Redis哨兵(Sentinel)集群部署

恢弘志士之气，不宜妄自菲薄。这篇文章主要讲述Redis哨兵(Sentinel)集群部署相关的知识，希望能为你提供帮助。
三台主机系统:

[root@master ~]# cat /etc/redhat-releaseCentOS Linux release 7.8.2003 (Core)

redis版本:

redis-4.0.14

部署redis 1主2从：主库master的redis.conf配置文件如下：

[root@host-172-17-80-204 bin]# cat ../etc/redis.conf | grep -v \'^$\' | grep -v \'^#\'bind 172.17.80.204 127.0.0.1protected-mode yesport 6379daemonize yeslogfile "/usr/local/redis/redis.log"dir /usr/local/redisslave-serve-stale-data yesslave-read-only no#masterauth "redhat6.3"#主库不需要配置requirepass "redhat6.3"appendonly yesappendfilename "appendonly.aof"

从库node1的redis.conf配置文件如下：

[root@host-172-17-80-60 redis]# cat etc/redis.conf| grep -v \'^$\' | grep -v \'^#\'bind 172.17.80.60 127.0.0.1protected-mode yesport 6379daemonize yeslogfile "/usr/local/redis/redis.log"dir /usr/local/redisslaveof172.17.80.204 6379slave-serve-stale-data yesslave-read-only nomasterauth "redhat6.3"requirepass "redhat6.3"#此密码可以单独配置appendonly yesappendfilename "appendonly.aof"

从库node2的redis.conf配置文件如下：

[root@host-172-17-80-109 redis]# cat etc/redis.conf| grep -v \'^$\' | grep -v \'^#\'bind 172.17.80.109 127.0.0.1protected-mode yesport 6379daemonize yeslogfile "/usr/local/redis/redis.log"dir /usr/local/redisslaveof172.17.80.204 6379slave-serve-stale-data yesslave-read-only nomasterauth "redhat6.3"requirepass "redhat6.3"#此密码可以单独配置appendonly yesappendfilename "appendonly.aof"

登录master主库，查看主从的配置信息：

文章图片

部署redis 哨兵集群：依次将三台机器解压的redis包的sentinel.conf配置文件复制到reids的etc目录下:

cp redis-4.0.14/sentinel.conf /usr/local/redis/etc/

Master主上sentinel文件的配置：

[root@master etc]# cat sentinel.conf | grep -v \'^$\' | grep -v \'^#\' bind 172.17.80.204 127.0.0.1 port 26379 daemonize yes dir /usr/local/redis #主节点别名为mymaster,后面是ip和端口,2代表判断主节点失败至少需要2个sentinel节点同意 sentinel monitor master 172.17.80.204 6379 2 sentinel auth-pass master "redhat6.3" #主节点故障30秒后启用新的主节点 sentinel down-after-milliseconds master 30000#故障转移时最多可以有1个从节点同时对主节点进行数据同步,数字越大,用时越短,存在网络和IO开销 sentinel parallel-syncs master 1 sentinel failover-timeout master 180000 sentinel deny-scripts-reconfig yes

node1上的sentinel文件的配置：

[root@node01 etc]# cat sentinel.conf | grep -v \'^$\' | grep -v \'^#\'bind 172.17.80.60 127.0.0.1port 26380daemonize yesdir /usr/local/redissentinel monitor master 172.17.80.204 6379 2sentinel auth-pass master "redhat6.3"sentinel down-after-milliseconds master 30000sentinel parallel-syncs master 1sentinel failover-timeout master 180000sentinel deny-scripts-reconfig yes

node2上的sentinel文件的配置：

[root@host-172-17-80-109 etc]# cat sentinel.conf | grep -v \'^#\' | grep -v \'^$\'bind 172.17.80.109 127.0.0.1port 26381daemonize yesdir /usr/local/redissentinel monitor master 172.17.80.109 6379 2sentinel auth-pass master "redhat6.3"sentinel down-after-milliseconds master 30000sentinel parallel-syncs master 1sentinel failover-timeout master 180000sentinel deny-scripts-reconfig yes

登录master的哨兵查看sentinel配置信息：

[root@master etc]# redis-cli -p 26379127.0.0.1:26379> info sentinel# Sentinelsentinel_masters:1sentinel_tilt:0sentinel_running_scripts:0sentinel_scripts_queue_length:0sentinel_simulate_failure_flags:0master0:name=master,status=ok,address=172.17.80.204:6379,slaves=2,sentinels=3127.0.0.1:26379>

文章图片

登录node1的哨兵查看sentinel配置信息：

[root@node01 ~]# redis-cli -p 26380127.0.0.1:26380> info sentinel# Sentinelsentinel_masters:1sentinel_tilt:0sentinel_running_scripts:0sentinel_scripts_queue_length:0sentinel_simulate_failure_flags:0master0:name=master,status=ok,address=172.17.80.204:6379,slaves=2,sentinels=3

文章图片

登录node2的哨兵查看sentinel配置信息：

[root@host-172-17-80-109 ~]# redis-cli -p 26381127.0.0.1:26381> info sentinel# Sentinelsentinel_masters:1sentinel_tilt:0sentinel_running_scripts:0sentinel_scripts_queue_length:0sentinel_simulate_failure_flags:0master0:name=master,status=ok,address=172.17.80.204:6379,slaves=2,sentinels=3

文章图片

哨兵模式启动成功后，master的sentinel.conf配置文件发生变化：

文章图片

哨兵模式启动成功后，node1的sentinel.conf配置文件发生变化：

文章图片

哨兵模式启动成功后，node2的sentinel.conf配置文件发生变化：

文章图片

测试哨兵模式：kill redis master节点，其他从节点变化：主节点执行kill redis进程：

文章图片

登录node1节点查看sentinel哨兵选举变化：

[root@node01 redis]# redis-cli -p 26380127.0.0.1:26380> info sentinel# Sentinelsentinel_masters:1sentinel_tilt:0sentinel_running_scripts:0sentinel_scripts_queue_length:0sentinel_simulate_failure_flags:0master0:name=master,status=ok,address=172.17.80.109:6379,slaves=2,sentinels=3

【Redis哨兵(Sentinel)集群部署】

文章图片

登录node1 redis节点，查看redis主从配置信息：

[root@node01 redis]# redis-cli -a redhat6.3Warning: Using a password with \'-a\' option on the command line interface may not be safe.127.0.0.1:6379> info replication