Deploying a Redis Standalone Cluster with KubeBlocks

A standalone Redis deployment consists of a single Redis server instance running independently without any replication or clustering. It is the simplest and most lightweight deployment model.

Use Cases

• Development & testing environments.
• Small applications with low traffic.

Prerequisites

Before proceeding, ensure the following:

• Environment Setup:
  • A Kubernetes cluster is up and running.
  • The kubectl CLI tool is configured to communicate with your cluster.
  • KubeBlocks CLI and KubeBlocks Operator are installed. Follow the installation instructions here.
• Namespace Preparation: To keep resources isolated, create a dedicated namespace for this tutorial:

kubectl create ns demo
namespace/demo created

Deploying the Redis Standalone Cluster

apiVersion: apps.kubeblocks.io/v1
kind: Cluster
metadata:
  name: redis-standalone
  namespace: demo
spec:
  terminationPolicy: Delete
  clusterDef: redis    # set to reids
  topology: standalone # set topology to standalone
  componentSpecs:
  - name: redis
    replicas: 1       # set replica to 1
    serviceVersion: 7.2.4
    resources:
      limits:
        cpu: "0.5"
        memory: "0.5Gi"
      requests:
        cpu: "0.5"
        memory: "0.5Gi"
    volumeClaimTemplates:
      - name: data
        spec:
          accessModes:
            - ReadWriteOnce
          resources:
            requests:
              storage: 20Gi

Key Configuration Details:

• clusterDef: redis: Specifies the ClusterDefinition CR for the cluster.
• topology: standalone: Configures the cluster to use standalone topology.
• componentSpecs: Defines the components in the cluster:
  • Component 'redis':
    • serviceVersion: 7.2.4: Specifies the version of the Redis service to be deployed.

Verifying the Deployment

Check the Cluster Status

Once the cluster is deployed, check its status:

kubectl get cluster redis-standalone  -n demo -w

Expected Output:

NAME               CLUSTER-DEFINITION   TERMINATION-POLICY   STATUS    AGE
redis-standalone   redis                Delete               Running   34s

Verify Component Status

kubectl get component redis-standalone-redis -n demo

Expected Output:

NAME                     DEFINITION              SERVICE-VERSION   STATUS    AGE
redis-standalone-redis   redis-7-1.0.0           7.2.4             Running   90s

Cleanup

To remove all resources created during this tutorial:

kubectl delete cluster redis-standalone -n demo
kubectl delete ns demo