first commit

2026-08-09 19:52:19 -04:00
commit f12fb4d7a1
25 changed files with 597 additions and 0 deletions
@@ -0,0 +1,88 @@
+data "aws_availability_zones" "available" {
+  state = "available"
+}
+
+locals {
+  availability_zone = coalesce(var.availability_zone, data.aws_availability_zones.available.names[0])
+}
+
+resource "aws_vpc" "cluster" {
+  cidr_block           = "10.42.0.0/16"
+  enable_dns_hostnames = true
+  enable_dns_support   = true
+
+  tags = { Name = "k8s-security-baseline" }
+}
+
+resource "aws_subnet" "cluster" {
+  vpc_id            = aws_vpc.cluster.id
+  cidr_block        = "10.42.1.0/24"
+  availability_zone = local.availability_zone
+
+  tags = { Name = "k8s-security-baseline" }
+}
+
+resource "aws_internet_gateway" "cluster" {
+  vpc_id = aws_vpc.cluster.id
+}
+
+resource "aws_route_table" "cluster" {
+  vpc_id = aws_vpc.cluster.id
+
+  route {
+    cidr_block = "0.0.0.0/0"
+    gateway_id = aws_internet_gateway.cluster.id
+  }
+}
+
+resource "aws_route_table_association" "cluster" {
+  subnet_id      = aws_subnet.cluster.id
+  route_table_id = aws_route_table.cluster.id
+}
+
+resource "aws_security_group" "cluster" {
+  name        = "k8s-security-baseline"
+  description = "Minimal access for the optional single-node K3s lab host"
+  vpc_id      = aws_vpc.cluster.id
+
+  ingress {
+    description = "SSH from the administrator CIDR"
+    from_port   = 22
+    to_port     = 22
+    protocol    = "tcp"
+    cidr_blocks = [var.admin_cidr]
+  }
+
+  ingress {
+    description = "Kubernetes API from the administrator CIDR"
+    from_port   = 6443
+    to_port     = 6443
+    protocol    = "tcp"
+    cidr_blocks = [var.admin_cidr]
+  }
+
+  egress {
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+}
+
+resource "aws_instance" "k3s" {
+  ami                         = var.ami_id
+  instance_type               = var.instance_type
+  subnet_id                   = aws_subnet.cluster.id
+  vpc_security_group_ids      = [aws_security_group.cluster.id]
+  key_name                    = var.ssh_key_name
+  associate_public_ip_address = true
+
+  root_block_device {
+    volume_size = 30
+    volume_type = "gp3"
+    encrypted   = true
+  }
+
+  tags = { Name = "k8s-security-baseline" }
+}
+