codeguru/vpc.tf at feature/ec2 · cloudhesive/codeguru · GitHub

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resource "aws_vpc" "main" {
  cidr_block           = var.vpc_cidr
  enable_dns_hostnames = true
  enable_dns_support   = true

  tags = merge(var.common_tags, {
    Name = "Main VPC"
  })
}

resource "aws_subnet" "private" {
  count             = 2
  vpc_id            = aws_vpc.main.id
  cidr_block        = var.private_subnet_cidrs[count.index]
  availability_zone = var.availability_zones[count.index]

  tags = merge(var.common_tags, {
    Name = "Private Subnet ${count.index + 1}"
  })
}

resource "aws_subnet" "public" {
  count             = 2
  vpc_id            = aws_vpc.main.id
  cidr_block        = var.public_subnet_cidrs[count.index]
  availability_zone = var.availability_zones[count.index]

  tags = merge(var.common_tags, {
    Name = "Public Subnet ${count.index + 1}"
  })
}

resource "aws_internet_gateway" "main" {
  vpc_id = aws_vpc.main.id

  tags = merge(var.common_tags, {
    Name = "Main IGW"
  })
}

resource "aws_nat_gateway" "main" {
  allocation_id = aws_eip.nat.id
  subnet_id     = aws_subnet.public[0].id

  tags = merge(var.common_tags, {
    Name = "Main NAT Gateway"
  })
}

resource "aws_eip" "nat" {
  vpc = true

  tags = merge(var.common_tags, {
    Name = "NAT Gateway EIP"
  })
}

resource "aws_route_table" "private" {
  vpc_id = aws_vpc.main.id

  route {
    cidr_block     = "0.0.0.0/0"
    nat_gateway_id = aws_nat_gateway.main.id
  }

  tags = merge(var.common_tags, {
    Name = "Private Route Table"
  })
}

resource "aws_route_table" "public" {
  vpc_id = aws_vpc.main.id

  route {
    cidr_block = "0.0.0.0/0"
    gateway_id = aws_internet_gateway.main.id
  }

  tags = merge(var.common_tags, {
    Name = "Public Route Table"
  })
}

resource "aws_route_table_association" "private" {
  count          = 2
  subnet_id      = aws_subnet.private[count.index].id
  route_table_id = aws_route_table.private.id
}

resource "aws_route_table_association" "public" {
  count          = 2
  subnet_id      = aws_subnet.public[count.index].id
  route_table_id = aws_route_table.public.id
}