VPC with no Landing Zone ¶

What ¶

Do you want to try binbash Leverage but you are not willing to transform yet your already existent infra to the binbash Leverage Landing Zone (honoring the AWS Well Architected Framework)?

With this cookbook you will create a VPC with all the benefits binbash Leverage network layer provides.

If you want to use the Full binbash Leverage Landing Zone please visit the Try Leverage section

This will give you the full power of binbash Leverage and the AWS Well Architected Framework.

Why ¶

Maybe because you found binbash Leverage but you want to try it out first before you convert your base infra.

How ¶

Objective ¶

We will create a simple VPC (with all its resources) and an will add an EC2 instance to it so we can test it for real.

What you need: ¶

an AWS account
a user with programmatic access keys and the keys
binbash Leverage

Common Process ¶

Ok, just install binbash Leverage and create the Leverage project. When creating credentials, do it for MANAGEMENT type. Basically:

mkdir project && cd project
leverage project init
## edit the yaml file
leverage project create
leverage credentials configure --type MANAGEMENT

You end up with this structure:

❯ tree -L 2 .
.
├── build.env
├── config
│   └── common.tfvars
├── management
│   ├── config
│   ├── global
│   └── us-east-1
├── Pipfile
├── Pipfile.lock
├── project.yaml
├── security
│   ├── config
│   └── us-east-1
└── shared
    ├── config
    └── us-east-1

Create a dummy account dir.

Despite we won't create a real account (since there is no Landing Zone), we'll have to create a dir to hold all the layers we need.

mkdir -p apps-dummy/us-east-1/

Copy the config files:

cp -r shared/config apps-dummy/

In config/account.tfvars change this:

## Environment Name
environment = "shared"

to this

## Environment Name
environment = "apps-dummy"

(note the environment is the same as the created dir)

In config/backend.tfvars change this:

profile = "bm-shared-oaar"

to this:

profile = "bm-management"

VPC Process ¶

Copy the network layer:

cp -r shared/us-east-1/base-network apps-dummy/us-east-1/

Go into the layer:

cp -r shared/us-east-1/base-network apps-dummy/us-east-1/
cd apps-dummy/us-east-1/base-network

Since we are testing we won't use the S3 backend (we didn't create the bucket, but you can do it easily with the base-tf-backend layer), so comment this line in config.tf file:

  #backend "s3" {
  #  key = "shared/network/terraform.tfstate"
  #}

Initialize the layer:

leverage tf init --skip-validation

Note the skip-validation flag. This is needed since we are using local tfstate.

Plan it:

leverage tf plan

If you are happy (or you are unhappy but you are ok with the plan), apply it:

leverage tf apply

You should end up with something like this:

Apply complete! Resources: 20 added, 0 changed, 0 destroyed.

Outputs:

availability_zones = [
  "us-east-1a",
  "us-east-1b",
]
nat_gateway_ids = []
private_route_table_ids = [
  "rtb-065deXXXXXXX86b6d",
]
private_subnets = [
  "subnet-0aXXXXXXXXXXd80a6",
  "subnet-0bXXXXXXXXXX0ff67",
]
private_subnets_cidr = [
  "172.18.0.0/21",
]
public_route_table_ids = [
  "rtb-01XXXXXXXXXXXX887",
]
public_subnets = [
  "subnet-0648XXXXXXXXX69",
  "subnet-0297XXXXXXXXf10",
]
public_subnets_cidr = [
  "172.18.8.0/21",
]
vpc_cidr_block = "172.18.0.0/20"
vpc_id = "vpc-0aXXXXXXXXXX06d8f"
vpc_name = "bm-apps-dummy-vpc"

EC2 Process ¶

Great, now we can go for the EC2!

Get the layer ¶

For this step we'll go for a layer that can be found in the binbash Leverage RefArch under this directory.

You can download a directory from a git repository using this Firefox addon or any method you want.

Note when you copy the layer (e.g. with gitzip), the file common-variables.tf , which is a soft link, was probably copied as a regular file. If this happens, delete it:

cd ec2-fleet-ansible\ --
rm common-variables.tf

Prepare the layer ¶

Again, since we are not running the whole binbash Leverage Landing Zone we need to comment out these lines in config.tf:

  #backend "s3" {
  #  key = "apps-devstg/ec2-fleet-ansible/terraform.tfstate"
  #}

Also in this file, comment out these two resources:

data "terraform_remote_state" "security" {
data "terraform_remote_state" "vpc-shared" {

And change vpc to be like this:

data "terraform_remote_state" "vpc" {
  backend = "local"
  config = {
    path = "../base-network/terraform.tfstate"
  }
}

Again, since we are not using the full binbash Leverage capabilities, we are not using the S3 Terraform backend, thus the backend is local.

In ec2_fleet.tf update module version like this:

  source = "github.com/binbashar/terraform-aws-ec2-instance.git?ref=v5.5.0"

Init the layer:

leverage tf init --skip-validation

(same as before with the skip flag)

Now, we need some common and specific vars that are not set.

So, create a variables.tf file with this content:

variable "environment" {
  type        = string
  description = "Environment Name"
}
variable "profile" {
  type        = string
  description = "AWS Profile (required by the backend but also used for other resources)"
}
variable "region" {
  type        = string
  description = "AWS Region"
}
##=============================#
##  EC2 Attributes             #
##=============================#
variable "aws_ami_os_id" {
  type        = string
  description = "AWS AMI Operating System Identificator"
  default     = "ubuntu/images/hvm-ssd/ubuntu-jammy-22.04-amd64-server-*"
}

variable "aws_ami_os_owner" {
  type        = string
  description = "AWS AMI Operating System Owner, eg: 099720109477 for Canonical "
  default     = "099720109477"
}

## security.tf file
##=============================#
##  SSM Attributes             #
##=============================#
variable "instance_profile" {
  type        = string
  description = "Whether or not to create the EC2 profile, use null or 'true'"
  default     = "true"
}

variable "prefix" {
  type        = string
  description = "EC2 profile prefix"
  default     = "fleet-ansible"
}

variable "name" {
  type        = string
  description = "EC2 profile name"
  default     = "ssm-demo"
}

variable "enable_ssm_access" {
  type        = bool
  description = "Whether or not to attach SSM policy to EC2 profile IAM role, use false or true"
  default     = true
}

(set the Ubuntu image as per your needs)

In ec2_fleet.tf file comment these lines:

 # data.terraform_remote_state.vpc-shared.outputs.vpc_cidr_block

 # key_name               = data.terraform_remote_state.security.outputs.aws_key_pair_name

...again, due to the lack of the whole binbash Leverage Landing Zone...

If you plan to access the instance from the Internet (EC2 in a public subnet)(e.g. to use Ansible), you change the first line to "0.0.0.0/0". (or better, a specific public IP)

If you want to add an SSH key (e.g. to use Ansible), you can generate a new SSH key, add a resource like this:

resource "aws_key_pair" "devops" {
  key_name   = "devops-key"
  public_key = "ssh-ed25519 AAAAC3N9999999999999999999999999eF Binbash-AWS-instances"
}

And replace the line in ec2_fleet.tf with this one:

  key_name               = aws_key_pair.devops.key_name

In the same file, change instance_type as per your needs.

Also you can add this * * *to the ec2_ansible_fleet resource:

  create_spot_instance = true

to create spot instances.... and this

  create_iam_instance_profile = true
  iam_role_description        = "IAM role for EC2 instance"
  iam_role_policies = {
    AmazonSSMManagedInstanceCore = "arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore"
  }

to add SSM access.

In locals.tf file check the variable multiple_instances. There the EC2 instances are defined, by default there are four. Remember to set the subnets in which the instances will be created.

Finally, apply the layer:

leverage tf apply

Check your public IP and try to SSH into your new instance!

Have fun!