【实战】K8S Helm部署Redis Cluster Redisinsight

news2024/12/26 23:15:19

文章目录

- 前言
- 部署Redis Cluster
- 安装Redis Insight
- 写在最后

前言

在Web服务的开发过程中，Redis一直以来都有着举足轻重的作用。基本上所有的后端服务都会用这个中间件实现具体的业务场景，比如常作为系统缓存、分布式锁，也可以实现排名、定位以及发布订阅队列等等。当然，在k8s平台我们也能够部署Redis集群，今天就以Helm快速部署Redis集群。

部署Redis Cluster

一般情况下我们优先采用哨兵模式、cluster模式，这样才能保障高可用。今天作为演示，我们就采用普通的伪集群进行安装测试，当然其他的集群模式也是有helm charts的。

#添加 bitnami仓库
[root@master k8s]#  helm repo add bitnami https://charts.bitnami.com/bitnami

# 查看仓库列表
[root@master k8s]# helm repo list
NAME            URL
bitnami         https://charts.bitnami.com/bitnami
ingress-nginx   https://kubernetes.github.io/ingress-nginx

#拉取安装包
[root@master k8s]# helm pull bitnami/redis-cluster --version 8.6.6
#解压缩
[root@master k8s]# tar -zxvf redis-cluster-8.6.6.tgz 
#进入解压后的目录
[root@master k8s]# cd redis-cluster

#修改value.yaml
[root@master redis-cluster]#  vim value.yaml

# 主要编辑values.yaml如下内容
#储存配置
global.storageClass: "nfs-storage"
#密码
global.redis.password: "123456"

#创建命名空间
[root@master redis-cluster]# kubectl create ns  redis-cluster
#安装redis-master
[root@master redis-cluster]# helm install redis-cluster .  -n  redis-cluster

验证redis集群

[root@master redis-cluster]# kubectl get pods,svc -n redis-cluster | grep redis

pod/redis-cluster-0 1/1 Running 1 (78s ago) 2m21s
pod/redis-cluster-1 1/1 Running 1 (78s ago) 2m21s
pod/redis-cluster-2 1/1 Running 1 (78s ago) 2m21s
pod/redis-cluster-3 1/1 Running 1 (78s ago) 2m21s
pod/redis-cluster-4 1/1 Running 1 (78s ago) 2m21s
pod/redis-cluster-5 1/1 Running 1 (78s ago) 2m21s
service/redis-cluster ClusterIP 10.97.55.190 6379/TCP 2m21s
service/redis-cluster-headless ClusterIP None 6379/TCP,16379/TCP 2m21s

#进入节点1
[root@node2 ~]# kubectl exec -it redis-cluster-0 -n redis-cluster bash
I have no name!@redis-cluster-0:/$ redis-cli -c  -h 10.97.55.190 -p 6379

10.97.55.190:6379> auth 123456
OK
10.97.55.190:6379> set name senfel
OK
10.97.55.190:6379> get name
“senfel”
10.97.55.190:6379> set age 10
-> Redirected to slot [741] located at 10.244.2.53:6379
OK
10.244.2.53:6379> get age
“10”

卸载Redis Cluster

#查看helm
[root@master redis-cluster]# helm list -n redis-cluster

NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION
redis-cluster redis-cluster 1 2023-08-29 15:26:02.082652495 +0800 CST deployed redis-cluster-8.6.6 7.0.11

#卸载安装
[root@master redis-cluster]# helm uninsatll redis-cluster

安装Redis Insight

RedisInsight 是一个直观且高效的 Redis GUI，允许您与数据库交互并管理数据 - 内置对 Redis 模块的支持。

创建k8s执行文件redis-insight.yaml

cat >>redis-insight.yaml <<EOF
apiVersion: apps/v1
kind: Deployment
metadata: 
  name: redis-insight
  namespace: redis-cluster
spec:
  replicas: 1
  selector: 
    matchLabels:
      app: redis-insight
  template: 
    metadata: 
      labels: 
        app: redis-insight
    spec:
      containers:
      - name: redis-insight
        image: redislabs/redisinsight:1.12.1
        imagePullPolicy: IfNotPresent
        ports: 
        - containerPort: 8001
        volumeMounts: 
        - name: db
          mountPath:  /db
      volumes:
      - name: db
        emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
  name: redis-insight-service
  namespace: redis-cluster
spec:
  type: NodePort
  ports:
  - port: 80
    targetPort: 8001
    nodePort: 31888
  selector:
    app: redis-insight
EOF

#创建redisinsight
[root@master k8s]# kubectl apply -f redis-insight.yaml
deployment.apps/redis-insight created
service/redis-insight-service created

#获取服务
[root@master k8s]# kubectl get svc -n redis-cluster

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
redis-cluster ClusterIP 10.97.55.190 6379/TCP 45m
redis-cluster-headless ClusterIP None 6379/TCP,16379/TCP 45m
redis-insight-service NodePort 10.102.211.215 80:31888/TCP 21s

#移除服务
[root@master k8s]# kubctl delete -f redis-insight.yaml

浏览器登录
k8s-node-ip:31888
在这里插入图片描述

查看服务名称

[root@node1 ~]# kubectl get svc -n redis-cluster

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
redis-cluster ClusterIP 10.97.55.190 6379/TCP 53m
redis-cluster-headless ClusterIP None 6379/TCP,16379/TCP 53m
redis-insight-service NodePort 10.102.211.215 80:31888/TCP 7m53s

访问格式是：
host: redis-cluster-headless.redis-cluster.svc.cluster.local svc名称. ns.svc.cluster.local
port: 6379
name: redis-cluster-headless svc名称
在这里插入图片描述