redis-operator

README

A Golang based redis operator that will make/oversee Redis standalone and cluster mode setup on top of the Kubernetes. It can create a redis cluster setup with best practices on Cloud as well as the Bare metal environment. Also, it provides an in-built monitoring capability using redis-exporter.

For documentation, please refer to https://ot-container-kit.github.io/redis-operator/

Architecture

Purpose

The purpose of creating this operator was to provide an easy and production grade setup of Redis on Kubernetes. It doesn't care if you have a plain on-prem Kubernetes or cloud-based.

Supported Features

Here the features which are supported by this operator:-

• Redis cluster and standalone mode setup
• Redis cluster failover and recovery
• Inbuilt monitoring with prometheus exporter
• Dynamic storage provisioning with pvc template
• Resources restrictions with k8s requests and limits
• Password/Password-less setup
• Node selector and affinity
• Priority class to manage setup priority
• SecurityContext to manipulate kernel parameters

Getting Started

If you want to deploy redis-operator from scratch to a local Minikube cluster, begin with the Getting started document. It will guide your through the setup step-by-step.

Example

The configuration of Redis setup should be described in Redis CRD. You will find all the examples manifests in example folder.

Prerequisites

Redis operator requires a Kubernetes cluster of version >=1.8.0. If you have just started with Operators, its highly recommended to use latest version of Kubernetes.

Quickstart

The setup can be done by using helm. If you want to see more example, please go through the example folder.

But you can simply use the helm chart for installation.

# Add the helm chart
$ helm repo add ot-helm https://ot-container-kit.github.io/helm-charts/

# Deploy the redis-operator
$ helm upgrade redis-operator ot-helm/redis-operator --install --namespace redis-operator

After deployment, verify the installation of operator

$ helm test redis-operator --namespace redis-operator

Creating redis cluster or standalone setup.

# Create redis cluster setup
$ helm upgrade redis-cluster ot-helm/redis-cluster \
  --set redisCluster.clusterSize=3 --install \ 
  --namespace redis-operator

# Create redis standalone setup
$ helm upgrade redis ot-helm/redis \
  --install --namespace redis-operator

If you want to customize the value file by yourself while initializing the helm command, the values files for reference are present here

Monitoring with Prometheus

To monitor redis performance we will be using prometheus. In any case, extra prometheus configuration will not be required because we will be using the Prometheus service discover pattern. For that we already have set these annotations:-

  annotations:
    redis.opstreelabs.in: "true"
    prometheus.io/scrape: "true"
    prometheus.io/port: "9121"

Development

Please see our DEVELOPMENT.md for details.

Release History

Please see our CHANGELOG.md for details.

Documentation

Please see our GETTING_STARTED.md for details.