hunfabric/blueprints/gke/patterns/kafka/README.md

Highly Available Kafka on GKE

• Introduction
• Requirements
• Cluster authentication
• Kafka Configuration
• Sample Configuration
• Variables

Introduction

This blueprints shows how to a hihgly available Kakfa instance on GKE using the Strimzi operator.

Requirements

This blueprint assumes the GKE cluster already exists. We recommend using the accompanying Autopilot Cluster Pattern to deploy a cluster according to Google's best practices. Once you have the cluster up-and-running, you can use this blueprint to deploy Kafka in it.

The Kafka manifests will download , which means that the subnet where the GKE cluster is deployed needs to have Internet connectivity to download the images. If you're using the provided Autopilot Cluster Pattern, you can set the enable_cloud_nat option of the vpc_create variable.

Cluster authentication

Once you have a cluster with Internet connectivity, create a terraform.tfvars and setup the credentials_config variable. We recommend using Anthos Fleet to simplify accessing the control plane.

Kafka Configuration

This template exposes several variables to configure the Kafka instance:

• namespace which controls the namespace used to deploy the Kafka instance
• kafka_config to customize the configuration of the Kafka instance. The default configuration deploys version 3.6.0 with 3 replicas, with a disk of 10Gi and 4096 MB of RAM.
• zookeeper_config to customize the configuration of the Zookeeper instance. The default configuration deploys 3 replicas, with a disk of 10Gi and 2048 MB of RAM.

Any other configuration can be applied by directly modifying the YAML manifests under the manifest-templates directory.

Sample Configuration

The following template as a starting point for your terraform.tfvars

credentials_config = {
  kubeconfig = {
    path = "~/.kube/config"
  }
}
kafka_config = {
  volume_claim_size = "15Gi"
  replicas          = 4
}

zookeeper_config = {
  volume_claim_size = "15Gi"
}

Variables

name	description	type	required	default
credentials_config	Configure how Terraform authenticates to the cluster.	object({…})	✓
kafka_config	Configure Kafka cluster statefulset parameters.	object({…})		{}
namespace	Namespace used for Redis cluster resources.	string		"kafka"
templates_path	Path where manifest templates will be read from. Set to null to use the default manifests.	string		null
zookeeper_config	Configure Zookeper cluster statefulset parameters.	object({…})		{}