20221127redis-sentinel集群搭建 – HYL Studio

视频版

https://www.bilibili.com/video/BV1u84y1y7Mu/

1.安装redis

环境信息，按官方文档准备三个节点


redis1
192.168.2.104
ssh redis1@192.168.2.104

redis2
192.168.2.166
ssh redis2@192.168.2.166

redis3
192.168.2.139
ssh redis3@192.168.2.139

redis1

192.168.2.104

ssh redis1@192.168.2.104

redis2

192.168.2.166

ssh redis2@192.168.2.166

redis3

192.168.2.139

ssh redis3@192.168.2.139

执行安装过程


curl -fsSL https://packages.redis.io/gpg | sudo gpg --dearmor -o /usr/share/keyrings/redis-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/redis-archive-keyring.gpg] https://packages.redis.io/deb $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/redis.list

sudo apt-get update
sudo apt-get install redis redis-sentinel

curl -fsSL https://packages.redis.io/gpg | sudo gpg --dearmor -o /usr/share/keyrings/redis-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/redis-archive-keyring.gpg] https://packages.redis.io/deb $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/redis.list

sudo apt-get update

sudo apt-get install redis redis-sentinel

2.配置集群复制配置

复制的配置，假设第一个是主节点。这里测试没做安全防护，生产记得加密码和网段限制


sudo vim /etc/redis/redis.conf
#config all nodes
bind * -::1
protected-mode no

#only in redis2 and redis3
replicaof 192.168.2.104 6379

sudo vim /etc/redis/redis.conf

#config all nodes

bind * -::1

protected-mode no

#only in redis2 and redis3

replicaof 192.168.2.104 6379

记得重启，之后测试集群复制情况，正常后继续配置sentinel


redis1@redis1:~$ redis-cli -p 6379
127.0.0.1:6379> get test
"2"
127.0.0.1:6379> set test 1
OK
127.0.0.1:6379> get test
"1"
127.0.0.1:6379> exit
redis1@redis1:~$ redis-cli -h 192.168.2.166 -p 6379
192.168.2.166:6379> get test
"1"
192.168.2.166:6379>
redis1@redis1:~$ ^C
redis1@redis1:~$ redis-cli -h 192.168.2.139 -p 6379
192.168.2.139:6379> get test
"1"
192.168.2.139:6379>

redis1@redis1:~$ redis-cli -p 6379

127.0.0.1:6379> get test

"2"

127.0.0.1:6379> set test 1

127.0.0.1:6379> get test

"1"

127.0.0.1:6379> exit

redis1@redis1:~$ redis-cli -h 192.168.2.166 -p 6379

192.168.2.166:6379> get test

"1"

192.168.2.166:6379>

redis1@redis1:~$ ^C

redis1@redis1:~$ redis-cli -h 192.168.2.139 -p 6379

192.168.2.139:6379> get test

"1"

192.168.2.139:6379>

3.配置sentinel

新建配置文件sentinel.conf 这里测试的是自己新建的，记得关掉系统的service防止干扰。实际应该修改/etc/redis下的配置


port 5000
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel parallel-syncs mymaster 1

#with ip or port mapping(docker or nat)
sentinel announce-ip <ip>
sentinel announce-port <port>

port 5000

sentinel monitor mymaster 127.0.0.1 6379 2

sentinel down-after-milliseconds mymaster 5000

sentinel failover-timeout mymaster 60000

sentinel parallel-syncs mymaster 1

#with ip or port mapping(docker or nat)

sentinel announce-ip <ip>

sentinel announce-port <port>

启动成功效果


redis1@redis1:~$ redis-sentinel sentinel.conf
3385:X 27 Nov 2022 12:11:35.380 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
3385:X 27 Nov 2022 12:11:35.380 # Redis version=7.0.5, bits=64, commit=00000000, modified=0, pid=3385, just started
3385:X 27 Nov 2022 12:11:35.380 # Configuration loaded
3385:X 27 Nov 2022 12:11:35.381 * Increased maximum number of open files to 10032 (it was originally set to 1024).
3385:X 27 Nov 2022 12:11:35.381 * monotonic clock: POSIX clock_gettime
                _._
           _.-``__ ''-._
      _.-``    `.  `_.  ''-._           Redis 7.0.5 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._
 (    '      ,       .-`  | `,    )     Running in sentinel mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 5000
 |    `-._   `._    /     _.-'    |     PID: 3385
  `-._    `-._  `-./  _.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |           https://redis.io
  `-._    `-._`-.__.-'_.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |
  `-._    `-._`-.__.-'_.-'    _.-'
      `-._    `-.__.-'    _.-'
          `-._        _.-'
              `-.__.-'

3385:X 27 Nov 2022 12:11:35.387 * Sentinel new configuration saved on disk
3385:X 27 Nov 2022 12:11:35.387 # Sentinel ID is 9a7a4e3269530706fd1002c3018a3f0c525c25d6
3385:X 27 Nov 2022 12:11:35.387 # +monitor master mymaster 192.168.2.104 6379 quorum 2
3385:X 27 Nov 2022 12:11:52.666 * +sentinel sentinel ea6cbec52f9c04c6c325414a05562a69b503129c 192.168.2.166 5000 @ mymaster 192.168.2.104 6379
3385:X 27 Nov 2022 12:11:52.670 * Sentinel new configuration saved on disk
3385:X 27 Nov 2022 12:11:59.182 * +sentinel sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379
3385:X 27 Nov 2022 12:11:59.186 * Sentinel new configuration saved on disk

redis1@redis1:~$ redis-sentinel sentinel.conf

3385:X 27 Nov 2022 12:11:35.380 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo

3385:X 27 Nov 2022 12:11:35.380 # Redis version=7.0.5, bits=64, commit=00000000, modified=0, pid=3385, just started

3385:X 27 Nov 2022 12:11:35.380 # Configuration loaded

3385:X 27 Nov 2022 12:11:35.381 * Increased maximum number of open files to 10032 (it was originally set to 1024).

3385:X 27 Nov 2022 12:11:35.381 * monotonic clock: POSIX clock_gettime

_._

_.-``__ ''-._

_.-`` `. `_. ''-._ Redis 7.0.5 (00000000/0) 64 bit

.-`` .-```. ```\/ _.,_ ''-._

( ' , .-` | `, ) Running in sentinel mode

|`-._`-...-` __...-.``-._|'` _.-'| Port: 5000

| `-._ `._ / _.-' | PID: 3385

`-._ `-._ `-./ _.-' _.-'

|`-._`-._ `-.__.-' _.-'_.-'|

| `-._`-._ _.-'_.-' | https://redis.io

`-._ `-._`-.__.-'_.-' _.-'

|`-._`-._ `-.__.-' _.-'_.-'|

| `-._`-._ _.-'_.-' |

`-._ `-._`-.__.-'_.-' _.-'

`-._ `-.__.-' _.-'

`-._ _.-'

`-.__.-'

3385:X 27 Nov 2022 12:11:35.387 * Sentinel new configuration saved on disk

3385:X 27 Nov 2022 12:11:35.387 # Sentinel ID is 9a7a4e3269530706fd1002c3018a3f0c525c25d6

3385:X 27 Nov 2022 12:11:35.387 # +monitor master mymaster 192.168.2.104 6379 quorum 2

3385:X 27 Nov 2022 12:11:52.666 * +sentinel sentinel ea6cbec52f9c04c6c325414a05562a69b503129c 192.168.2.166 5000 @ mymaster 192.168.2.104 6379

3385:X 27 Nov 2022 12:11:52.670 * Sentinel new configuration saved on disk

3385:X 27 Nov 2022 12:11:59.182 * +sentinel sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379

3385:X 27 Nov 2022 12:11:59.186 * Sentinel new configuration saved on disk

观察端口监听5000


redis1@redis1:~$ netstat -anp|grep 5000
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 0.0.0.0:5000            0.0.0.0:*               LISTEN      3385/redis-sentinel
tcp        0      0 192.168.2.104:55560     192.168.2.139:5000      ESTABLISHED 3385/redis-sentinel
tcp        0      0 192.168.2.104:44506     192.168.2.166:5000      ESTABLISHED 3385/redis-sentinel
tcp        0      0 192.168.2.104:5000      192.168.2.166:36802     ESTABLISHED 3385/redis-sentinel
tcp        0      0 192.168.2.104:5000      192.168.2.139:33910     ESTABLISHED 3385/redis-sentinel
tcp6       0      0 :::5000                 :::*                    LISTEN      3385/redis-sentinel

redis1@redis1:~$ netstat -anp|grep 5000

(Not all processes could be identified, non-owned process info

will not be shown, you would have to be root to see it all.)

tcp 0 0 0.0.0.0:5000 0.0.0.0:* LISTEN 3385/redis-sentinel

tcp 0 0 192.168.2.104:55560 192.168.2.139:5000 ESTABLISHED 3385/redis-sentinel

tcp 0 0 192.168.2.104:44506 192.168.2.166:5000 ESTABLISHED 3385/redis-sentinel

tcp 0 0 192.168.2.104:5000 192.168.2.166:36802 ESTABLISHED 3385/redis-sentinel

tcp 0 0 192.168.2.104:5000 192.168.2.139:33910 ESTABLISHED 3385/redis-sentinel

tcp6 0 0 :::5000 :::* LISTEN 3385/redis-sentinel

查看集群状态


sentinel master mymaster
SENTINEL get-master-addr-by-name mymaster
SENTINEL replicas mymaster
SENTINEL sentinels mymaster

sentinel master mymaster

SENTINEL get-master-addr-by-name mymaster

SENTINEL replicas mymaster

SENTINEL sentinels mymaster

redis1


redis1@redis1:~$ redis-cli -p 5000
127.0.0.1:5000> sentinel master mymaster
 1) "name"
 2) "mymaster"
 3) "ip"
 4) "192.168.2.104"
 5) "port"
 6) "6379"
 7) "runid"
 8) "4097e9a96cdb74dd4239aede54843e33104e6913"
 9) "flags"
10) "master"
11) "link-pending-commands"
12) "0"
13) "link-refcount"
14) "1"
15) "last-ping-sent"
16) "0"
17) "last-ok-ping-reply"
18) "244"
19) "last-ping-reply"
20) "244"
21) "down-after-milliseconds"
22) "5000"
23) "info-refresh"
24) "3457"
25) "role-reported"
26) "master"
27) "role-reported-time"
28) "103880"
29) "config-epoch"
30) "0"
31) "num-slaves"
32) "0"
33) "num-other-sentinels"
34) "2"
35) "quorum"
36) "2"
37) "failover-timeout"
38) "60000"
39) "parallel-syncs"
40) "1"

127.0.0.1:5000> SENTINEL get-master-addr-by-name mymaster
1) "192.168.2.104"
2) "6379"

127.0.0.1:5000> SENTINEL sentinels mymaster
1)  1) "name"
    2) "ea6cbec52f9c04c6c325414a05562a69b503129c"
    3) "ip"
    4) "192.168.2.166"
    5) "port"
    6) "5000"
    7) "runid"
    8) "ea6cbec52f9c04c6c325414a05562a69b503129c"
    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) "241"
   19) "last-ping-reply"
   20) "241"
   21) "down-after-milliseconds"
   22) "5000"
   23) "last-hello-message"
   24) "763"
   25) "voted-leader"
   26) "?"
   27) "voted-leader-epoch"
   28) "0"
2)  1) "name"
    2) "095fc33d13e733d7f974faf0c2b2e6aba015fc3f"
    3) "ip"
    4) "192.168.2.139"
    5) "port"
    6) "5000"
    7) "runid"
    8) "095fc33d13e733d7f974faf0c2b2e6aba015fc3f"
    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) "241"
   19) "last-ping-reply"
   20) "241"
   21) "down-after-milliseconds"
   22) "5000"
   23) "last-hello-message"
   24) "425"
   25) "voted-leader"
   26) "?"
   27) "voted-leader-epoch"
   28) "0"

100

101

102

103

104

redis1@redis1:~$ redis-cli -p 5000

127.0.0.1:5000> sentinel master mymaster

1) "name"

2) "mymaster"

3) "ip"

4) "192.168.2.104"

5) "port"

6) "6379"

7) "runid"

8) "4097e9a96cdb74dd4239aede54843e33104e6913"

9) "flags"

10) "master"

11) "link-pending-commands"

12) "0"

13) "link-refcount"

14) "1"

15) "last-ping-sent"

16) "0"

17) "last-ok-ping-reply"

18) "244"

19) "last-ping-reply"

20) "244"

21) "down-after-milliseconds"

22) "5000"

23) "info-refresh"

24) "3457"

25) "role-reported"

26) "master"

27) "role-reported-time"

28) "103880"

29) "config-epoch"

30) "0"

31) "num-slaves"

32) "0"

33) "num-other-sentinels"

34) "2"

35) "quorum"

36) "2"

37) "failover-timeout"

38) "60000"

39) "parallel-syncs"

40) "1"

127.0.0.1:5000> SENTINEL get-master-addr-by-name mymaster

1) "192.168.2.104"

2) "6379"

127.0.0.1:5000> SENTINEL sentinels mymaster

1) 1) "name"

2) "ea6cbec52f9c04c6c325414a05562a69b503129c"

3) "ip"

4) "192.168.2.166"

5) "port"

6) "5000"

7) "runid"

8) "ea6cbec52f9c04c6c325414a05562a69b503129c"

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) "241"

19) "last-ping-reply"

20) "241"

21) "down-after-milliseconds"

22) "5000"

23) "last-hello-message"

24) "763"

25) "voted-leader"

26) "?"

27) "voted-leader-epoch"

28) "0"

2) 1) "name"

2) "095fc33d13e733d7f974faf0c2b2e6aba015fc3f"

3) "ip"

4) "192.168.2.139"

5) "port"

6) "5000"

7) "runid"

8) "095fc33d13e733d7f974faf0c2b2e6aba015fc3f"

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) "241"

19) "last-ping-reply"

20) "241"

21) "down-after-milliseconds"

22) "5000"

23) "last-hello-message"

24) "425"

25) "voted-leader"

26) "?"

27) "voted-leader-epoch"

28) "0"

redis2


redis1@redis1:~$ redis-cli -h 192.168.2.166 -p 5000
192.168.2.166:5000> sentinel master mymaster
 1) "name"
 2) "mymaster"
 3) "ip"
 4) "192.168.2.104"
 5) "port"
 6) "6379"
 7) "runid"
 8) "4097e9a96cdb74dd4239aede54843e33104e6913"
 9) "flags"
10) "master"
11) "link-pending-commands"
12) "0"
13) "link-refcount"
14) "1"
15) "last-ping-sent"
16) "0"
17) "last-ok-ping-reply"
18) "979"
19) "last-ping-reply"
20) "979"
21) "down-after-milliseconds"
22) "5000"
23) "info-refresh"
24) "8165"
25) "role-reported"
26) "master"
27) "role-reported-time"
28) "188616"
29) "config-epoch"
30) "0"
31) "num-slaves"
32) "0"
33) "num-other-sentinels"
34) "2"
35) "quorum"
36) "2"
37) "failover-timeout"
38) "60000"
39) "parallel-syncs"
40) "1"
192.168.2.166:5000> SENTINEL sentinels mymaster
1)  1) "name"
    2) "095fc33d13e733d7f974faf0c2b2e6aba015fc3f"
    3) "ip"
    4) "192.168.2.139"
    5) "port"
    6) "5000"
    7) "runid"
    8) "095fc33d13e733d7f974faf0c2b2e6aba015fc3f"
    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) "855"
   19) "last-ping-reply"
   20) "855"
   21) "down-after-milliseconds"
   22) "5000"
   23) "last-hello-message"
   24) "166"
   25) "voted-leader"
   26) "?"
   27) "voted-leader-epoch"
   28) "0"
2)  1) "name"
    2) "9a7a4e3269530706fd1002c3018a3f0c525c25d6"
    3) "ip"
    4) "192.168.2.104"
    5) "port"
    6) "5000"
    7) "runid"
    8) "9a7a4e3269530706fd1002c3018a3f0c525c25d6"
    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) "855"
   19) "last-ping-reply"
   20) "855"
   21) "down-after-milliseconds"
   22) "5000"
   23) "last-hello-message"
   24) "64"
   25) "voted-leader"
   26) "?"
   27) "voted-leader-epoch"
   28) "0"
192.168.2.166:5000>

100

redis1@redis1:~$ redis-cli -h 192.168.2.166 -p 5000

192.168.2.166:5000> sentinel master mymaster

1) "name"

2) "mymaster"

3) "ip"

4) "192.168.2.104"

5) "port"

6) "6379"

7) "runid"

8) "4097e9a96cdb74dd4239aede54843e33104e6913"

9) "flags"

10) "master"

11) "link-pending-commands"

12) "0"

13) "link-refcount"

14) "1"

15) "last-ping-sent"

16) "0"

17) "last-ok-ping-reply"

18) "979"

19) "last-ping-reply"

20) "979"

21) "down-after-milliseconds"

22) "5000"

23) "info-refresh"

24) "8165"

25) "role-reported"

26) "master"

27) "role-reported-time"

28) "188616"

29) "config-epoch"

30) "0"

31) "num-slaves"

32) "0"

33) "num-other-sentinels"

34) "2"

35) "quorum"

36) "2"

37) "failover-timeout"

38) "60000"

39) "parallel-syncs"

40) "1"

192.168.2.166:5000> SENTINEL sentinels mymaster

1) 1) "name"

2) "095fc33d13e733d7f974faf0c2b2e6aba015fc3f"

3) "ip"

4) "192.168.2.139"

5) "port"

6) "5000"

7) "runid"

8) "095fc33d13e733d7f974faf0c2b2e6aba015fc3f"

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) "855"

19) "last-ping-reply"

20) "855"

21) "down-after-milliseconds"

22) "5000"

23) "last-hello-message"

24) "166"

25) "voted-leader"

26) "?"

27) "voted-leader-epoch"

28) "0"

2) 1) "name"

2) "9a7a4e3269530706fd1002c3018a3f0c525c25d6"

3) "ip"

4) "192.168.2.104"

5) "port"

6) "5000"

7) "runid"

8) "9a7a4e3269530706fd1002c3018a3f0c525c25d6"

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) "855"

19) "last-ping-reply"

20) "855"

21) "down-after-milliseconds"

22) "5000"

23) "last-hello-message"

24) "64"

25) "voted-leader"

26) "?"

27) "voted-leader-epoch"

28) "0"

192.168.2.166:5000>

redis3


redis1@redis1:~$ redis-cli -h 192.168.2.139 -p 5000
192.168.2.139:5000> sentinel master mymaster
 1) "name"
 2) "mymaster"
 3) "ip"
 4) "192.168.2.104"
 5) "port"
 6) "6379"
 7) "runid"
 8) "4097e9a96cdb74dd4239aede54843e33104e6913"
 9) "flags"
10) "master"
11) "link-pending-commands"
12) "0"
13) "link-refcount"
14) "1"
15) "last-ping-sent"
16) "0"
17) "last-ok-ping-reply"
18) "571"
19) "last-ping-reply"
20) "571"
21) "down-after-milliseconds"
22) "5000"
23) "info-refresh"
24) "8363"
25) "role-reported"
26) "master"
27) "role-reported-time"
28) "239355"
29) "config-epoch"
30) "0"
31) "num-slaves"
32) "0"
33) "num-other-sentinels"
34) "2"
35) "quorum"
36) "2"
37) "failover-timeout"
38) "60000"
39) "parallel-syncs"
40) "1"
192.168.2.139:5000> SENTINEL sentinels mymaster
1)  1) "name"
    2) "9a7a4e3269530706fd1002c3018a3f0c525c25d6"
    3) "ip"
    4) "192.168.2.104"
    5) "port"
    6) "5000"
    7) "runid"
    8) "9a7a4e3269530706fd1002c3018a3f0c525c25d6"
    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) "232"
   19) "last-ping-reply"
   20) "232"
   21) "down-after-milliseconds"
   22) "5000"
   23) "last-hello-message"
   24) "753"
   25) "voted-leader"
   26) "?"
   27) "voted-leader-epoch"
   28) "0"
2)  1) "name"
    2) "ea6cbec52f9c04c6c325414a05562a69b503129c"
    3) "ip"
    4) "192.168.2.166"
    5) "port"
    6) "5000"
    7) "runid"
    8) "ea6cbec52f9c04c6c325414a05562a69b503129c"
    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) "232"
   19) "last-ping-reply"
   20) "232"
   21) "down-after-milliseconds"
   22) "5000"
   23) "last-hello-message"
   24) "1740"
   25) "voted-leader"
   26) "?"
   27) "voted-leader-epoch"
   28) "0"

redis1@redis1:~$ redis-cli -h 192.168.2.139 -p 5000

192.168.2.139:5000> sentinel master mymaster

1) "name"

2) "mymaster"

3) "ip"

4) "192.168.2.104"

5) "port"

6) "6379"

7) "runid"

8) "4097e9a96cdb74dd4239aede54843e33104e6913"

9) "flags"

10) "master"

11) "link-pending-commands"

12) "0"

13) "link-refcount"

14) "1"

15) "last-ping-sent"

16) "0"

17) "last-ok-ping-reply"

18) "571"

19) "last-ping-reply"

20) "571"

21) "down-after-milliseconds"

22) "5000"

23) "info-refresh"

24) "8363"

25) "role-reported"

26) "master"

27) "role-reported-time"

28) "239355"

29) "config-epoch"

30) "0"

31) "num-slaves"

32) "0"

33) "num-other-sentinels"

34) "2"

35) "quorum"

36) "2"

37) "failover-timeout"

38) "60000"

39) "parallel-syncs"

40) "1"

192.168.2.139:5000> SENTINEL sentinels mymaster

1) 1) "name"

2) "9a7a4e3269530706fd1002c3018a3f0c525c25d6"

3) "ip"

4) "192.168.2.104"

5) "port"

6) "5000"

7) "runid"

8) "9a7a4e3269530706fd1002c3018a3f0c525c25d6"

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) "232"

19) "last-ping-reply"

20) "232"

21) "down-after-milliseconds"

22) "5000"

23) "last-hello-message"

24) "753"

25) "voted-leader"

26) "?"

27) "voted-leader-epoch"

28) "0"

2) 1) "name"

2) "ea6cbec52f9c04c6c325414a05562a69b503129c"

3) "ip"

4) "192.168.2.166"

5) "port"

6) "5000"

7) "runid"

8) "ea6cbec52f9c04c6c325414a05562a69b503129c"

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) "232"

19) "last-ping-reply"

20) "232"

21) "down-after-milliseconds"

22) "5000"

23) "last-hello-message"

24) "1740"

25) "voted-leader"

26) "?"

27) "voted-leader-epoch"

28) "0"

3.测试故障迁移

模拟主节点挂掉30s或者直接关掉服务,可以看到自动选主，并且修改slave的指向(redis2日志)

见加粗部分


sudo service redis-server stop
redis-cli -p 6379 DEBUG sleep 30

sudo service redis-server stop

redis-cli -p 6379 DEBUG sleep 30


redis1@redis1:~$ redis-sentinel sentinel.conf
3450:X 27 Nov 2022 12:23:13.821 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
3450:X 27 Nov 2022 12:23:13.821 # Redis version=7.0.5, bits=64, commit=00000000, modified=0, pid=3450, just started
3450:X 27 Nov 2022 12:23:13.821 # Configuration loaded
3450:X 27 Nov 2022 12:23:13.822 * Increased maximum number of open files to 10032 (it was originally set to 1024).
3450:X 27 Nov 2022 12:23:13.823 * monotonic clock: POSIX clock_gettime
                _._
           _.-``__ ''-._
      _.-``    `.  `_.  ''-._           Redis 7.0.5 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._
 (    '      ,       .-`  | `,    )     Running in sentinel mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 5000
 |    `-._   `._    /     _.-'    |     PID: 3450
  `-._    `-._  `-./  _.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |           https://redis.io
  `-._    `-._`-.__.-'_.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |
  `-._    `-._`-.__.-'_.-'    _.-'
      `-._    `-.__.-'    _.-'
          `-._        _.-'
              `-.__.-'

3450:X 27 Nov 2022 12:23:13.826 # Sentinel ID is 9a7a4e3269530706fd1002c3018a3f0c525c25d6
3450:X 27 Nov 2022 12:23:13.826 # +monitor master mymaster 192.168.2.104 6379 quorum 2
3450:X 27 Nov 2022 12:23:13.829 * +slave slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379
3450:X 27 Nov 2022 12:23:13.832 * Sentinel new configuration saved on disk
3450:X 27 Nov 2022 12:23:13.832 * +slave slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379
3450:X 27 Nov 2022 12:23:13.836 * Sentinel new configuration saved on disk
3450:X 27 Nov 2022 12:23:18.844 # +sdown sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379
3450:X 27 Nov 2022 12:23:18.844 # +sdown sentinel ea6cbec52f9c04c6c325414a05562a69b503129c 192.168.2.166 5000 @ mymaster 192.168.2.104 6379
3450:X 27 Nov 2022 12:23:25.263 # -sdown sentinel ea6cbec52f9c04c6c325414a05562a69b503129c 192.168.2.166 5000 @ mymaster 192.168.2.104 6379
3450:X 27 Nov 2022 12:23:37.694 # -sdown sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379
3450:X 27 Nov 2022 12:26:23.114 # +sdown master mymaster 192.168.2.104 6379
3450:X 27 Nov 2022 12:26:23.191 # +odown master mymaster 192.168.2.104 6379 #quorum 3/2
3450:X 27 Nov 2022 12:26:23.192 # +new-epoch 4
<strong>3450:X 27 Nov 2022 12:26:23.192 # +try-failover master mymaster 192.168.2.104 6379
3450:X 27 Nov 2022 12:26:23.197 * Sentinel new configuration saved on disk
3450:X 27 Nov 2022 12:26:23.197 # +vote-for-leader 9a7a4e3269530706fd1002c3018a3f0c525c25d6 4
3450:X 27 Nov 2022 12:26:23.200 # ea6cbec52f9c04c6c325414a05562a69b503129c voted for ea6cbec52f9c04c6c325414a05562a69b503129c 4
3450:X 27 Nov 2022 12:26:23.204 # 095fc33d13e733d7f974faf0c2b2e6aba015fc3f voted for ea6cbec52f9c04c6c325414a05562a69b503129c 4
3450:X 27 Nov 2022 12:26:24.346 # +config-update-from sentinel ea6cbec52f9c04c6c325414a05562a69b503129c 192.168.2.166 5000 @ mymaster 192.168.2.104 6379
3450:X 27 Nov 2022 12:26:24.346 # +switch-master mymaster 192.168.2.104 6379 192.168.2.139 6379
3450:X 27 Nov 2022 12:26:24.348 * +slave slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.139 6379
3450:X 27 Nov 2022 12:26:24.349 * +slave slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379
3450:X 27 Nov 2022 12:26:24.357 * Sentinel new configuration saved on disk
3450:X 27 Nov 2022 12:26:29.371 # +sdown slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379</strong>

redis1@redis1:~$ redis-sentinel sentinel.conf

3450:X 27 Nov 2022 12:23:13.821 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo

3450:X 27 Nov 2022 12:23:13.821 # Redis version=7.0.5, bits=64, commit=00000000, modified=0, pid=3450, just started

3450:X 27 Nov 2022 12:23:13.821 # Configuration loaded

3450:X 27 Nov 2022 12:23:13.822 * Increased maximum number of open files to 10032 (it was originally set to 1024).

3450:X 27 Nov 2022 12:23:13.823 * monotonic clock: POSIX clock_gettime

_._

_.-``__ ''-._

_.-`` `. `_. ''-._ Redis 7.0.5 (00000000/0) 64 bit

.-`` .-```. ```\/ _.,_ ''-._

( ' , .-` | `, ) Running in sentinel mode

|`-._`-...-` __...-.``-._|'` _.-'| Port: 5000

| `-._ `._ / _.-' | PID: 3450

`-._ `-._ `-./ _.-' _.-'

|`-._`-._ `-.__.-' _.-'_.-'|

| `-._`-._ _.-'_.-' | https://redis.io

`-._ `-._`-.__.-'_.-' _.-'

|`-._`-._ `-.__.-' _.-'_.-'|

| `-._`-._ _.-'_.-' |

`-._ `-._`-.__.-'_.-' _.-'

`-._ `-.__.-' _.-'

`-._ _.-'

`-.__.-'

3450:X 27 Nov 2022 12:23:13.826 # Sentinel ID is 9a7a4e3269530706fd1002c3018a3f0c525c25d6

3450:X 27 Nov 2022 12:23:13.826 # +monitor master mymaster 192.168.2.104 6379 quorum 2

3450:X 27 Nov 2022 12:23:13.829 * +slave slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379

3450:X 27 Nov 2022 12:23:13.832 * Sentinel new configuration saved on disk

3450:X 27 Nov 2022 12:23:13.832 * +slave slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379

3450:X 27 Nov 2022 12:23:13.836 * Sentinel new configuration saved on disk

3450:X 27 Nov 2022 12:23:18.844 # +sdown sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379

3450:X 27 Nov 2022 12:23:18.844 # +sdown sentinel ea6cbec52f9c04c6c325414a05562a69b503129c 192.168.2.166 5000 @ mymaster 192.168.2.104 6379

3450:X 27 Nov 2022 12:23:25.263 # -sdown sentinel ea6cbec52f9c04c6c325414a05562a69b503129c 192.168.2.166 5000 @ mymaster 192.168.2.104 6379

3450:X 27 Nov 2022 12:23:37.694 # -sdown sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379

3450:X 27 Nov 2022 12:26:23.114 # +sdown master mymaster 192.168.2.104 6379

3450:X 27 Nov 2022 12:26:23.191 # +odown master mymaster 192.168.2.104 6379 #quorum 3/2

3450:X 27 Nov 2022 12:26:23.192 # +new-epoch 4

<strong>3450:X 27 Nov 2022 12:26:23.192 # +try-failover master mymaster 192.168.2.104 6379

3450:X 27 Nov 2022 12:26:23.197 * Sentinel new configuration saved on disk

3450:X 27 Nov 2022 12:26:23.197 # +vote-for-leader 9a7a4e3269530706fd1002c3018a3f0c525c25d6 4

3450:X 27 Nov 2022 12:26:23.200 # ea6cbec52f9c04c6c325414a05562a69b503129c voted for ea6cbec52f9c04c6c325414a05562a69b503129c 4

3450:X 27 Nov 2022 12:26:23.204 # 095fc33d13e733d7f974faf0c2b2e6aba015fc3f voted for ea6cbec52f9c04c6c325414a05562a69b503129c 4

3450:X 27 Nov 2022 12:26:24.346 # +config-update-from sentinel ea6cbec52f9c04c6c325414a05562a69b503129c 192.168.2.166 5000 @ mymaster 192.168.2.104 6379

3450:X 27 Nov 2022 12:26:24.346 # +switch-master mymaster 192.168.2.104 6379 192.168.2.139 6379

3450:X 27 Nov 2022 12:26:24.348 * +slave slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.139 6379

3450:X 27 Nov 2022 12:26:24.349 * +slave slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379

3450:X 27 Nov 2022 12:26:24.357 * Sentinel new configuration saved on disk

3450:X 27 Nov 2022 12:26:29.371 # +sdown slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379</strong>


redis2@redis2:~$ redis-sentinel sentinel.conf
3098:X 27 Nov 2022 12:23:24.963 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
3098:X 27 Nov 2022 12:23:24.963 # Redis version=7.0.5, bits=64, commit=00000000, modified=0, pid=3098, just started
3098:X 27 Nov 2022 12:23:24.963 # Configuration loaded
3098:X 27 Nov 2022 12:23:24.965 * Increased maximum number of open files to 10032 (it was originally set to 1024).
3098:X 27 Nov 2022 12:23:24.965 * monotonic clock: POSIX clock_gettime
                _._
           _.-``__ ''-._
      _.-``    `.  `_.  ''-._           Redis 7.0.5 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._
 (    '      ,       .-`  | `,    )     Running in sentinel mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 5000
 |    `-._   `._    /     _.-'    |     PID: 3098
  `-._    `-._  `-./  _.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |           https://redis.io
  `-._    `-._`-.__.-'_.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |
  `-._    `-._`-.__.-'_.-'    _.-'
      `-._    `-.__.-'    _.-'
          `-._        _.-'
              `-.__.-'

3098:X 27 Nov 2022 12:23:24.968 # Sentinel ID is ea6cbec52f9c04c6c325414a05562a69b503129c
3098:X 27 Nov 2022 12:23:24.968 # +monitor master mymaster 192.168.2.104 6379 quorum 2
3098:X 27 Nov 2022 12:23:24.972 * +slave slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:23:24.975 * Sentinel new configuration saved on disk
3098:X 27 Nov 2022 12:23:24.975 * +slave slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:23:24.979 * Sentinel new configuration saved on disk
3098:X 27 Nov 2022 12:23:29.998 # +sdown sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:23:37.449 # -sdown sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:23.136 # +sdown master mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:23.237 # +odown master mymaster 192.168.2.104 6379 #quorum 2/2
3098:X 27 Nov 2022 12:26:23.237 # +new-epoch 4
3098:X 27 Nov 2022 12:26:23.237 # +try-failover master mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:23.242 * Sentinel new configuration saved on disk
3098:X 27 Nov 2022 12:26:23.242 # +vote-for-leader ea6cbec52f9c04c6c325414a05562a69b503129c 4
3098:X 27 Nov 2022 12:26:23.248 # 9a7a4e3269530706fd1002c3018a3f0c525c25d6 voted for 9a7a4e3269530706fd1002c3018a3f0c525c25d6 4
3098:X 27 Nov 2022 12:26:23.253 # 095fc33d13e733d7f974faf0c2b2e6aba015fc3f voted for ea6cbec52f9c04c6c325414a05562a69b503129c 4
3098:X 27 Nov 2022 12:26:23.333 # +elected-leader master mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:23.333 # +failover-state-select-slave master mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:23.417 # +selected-slave slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:23.417 * +failover-state-send-slaveof-noone slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:23.483 * +failover-state-wait-promotion slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:24.307 * Sentinel new configuration saved on disk
<strong>3098:X 27 Nov 2022 12:26:24.307 # +promoted-slave slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:24.307 # +failover-state-reconf-slaves master mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:24.394 * +slave-reconf-sent slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:25.322 * +slave-reconf-inprog slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:25.323 * +slave-reconf-done slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:25.399 # -odown master mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:25.399 # +failover-end master mymaster 192.168.2.104 6379
3098:X 27 Nov 2022 12:26:25.399 # +switch-master mymaster 192.168.2.104 6379 192.168.2.139 6379
3098:X 27 Nov 2022 12:26:25.400 * +slave slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.139 6379
3098:X 27 Nov 2022 12:26:25.400 * +slave slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379
3098:X 27 Nov 2022 12:26:25.403 * Sentinel new configuration saved on disk
3098:X 27 Nov 2022 12:26:30.447 # +sdown slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379
3098:X 27 Nov 2022 12:29:48.267 # -sdown slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379
3098:X 27 Nov 2022 12:29:58.242 * +convert-to-slave slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379</strong>

redis2@redis2:~$ redis-sentinel sentinel.conf

3098:X 27 Nov 2022 12:23:24.963 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo

3098:X 27 Nov 2022 12:23:24.963 # Redis version=7.0.5, bits=64, commit=00000000, modified=0, pid=3098, just started

3098:X 27 Nov 2022 12:23:24.963 # Configuration loaded

3098:X 27 Nov 2022 12:23:24.965 * Increased maximum number of open files to 10032 (it was originally set to 1024).

3098:X 27 Nov 2022 12:23:24.965 * monotonic clock: POSIX clock_gettime

_._

_.-``__ ''-._

_.-`` `. `_. ''-._ Redis 7.0.5 (00000000/0) 64 bit

.-`` .-```. ```\/ _.,_ ''-._

( ' , .-` | `, ) Running in sentinel mode

|`-._`-...-` __...-.``-._|'` _.-'| Port: 5000

| `-._ `._ / _.-' | PID: 3098

`-._ `-._ `-./ _.-' _.-'

|`-._`-._ `-.__.-' _.-'_.-'|

| `-._`-._ _.-'_.-' | https://redis.io

`-._ `-._`-.__.-'_.-' _.-'

|`-._`-._ `-.__.-' _.-'_.-'|

| `-._`-._ _.-'_.-' |

`-._ `-._`-.__.-'_.-' _.-'

`-._ `-.__.-' _.-'

`-._ _.-'

`-.__.-'

3098:X 27 Nov 2022 12:23:24.968 # Sentinel ID is ea6cbec52f9c04c6c325414a05562a69b503129c

3098:X 27 Nov 2022 12:23:24.968 # +monitor master mymaster 192.168.2.104 6379 quorum 2

3098:X 27 Nov 2022 12:23:24.972 * +slave slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:23:24.975 * Sentinel new configuration saved on disk

3098:X 27 Nov 2022 12:23:24.975 * +slave slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:23:24.979 * Sentinel new configuration saved on disk

3098:X 27 Nov 2022 12:23:29.998 # +sdown sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:23:37.449 # -sdown sentinel 095fc33d13e733d7f974faf0c2b2e6aba015fc3f 192.168.2.139 5000 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:23.136 # +sdown master mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:23.237 # +odown master mymaster 192.168.2.104 6379 #quorum 2/2

3098:X 27 Nov 2022 12:26:23.237 # +new-epoch 4

3098:X 27 Nov 2022 12:26:23.237 # +try-failover master mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:23.242 * Sentinel new configuration saved on disk

3098:X 27 Nov 2022 12:26:23.242 # +vote-for-leader ea6cbec52f9c04c6c325414a05562a69b503129c 4

3098:X 27 Nov 2022 12:26:23.248 # 9a7a4e3269530706fd1002c3018a3f0c525c25d6 voted for 9a7a4e3269530706fd1002c3018a3f0c525c25d6 4

3098:X 27 Nov 2022 12:26:23.253 # 095fc33d13e733d7f974faf0c2b2e6aba015fc3f voted for ea6cbec52f9c04c6c325414a05562a69b503129c 4

3098:X 27 Nov 2022 12:26:23.333 # +elected-leader master mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:23.333 # +failover-state-select-slave master mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:23.417 # +selected-slave slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:23.417 * +failover-state-send-slaveof-noone slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:23.483 * +failover-state-wait-promotion slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:24.307 * Sentinel new configuration saved on disk

<strong>3098:X 27 Nov 2022 12:26:24.307 # +promoted-slave slave 192.168.2.139:6379 192.168.2.139 6379 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:24.307 # +failover-state-reconf-slaves master mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:24.394 * +slave-reconf-sent slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:25.322 * +slave-reconf-inprog slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:25.323 * +slave-reconf-done slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:25.399 # -odown master mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:25.399 # +failover-end master mymaster 192.168.2.104 6379

3098:X 27 Nov 2022 12:26:25.399 # +switch-master mymaster 192.168.2.104 6379 192.168.2.139 6379

3098:X 27 Nov 2022 12:26:25.400 * +slave slave 192.168.2.166:6379 192.168.2.166 6379 @ mymaster 192.168.2.139 6379

3098:X 27 Nov 2022 12:26:25.400 * +slave slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379

3098:X 27 Nov 2022 12:26:25.403 * Sentinel new configuration saved on disk

3098:X 27 Nov 2022 12:26:30.447 # +sdown slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379

3098:X 27 Nov 2022 12:29:48.267 # -sdown slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379

3098:X 27 Nov 2022 12:29:58.242 * +convert-to-slave slave 192.168.2.104:6379 192.168.2.104 6379 @ mymaster 192.168.2.139 6379</strong>

这时候再看master已经变成了redis3


redis1@redis1:~$ redis-cli -p 5000
127.0.0.1:5000> SENTINEL get-master-addr-by-name mymaster
1) "192.168.2.139"
2) "6379"

redis1@redis1:~$ redis-cli -p 5000

127.0.0.1:5000> SENTINEL get-master-addr-by-name mymaster

1) "192.168.2.139"

2) "6379"

去redis3改点数据，去redis2看变不变


redis1@redis1:~$ redis-cli -h 192.168.2.139 -p 6379
192.168.2.139:6379> get test
"1"
192.168.2.139:6379> set test 2
OK
192.168.2.139:6379> get test
"2"
192.168.2.139:6379>
redis1@redis1:~$ redis-cli -h 192.168.2.166 -p 6379
192.168.2.166:6379> get test
"2"
192.168.2.166:6379>

redis1@redis1:~$ redis-cli -h 192.168.2.139 -p 6379

192.168.2.139:6379> get test

"1"

192.168.2.139:6379> set test 2

192.168.2.139:6379> get test

"2"

192.168.2.139:6379>

redis1@redis1:~$ redis-cli -h 192.168.2.166 -p 6379

192.168.2.166:6379> get test

"2"

192.168.2.166:6379>

显然redis3改的值可以从redis2读到，说明复制正常，继续尝试恢复redis1看看能不能读到test=2


redis1@redis1:~$ redis-cli -p 6379
127.0.0.1:6379> get test
"2"
127.0.0.1:6379>

redis1@redis1:~$ redis-cli -p 6379

127.0.0.1:6379> get test

"2"

127.0.0.1:6379>

也可以读到，高可用集群搭建完成

附用到的命令


https://mirrors.tuna.tsinghua.edu.cn

redis1
192.168.2.104
ssh redis1@192.168.2.104

redis2
192.168.2.166
ssh redis2@192.168.2.166

redis3
192.168.2.139
ssh redis3@192.168.2.139

6379

sudo vim /etc/redis/redis.conf
#config all nodes
bind * -::1
protected-mode no

#only in redis2 and redis3
replicaof 192.168.2.104 6379

sudo service redis-server restart


vim sentinel.conf
port 5000 
sentinel monitor mymaster 192.168.2.104 6379 2 
sentinel down-after-milliseconds mymaster 5000 
sentinel failover-timeout mymaster 60000 
sentinel parallel-syncs mymaster 1

redis-sentinel sentinel.conf
redis-cli -p 5000
redis-cli -h 192.168.2.166 -p 5000
redis-cli -h 192.168.2.139 -p 5000

SENTINEL master mymaster 
SENTINEL get-master-addr-by-name mymaster 
SENTINEL replicas mymaster 
SENTINEL sentinels mymaster

redis-cli -p 6379
redis-cli -h 192.168.2.166 -p 6379
redis-cli -h 192.168.2.139 -p 6379

https://mirrors.tuna.tsinghua.edu.cn

redis1

192.168.2.104

ssh redis1@192.168.2.104

redis2

192.168.2.166

ssh redis2@192.168.2.166

redis3

192.168.2.139

ssh redis3@192.168.2.139

6379

sudo vim /etc/redis/redis.conf

#config all nodes

bind * -::1

protected-mode no

#only in redis2 and redis3

replicaof 192.168.2.104 6379

sudo service redis-server restart

vim sentinel.conf

port 5000

sentinel monitor mymaster 192.168.2.104 6379 2

sentinel down-after-milliseconds mymaster 5000

sentinel failover-timeout mymaster 60000

sentinel parallel-syncs mymaster 1

redis-sentinel sentinel.conf

redis-cli -p 5000

redis-cli -h 192.168.2.166 -p 5000

redis-cli -h 192.168.2.139 -p 5000

SENTINEL master mymaster

SENTINEL get-master-addr-by-name mymaster

SENTINEL replicas mymaster

SENTINEL sentinels mymaster

redis-cli -p 6379

redis-cli -h 192.168.2.166 -p 6379

redis-cli -h 192.168.2.139 -p 6379

参考

https://redis.io/docs/

https://redis.io/docs/getting-started/installation/install-redis-on-linux/

https://redis.io/docs/management/replication/

https://redis.io/docs/management/sentinel/