private_subnet.tf

resource "aws_subnet" "private_subnet_1a" {
  vpc_id     = aws_vpc.cluster_vpc.id
  cidr_block = "10.0.48.0/20"

  availability_zone = format("%sa", var.aws_region)

  tags = {
    Name                                        = format("%s-private-1a", var.cluster_name),
    "kubernetes.io/cluster/${var.cluster_name}" = "shared",
    "karpenter.sh/discovery"                    = var.cluster_name
  }
}

resource "aws_subnet" "private_subnet_1b" {
  vpc_id     = aws_vpc.cluster_vpc.id
  cidr_block = "10.0.64.0/20"

  availability_zone = format("%sb", var.aws_region)

  tags = {
    Name                                        = format("%s-private-1b", var.cluster_name),
    "kubernetes.io/cluster/${var.cluster_name}" = "shared",
    "karpenter.sh/discovery"                    = var.cluster_name
  }
}

resource "aws_subnet" "private_subnet_1c" {
  vpc_id     = aws_vpc.cluster_vpc.id
  cidr_block = "10.0.80.0/20"

  availability_zone = format("%sc", var.aws_region)

  tags = {
    Name                                        = format("%s-private-1c", var.cluster_name),
    "kubernetes.io/cluster/${var.cluster_name}" = "shared",
    "karpenter.sh/discovery"                    = var.cluster_name
  }
}

resource "aws_route_table_association" "private1a" {
  subnet_id      = aws_subnet.private_subnet_1a.id
  route_table_id = aws_route_table.nat.id
}

resource "aws_route_table_association" "private1b" {
  subnet_id      = aws_subnet.private_subnet_1b.id
  route_table_id = aws_route_table.nat.id
}

resource "aws_route_table_association" "private1c" {
  subnet_id      = aws_subnet.private_subnet_1c.id
  route_table_id = aws_route_table.nat.id
}