Redis一主多从哨兵模式
1、两台主机IP地址如下：
主: 192.168.3.81 端口：6379
从:192.168.3.82 端口：6379
从:192.168.3.82 端口：6380
2、首先建立Redis数据存储目录
mkdir /var/lib/data/
3、master(6379端口)Redis配置文件设置
vim /etc/redis-6379.conf
bind 0.0.0.0 protected-mode yes port 6379 tcp-backlog 511 timeout 0 tcp-keepalive 300 daemonize yes supervised no pidfile /var/run/redis_6379.pid loglevel notice logfile /var/log/redis/redis_6379.log databases 16 save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename dump_6379.rdb dir /var/lib/data masterauth 123456 slave-serve-stale-data yes slave-read-only yes repl-diskless-sync no repl-diskless-sync-delay 5 repl-disable-tcp-nodelay no slave-priority 100 requirepass lian919 appendonly yes appendfilename "appendonly_6379.aof" appendfsync everysec no-appendfsync-on-rewrite no auto-aof-rewrite-percentage 100 auto-aof-rewrite-min-size 64mb aof-load-truncated yes lua-time-limit 5000 slowlog-log-slower-than 10000 slowlog-max-len 128 latency-monitor-threshold 0 notify-keyspace-events "" hash-max-ziplist-entries 512 hash-max-ziplist-value 64 list-max-ziplist-size -2 list-compress-depth 0 set-max-intset-entries 512 zset-max-ziplist-entries 128 zset-max-ziplist-value 64 hll-sparse-max-bytes 3000 activerehashing yes client-output-buffer-limit normal 0 0 0 client-output-buffer-limit slave 256mb 64mb 60 client-output-buffer-limit pubsub 32mb 8mb 60 hz 10 aof-rewrite-incremental-fsync yes
3、slave(6379端口)配置文件设置
vim /etc/redis-6379.conf
bind 0.0.0.0 protected-mode yes port 6379 tcp-backlog 511 timeout 0 tcp-keepalive 300 daemonize yes supervised no pidfile /var/run/redis_6379.pid loglevel notice logfile /var/log/redis/redis_6379.log databases 16 save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename dump_6379.rdb dir /var/lib/data slaveof 192.168.3.81 6379 masterauth 123456 slave-serve-stale-data yes slave-read-only yes repl-diskless-sync no repl-diskless-sync-delay 5 repl-disable-tcp-nodelay no slave-priority 100 requirepass 123456 appendonly yes appendfilename "appendonly_6379.aof" appendfsync everysec no-appendfsync-on-rewrite no auto-aof-rewrite-percentage 100 auto-aof-rewrite-min-size 64mb aof-load-truncated yes lua-time-limit 5000 slowlog-log-slower-than 10000 slowlog-max-len 128 latency-monitor-threshold 0 notify-keyspace-events "" hash-max-ziplist-entries 512 hash-max-ziplist-value 64 list-max-ziplist-size -2 list-compress-depth 0 set-max-intset-entries 512 zset-max-ziplist-entries 128 zset-max-ziplist-value 64 hll-sparse-max-bytes 3000 activerehashing yes client-output-buffer-limit normal 0 0 0 client-output-buffer-limit slave 256mb 64mb 60 client-output-buffer-limit pubsub 32mb 8mb 60 hz 10 aof-rewrite-incremental-fsync yes
4、slave(6380端口)配置文件设置
vim /etc/redis-6380.conf
bind 0.0.0.0 protected-mode yes port 6380 tcp-backlog 511 timeout 0 tcp-keepalive 300 daemonize yes supervised no pidfile /var/run/redis_6380.pid loglevel notice logfile /var/log/redis/redis_6380.log databases 16 save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename dump_6380.rdb dir /var/lib/data slaveof 192.168.3.81 6379 masterauth 123456 slave-serve-stale-data yes slave-read-only yes repl-diskless-sync no repl-diskless-sync-delay 5 repl-disable-tcp-nodelay no slave-priority 100 requirepass 123456 appendonly yes appendfilename "appendonly_6380.aof" appendfsync everysec no-appendfsync-on-rewrite no auto-aof-rewrite-percentage 100 auto-aof-rewrite-min-size 64mb aof-load-truncated yes lua-time-limit 5000 slowlog-log-slower-than 10000 slowlog-max-len 128 latency-monitor-threshold 0 notify-keyspace-events "" hash-max-ziplist-entries 512 hash-max-ziplist-value 64 list-max-ziplist-size -2 list-compress-depth 0 set-max-intset-entries 512 zset-max-ziplist-entries 128 zset-max-ziplist-value 64 hll-sparse-max-bytes 3000 activerehashing yes client-output-buffer-limit normal 0 0 0 client-output-buffer-limit slave 256mb 64mb 60 client-output-buffer-limit pubsub 32mb 8mb 60 hz 10 aof-rewrite-incremental-fsync yes
注：关于配置文件说明查看：https://www.cnblogs.com/albert919/p/16511082.html
5、启动Redis主和从，启动命令如下
redis主启动命令：
redis-server /etc/redis-6379.conf
redis从(注：6379和6380端口)启动命令
redis-server /etc/redis-6379.conf redis-server /etc/redis-6380.conf
6、查看redis是否启动成功命令
ps -ef |grep redis
注：如果有redis启动进程说明启动成功
7、查看从库连接主库是否成功。查看命令使用进入redis交互模式输入 info replication：查看如同示例
注：
1、redis主库主库出现故障后，直接把从库切换为主库命令为
slaveof no one
2、redis如果是一主多从的情况，主库出现故障后，把其中一台从库切换为主库后。其它从库需要重新建立的的主从关系
slaveof 切换新的主库IP地址 切换新的主库端口
二、 哨兵模式配置
设置3个哨兵模式监控redis主从，如果redis主库宕机，至少两个哨兵节点同意才能切换。
3个哨兵分别建立在redis主从上面，redis主架设哨兵1，redis从架设哨兵2，哨兵3
1、哨兵模式端口分别为：
1、redis主哨兵(IP：192.168.3.81)：
哨兵1端口：26379 (注：配置文件默认端口就是26379)
2、redis从哨兵(IP: 192.168.3.82)
哨兵2端口：26379
哨兵3端口：26380
2、redis主哨兵(192.168.3.81)26379端口配置文件如下：
vim /etc/redis-sentinel-26379.conf
port 26379 protected-mode no daemonize yes dir /var/lib/data logfile /var/log/redis/sentinel_26379.log sentinel monitor mymaster 192.168.3.81 6379 2 sentinel auth-pass mymaster 123456 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 180000
3、redis从哨兵(IP：192.168.3.82)26379端口配置文件
vim /etc/redis-sentinel-26379.conf
port 26379 protected-mode no daemonize yes dir /var/lib/data logfile /var/log/redis/sentinel_26379.log sentinel monitor mymaster 192.168.3.81 6379 2 sentinel auth-pass mymaster 123456 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 180000
redis从哨兵(IP：192.168.3.82)26380端口配置文件
vim /etc/redis-sentinel-26380.conf
port 26380 protected-mode no daemonize yes dir /var/lib/data logfile /var/log/redis/sentinel_26380.log sentinel monitor mymaster 192.168.3.81 6379 2 sentinel auth-pass mymaster 123456 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 180000
注：
1、sentinel monitor mymaster 192.168.3.81 6379 2
monitor：代表监控
mymaster：设置的别名，这个别名可以根据自己进行修改
192.168.3.81 6379：192.168.3.81：代表的是redis主IP地址 6379：代表的是redis主端口
2：判断redis主节点失败至少需要2个Sentinel节点同意切换
2、关于配置文件说明访问：https://www.cnblogs.com/albert919/p/16511082.html
4、哨兵启动命令
26379端口哨兵启动命令：
redis-sentinel /etc/redis-sentinel-26379.conf
26380端口哨兵启动命令
redis-sentinel /etc/redis-sentinel-26380.conf
5、查看哨兵连接状态
redis-cli -p 26379 info sentinel
master0:name=mymaster,status=ok,address=192.168.3.81:6379,slaves=2,sentinels=3 红色方框内容说明
name=mymaster #这里的mymaster显示是配置文件里面sentinel monitor mymaster 192.168.3.81 6379 2 这里的mymaster设置
status=ok #连接状态
address=192.168.3.81:6379 #哨兵监控redis主ip地址和端口
slaves=2 #这里显示有两个redis从节点
sentinels=3 #这里代表有3个哨兵节点
