Redis主从复制(基于 CentOS 7.9)

1. 单机 redis 安装

1. 下载源码包

​ https://download.redis.io/releases/redis-6.2.6.tar.gz

2. 解压缩

   tar -zxvf redis-6.2.6.tar.gz
   

3. 安装依赖

   yum install gcc-c++ -y
   

4. 编译安装

   cd redis-6.2.6/
   make && make install
   

5. 创建 redis 专属目录

   mkdir -p /usr/local/redis/working
   

6. 拷贝 redis.conf 至 redis 专属目录

   cp redis.conf /usr/local/redis/6379.conf
   

7. 修改相关配置

   vim 6379.conf
   
   daemonzie yes
   dir /usr/local/redis/working
   bind 0.0.0.0
   # 如需设置密码
   requirepass xxxx
   

8. 拷贝启动脚本并修改相关代码

   cp redis_init_script /etc/init.d/
   vim /etc/init.d/redis_init_script
   # 修改配置文件路径
   CONF="/usr/local/redis/${REDISPORT}.conf"
   # 自启配置
   #chkconfig: 22345 10 90
   #description: Start and Stop redis
   

9. 设置自启

   chkconfig redis_init_script on
   

10. 启动 redis 并检查

    ./redis_init_script start
    ps -ef |grep redis
    

2. 主从复制

1. 编辑从配置文件

   replicaof master-node 6379
   masterauth root
   

2. 重启从 redis

   ./redis_init_script stop
   ./redis_init_script start
   

3. 主 redis 查看

   127.0.0.1:6379> info replication
   # Replication
   role:master
   connected_slaves:2
   slave0:ip=192.168.31.202,port=6379,state=online,offset=420,lag=1
   slave1:ip=192.168.31.203,port=6379,state=online,offset=420,lag=1
   master_failover_state:no-failover
   master_replid:c226480cd48b14c59701fa3a6d801009f8a464f8
   master_replid2:0000000000000000000000000000000000000000
   master_repl_offset:420
   second_repl_offset:-1
   repl_backlog_active:1
   repl_backlog_size:1048576
   repl_backlog_first_byte_offset:1
   repl_backlog_histlen:420
   127.0.0.1:6379>