部署 redis 哨兵模式高可用集群

Posted 2021-02-10

环境

master: 192.168.1.224
slave1: 192.168.1.225
slave2: 192.168.1.226

修改系统参数

#somaxconn
echo 1024 > /proc/sys/net/core/somaxconn
#overcommit_memory
vim /etc/sysctl.conf
vm.overcommit_memory = 1

安装redis 5

yum install -y gcc gcc-c++
wget http://download.redis.io/releases/redis-5.0.3.tar.gz
tar xzf redis-5.0.3.tar.gz
mv redis-5.0.3 redis
cd redis
make MALLOC=libc

master 配置文件 redis.conf 修改以下参数

#绑定IP
bind 192.168.1.224
#后台运行
daemonize yes
#设置密码
requirepass "redisPASSWORD"
#日志文件
logfile "/tmp/redis.log"
#最大使用内存字节数
maxmemory 536870912
#删除策略
maxmemory-policy allkeys-lru
#主从认证密码
masterauth "redisPASSWORD"

slave1 配置文件 redis.conf 修改以下参数

#绑定IP
bind 192.168.1.224
#后台运行
daemonize yes
#设置密码
requirepass "redisPASSWORD"
#日志文件
logfile "/tmp/redis.log"
#最大使用内存字节数
maxmemory 536870912
#删除策略
maxmemory-policy allkeys-lru
#主从认证密码
masterauth "redisPASSWORD"
#设置主节点
replicaof 192.168.1.224 6379

slave2 配置文件 redis.conf 修改以下参数

#绑定IP
bind 192.168.1.224
#后台运行
daemonize yes
#设置密码
requirepass "redisPASSWORD"
#日志文件
logfile "/tmp/redis.log"
#最大使用内存字节数
maxmemory 536870912
#删除策略
maxmemory-policy allkeys-lru
#主从认证密码
masterauth "redisPASSWORD"
#设置主节点
replicaof 192.168.1.224 6379

sentinel 配置文件 sentinel.conf,3个节点一样

port 26379
daemonize yes
logfile "/tmp/sentinel.log"
sentinel monitor mymaster 192.168.1.224 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel parallel-syncs mymaster 1
sentinel auth-pass mymaster redisPASSWORD

配置 redis 启动、停止脚步 redis.sh

#!/bin/bash
case $1 in
    "start")
        if(ps -ef | grep redis-server | grep -v grep > /dev/null); then
            echo "Redis is running!"
        else
            src/redis-server redis.conf
        fi
    ;;
    "stop")
        if(ps -ef | grep redis-server | grep -v grep > /dev/null); then
            kill -9 `ps -ef | grep redis-server | grep -v grep | awk ‘{print $2}‘`
        else
            echo "Redis is not running!"
        fi
    ;;
    "restart")
        if(ps -ef | grep redis-server | grep -v grep > /dev/null); then
            kill -9 `ps -ef | grep redis-server | grep -v grep | awk ‘{print $2}‘`
            src/redis-server redis.conf
        else
            echo "Redis is not running!"
            src/redis-server redis.conf
        fi
    ;;
    *)
        echo "Input Error! Example: sh redis.sh start | stop | restart"
    ;;
esac

配置 sentinel 启动、停止脚步 sentinel.sh

#!/bin/bash
case $1 in
    "start")
        if(ps -ef | grep redis-sentinel | grep -v grep > /dev/null); then
            echo "Redis sentinel is running!"
        else
            src/redis-sentinel sentinel.conf
        fi
    ;;
    "stop")
        if(ps -ef | grep redis-sentinel | grep -v grep > /dev/null); then
            kill -9 `ps -ef | grep redis-sentinel | grep -v grep | awk ‘{print $2}‘`
        else
            echo "Redis sentinel is not running!"
        fi
    ;;
    "restart")
        if(ps -ef | grep redis-sentinel | grep -v grep > /dev/null); then
            kill -9 `ps -ef | grep redis-sentinel | grep -v grep | awk ‘{print $2}‘`
            src/redis-sentinel sentinel.conf
        else
            echo "Redis sentinel is not running!"
            src/redis-sentinel sentinel.conf
        fi
    ;;
    *)
        echo "Input Error! Example: sh redis.sh start | stop | restart"
    ;;
esac

启动redis实例

sh redis.sh start

启动sentinel实例

sh sentinel.sh start

简单测试

set key1 value1
get key1

检查集群状态

info

测试 spring boot 连接 redis-sentinel，添加以下配置

redis:
    database: 0
    sentinel:
      master: mymaster
      nodes: 192.168.1.224:26379,192.168.1.225:26379,192.168.1.226:26379
    password: redisPASSWORD