Kubernetes Infrastructure Setup

🛈 Overview

This repo contains the source code for provisioning and configuration Kubernetes infrastructure using Terraform and Ansible. The setup involves deploying a K8s cluster on AWS EC2 instances with load balancing and configuration management.

🧰 Components

1. Terraform:

   • Used for provisioning the AWS infrastructure.
   • Creates EC2 instances for Kubernetes master and worker nodes.
   • Set up the AWS Load Balancer for internal traffic balancing between master nodes.
   • Instantiates a virtual machine (remote host) with Ansible for configuring the K8s cluster.

2. Ansible:

   • Used for configuring Kubernetes cluster.
   • Deploys and configure kubeadm on the EC2 instances.
   • Manages the setup of Kubernetes master and worker nodes.

🌟 Kubernetes Infrastructure

• Master nodes:

  • 3 EC2 instances.
  • Load balanced internally by an AWS Load Balancer.
  • Handles cluster management and control plane operations.

• Worker nodes:

  • 3 EC2 instances.
  • Receives external traffics and runs application workloads.

• Remote host:

  • A virtual machine created and configured by Terraform.
  • Ensure that the .kube configuration is properly set up for accessing and managing the cluster.

🚀 Getting Started

Prerequisites

• AWS Account: Ensure you have an AWS account with the necessary permissions.
• AWS CLI: After installing AWS CLI, you need to configure authentication with AWS by providing aws_access_key_id & aws_secret_access_key.
  → You can follow this to create your own access key.
• Terraform: Make sure you installed Terraform to use the terraform command.

Setup

1. Clone the repository:

git clone https://github.com/NT114-O21-DACN-DevOps/class-management-terraform-ansible

2. Directory structure:

• terraform/: Contains Terraform configuration files.
• terraform/ansible: Contains Ansible playbook.
• tarraform/templates: Contains a template file (inventory) which will automatically fill the instances information for Ansible configuration.

3. Configure Terraform

• You should modify the Terraform configuration files to suit your AWS environment and requirements.
• Initialize and apply Terraform configuration:

cd terraform
terraform init
terraform apply

This will:

• Provision EC2 instances for Kubernetes.
• Set up the AWS load balancer.
• Instantiate a remote host.
• Automatically run Ansible playbook to configure the K8s cluster as a part of the provisioning process.

Notes

• Ensure your AWS security groups and network configurations are set up to allow communication between instances as required.
• Review the Terraform and Ansible documentation for detailed instructions on configuration and usage.