vpc: Adding vpc module

1 files changed, 103 insertions, 0 deletions

diff --git a/astroshop-terraform/modules/vpc/main.tf b/astroshop-terraform/modules/vpc/main.tf
new file mode 100644
index 0000000..3694588
--- /dev/null
+++ b/astroshop-terraform/modules/vpc/main.tf
@@ -0,0 +1,103 @@
+resource "aws_vpc" "main" {
+  cidr_block           = var.vpc_cidr
+  enable_dns_support   = true
+  enable_dns_hostnames = true
+
+  tags = {
+    Name = "${var.cluster_name}-vpc"
+  }
+}
+
+resource "aws_subnet" "private" {
+  count             = length(var.private_subnet_cidrs)
+  vpc_id            = aws_vpc.main.id
+  cidr_block        = var.private_subnet_cidrs[count.index]
+  availability_zone = var.availability_zones[count.index]
+
+  tags = {
+    Name                                        = "${var.cluster_name}-private-${count.index + 1}"
+    "kubernetes.io/cluster/${var.cluster_name}" = "shared"
+    "kubernetes.io/role/internal-elb"           = "1"
+  }
+}
+
+resource "aws_subnet" "public" {
+  count             = length(var.public_subnet_cidrs)
+  vpc_id            = aws_vpc.main.id
+  cidr_block        = var.public_subnet_cidrs[count.index]
+  availability_zone = var.availability_zones[count.index]
+
+  map_public_ip_on_launch = true
+
+  tags = {
+    Name                                        = "${var.cluster_name}-public-${count.index + 1}"
+    "kubernetes.io/cluster/${var.cluster_name}" = "shared"
+    "kubernetes.io/role/elb"                    = "1"
+  }
+}
+
+resource "aws_internet_gateway" "main" {
+  vpc_id = aws_vpc.main.id
+
+  tags = {
+    Name = "${var.cluster_name}-igw"
+  }
+}
+
+resource "aws_eip" "nat" {
+  count  = length(var.public_subnet_cidrs)
+  domain = "vpc"
+
+  tags = {
+    Name = "${var.cluster_name}-nat-${count.index + 1}"
+  }
+}
+
+resource "aws_nat_gateway" "main" {
+  count         = length(var.public_subnet_cidrs)
+  allocation_id = aws_eip.nat[count.index].id
+  subnet_id     = aws_subnet.public[count.index].id
+
+  tags = {
+    Name = "${var.cluster_name}-nat-${count.index + 1}"
+  }
+}
+
+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 = {
+    Name = "${var.cluster_name}-public"
+  }
+}
+
+resource "aws_route_table" "private" {
+  count  = length(var.private_subnet_cidrs)
+  vpc_id = aws_vpc.main.id
+
+  route {
+    cidr_block     = "0.0.0.0/0"
+    nat_gateway_id = aws_nat_gateway.main[count.index].id
+  }
+
+  tags = {
+    Name = "${var.cluster_name}-private-${count.index + 1}"
+  }
+}
+
+resource "aws_route_table_association" "private" {
+  count          = length(var.private_subnet_cidrs)
+  subnet_id      = aws_subnet.private[count.index].id
+  route_table_id = aws_route_table.private[count.index].id
+}
+
+resource "aws_route_table_association" "public" {
+  count          = length(var.public_subnet_cidrs)
+  subnet_id      = aws_subnet.public[count.index].id
+  route_table_id = aws_route_table.public.id
+}
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