Redis 实战 —— Redis 主从复制

1. 搭建 redis 环境

根据 上一节的内容搭建 redis 环境

2. 配置 从节点

修改 redis.conf文件，并添加以下内容：

slaveof hadoop102 6379
masterauth 123456

3. 主从操作命令

1. 查看主从信息info replication

   hadoop102 节点：

   127.0.0.1:6379> info replication
   # Replication
   role:master
   connected_slaves:2
   slave0:ip=192.168.248.103,port=6379,state=online,offset=70,lag=0
   slave1:ip=192.168.248.104,port=6379,state=online,offset=70,lag=0
   master_replid:7764e11aba8404b9fbf1bcc84017ee8fe1231394
   master_replid2:0000000000000000000000000000000000000000
   master_repl_offset:70
   second_repl_offset:-1
   repl_backlog_active:1
   repl_backlog_size:20971520
   repl_backlog_first_byte_offset:1
   repl_backlog_histlen:70
   

   hadoop103 节点：

   127.0.0.1:6379> info replication
   # Replication
   role:slave
   master_host:hadoop102
   master_port:6379
   master_link_status:up
   master_last_io_seconds_ago:8
   master_sync_in_progress:0
   slave_repl_offset:350
   slave_priority:100
   slave_read_only:1
   connected_slaves:0
   master_replid:7764e11aba8404b9fbf1bcc84017ee8fe1231394
   master_replid2:0000000000000000000000000000000000000000
   master_repl_offset:350
   second_repl_offset:-1
   repl_backlog_active:1
   repl_backlog_size:20971520
   repl_backlog_first_byte_offset:1
   repl_backlog_histlen:350
   

2. 切换主节点

   hadoop103节点：

   127.0.0.1:6379> slaveof hadoop104 6379
   

3. 把自己切换成主节点

   127.0.0.1:6379> slaveof no one
   

4. 哨兵搭建

hadoop102

bind 0.0.0.0
daemonize yes
protected-mode no
port 26379
sentinel monitor mymaster 192.168.248.102 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 15000
sentinel announce-ip "192.168.248.102"
dir "/opt/module/redis"
logfile "/opt/module/redis/logs/sentinel.log"
sentinel auth-pass mymaster "123456"

hadoop103

bind 0.0.0.0
daemonize yes
protected-mode no
port 26379
sentinel monitor mymaster 192.168.248.102 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 15000
sentinel announce-ip "192.168.248.103"
dir "/opt/module/redis"
logfile "/opt/module/redis/logs/sentinel.log"
sentinel auth-pass mymaster "123456"

hadoop104

bind 0.0.0.0
daemonize yes
protected-mode no
port 26379
sentinel monitor mymaster 192.168.248.102 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 15000
sentinel announce-ip "192.168.248.104"
dir "/opt/module/redis"
logfile "/opt/module/redis/logs/sentinel.log"
sentinel auth-pass mymaster "123456"

5. 编写启动脚本

1. redis 启动脚本

   #! /bin/bash
   case $1 in
   "start"){
           /opt/module/redis/bin/redis-server /opt/module/redis/conf/redis.conf
   };;
   "stop"){
           pid=$(ps -ef | grep redis-server | grep -v "grep" | awk '{print $2}')
           echo "redis进程ID="$pid
           kill $pid
   };;
   esac
   

2. redis 集群启动脚本

   
   #! /bin/bash
   
   case $1 in
   "start"){
           for i in hadoop102 hadoop103 hadoop104
           do
                   ssh $i "/home/dwjf321/bin/redis.sh start"
           done
   };;
   "stop"){
           for i in hadoop102 hadoop103 hadoop104
           do
                   ssh $i "/home/dwjf321/bin/redis.sh stop"
           done
   };;
   esac
   

3. 哨兵启动脚本

   #! /bin/bash
   case $1 in
   "start"){
           /opt/module/redis/bin/redis-sentinel /opt/module/redis/conf/sentinel.conf
   };;
   "stop"){
           pid=$(ps -ef | grep redis-sentinel | grep -v "grep" | awk '{print $2}')
           echo "redis进程ID="$pid
           kill $pid
   };;
   esac
   

4. 哨兵集群启动脚本

   #! /bin/bash
   
   case $1 in
   "start"){
           for i in hadoop102 hadoop103 hadoop104
           do
                   ssh $i "/home/dwjf321/bin/sentinel.sh start"
           done
   };;
   "stop"){
           for i in hadoop102 hadoop103 hadoop104
           do
                   ssh $i "/home/dwjf321/bin/sentinel.sh stop"
           done
   };;
   esac