Beispielanalyse von Master-Slave-Replikation, Sentry und Clustering in Redis

vim /opt/redis-5.0.7/sentinel.conf
 
##17行，取消注释，关闭保护模式
protected-mode no
##21行，Redis哨兵默认的监听端口
port 26379
##26行，指定sentienel为后台启动
daemonize yes
##36行，指定日志存放路径
logfile "/var/log/sentinel.log"
##65行，指定数据库存放路径
dir "/var/lib/redis/6379"
##84行，修改，指定该哨兵节点监控192.168.122.10 6379这个主节点，该主节点的名称是mymaster
##最后的2的含义与主节点的故障判定有关；至少需要2个哨兵节点同意，才能判定故障并进行故障转移
sentinel monitor mymaster 192.168.122.10 6379 2
##113行，判定服务器down掉的时间周期，默认30000毫秒（30秒）
sentinel down-after-milliseconds mymaster 30000
##146行，故障节点的最大超时时间为180000毫秒（180秒）
sentinel failover-timeout mymaster 180000

cd /opt/redis-5.0.7/
redis-sentinel sentinel.conf &

[root@master redis-5.0.7]# redis-cli -p 26379 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=192.168.122.10:6379,slaves=2,sentinels=3

[root@node ~]# cd /etc/redis
[root@node redis]# mkdir -p redis-cluster/redis600{1..6}
[root@node redis]# for i in {1..6}
> do
> cp /opt/redis-5.0.7/redis.conf /etc/redis/redis-cluster/redis600$i
> cp /opt/redis-5.0.7/src/redis-cli /opt/redis-5.0.7/src/redis-server /etc/redis/redis-cluster/redis600$i
> done
[root@node redis]# ls -R redis-cluster/
redis-cluster/:
redis6001  redis6002  redis6003  redis6004  redis6005  redis6006
 
redis-cluster/redis6001:
redis-cli  redis.conf  redis-server
 
redis-cluster/redis6002:
redis-cli  redis.conf  redis-server
 
redis-cluster/redis6003:
redis-cli  redis.conf  redis-server
 
redis-cluster/redis6004:
redis-cli  redis.conf  redis-server
 
redis-cluster/redis6005:
redis-cli  redis.conf  redis-server
 
redis-cluster/redis6006:
redis-cli  redis.conf  redis-server

[root@node redis]# cd redis-cluster/redis6001
[root@node redis6001]# vim redis.conf 
 
##69行，注释掉bind项，默认监听所有网卡
#bind 127.0.0.1
##88行，修改，关闭保护模式
protected-mode no
##92行，修改，redis监听端口
port 6001
##136行，开启守护进程，以独立进程启动
daemonize yes
##832行，取消注释，开启群集功能
cluster-enabled yes
##840行，注销注释，群集名称文件设置
cluster-config-file nodes-6001.conf
##846行，注销注释，群集超时时间设置
cluster-node-timeout 15000
##700行，修改，开启AOF持久化
appendonly yes

[root@node redis6001]# for d in {1..6}
> do
> cd /etc/redis/redis-cluster/redis600$i
> ^C
[root@node redis6001]# for d in {1..6}
> do
> cd /etc/redis/redis-cluster/redis600$d
> redis-server redis.conf
> done
[root@node1 redis6006]# ps -ef | grep redis
root        992      1  0 13:45 ?        00:00:07 /usr/local/redis/bin/redis-server 0.0.0.0:6379
root       2289      1  0 14:41 ?        00:00:00 redis-server *:6001 [cluster]
root       2294      1  0 14:41 ?        00:00:00 redis-server *:6002 [cluster]
root       2299      1  0 14:41 ?        00:00:00 redis-server *:6003 [cluster]
root       2304      1  0 14:41 ?        00:00:00 redis-server *:6004 [cluster]
root       2309      1  0 14:41 ?        00:00:00 redis-server *:6005 [cluster]
root       2314      1  0 14:41 ?        00:00:00 redis-server *:6006 [cluster]
root       2450   2337  0 14:50 pts/0    00:00:00 grep --color=auto redis

[root@node redis6006]# redis-cli --cluster create 127.0.0.1:6001 127.0.0.1:6002 127.0.0.1:6003 127.0.0.1:6004 127.0.0.1:6005 127.0.0.1:6006 --cluster-replicas 1

[root@node1 redis6006]# redis-cli -p 6001 -c
#加-c参数，节点之前就可以互相跳转
127.0.0.1:6001> cluster slots
#查看节点的哈希槽编号范围
1) 1) (integer) 0
#哈希槽起始编号
   2) (integer) 5460
#哈希槽终止编号
   3) 1) "127.0.0.1"
      2) (integer) 6001
#node节点主
      3) "18e59f493579facea29abf90ca4050f566d66339"
   4) 1) "127.0.0.1"
      2) (integer) 6004
#node节点从
      3) "2635bf6a0c286ef910ec5da03dbdc7cde308c588"
2) 1) (integer) 10923
   2) (integer) 16383
   3) 1) "127.0.0.1"
      2) (integer) 6003
      3) "51460d417eb56537e5bd7e8c9581c66fdd817b3c"
   4) 1) "127.0.0.1"
      2) (integer) 6006
      3) "51a75667dcf21b530e69a3242a3e9f81f577168d"
3) 1) (integer) 5461
   2) (integer) 10922
   3) 1) "127.0.0.1"
      2) (integer) 6002
      3) "6381d68c06ddb7ac43c8f7d7b8da0644845dcd59"
   4) 1) "127.0.0.1"
      2) (integer) 6005
      3) "375ad927116d3aa845e95ad5f0586306e7ff3a96"
127.0.0.1:6001> set num 1
OK
127.0.0.1:6001> get num
"1"
127.0.0.1:6001> keys *
1) "num"
127.0.0.1:6001> quit
[root@node1 redis6006]# redis-cli -p 6002 -c
127.0.0.1:6002> keys *
#6002端口无键值对
(empty list or set)
127.0.0.1:6002> get num
-> Redirected to slot [2765] located at 127.0.0.1:6001
"1"
#6002端口获取到num键位于6001端口，切换到6001端口并显示键值
127.0.0.1:6001> set key1 11111
-> Redirected to slot [9189] located at 127.0.0.1:6002
OK
#6001端口创建键值对，将其存至6002端口，并切换至6002端口
127.0.0.1:6002>