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This repo contains some examples for building AWS AMIs and VirtualBox templates using Packer

It also contains Terraform code to create secure VPCs in AWS

Packer

Folder structure

The packer code is structured as follows:

  • bootstrap: This folder contains bootstrap scripts for AWS and Virtualbox.
  • provisioners: This folder contains provisioning Powershell scripts, Ansible playbooks, etc.

How to use the templates

VirtualBox

  • Install Virtualbox in your computer
  • Run packer build virtualbox-ubuntu16.json or packer build virtualbox-win2012.json

If you are testing Windows 2012, start with the no-updates version of Autounattend.xml and when you are comfortable with the workflow and want to actually build a fully patched version, swap the autounattend variable to the one including Windows updates. The whole process will take about 2.5h!

AWS AMIs

  • Create a VPC with at least a subnet where you will run the instance to build the AMI
  • Create a Security group allowing ports 22 (SSH for Linux boxes) and 5985-5986 (WinRM for Windows boxes)
resource "aws_security_group" "packer" {
  name        = "packer"
  description = "For packer AMI builds"
  vpc_id      = "${var.vpc_id}"

  tags {
    Name = "packer"
  }

  ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }

  ingress {
    from_port   = 5985
    to_port     = 5986
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }

  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
}
  • Run packer build -var 'aws_access_key=YOUR_KEY' -var 'aws_secret_key=YOUR_SECRET' -var 'subnet_id=subnet-XXXXXX' -var 'security_group_id=sg-YYYYYY' aws-win2012.json or if you have the AWS CLI tool configure with an ~/.aws/credentials file you can omit the aws credentals parameters

Terraform

Folder structure

The Terraform code is divided into 2 folders: Environments and modules

Environments

  • 2 environments: test and prod
  • Different states for both the network setup (less likely to change) and the app setup

Modules

  • 2 modules: vpc-public-private and apache_app
  • The network module consists of: 1 VPC, 3 Public Subnets, 3 Private Subnets, 3 NAT Gateways and a Bastion Server
  • The app module will use the network module outputs to create a small APP with an ELB in the public networks and an autoscaling group of Apache servers in the private networks

How to run setups

In each of the network environment folders:

  • Modify variables.tf as needed
  • terraform init to initialize the s3 remote state and dynamodb lock
  • terraform plan to validate what is going to happen
  • terraform apply

Beware that the nats, ec2 instances and ebs volumens and network traffic are not for free so if you want to tear it down just run:

  • terraform destroy