Redis 主从配置以及主从自动切换

转自：http://blog.csdn.net/aa838260772/article/details/51165948

3台虚拟机

192.168.1.52

192.168.1.53

192.168.1.54

上来做这个操作:

1.机器上编译安装(3.0.7版本)Redis->wget http://download.redis.io/releases/redis-3.0.7.tar.gz

2.配置:

主机:192.168.1.52 从机:192.168.1.53 192.168.1.54

配置文件(redis.conf):

192.168.1.52:

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1. daemonize yes
2. pidfile “/var/run/redis.pid”
3. port 6379
4. tcp-backlog 511
5. timeout 0
6. tcp-keepalive 0
7. loglevel notice
8. logfile “/home/log/redis.log”
9. databases 16
10. save 900 1
11. save 300 10
12. save 60 10000
13. stop-writes-on-bgsave-error yes
14. rdbcompression yes
15. rdbchecksum yes
16. dbfilename “dump.rdb”
17. dir “/usr/local/redis-3.0.7”
18. slave-serve-stale-data yes
19. slave-read-only yes
20. repl-diskless-sync no
21. repl-diskless-sync-delay 5
22. repl-disable-tcp-nodelay no
23. slave-priority 100
24. appendonly no
25. appendfilename “appendonly.aof”
26. appendfsync everysec
27. no-appendfsync-on-rewrite no
28. auto-aof-rewrite-percentage 100
29. auto-aof-rewrite-min-size 64mb
30. aof-load-truncated yes
31. lua-time-limit 5000
32. slowlog-log-slower-than 10000
33. slowlog-max-len 128
34. latency-monitor-threshold 0
35. notify-keyspace-events “”
36. hash-max-ziplist-entries 512
37. hash-max-ziplist-value 64
38. list-max-ziplist-entries 512
39. list-max-ziplist-value 64
40. set-max-intset-entries 512
41. zset-max-ziplist-entries 128
42. zset-max-ziplist-value 64
43. hll-sparse-max-bytes 3000
44. activerehashing yes
45. client-output-buffer-limit normal 0 0 0
46. client-output-buffer-limit slave 256mb 64mb 60
47. client-output-buffer-limit pubsub 32mb 8mb 60
48. hz 10
49. aof-rewrite-incremental-fsync yes

从机(redis.conf):192.168.1.53 192.168.1.54

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1. [root@localhost redis-3.0.7]# cat redis.conf | egrep -v “^$|^#“
2. daemonize yes
3. pidfile “/var/run/redis.pid”
4. port 6379
5. tcp-backlog 511
6. timeout 0
7. tcp-keepalive 0
8. loglevel notice
9. logfile “/home/log/redis.log”
10. databases 16
11. save 900 1
12. save 300 10
13. save 60 10000
14. stop-writes-on-bgsave-error yes
15. rdbcompression yes
16. rdbchecksum yes
17. dbfilename “dump.rdb”
18. dir “/usr/local/redis-3.0.7”
19. slaveof 192.168.1.52 6379
20. slave-serve-stale-data yes
21. slave-read-only yes
22. repl-diskless-sync no
23. repl-diskless-sync-delay 5
24. repl-disable-tcp-nodelay no
25. slave-priority 100
26. appendonly no
27. appendfilename “appendonly.aof”
28. appendfsync everysec
29. no-appendfsync-on-rewrite no
30. auto-aof-rewrite-percentage 100
31. auto-aof-rewrite-min-size 64mb
32. aof-load-truncated yes
33. lua-time-limit 5000
34. slowlog-log-slower-than 10000
35. slowlog-max-len 128
36. latency-monitor-threshold 0
37. notify-keyspace-events “”
38. hash-max-ziplist-entries 512
39. hash-max-ziplist-value 64
40. list-max-ziplist-entries 512
41. list-max-ziplist-value 64
42. set-max-intset-entries 512
43. zset-max-ziplist-entries 128
44. zset-max-ziplist-value 64
45. hll-sparse-max-bytes 3000
46. activerehashing yes
47. client-output-buffer-limit normal 0 0 0
48. client-output-buffer-limit slave 256mb 64mb 60
49. client-output-buffer-limit pubsub 32mb 8mb 60
50. hz 10
51. aof-rewrite-incremental-fsync yes

3.将redis_server跑起来

查看信息:

redis-cli -h 192.168.1.52 -p 6379 info replication

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1. # Replication
2. role:master
3. connected_slaves:0
4. master_repl_offset:0
5. repl_backlog_active:0
6. repl_backlog_size:1048576
7. repl_backlog_first_byte_offset:0
8. repl_backlog_histlen:0

redis-cli -h 192.168.1.53 -p 6379 info replication

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1. # Replication
2. role:slave
3. master_host:192.168.1.52
4. master_port:6379
5. master_link_status:up
6. master_last_io_seconds_ago:2
7. master_sync_in_progress:0
8. slave_repl_offset:15
9. slave_priority:100
10. slave_read_only:1
11. connected_slaves:1
12. slave0:ip=192.168.1.54,port=6379,state=online,offset=1,lag=0
13. master_repl_offset:1
14. repl_backlog_active:1
15. repl_backlog_size:1048576
16. repl_backlog_first_byte_offset:2
17. repl_backlog_histlen:0

redis-cli -h 192.168.1.54 -p 6379 info replication

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1. # Replication
2. role:slave
3. master_host:192.168.1.52
4. master_port:6379
5. master_link_status:up
6. master_last_io_seconds_ago:1
7. master_sync_in_progress:0
8. slave_repl_offset:169
9. slave_priority:100
10. slave_read_only:1
11. connected_slaves:0
12. master_repl_offset:0
13. repl_backlog_active:0
14. repl_backlog_size:1048576
15. repl_backlog_first_byte_offset:0
16. repl_backlog_histlen:0

此时再来看192.168.1.52主从信息

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1. syswjdeMacBook-Air:shell syswj$ ./watch_redis.sh 52 info
2. 52
3. # Replication
4. role:master
5. connected_slaves:2
6. slave0:ip=192.168.1.53,port=6379,state=online,offset=211,lag=1
7. slave1:ip=192.168.1.54,port=6379,state=online,offset=211,lag=0
8. master_repl_offset:211
9. repl_backlog_active:1
10. repl_backlog_size:1048576
11. repl_backlog_first_byte_offset:2
12. repl_backlog_histlen:210

3.开启redis-sentinel进行主从监控切换管理(只开启一个实例)

配置

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1. port 26379
2. dir “/tmp”
3. sentinel monitor mymaster 192.168.1.52 6379 2
4. daemonize yes
5. sentinel down-after-milliseconds mymaster 10000
6. sentinel config-epoch mymaster 10
7. sentinel leader-epoch mymaster 10
8. logfile “/home/log/sen.log”
9. sentinel known-sentinel mymaster 127.0.0.1 26379 efbd30332f50847e0b0e9c5ab0adc5dfb91823d2
10. sentinel current-epoch 10

运行后:

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1. 3595:X 15 Apr 11:57:29.146 # Sentinel runid is fdc1c1d8a5adf48a5fecc229be42810a61eb8603
2. 3595:X 15 Apr 11:57:29.146 # +monitor master mymaster 192.168.1.52 6379 quorum 2
3. 3595:X 15 Apr 11:57:30.146 * +slave slave 192.168.1.53:6379 192.168.1.53 6379 @ mymaster 192.168.1.52 6379
4. 3595:X 15 Apr 11:57:30.156 * +slave slave 192.168.1.54:6379 192.168.1.54 6379 @ mymaster 192.168.1.52 6379
5. 3595:X 15 Apr 11:57:30.871 * -dup-sentinel master mymaster 192.168.1.52 6379 #duplicate of 127.0.0.1:26379 or fdc1c1d8a5adf48a5fecc229be42810a61eb8603
6. 3595:X 15 Apr 11:57:30.871 * +sentinel sentinel 127.0.0.1:26379 127.0.0.1 26379 @ mymaster 192.168.1.52 6379

已经监控到两个slaves

4.测试主从切换

关闭掉主redis: redis-cli -h 192.168.1.52 -p 6379 shutdown

发现54被切换成主redis了，53依然是从redis,不过从属于54了

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1. syswjdeMacBook-Air:shell syswj$ ./watch_redis.sh 54 info
2. 54
3. # Replication
4. role:master
5. connected_slaves:1
6. slave0:ip=192.168.1.53,port=6379,state=online,offset=179,lag=1
7. master_repl_offset:179
8. repl_backlog_active:1
9. repl_backlog_size:1048576
10. repl_backlog_first_byte_offset:2
11. repl_backlog_histlen:178
12. syswjdeMacBook-Air:shell syswj$ ./watch_redis.sh 53 info
13. 53
14. # Replication
15. role:slave
16. master_host:192.168.1.54
17. master_port:6379
18. master_link_status:up
19. master_last_io_seconds_ago:2
20. master_sync_in_progress:0
21. slave_repl_offset:320
22. slave_priority:100
23. slave_read_only:1
24. connected_slaves:0
25. master_repl_offset:0
26. repl_backlog_active:0
27. repl_backlog_size:1048576
28. repl_backlog_first_byte_offset:0
29. repl_backlog_histlen:0
30. syswjdeMacBook-Air:shell syswj$

查看主从管理日志:

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1. 3670:X 15 Apr 12:06:14.376 # +sdown master mymaster 192.168.1.52 6379
2. 3670:X 15 Apr 12:06:14.435 # +odown master mymaster 192.168.1.52 6379 #quorum 2/2
3. 3670:X 15 Apr 12:06:14.435 # +new-epoch 12
4. 3670:X 15 Apr 12:06:14.435 # +try-failover master mymaster 192.168.1.52 6379
5. 3670:X 15 Apr 12:06:14.444 # +vote-for-leader 96e852d3d56a2dc45b2505e22bd430d1d6c7de13 12
6. 3670:X 15 Apr 12:06:14.447 # 127.0.0.1:26379 voted for 96e852d3d56a2dc45b2505e22bd430d1d6c7de13 12
7. 3670:X 15 Apr 12:06:14.548 # +elected-leader master mymaster 192.168.1.52 6379
8. 3670:X 15 Apr 12:06:14.549 # +failover-state-select-slave master mymaster 192.168.1.52 6379
9. 3670:X 15 Apr 12:06:14.610 # +selected-slave slave 192.168.1.54:6379 192.168.1.54 6379 @ mymaster 192.168.1.52 6379
10. 3670:X 15 Apr 12:06:14.610 * +failover-state-send-slaveof-noone slave 192.168.1.54:6379 192.168.1.54 6379 @ mymaster 192.168.1.52 6379
11. 3670:X 15 Apr 12:06:14.678 * +failover-state-wait-promotion slave 192.168.1.54:6379 192.168.1.54 6379 @ mymaster 192.168.1.52 6379
12. 3670:X 15 Apr 12:06:15.491 # +promoted-slave slave 192.168.1.54:6379 192.168.1.54 6379 @ mymaster 192.168.1.52 6379
13. 3670:X 15 Apr 12:06:15.491 # +failover-state-reconf-slaves master mymaster 192.168.1.52 6379
14. 3670:X 15 Apr 12:06:15.548 * +slave-reconf-sent slave 192.168.1.53:6379 192.168.1.53 6379 @ mymaster 192.168.1.52 6379
15. 3670:X 15 Apr 12:06:16.550 * +slave-reconf-inprog slave 192.168.1.53:6379 192.168.1.53 6379 @ mymaster 192.168.1.52 6379
16. 3670:X 15 Apr 12:06:16.550 * +slave-reconf-done slave 192.168.1.53:6379 192.168.1.53 6379 @ mymaster 192.168.1.52 6379
17. 3670:X 15 Apr 12:06:16.648 # +failover-end master mymaster 192.168.1.52 6379
18. 3670:X 15 Apr 12:06:16.648 # +switch-master mymaster 192.168.1.52 6379 192.168.1.54 6379
19. 3670:X 15 Apr 12:06:16.651 * +slave slave 192.168.1.53:6379 192.168.1.53 6379 @ mymaster 192.168.1.54 6379
20. 3670:X 15 Apr 12:06:16.652 * +slave slave 192.168.1.52:6379 192.168.1.52 6379 @ mymaster 192.168.1.54 6379
21. 3670:X 15 Apr 12:06:26.683 # +sdown slave 192.168.1.52:6379 192.168.1.52 6379 @ mymaster 192.168.1.54 6379

来测试重新开启机器52:

稍等一段世界发现:

52也成为54得slave了

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1. syswjdeMacBook-Air:shell syswj$ ./watch_redis.sh 52 info
2. 52
3. # Replication
4. role:slave
5. master_host:192.168.1.54
6. master_port:6379
7. master_link_status:up
8. master_last_io_seconds_ago:2
9. master_sync_in_progress:0
10. slave_repl_offset:8252
11. slave_priority:100
12. slave_read_only:1
13. connected_slaves:0
14. master_repl_offset:0
15. repl_backlog_active:0
16. repl_backlog_size:1048576
17. repl_backlog_first_byte_offset:0
18. repl_backlog_histlen:0

哨兵日志如下:

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1. 3670:X 15 Apr 12:06:16.550 * +slave-reconf-done slave 192.168.1.53:6379 192.168.1.53 6379 @ mymaster 192.168.1.52 6379
2. 3670:X 15 Apr 12:06:16.648 # +failover-end master mymaster 192.168.1.52 6379
3. 3670:X 15 Apr 12:06:16.648 # +switch-master mymaster 192.168.1.52 6379 192.168.1.54 6379
4. 3670:X 15 Apr 12:06:16.651 * +slave slave 192.168.1.53:6379 192.168.1.53 6379 @ mymaster 192.168.1.54 6379
5. 3670:X 15 Apr 12:06:16.652 * +slave slave 192.168.1.52:6379 192.168.1.52 6379 @ mymaster 192.168.1.54 6379
6. 3670:X 15 Apr 12:06:26.683 # +sdown slave 192.168.1.52:6379 192.168.1.52 6379 @ mymaster 192.168.1.54 6379
7. 3670:X 15 Apr 12:07:54.741 # -sdown slave 192.168.1.52:6379 192.168.1.52 6379 @ mymaster 192.168.1.54 6379
8. 3670:X 15 Apr 12:08:04.734 * +convert-to-slave slave 192.168.1.52:6379 192.168.1.52 6379 @ mymaster 192.168.1.54 6379

5自带shell脚本方便操作

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1. #!/bin/bash
3. set_redis()
4. {
5. result=`redis-cli -h 192.168.1.$1 -p 6379 set $2 $3`
6. echo “192.168.1.$1:$result”
7. }
9. get_redis()
10. {
11. result=`redis-cli -h 192.168.1.$1 -p 6379 get $2`
12. echo “192.168.1.$1:$result”
13. }
15. get_info()
16. {
17. echo $1
18. redis-cli -h 192.168.1.$1 -p 6379 info replication
19. }
21. shut_down()
22. {
23. echo $1
24. redis-cli -h 192.168.1.$1 -p 6379 shutdown
25. }
27. if [ $# -lt 2 ];
28. then
29. echo “ip op a b”
30. exit 0
31. fi
33. case $2 in
34. set)
35. set_redis $1 $3 $4
36. ;;
37. get)
38. get_redis $1 $3
39. ;;
40. info)
41. get_info $1
42. ;;
43. shut)
44. shut_down $1
45. ;;
46. *)
47. echo “invalid parameter!…”
48. ;;
49. esac