Redis哨兵主从配置(半自动)

方便起见我们在一台机器上搭建，规划如下表：

角色	IP	端口号
master	127.0.0.1	6380
slave-1	127.0.0.1	6381
slave-2	127.0.0.1	6382
sentinel-1	127.0.0.1	26380
sentinel-2	127.0.0.1	26381
sentinel-3	127.0.0.1	26382

1、安装Redis

参考：Redis单机版半自动安装

2、自定义配置

2.1、master配置

# rm /data/redis/sentinel -fr
port=6380
# 过滤掉redis.conf中的注释和空行
# cat redis.conf | grep -v "#" | grep -v "^$" >/data/redis-$port/conf/redis.cnf
basepath="/data/redis/sentinel"
datapath="$basepath/$port/data"
conffile="$basepath/$port/conf/redis$port.conf"
logpath="$basepath/$port/logs"
mkdir $basepath/$port/{conf,logs,data} -p
#redis.conf具体配置
echo "#generated by echo" > $conffile
echo "port $port" >> $conffile
echo "daemonize yes" >> $conffile
echo "logfile $logpath/redis$port.log" >> $conffile
echo "save 10 3" >> $conffile
echo "stop-writes-on-bgsave-error yes"   >> $conffile
echo "rdbcompression yes">> $conffile
echo "rdbchecksum yes"   >> $conffile
echo "dbfilename dump$port.rdb"   >> $conffile
echo "dir $datapath" >> $conffile
echo "appendonly yes">> $conffile
echo "appendfilename appendonly$port.aof"   >> $conffile
echo "appendfsync everysec"  >> $conffile

2.2、启动/停止master

port=6380
basepath="/data/redis/sentinel"
redis-server $basepath/$port/conf/redis$port.conf
redis-cli -p $port ping
# 停止
port=6380
redis-cli -p $port shutdown

2.3、slave配置

slave1 和slave2都执行下面的脚本，就是需要将port修改一下

# rm /data/redis/sentinel -fr
port=6382
masterport=6380
masterip=127.0.0.1
# 过滤掉redis.conf中的注释和空行
# cat redis.conf | grep -v "#" | grep -v "^$" >/data/redis-$port/conf/redis.cnf
basedir="/data/redis/sentinel/$port"
datadir="$basedir/data"
conffile="$basedir/conf/redis$port.conf"
logpath="$basedir/logs"
mkdir $basedir/{conf,logs,data} -p
#redis.conf具体配置
echo "#generated by echo" > $conffile
echo "port $port" >> $conffile
echo "daemonize yes" >> $conffile
echo "logfile $logpath/redis$port.log" >> $conffile
echo "save 10 3" >> $conffile
echo "stop-writes-on-bgsave-error yes"   >> $conffile
echo "rdbcompression yes">> $conffile
echo "rdbchecksum yes"   >> $conffile
echo "dbfilename dump$port.rdb"   >> $conffile
echo "dir $datadir" >> $conffile
echo "appendonly yes">> $conffile
echo "appendfilename appendonly$port.aof"   >> $conffile
echo "appendfsync everysec"  >> $conffile
echo "slaveof $masterip $masterport" >> $conffile

2.4、启动/停止slave1/slave2

# 启动slave1
basepath="/data/redis/sentinel"
port=6381
redis-server $basepath/$port/conf/redis$port.conf
redis-cli -p $port ping

# 启动slave2
basepath="/data/redis/sentinel"
port=6382
redis-server $basepath/$port/conf/redis$port.conf
redis-cli -p $port ping

# 停止
port=6381
redis-cli -p $port shutdown
port=6382
redis-cli -p $port shutdown

3、验证主从

redis-cli -p 6380
set k1 v1

# 看看slave1上是否有了k1
redis-cli -p 6381
keys * 

# 看看slave2上是否有了k1
redis-cli -p 6382
keys *

# 使用info 或者 info replication 查看
info replication 

4、配置sentinel.conf

3个sentinel都执行下面的脚本，同样需要将port修改一下

port=26380
masterport=6380
masterip=127.0.0.1
dirpath="/data/redis/sentinel"
sentinelfile="$dirpath/sentinel$port.conf"
mkdir $dirpath -p
echo "#generated by echo" > $sentinelfile
echo "port $port"  >> $sentinelfile
echo "dir $dirpath"  >> $sentinelfile
echo "sentinel monitor mymaster $masterip $masterport 2"  >> $sentinelfile
# master（slave、sentinel）在30000内都无法访问，则认定为S_DOWN 
echo "sentinel down-after-milliseconds mymaster 30000"  >> $sentinelfile
# 故障转移时，同时连接新master的slave数量，为了避免同时从master同步数据导致在同一时间不可访问，尽量配置小点
echo "sentinel parallel-syncs mymaster 1"  >> $sentinelfile
echo "sentinel failover-timeout mymaster 180000"  >> $sentinelfile

5、启动sentinel

port=26380
dirpath="/data/redis/sentinel"
sentinelfile="$dirpath/sentinel$port.conf"
redis-sentinel $sentinelfile

port=26381
dirpath="/data/redis/sentinel"
sentinelfile="$dirpath/sentinel$port.conf"
redis-sentinel $sentinelfile

port=26382
dirpath="/data/redis/sentinel"
sentinelfile="$dirpath/sentinel$port.conf"
redis-sentinel $sentinelfile

6、验证故障转移

# 停止master
redis-cli -p 6380 shutdown
# 过30秒后查看 两个slave：info replication
info replication
# 重启master
port=6380
redis-server $basepath/$port/conf/redis$port.conf
# 查看老的master现在的角色是否是slave
info replication

本文地址：https://blog.csdn.net/dingshuo168/article/details/109631762