EKS Istio Rate Limit with Redis

This repository provides a comprehensive setup to implement global rate limiting in an EKS (Elastic Kubernetes Service) environment using Istio and Redis.

Overview

The repository contains configurations and scripts to set up an EKS cluster, deploy Istio, and implement global rate limiting using both local and remote Redis instances.

Features

• EKS Setup: Terraform scripts to provision an EKS cluster.
• Istio Integration: Configuration files to deploy Istio using helm.
• Rate Limiting: Implement rate limiting using Istio and Redis. Both local and remote (AWS ElastiCache) rate limiting configurations are provided.
• Redis: Configuration to deploy Redis locally within the EKS cluster and also to configure a remote Redis instance using AWS ElastiCache.
• Sample Application: Deployment of a sample httpbin application to demonstrate the rate limiting functionality.

Directory Structure

• kubernetes/: Contains Kubernetes configuration files for deploying Istio, Redis, rate limit configurations, and the sample httpbin application.
• terraform/: Contains Terraform scripts for provisioning the EKS cluster, VPC, and other related AWS resources.
• output/: Contains Kubeconfig and Terraform output artifacts.

Quick Start

The makefile provided takes you through all necessary steps and is self documenting.

$ make

help                           This help
terraform-up                   Bring up aws infra with terraform
terraform-down                 Bring down aws infra with terraform
refresh-k8s-token              Refresh eks kubectl kubeconfig token
istio-install                  Install istio with helm
deploy-redis-cli               Deploy redis-cli
deploy-ratelimit-local         Deploy local connected ratelimit service
undeploy-ratelimit-local       Undeploy local connected ratelimit service
deploy-ratelimit-remote        Deploy remote connected ratelimit service
undeploy-ratelimit-remote      Undeploy remote connected ratelimit service
deploy-httpbin                 Deploy test application httpbin
clean                          Clean up the environment

Provision EKS Cluster:

Navigate to the terraform/ directory and run the Terraform scripts to provision the EKS cluster and related resources.

make terraform-up

Deploy Istio:

Once the EKS cluster is up, deploy Istio using the provided configuration files.

make istio-install

Deploy Redis CLI:

Deploy a redis-cli pod for debugging purposes.

make deploy-redis-cli

Configure Rate Limiting:

Apply the rate limit configurations based on your choice of local or remote Redis.

make deploy-ratelimit-local
make deploy-ratelimit-remote

Deploy Sample Application:

Deploy the httpbin application and test the rate limiting functionality.

make deploy-httpbin

Cleanup:

To delete all the resources run:

make clean

This will destroy the terraform infra and remove output artifacts.

Conclusion

This repository provides a seamless way to integrate rate limiting in an EKS environment using Istio and Redis. It offers flexibility in choosing between global rate limiting with local and remote redis and provides a sample application to demonstrate the functionality.