Redis Sentinel安装

sentinel架构说明：
主机： 10.10.10.47      Sentinel节点：  testdb47      Sentinel端口：  6378    Redis实例端口： 6379    角色：Master
主机： 10.10.10.62      Sentinel节点：  testdb62      Sentinel端口：  6378    Redis实例端口： 6379    角色：Slave
主机： 10.10.10.63      Sentinel节点：  testdb63      Sentinel端口：  6378    Redis实例端口： 6379    角色：Slave

 
在10.10.10.47/62/63 上安装Redis软件，步骤省略
 

建立复制关系
登录 testdb62
# su redis
$ redis-cli -h 10.10.10.62  -p 6379 -a 'AY*s23y7Qt5w+J#rz^FoEBBB*Rc$u^qg'
10.10.10.62:6379> SLAVEOF 10.10.10.47 6379
OK
10.10.10.62:6379> INFO replication
# Replication
role:slave
master_host:10.10.10.47
master_port:6379
master_link_status:up
master_last_io_seconds_ago:4
master_sync_in_progress:0
slave_repl_offset:14
slave_priority:100
slave_read_only:1
connected_slaves:0
master_replid:30018a98ae864edff807a94f50b8d0c2b714e35d
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:14
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:2147483648
repl_backlog_first_byte_offset:15
repl_backlog_histlen:0


登录 testdb63
# su redis
$ redis-cli -h 10.10.10.63  -p 6379 -a 'AY*s23y7Qt5w+J#rz^FoEBBB*Rc$u^qg'
10.10.10.63:6379> SLAVEOF 10.10.10.47 6379
OK
10.10.10.63:6379> INFO replication
# Replication
role:slave
master_host:10.10.10.47
master_port:6379
master_link_status:up
master_last_io_seconds_ago:6
master_sync_in_progress:0
slave_repl_offset:14
slave_priority:100
slave_read_only:1
connected_slaves:0
master_replid:30018a98ae864edff807a94f50b8d0c2b714e35d
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:14
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:2147483648
repl_backlog_first_byte_offset:1
repl_backlog_histlen:14



一主两从架构自此搭建成功。

 
参数配置和启动 Redis sentinel
su - redis

vi  /data/redis/conf/sentinel_6378.conf
bind 0.0.0.0
port 6378
daemonize yes
dir /data/redis/data
logfile "sentinel_6378.log"
loglevel debug
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel auth-pass mymaster AY*s23y7Qt5w+J#rz^FoEBBB*Rc$u^qg
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes


启动 Redis sentinel
redis-sentinel /data/redis/conf/sentinel_6378.conf


检测当前所有已启动的sentinel实例的状态。

$ redis-cli -h 10.10.10.47 -p 6378 info Sentinel
# Sentinel
sentinel_masters:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
sentinel_simulate_failure_flags:0
master0:name=mymaster,status=ok,address=127.0.0.1:6379,slaves=2,sentinels=4



或者登录任意一个已启动的sentinel实例
$ redis-cli -h 10.10.10.47 -p 6378
10.10.10.47:6378> sentinel sentinels mymaster
1)  1) "name"
    2) "c4db878bff2796c617d34d3a8492c3d54067e8c7"
    3) "ip"
    4) "10.10.10.62"
    5) "port"
    6) "6378"
    7) "runid"
    8) "c4db878bff2796c617d34d3a8492c3d54067e8c7"
    9) "flags"
   10) "sentinel"
   11) "link-pending-commands"
   12) "0"
   13) "link-refcount"
   14) "1"
   15) "last-ping-sent"
   16) "0"
   17) "last-ok-ping-reply"
   18) "271"
   19) "last-ping-reply"
   20) "271"
   21) "down-after-milliseconds"
   22) "30000"
   23) "last-hello-message"
   24) "316"
   25) "voted-leader"
   26) "?"
   27) "voted-leader-epoch"
   28) "0"
2)  1) "name"
    2) "f39ef24c41889c458ac93552819d202e575625d0"
    3) "ip"
    4) "127.0.0.1"
    5) "port"
    6) "6378"
    7) "runid"
    8) "f39ef24c41889c458ac93552819d202e575625d0"
    9) "flags"
   10) "sentinel"
   11) "link-pending-commands"
   12) "0"
   13) "link-refcount"
   14) "1"
   15) "last-ping-sent"
   16) "0"
   17) "last-ok-ping-reply"
   18) "619"
   19) "last-ping-reply"
   20) "619"
   21) "down-after-milliseconds"
   22) "30000"
   23) "last-hello-message"
   24) "639"
   25) "voted-leader"
   26) "?"
   27) "voted-leader-epoch"
   28) "0"
3)  1) "name"
    2) "3fcd7c5285251eaba1a674acf2a5e8fb0219aa83"
    3) "ip"
    4) "127.0.0.1"
    5) "port"
    6) "6378"
    7) "runid"
    8) "3fcd7c5285251eaba1a674acf2a5e8fb0219aa83"
    9) "flags"
   10) "sentinel"
   11) "link-pending-commands"
   12) "0"
   13) "link-refcount"
   14) "1"
   15) "last-ping-sent"
   16) "0"
   17) "last-ok-ping-reply"
   18) "959"
   19) "last-ping-reply"
   20) "959"
   21) "down-after-milliseconds"
   22) "30000"
   23) "last-hello-message"
   24) "338"
   25) "voted-leader"
   26) "?"
   27) "voted-leader-epoch"
   28) "0"



至此，Redis sentinel搭建完毕。