redis自动主从切换

4343223

127.0.0.1     7000     master
127.0.0.1     7001     slave
127.0.0.1     7002     slave
127.0.0.1     7003     slave
查看主上面连接的从


redis-cli -p 7000 info Replication


# Replication
role:master
connected_slaves:3
slave0:ip=127.0.0.1,port=7001,state=online,offset=2532,lag=0
slave1:ip=127.0.0.1,port=7002,state=online,offset=2532,lag=0
slave2:ip=127.0.0.1,port=7003,state=online,offset=2532,lag=1
master_repl_offset:2532
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2
repl_backlog_histlen:2531
创建sentinel配置文件


vim /redis_test/7000/sentinel.conf


port 26379
sentinel monitor master 127.0.0.1 7000 2
sentinel down-after-milliseconds master 5000
sentinel failover-timeout master 60000
sentinel config-epoch master 12
vim /redis_test/7001/sentinel.conf


port 26479
sentinel monitor master 127.0.0.1 7000 2
sentinel down-after-milliseconds master 5000
sentinel failover-timeout master 60000
sentinel config-epoch master 12
vim /redis_test/7002/sentinel.conf


port 26579
sentinel monitor master 127.0.0.1 7000 2
sentinel down-after-milliseconds master 5000
sentinel failover-timeout master 60000
sentinel config-epoch master 12
启动sentinel
/usr/src/redis/src/redis-server /redis_database/7000/sentinel.conf --sentinel &
/usr/src/redis/src/redis-server /redis_database/7001/sentinel.conf --sentinel &
/usr/src/redis/src/redis-server /redis_database/7002/sentinel.conf --sentinel &
将主7000关掉


redis-cli -p 7000 shutdown


redis-cli -p 7002 info replication


# Replication
role:master
connected_slaves:2
slave0:ip=127.0.0.1,port=7001,state=online,offset=6345,lag=0
slave1:ip=127.0.0.1,port=7003,state=online,offset=6345,lag=0
master_repl_offset:6345
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2
repl_backlog_histlen:6344


可以发现7002变成了新的主库