nicc777 / poc-redis-cluster-in-k8s

A small experimental setup to test Redis cluster in Kubernetes

poc-redis-cluster-in-k8s

A small experimental setup to test Redis cluster in Kubernetes, initially .

Tested on a local running Ubuntu 22.04 system using this script to deploy a small 4x node K3s Kubernetes cluster.

Warning This is NOT intended for production deployments, but merely as a stepping stone to understand the deployment and usage of a Redis cluster in Kubernetes. Certain items are known not to be secure, for example the way the passwords are set in the Redis configuration ConfigMap.

Lab Notes

Round 1

	Notes
Objective	Run the Redis HA Cluster in Kubernetes
Initial setup	based on the guide from Bharathiraja Shanmugam

Deployment:

Command:

kubectl apply -f kubernetes/redis-lab01.yaml

Findings:

Command 1:

kubectl get all -n poc

Output 1:

NAME          READY   STATUS    RESTARTS   AGE
pod/redis-0   1/1     Running   0          85m
pod/redis-1   1/1     Running   0          84m
pod/redis-2   1/1     Running   0          84m
pod/redis-3   1/1     Running   0          84m
pod/redis-4   1/1     Running   0          83m

NAME            TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)    AGE
service/redis   ClusterIP   None         <none>        6379/TCP   85m

NAME                     READY   AGE
statefulset.apps/redis   5/5     85m

The cluster was UP, but this is only ONE master with a couple of slaves.

After some more reading and thinking about it, I decided to try a multi-master approach with sentinel.

Additional reading:

• ( 💰 paywall) Setup Persistence Redis Cluster in Kubernetes
• ( 📅 old/outdated ) Reliable, Scalable Redis on Kubernetes
• Bitnami package for Redis(R) Cluster

The latter item in the reading list seems to be the next logic step in the experiment.

Cleanup:

kubectl delete -f kubernetes/redis-lab01.yaml