Polkadot Node

Overview

This Terraform module simplifies the deployment of AWS EC2 instances and the configuration of Ansible, allowing you to automate infrastructure provisioning effortlessly.

Features

AWS EC2 Instance Creation: Easily create AWS EC2 instances to suit your workload requirements.
Ansible Configuration: Configure Ansible on EC2 instances for efficient automation.
Customization: Customize instance counts, types, and security groups to meet your infrastructure needs.
Ansible Playbooks: Specify source and destination paths for Ansible playbooks.

Usage

To use this Terraform module, include it in your Terraform configuration and specify the required variables. Here's an example:

module "ec2_instances" {
  source              = "./ec2_instance"
  instance_count      = 2
  instance_type       = "m4.2xlarge"
  instance_name       = "polkadot-node"
  security_group_name = "Allow access to instance"
  key_name            = "private_key"
  ami_id              = "ami-04e601abe3e1a910f" # Ubuntu
  private_key_path    = "/tmp/private_key.pem"
  ansible_src_path    = "ansible"
  ansible_dst_path    = "/home/ubuntu/ansible"
}

How to run?

The easiest way is to use the Makefile commands:

# Create the resources
make apply_auto

# Destroy the resources
make destroy_auto

Outputs

private_key_content: The content of the private key.
public_ip_addresses: The public IP addresses of the EC2 instances.

References

TODOs

Automatic Updates
- Generate the dynamic inventory with Terraform to allow Ansible access to the instances
- Keep the private keys, and use them from Ansible
- Update the ansible/vars.yaml the polkadot.version variable to the latest version.
- Run the Ansible command to update the binary to all the instances defined in the inventory.
Update the user who runs the binary (non-root)
Split the file system in different EBS (volumes), to have inmutable infrastructure.

Jose Ramon Mañes

jrmanes/polkadot_node