Common Environment Infrastructure

Table of content

• Common Environment Infrastructure
  • Table of content
  • Getting Started
  • Usage
  • Outputs
  • Cleanup

This folder contains the Terraform code to deploy the common environment infrastructure for our EKS Cluster Blue and Green. The AWS resources created by the script are:

• Networking
  • VPC
    • 3 public subnets, 1 per AZ. If a region has less than 3 AZs it will create same number of public subnets as AZs.
    • 3 private subnets, 1 per AZ. If a region has less than 3 AZs it will create same number of private subnets as AZs.
    • 1 NAT Gateway
    • 1 Internet Gateway
    • Associated Route Tables
• 1 Hosted zone to use for our clusters with name ${environment}.${hosted_zone_name}
• 1 wildcard certificate for TLS termination associated to our new HostedZone *.${environment}.${hosted_zone_name}
• 1 SecretManager password used to access ArgoCD UI in both EKS clusters.

Getting Started

Make sure you have all the prerequisites for your laptop.

Fork this repository and create the GitHub token granting access to this new repository in your account. Store this secret in AWS secrets manager using the aws cli. -->

Usage

cd environment/

• Run Terraform init to download the providers and install the modules

terraform init

Note: We share

• Review the terraform plan output, take a look at the changes that terraform will execute, and then apply them:

terraform plan

terraform apply --auto-approve

There can be somme Warnings due to not declare variables. This is normal and you can ignore them as we share the same terraform.tfvars for the 3 projects by using symlinks for a uniq file, and we declare some variables used for the eks-blue and eks-green directory

Outputs

After the execution of the Terraform code you will get an output with needed IDs and values needed as input for the next Terraform applies.

terraform output

Example:

aws_acm_certificate_status = "ISSUED"
aws_route53_zone = "eks-blueprint.eks.example.org"
vpc_id = "vpc-0d649baf641a8071e"

We are going to use this common environment infrastructure to host the EKS Blue and Green clusters.

Cleanup

Run the following command if you want to delete all the resources created before.

If you have created EKS blueprints clusters, you'll need to clean those resources first.

terraform destroy