部署redis sentinel

部署redis sentinel，节点信息：

172.17.9.131
172.17.9.133
172.17.9.136

redis配置文件redis_6379.conf

[root@host redis6379]# cat redis_6379.conf   (redis cluster配置文件，禁用cluster)
bind 0.0.0.0
protected-mode no
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize yes
supervised no
pidfile "/data/redis6379/redis6379.pid"
loglevel warning
logfile "/data/redis6379/redis6379.log"
masterauth "hankyoon"
requirepass "hankyoon"
databases 16

stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename "redis6379.rdb"
dir "/data/redis6379"
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
min-replicas-to-write 0
min-replicas-max-lag 10
maxmemory 6gb
maxmemory-policy volatile-lru
appendonly no
appendfilename "appendonly.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
#cluster-enabled yes
#cluster-config-file "nodes6379.conf"
#cluster-node-timeout 15000
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 replica 0 0 0
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsync yes
# Generated by CONFIG REWRITE
#cluster-require-full-coverage no
repl-timeout 600
#cluster-migration-barrier 0

启动三个单节点redis：

[root@host 172.17.9.131]# /usr/local/bin/redis-server /data/redis6379/redis_6379.conf

[root@host 172.17.9.133]# /usr/local/bin/redis-server /data/redis6379/redis_6379.conf

[root@host 172.17.9.136]# /usr/local/bin/redis-server /data/redis6379/redis_6379.conf

哨兵配置文件sentinel.conf

port 26379
daemonize yes
pidfile /data/redis6379/sentinel_26379.pid
logfile "/data/redis6379/sentinel_6379.log"
dir /data/redis6379
sentinel monitor mymaster 172.17.9.131 6379 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes
sentinel auth-pass mymaster hankyoon
#sentinel monitor mymaster 192.168.1.xxx 6379 1   #监控 人员组名/ip/端口/失效判定数（多少从端判断不同则认为master断开）  
#sentinel down-after-milliseconds mymaster 10000  #ping 超过 10000 毫秒则认为宕机  
#sentinel failover-timeout mymaster 900000        #主从切换超过 30000 毫秒则认为失败  
#sentinel can-failover mymaster yes               #master断开后是否允许判断进行故障转移  
#sentinel parallel-syncs mymaster 1               #从端继续同步新master的数量 

启动哨兵监听：

[root@host 172.17.9.131]# /usr/local/bin/redis-sentinel /data/redis/sentinel_6379.conf

[root@host 172.17.9.133]# /usr/local/bin/redis-sentinel /data/redis/sentinel_6379.conf

[root@host 172.17.9.136]# /usr/local/bin/redis-sentinel /data/redis/sentinel_6379.conf

redis sentinel 相关命令：

[root@host 172.17.9.131]# redis-cli -h 127.0.0.1 -p 26379 -a "hankyoon"
127.0.0.1:26379> SENTINEL masters             #列出所有master状态信息

127.0.0.1:26379> SENTINEL master mymaster      #列出某个master状态信息

127.0.0.1:26379> SENTINEL slaves mymaster      #列出某个master的所有slave和状态信息

127.0.0.1:26379> SENTINEL sentinels mymaster   #列出某个master的sentinels 

127.0.0.1:26379> SENTINEL get-master-addr-by-name mymaster #通过某个master获取其IP及port 

127.0.0.1:26379> SENTINEL ckquorum mymaster    #检查某个master是达到投票及故障转移条件

127.0.0.1:26379> SENTINEL flushconfig            #强制重写 SENTINEL 配置到磁盘文件中
  
127.0.0.1:26379> SENTINEL failover mymaster    #这个操作就注意了！强制进行故障转移！慎操作！

程序配置redis sentinel 端口为：26379