如何在 Kubernetes 上部署 Redis 集群

Redis Deployment on Kubernetes Overview

Redis is a versatile open-source platform with a range of use cases including running as a primary database, serving as a message broker, or caching website content. Running Redis on Kubernetes enhances its capabilities by simplifying deployment and improving reliability and performance.

Prerequisites for Deploying Redis on Kubernetes

Before deploying Redis on Kubernetes, the following conditions must be met:

• A Kubernetes cluster compatible with any modern Kubernetes distribution.
• Helm, the package manager for Kubernetes, must be installed to install Redis. Installation options can be found in the Helm documentation if it is not already installed on your system.
• Basic familiarity with Kubernetes is required, although in-depth expertise is not necessary. Knowledge of kubectl and Helm is important.

Deployment Steps

Step 1: Install Redis Helm

To install Redis, use the Redis Helm chart by running the command helm install my-release oci://registry-1.docker.io/bitnamicharts/redis-cluster.

Step 2: Verify Redis Pod Status

After installing the Helm chart, verify that the Redis Pods are running with the command kubectl get pods --all-namespaces. Initially, the Pods will be in the ContainerCreating status but should transition to Running within a few minutes.

Step 3: Export Cluster Password

Export the cluster password as an environment variable using the command export REDIS_PASSWORD=$(kubectl get secret --namespace "default" my-release-redis-cluster -o jsonpath="{.data.redis-password}" | base64 -d) to connect to the newly installed Redis cluster.

Step 4: Start a Redis Client Container

Launch a new container to host the Redis client with the command kubectl run --namespace default my-release-redis-cluster-client --rm --tty -i --restart='Never' --env REDIS_PASSWORD=$REDIS_PASSWORD --image docker.io/bitnami/redis-cluster:7.2.4-debian-12-r11 -- bash.

Step 5: Connect to the Cluster

Once in the client container, connect to the cluster using redis-cli -c -h my-release-redis-cluster -a $REDIS_PASSWORD. At the command prompt, you can interact with the Redis cluster, and running the command CLUSTER INFO should output the current state and statistics of the cluster.

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