7.redis哨兵模式

1. 安装redis并设为开机启动

2. install_server.sh 安装 redis

3. 部署多台redis

4. redis设置密码

5. redis 持久化设置

6. redis 主从配置

7. redis哨兵模式

mkdir -p /etc/redis/sentinel
cp /opt/redis-stable/sentinel.conf /etc/redis/sentinel/6379.conf

vim /etc/redis/sentinel/6379.conf
# 修改如下配置
daemonize yes
pidfile /var/run/redis-sentinel-6379.pid
logfile /var/log/redis-sentinel-6379.log
# sentinel monitor <master-name> <ip> <redis-port> <quorum>
sentinel monitor mymaster 127.0.0.1 6379 2
# sentinel down-after-milliseconds <master-name> <milliseconds>
# Default is 30 seconds.
sentinel down-after-milliseconds mymaster 30000
# sentinel auth-pass <master-name> <password>
sentinel auth-pass mymaster 123456
# Default is 3 minutes.
sentinel failover-timeout mymaster 180000
# 复制
cp /etc/redis/sentinel/6379.conf /etc/redis/sentinel/6380.conf
vim /etc/redis/sentinel/6380.conf
# 修改如下配置
port 26380
pidfile /var/run/redis-sentinel-6380.pid
logfile /var/log/redis-sentinel-6380.log

# sentinel monitor <master-name> <ip> <redis-port> <quorum>
sentinel monitor mymaster 127.0.0.1 6379 2
# sentinel down-after-milliseconds <master-name> <milliseconds>
# Default is 30 seconds.
sentinel down-after-milliseconds mymaster 30000
# sentinel auth-pass <master-name> <password>
sentinel auth-pass mymaster 123456
# Default is 3 minutes.
sentinel failover-timeout mymaster 180000

# 启动
/usr/local/src/redis/bin/redis-server /etc/redis/sentinel/6379.conf --sentinel
/usr/local/src/redis/bin/redis-server /etc/redis/sentinel/6380.conf --sentinel

# 查看日志
tail -fn 300 /var/log/redis-sentinel-6379.log
tail -fn 300 /var/log/redis-sentinel-6380.log

# 关掉主节点 
/etc/init.d/redis_6379 stop

# 连接从节点客户端
/usr/local/src/redis/bin/redis-cli -a 123456 -c -h 127.0.0.1 -p 6380

# 查看主从信息
info replication
# 如图，role已经从slave 变成了master, 连接的从库也变为0

# 重启6379服务,按正常原先的master会变成slave


查看发现connected_slaves:0 ，原因是：之前做主从的时候，6379没有设置 masterauth 
注：建议后期要用哨兵模式，设置主从的时候要先设置masterauth，确保后期高可用能正常使用

# masterauth <master-password>
masterauth 123456