redis-cluster部署

最近面试被问到redis集群内容 因此整理下相关部署内容。文章以图为主，看着一点都不费劲，看完都不需要找翻其他文档。你就放心整吧，一整一个不吱声

环境准备

随便一台电脑, 安装一下docker

集群部署

1. 执行脚本命令，生成redis.conf 配置文件

for port in $(seq 6380 6385); 
do 
mkdir -p /Users/candice/DevOps/docker/redis-cluster/node-${port}/conf
touch /Users/candice/DevOps/docker/redis-cluster/node-${port}/conf/redis.conf
cat  << EOF > /Users/candice/DevOps/docker/redis-cluster/node-${port}/conf/redis.conf
port ${port}
requirepass 1234
masterauth 1234
bind 0.0.0.0
protected-mode no
daemonize no
appendonly yes
cluster-enabled yes 
cluster-config-file nodes.conf
cluster-node-timeout 5000
cluster-announce-ip 10.10.10.139
cluster-announce-port ${port}
cluster-announce-bus-port 1${port}
EOF
done

效果展示

image.png

2. 编写redis-cluster.yml 准备启动redis

version: '3.7'
services:
   node-redis-1:
     image: redis:latest
     container_name: node-redis-1
     ports:
       - "6380:6380"
       - "16380:16380"
     volumes:
       # 目录记得修改， 别照搬照抄啊
       # 第一步生成的redis.conf 挂载到容器内
       - ./node-6380/conf/redis.conf:/etc/redis/redis.conf 
       #  data数据挂载，rdb aof数据文件映射到宿主机
       - /Users/yangjing/DevOps/data-volume/node-redis-1:/data      
     command: redis-server /etc/redis/redis.conf 
     privileged: true
   node-redis-2:
     image: redis:latest
     container_name: node-redis-2
     ports:
       - "6381:6381"
       - "16381:16381"
     volumes:
       - ./node-6381/conf/redis.conf:/etc/redis/redis.conf 
       - /Users/yangjing/DevOps/data-volume/node-redis-2:/data       
     command: redis-server /etc/redis/redis.conf 
     privileged: true
   node-redis-3:
     image: redis:latest
     container_name: node-redis-3
     ports:
       - "6382:6382"
       - "16382:16382"
     volumes:
       - ./node-6382/conf/redis.conf:/etc/redis/redis.conf 
       - /Users/yangjing/DevOps/data-volume/node-redis-3:/data 
     command: redis-server /etc/redis/redis.conf 
     privileged: true
   node-redis-4:
     image: redis:latest
     container_name: node-redis-4
     ports:
       - "6383:6383"
       - "16383:16383"
     volumes:
       - ./node-6383/conf/redis.conf:/etc/redis/redis.conf 
       - /Users/yangjing/DevOps/data-volume/node-redis-4:/data   
     command: redis-server /etc/redis/redis.conf 
     privileged: true
   node-redis-5:
     image: redis:latest
     container_name: node-redis-5
     ports:
       - "6384:6384"
       - "16384:16384"
     volumes:
       - ./node-6384/conf/redis.conf:/etc/redis/redis.conf 
       - /Users/yangjing/DevOps/data-volume/node-redis-5:/data 
     command: redis-server /etc/redis/redis.conf 
     privileged: true
   node-redis-6:
     image: redis:latest
     container_name: node-redis-6
     ports:
       - "6385:6385"
       - "16385:16385"
     volumes:
       - ./node-6385/conf/redis.conf:/etc/redis/redis.conf 
       - /Users/yangjing/DevOps/data-volume/node-redis-6:/data 
     command: redis-server /etc/redis/redis.conf 
     privileged: true

效果展示

image.png

3. 随便找一个节点 进到docker内部 进行配置

// 密码 端口地址记得按自己配置的改
redis-cli  -a 1234 --cluster create 10.10.10.139:6380 10.10.10.139:6381 10.10.10.139:6382 10.10.10.139:6383 10.10.10.139:6384 10.10.10.139:6385   --cluster-replicas 1

image.png

4. 初始集群已配置完，看看效果

image.png

5. 写写数据 试一下

image.png

集群扩容

现在是三主三从，如果想再加一主一从 怎么搞

1. 再搞两个redis.conf 步骤跟之前一样， 记得改port，我是加了个6386、6387
2. 部署下新的两个节点

version: '3.7'
services:
   node-redis-7:
     image: redis:latest
     container_name: node-redis-7
     ports:
       - "6386:6386"
       - "16386:16386"
     volumes:
       - ./node-6386/conf/redis.conf:/etc/redis/redis.conf 
       - /Users/yangjing/DevOps/data-volume/node-redis-7:/data      
     command: redis-server /etc/redis/redis.conf 
     privileged: true
   node-redis-8:
     image: redis:latest
     container_name: node-redis-8
     ports:
       - "6387:6387"
       - "16387:16387"
     volumes:
       - ./node-6387/conf/redis.conf:/etc/redis/redis.conf 
       - /Users/yangjing/DevOps/data-volume/node-redis-8:/data       
     command: redis-server /etc/redis/redis.conf 
     privileged: true

3. 先挂新的master节点

   
   image.png

4. 重新分配master 哈希数据槽

image.png

5. 看看效果

   
   image.png

6. 把6387从节点挂上去

image.png

集群缩容

先删从节点 再处理master

image.png image.png

结尾

文章写的挺累的，有哪里不明确或者有问题 随时留言哦， 我们共同探讨 共同学习～