redis安装

#创建一个专门存放软件的目录
mkdir /opt/software
cd /opt/software
#下载
wget https://download.redis.io/releases/redis-6.2.6.tar.gz
#解压
tar -zxvf redis-6.2.6.tar.gz
#进入src目录安装
cd redis-6.2.6/src
#指定安装到目录
make PREFIX=/usr/local/redis install
#测试是否成功
cd /usr/local/redis/bin
#启动
./redis-server 
#访问
./redis-cli

ps：/bin/sh: cc: command not found

yum install gcc gcc-c++ libstdc++-devel

配置详解

redis配置详解 | 小鹏驿站 (gitee.io)

建议修改配置

# 后台启动
daemonize yes
# rdb文件存放
dbfilename dump6379.rdb

创建redis-server软链

ln -s /usr/local/redis/bin/redis-server /usr/local/bin/redis-server
ln -s /usr/local/redis/bin/redis-cli /usr/local/bin/redis-cli

开机启动配置

vim /etc/systemd/system/redis-server.service

粘贴内容

[Unit]
Description=The redis-server Process Manager
After=syslog.target network.target


[Service]
Type=simple
PIDFile=/var/run/redis_6379.pid
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/redis.conf
ExecReload=/bin/kill -USR2 $MAINPID
ExecStop=/bin/kill -SIGINT $MAINPID


[Install]
WantedBy=multi-user.target

设置启动命令

systemctl daemon-reload 
systemctl start redis-server.service 
systemctl enable redis-server.servic
systemctl status redis-server.service 

哨兵配置

准备三份配置文件

cd /opt/software
mkdir redis-sentinel
cd redis-sentinel
#-r 包含目录复制
cp -r /opt/software/redis-6.2.6/ .
mv redis-6.2.6 redis-6.2.6-6380
cp -r redis-6.2.6-6380 redis-6.2.6-6381
cp -r redis-6.2.6-6380 redis-6.2.6-6382

修改主节点配置

vim /opt/software/redis-sentinel/redis-6.2.6-6380/redis.conf

修改redis.conf

#只需要修改端口
port 6380

修改sentinel.conf

#修改port
port 26380
#开启守护线程
daemonize yes 
#sentinel monitor <master-group-name> <ip> <port> <quorum>
#master-group-name是集群名称 quorum是需要同意主节点不可用的Sentinel的数量
sentinel monitor mymaster 192.168.101.123 6380 2
#主节点密码，如果有
#sentinel auth-pass <master-name> <password>

修改两个从节点

vim /opt/software/redis-sentinel/redis-6.2.6-6381/redis.conf

修改redis.conf

#修改port（一个为6381，另一个为6382）
port 6381
#主从复制 replicaof <masterip> <masterport>
replicaof 192.168.101.123 6380
#主节点密码 masterauth <master-password>
#masterauth 主节点密码

修改sentinel.conf

#修改port（一个为26381，另一个为26382）
port 26381
#开启守护线程
daemonize yes 
#sentinel monitor <master-group-name> <ip> <port> <quorum>
sentinel monitor mymaster 192.168.101.123 6380 2
#主节点密码
#sentinel auth-pass mymaster 主节点密码

启动哨兵模式

maste和slave启动

cd /usr/local/redis/bin
# & 后台启动
./redis-server /opt/software/redis-sentinel/redis-6.2.6-6380/redis.conf &
./redis-server /opt/software/redis-sentinel/redis-6.2.6-6381/redis.conf &
./redis-server /opt/software/redis-sentinel/redis-6.2.6-6382/redis.conf &

sentinel启动

cd /usr/local/redis/bin

./redis-sentinel /opt/software/redis-sentinel/redis-6.2.6-6380/sentinel.conf
./redis-sentinel /opt/software/redis-sentinel/redis-6.2.6-6381/sentinel.conf
./redis-sentinel /opt/software/redis-sentinel/redis-6.2.6-6382/sentinel.conf

测试哨兵模式

分别连接

./redis-cli -p 6380
./redis-cli -p 6381
./redis-cli -p 6382

查看角色信息

192.168.101.123:6380>info
#role:master
192.168.101.123:6381>info
#role:slave
192.168.101.123:6382>info
#role:slave

测试master切换，手动shutdown主服务器,过一会重新启动6380

./redis-cli -p 6380 shutdown
./redis-server /opt/software/redis-sentinel/redis-6.2.6-6380/redis.conf &

再次查看角色信息

192.168.101.123:6380>info
#role:slave
192.168.101.123:6381>info
#role:master
192.168.101.123:6382>info
#role:slave

注意：

如果开始配置哨兵模式使用的ip是127.0.0.1,外部客户端无法连接，需要使用机器ip

修改redis.conf sentinel.conf中使用的ip之前停掉redis sentinel

./redis-cli -p 6380 shutdown

./redis-cli -p 6381 shutdown

./redis-cli -p 6382 shutdown

./redis-cli -p 26380 shutdown

./redis-cli -p 26382 shutdown

./redis-cli -p 26382 shutdown