받아오기
resource "aws_eip" "nat-2a" {
  vpc      = true
}

resource "aws_eip" "nat-2c" {
  vpc      = true
}

resource "aws_nat_gateway" "natgw-2a" {
  allocation_id = aws_eip.nat-2a.id
  subnet_id     = aws_subnet.sub-pub1-10-10-1-0.id

  tags = {
    Name = "gw NAT-2a"
  }
}
  resource "aws_nat_gateway" "natgw-2c" {
  allocation_id = aws_eip.nat-2c.id
  subnet_id     = aws_subnet.sub-pub2-10-10-2-0.id

  tags = {
    Name = "gw NAT-2c"
  }
}

- EIP를 생성한 뒤 NAT-gateway에는 EIP가 필요하기 떄문에 NAT gateway 생성 시 EIP를 넣어주는 구문이다.