企业级Redis开发运维从入门到实践 （24）— Redis Sentinel（哨兵）的安装配置
Redis Sentinel（哨兵）的安装配置
- 配置开启主从节点。
- 配置开启 sentinel 监控节点。（sentinel 是特殊的 redis，默认端口26379）
- 实际应该多台机器。
- 详细配置节点。
Redis主节点
- 启动：redis-server redis-7000.conf
- 配置：
port 7000
daemonize yes
pidfile /var/run/redis-7000.pid
logfile "7000.log"
dir "/opt/soft/redis/data/"
## ----- RDB -----
...
## ----- AOF -----
...
Redis从节点
- 启动：redis-server redis-7001.conf、redis-server redis-7002.conf
- 配置：
# slave - 1
port 7001
daemonize yes
pidfile /var/run/redis-7001.pid
logfile "7001.log"
dir "/opt/soft/redis/data/"
slaveof 127.0.0.1:7000
## ----- RDB -----
...
## ----- AOF -----
...
# slave - 2
port 7002
daemonize yes
pidfile /var/run/redis-7002.pid
logfile "7002.log"
dir "/opt/soft/redis/data/"
slaveof 127.0.0.1:7000
## ----- RDB -----
...
## ----- AOF -----
...
RDB 和 AOF 的配置查看：企业级Redis开发运维从入门到实践 （16）— RDB 和 企业级Redis开发运维从入门到实践 （17）— AOF
sentinel 主要配置
port ${port}
dir "/opt/soft/redis/data/"
logfile "${port}/log"
# sentinel监控的master的名字叫做mymaster,地址为127.0.0.1:7000；
# 当集群中有2个sentinel认为master死了时，才能真正认为该master已经不可用。
sentinel monitor mymaster 127.0.0.1 7000 2
# sentinel会向master发送心跳PING来确认master是否存活；默认配置是 30000 毫秒（即30秒）
sentinel down-after-milliseconds mymaster 30000
# 在发生failover主备切换时，并发或串行处理设置
sentinel parallel-syncs mymaster 1
# 故障转移时间
sentinel failover-timeout mymaster 180000
主、从节点的安装
主节点配置：
[[email protected] config]# vim redis-7000.conf
port 7000
daemonize yes
pidfile /var/run/redis-7000.pid
logfile "7000.log"
dir "/opt/soft/redis/redis/data/"
从节点配置：
- 复制并修改7001、7002的配置文件
[[email protected] config]# sed "s/7000/7001/g" redis-7000.conf > redis-7001.conf
[[email protected] config]# sed "s/7000/7002/g" redis-7000.conf > redis-7002.conf
[[email protected] config]# ll
total 24
-rw-r--r-- 1 carlosful staff 109B 10 21 15:18 redis-7000.conf
-rw-r--r-- 1 carlosful staff 109B 10 21 15:19 redis-7001.conf
-rw-r--r-- 1 carlosful staff 109B 10 21 15:19 redis-7002.conf
- 给7001、7002的配置文件追加复制的主节点信息并查看追加修改情况
[[email protected] config]# echo "slaveof 127.0.0.1 7000" >> redis-7001.conf
[[email protected] config]# echo "slaveof 127.0.0.1 7000" >> redis-7002.conf
[[email protected] config]# ll
total 24
-rw-r--r-- 1 carlosful staff 109B 10 21 15:18 redis-7000.conf
-rw-r--r-- 1 carlosful staff 132B 10 21 15:19 redis-7001.conf
-rw-r--r-- 1 carlosful staff 132B 10 21 15:19 redis-7002.conf
[[email protected] config]# cat redis-7000.conf
port 7000
daemonize yes
pidfile /var/run/redis-7000.pid
logfile "7000.log"
dir "/opt/soft/redis/redis/data/"
[[email protected] config]# cat redis-7001.conf
port 7001
daemonize yes
pidfile /var/run/redis-7001.pid
logfile "7001.log"
dir "/opt/soft/redis/redis/data/"
slaveof 127.0.0.1 7000
[[email protected] config]# cat redis-7002.conf
port 7002
daemonize yes
pidfile /var/run/redis-7002.pid
logfile "7002.log"
dir "/opt/soft/redis/redis/data/"
slaveof 127.0.0.1 7000
- 启动7000、7001、7002三个节点并查看进程和节点信息
[[email protected] config]# redis-server redis-7000.conf
[[email protected] config]# redis-cli -p 7000 ping
PONG
[[email protected] config]# redis-server redis-7001.conf
[[email protected] config]# redis-server redis-7002.conf
[[email protected] config]# ps -ef | grep redis-server | grep 700
501 93358 1 0 3:20下午 ?? 0:00.03 redis-server *:7000
501 93371 1 0 3:20下午 ?? 0:00.01 redis-server *:7001
501 93378 1 0 3:20下午 ?? 0:00.01 redis-server *:7002
[[email protected] config]# redis-cli -p 7000 info replication
# Replication
role:master
connected_slaves:2
slave0:ip=127.0.0.1,port:7001,state=online,offser=29,lag=1
slave1:ip=127.0.0.1,port:7002,state=online,offser=29,lag=1
master_repl_offset:29
repl_backing_active:1
repl_backing_size:1048576
repl_backing_first_byte_offset:2
repl_backing_histlen:28
sentinel 安装配置
- 复制sentinel.conf配置文件、进行修改
[[email protected] redis]# cp sentinel.conf config/
[[email protected] config]# cd config
[[email protected] config]# cat sentinel.conf | grep -v "#" | grep -v "^$"
port 26379
dir /tmp
sentinel monitor mymaster 127.0.0.1:6379 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
[[email protected] config]# cat sentinel.conf | grep -v "#" | grep -v "^$" > redis-sentinel-26379.conf
[[email protected] config]# ll
total 48
-rw-r--r-- 1 carlosful staff 0B 10 21 15:20 7000.log
-rw-r--r-- 1 carlosful staff 0B 10 21 15:20 7001.log
-rw-r--r-- 1 carlosful staff 0B 10 21 15:20 7002.log
-rw-r--r-- 1 carlosful staff 109B 10 21 15:18 redis-7000.conf
-rw-r--r-- 1 carlosful staff 109B 10 21 15:19 redis-7001.conf
-rw-r--r-- 1 carlosful staff 109B 10 21 15:19 redis-7002.conf
-rw-r--r-- 1 carlosful staff 188B 10 21 15:44 redis-sentinel-26379.conf
-rw-r--r-- 1 carlosful staff 6.9K 10 21 15:23 sentinel.conf
[[email protected] config]# vim redis-sentinel-26379.conf
port 26379
daemonize yes
dir /opt/soft/redis/redis/data/
logfile "26379.log"
sentinel monitor mymaster 127.0.0.1:7000 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
[[email protected] config]# ll
total 48
-rw-r--r-- 1 carlosful staff 0B 10 21 15:20 7000.log
-rw-r--r-- 1 carlosful staff 0B 10 21 15:20 7001.log
-rw-r--r-- 1 carlosful staff 0B 10 21 15:20 7002.log
-rw-r--r-- 1 carlosful staff 109B 10 21 15:18 redis-7000.conf
-rw-r--r-- 1 carlosful staff 109B 10 21 15:19 redis-7001.conf
-rw-r--r-- 1 carlosful staff 109B 10 21 15:19 redis-7002.conf
-rw-r--r-- 1 carlosful staff 224B 10 21 15:44 redis-sentinel-26379.conf
-rw-r--r-- 1 carlosful staff 6.9K 10 21 15:23 sentinel.conf
- 启动sentinel的26379节点并查看节点信息及配置文件（发现：sentinel不能做节点的操作，例如set；sentinel启动后会自动追加配置，隐藏默认配置）
[[email protected] config]# redis-sentinel redis-sentinel-26379.conf
[[email protected] config]# ps -ef | grep redis-sentinel
501 93821 1 0 3:47下午 ?? 0:00.01 redis-sentinel *:26379 [sentinel]
501 93828 92491 0 3:47下午 ttys000 0:00.00 grep --color=auto --exclude-dir-.bar --exclude-dir-CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn redis-sentinel
# sentinel不能做节点的操作，例如set
[[email protected] config]# redis-cli -p 26379
127.0.0.1:26379> set hello world
(error) ERR unknown command 'set'
127.0.0.1:26379> ping
PONG
127.0.0.1:26379> info
...
# Sentinel
sentinel_master:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
master0:name=mymaster,status=ok,address=127.0.0.1:7000,slaves=2,sentinels=1
127.0.0.1:26379>exit
# sentinel启动后会自动追加配置，隐藏默认配置
[[email protected] config]# cat redis-sentinel-26379.conf
port 26379
daemonize yes
dir "/opt/soft/redis/redis-3.0.7/data"
logfile "26379.log"
sentinel monitor mymaster 127.0.0.1 7000 2
sentinel config-epoch mymaster 0
sentinel leader-epoch mymaster 0
sentinel known-slave mymaster 127.0.0.1 7002
# Generated by CONFIG REWRITE
sentinel known-slave mymaster 127.0.0.1 7001
sentinel curent-epoch 0
- 复制并修改26380、26381的配置文件
[[email protected] config]# sed "s/26379/26380/g" redis-sentinel-26379.conf > redis-sentinel-26380.conf
[[email protected] config]# sed "s/26379/26381/g" redis-sentinel-26379.conf > redis-sentinel-26381.conf
[[email protected] config]# ll
total 48
-rw-r--r-- 1 carlosful staff 0B 10 21 15:20 7000.log
-rw-r--r-- 1 carlosful staff 0B 10 21 15:20 7001.log
-rw-r--r-- 1 carlosful staff 0B 10 21 15:20 7002.log
-rw-r--r-- 1 carlosful staff 109B 10 21 15:18 redis-7000.conf
-rw-r--r-- 1 carlosful staff 109B 10 21 15:19 redis-7001.conf
-rw-r--r-- 1 carlosful staff 109B 10 21 15:19 redis-7002.conf
-rw-r--r-- 1 carlosful staff 338B 10 21 15:44 redis-sentinel-26379.conf
-rw-r--r-- 1 carlosful staff 338B 10 21 15:44 redis-sentinel-26380.conf
-rw-r--r-- 1 carlosful staff 338B 10 21 15:44 redis-sentinel-26381.conf
-rw-r--r-- 1 carlosful staff 6.9K 10 21 15:23 sentinel.conf
- 启动26380、26381的sentinel、查看sentinel进程及节点信息
[[email protected] config]# redis-sentinel redis-sentinel-26380.conf
[[email protected] config]# redis-sentinel redis-sentinel-26381.conf
[[email protected] config]# ps -ef | grep redis-sentinel
501 93821 1 0 3:47下午 ?? 0:00.46 redis-sentinel *:26379 [sentinel]
501 93887 1 0 3:50下午 ?? 0:00.20 redis-sentinel *:26380 [sentinel]
501 93896 1 0 3:50下午 ?? 0:00.20 redis-sentinel *:26381 [sentinel]
501 93828 92491 0 3:53下午 ttys000 0:00.00 grep --color=auto --exclude-dir-.bar --exclude-dir-CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn redis-sentinel
# 连接26380，查看信息，sentinel变为3个
[[email protected] config]# redis-cli -p 26380
127.0.0.1:26380> info
...
# Sentinel
sentinel_master:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
master0:name=mymaster,status=ok,address=127.0.0.1:7000,slaves=2,sentinels=3
127.0.0.1:26380>exit
# 连接26381，查看信息，sentinel变为3个
[[email protected] config]# redis-cli -p 26381
127.0.0.1:26381> info
...
# Sentinel
sentinel_master:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
master0:name=mymaster,status=ok,address=127.0.0.1:7000,slaves=2,sentinels=3
127.0.0.1:26391>exit