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집  >  기사  >  데이터 베이스  >  MySQL 그룹 복제의 RECOVERING 상태에 대한 심층적인 이해

MySQL 그룹 복제의 RECOVERING 상태에 대한 심층적인 이해

黄舟
黄舟원래의
2017-03-22 13:25:253047검색


db3의 그룹 복제 멤버가 다운되었습니다. 복구한 후 서버를 시작한 다음 mysql 인스턴스를 시작하세요. 상태를 확인하면 아래와 같이 RECOVERING으로 변경됩니다. 

mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| CHANNEL_NAME  | MEMBER_ID  | MEMBER_HOST          | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| group_replication_applier | 3381d155-d7d1-11e6-94f7-b8ca3af6e36c | hch_test_dbm2_121_71 |   3317 | ONLINE       |
| group_replication_applier | 664b9ce9-d7de-11e6-9e8c-18a99b763071 | hch_test_web_1_24  |        3317 | ONLINE     |
| group_replication_applier | 84dba8ff-d7d2-11e6-aa9a-18a99b76310d | bpe_service      |     3317 | RECOVERING   |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
3 rows in set (0.00 sec)


mysql>

이 상태는 sendary의 mongodb 상태, 방금 등장한 새로운 MySQL 그룹 복제 기술에 대해 이런 상황이 발생하면 어떻게 해야 합니까?

mongodb의 이 모드에서 보조 데이터베이스는 일반적으로 기본 데이터베이스의 데이터를 복사하므로 우리는 이 아이디어를 따르고 db2의 데이터 디렉터리를 살펴보면

relay-bin 복구 로그는 아래와 같이 애플리케이션에서 실행됩니다. 릴레이 로그 패키지는 

-rw-r----- 1 mysql mysql  383 1月  17 16:08 bpe_service-relay-bin-group_replication_applier.000019
-rw-r----- 1 mysql mysql  502 1月  17 16:11 bpe_service-relay-bin-group_replication_applier.000020
-rw-r----- 1 mysql mysql  502 1月  17 16:23 bpe_service-relay-bin-group_replication_applier.000021
-rw-r----- 1 mysql mysql  421 1月  17 16:23 bpe_service-relay-bin-group_replication_applier.000022
-rw-r----- 1 mysql mysql  228 1月  17 16:23 bpe_service-relay-bin-group_replication_applier.index
-rw-r----- 1 mysql mysql  312 1月  17 16:24 bpe_service-relay-bin-group_replication_recovery.000007
-rw-r----- 1 mysql mysql 1.1G 1月  17 16:24 bpe_service-relay-bin-group_replication_recovery.000008
-rw-r----- 1 mysql mysql  391 1月  17 16:24 bpe_service-relay-bin-group_replication_recovery.000009
-rw-r----- 1 mysql mysql  312 1月  17 16:24 bpe_service-relay-bin-group_replication_recovery.000010
-rw-r----- 1 mysql mysql 1.1G 1月  17 16:24 bpe_service-relay-bin-group_replication_recovery.000011
-rw-r----- 1 mysql mysql  391 1月  17 16:24 bpe_service-relay-bin-group_replication_recovery.000012
-rw-r----- 1 mysql mysql  312 1月  17 16:24 bpe_service-relay-bin-group_replication_recovery.000013
-rw-r----- 1 mysql mysql 1.1G 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000014
-rw-r----- 1 mysql mysql  391 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000015
-rw-r----- 1 mysql mysql  312 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000016
-rw-r----- 1 mysql mysql 1.1G 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000017
-rw-r----- 1 mysql mysql  391 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000018
-rw-r----- 1 mysql mysql  312 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000019
-rw-r----- 1 mysql mysql 1.1G 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000020
-rw-r----- 1 mysql mysql  391 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000021
-rw-r----- 1 mysql mysql  312 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000022
-rw-r----- 1 mysql mysql 1.1G 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000023
-rw-r----- 1 mysql mysql  391 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000024
-rw-r----- 1 mysql mysql  312 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.000025
-rw-r----- 1 mysql mysql 181M 1月  17 16:26 bpe_service-relay-bin-group_replication_recovery.000026
-rw-r----- 1 mysql mysql 1.2K 1月  17 16:25 bpe_service-relay-bin-group_replication_recovery.index
drwxr-x--- 2 mysql mysql 4.0K 1月  17 14:11 business_db

를 기록합니다. 그런 다음 mysql 창에서 여러 스레드를 볼 수 있으며 그 중 하나는 다음과 같습니다.

릴레이 로그에서 이벤트를 읽는 중 스레드는 릴레이 로그가 적용되고 있음을 의미합니다. 

mysql> show full processlist;
+----+-------------+-----------+------+---------+------+--------------------------------------------------------+-----------------------+
| Id | User        | Host      | db   | Command | Time | State    | Info                 |
+----+-------------+-----------+------+---------+------+--------------------------------------------------------+-----------------------+
| 28 | system user |           | NULL | Connect |  701 | Suspending    | NULL                  |
| 31 | system user |           | NULL | Connect |  701 | Slave has read all relay log; waiting for more updates | NULL  |
| 35 | system user |           | NULL | Connect |  699 | Waiting for master to send event  | NULL    |
| 36 | system user |           | NULL | Connect | 4519 | Reading event from the relay log   | NULL  |
| 38 | root        | localhost | NULL | Query   |    0 | starting   | show full processlist |
+----+-------------+-----------+------+---------+------+--------------------------------------------------------+-----------------------+
5 rows in set (0.00 sec)


mysql>

잠시 후 데이터 동기화가 완료된 후 bpe_service가 RECOVERING에서 ONLINE 상태로 변경됩니다. . 이는 데이터가 동기화되었음을 추가로 확인합니다. 

mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| CHANNEL_NAME              | MEMBER_ID   | MEMBER_HOST          | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| group_replication_applier | 3381d155-d7d1-11e6-94f7-b8ca3af6e36c | hch_test_dbm2_121_71 |        3317 | ONLINE       |
| group_replication_applier | 664b9ce9-d7de-11e6-9e8c-18a99b763071 | hch_test_web_1_24    |        3317 | ONLINE       |
| group_replication_applier | 84dba8ff-d7d2-11e6-aa9a-18a99b76310d | bpe_service          |        3317 | ONLINE       |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
3 rows in set (0.00 sec)


mysql>

가서 백그라운드 오류 로그를 확인하세요.

CHANGE MASTER TO FOR CHANNEL 'group_replication_applier' 실행'을 수행하면 값이 얻어지지 않습니다. 나중에 동기화가 완료되면 그룹 복제 구성원에 가입하라는 명령 

“CHANGE MASTER TO FOR CHANNEL 'group_replication_recovery' executed'.
 Previous state master_host='hch_test_web_1_24', master_port= 3317, master_log_file='', 
 master_log_pos= 4, master_bind=&#39;&#39;. New state master_host=&#39;<NULL>&#39;, master_port= 0, master_log_file=&#39;&#39;, master_log_pos= 4, master_bind=&#39;&#39;”，

이 실행됩니다. 실행이 완료되면 최종적으로 "'이 서버는 내에서 온라인으로 선언되었습니다. 복제 그룹''이 그룹 구성원에 추가되어 변경되었습니다. 실시간 ONLINE 상태가 되었습니다: 

2017-01-17T08:23:15.710146Z 4 [Note] Plugin group_replication reported: &#39;auto_increment_increment is reset to 1&#39;
2017-01-17T08:23:15.710200Z 4 [Note] Plugin group_replication reported: &#39;auto_increment_offset is reset to 1&#39;
2017-01-17T08:23:15.710401Z 20 [Note] Error reading relay log event for channel &#39;group_replication_applier&#39;: slave SQL thread was killed
2017-01-17T08:23:15.711212Z 17 [Note] Plugin group_replication reported: &#39;The group replication applier thread was killed&#39;
2017-01-17T08:23:42.141239Z 4 [Note] Plugin group_replication reported: &#39;Group communication SSL configuration: group_replication_ssl_mode: "DISABLED"&#39;
2017-01-17T08:23:42.141451Z 4 [Note] Plugin group_replication reported: &#39;[GCS] Added automatically IP ranges 127.0.0.1/8,192.168.121.111/23 to the whitelist&#39;
2017-01-17T08:23:42.141990Z 4 [Note] Plugin group_replication reported: &#39;[GCS] Translated &#39;db2&#39; to 192.168.121.111&#39;
2017-01-17T08:23:42.142174Z 4 [Note] Plugin group_replication reported: &#39;[GCS] SSL was not enabled&#39;
2017-01-17T08:23:42.142220Z 4 [Note] Plugin group_replication reported: &#39;Initialized group communication with configuration: 
group_replication_group_name: "e4668cea-d7ca-11e6-86b5-18a99b76310d"; group_replication_local_address: "db2:24902"; 
group_replication_group_seeds: "db1:24901,db2:24902,db3:24903"; group_replication_bootstrap_group: false; 
group_replication_poll_spin_loops: 0; group_replication_compression_threshold: 1000000; group_replication_ip_whitelist: "AUTOMATIC"&#39;
2017-01-17T08:23:42.142936Z 28 [Note] &#39;CHANGE MASTER TO FOR CHANNEL &#39;group_replication_applier&#39; executed&#39;. 
Previous state master_host=&#39;<NULL>&#39;, master_port= 0, master_log_file=&#39;&#39;, master_log_pos= 4, master_bind=&#39;&#39;. 
New state master_host=&#39;<NULL>&#39;, master_port= 0, master_log_file=&#39;&#39;, master_log_pos= 4, master_bind=&#39;&#39;.

-- #（1）尝试启动默认的组复制，结果信息不对称，启动失败，然后开始初始化Group Replication
2017-01-17T08:23:42.166956Z 31 [Note] Slave SQL thread for channel &#39;group_replication_applier&#39; initialized, 
starting replication in log &#39;FIRST&#39; at position 0, relay log &#39;./bpe_service-relay-bin-group_replication_applier.000019&#39; position: 4
2017-01-17T08:23:42.166960Z 4 [Note] Plugin group_replication reported: &#39;Group Replication applier module successfully initialized!&#39;
2017-01-17T08:23:42.167064Z 4 [Note] Plugin group_replication reported: &#39;auto_increment_increment is set to 7&#39;
2017-01-17T08:23:42.167079Z 4 [Note] Plugin group_replication reported: &#39;auto_increment_offset is set to 12002&#39;
2017-01-17T08:23:42.167219Z 0 [Note] Plugin group_replication reported: &#39;state 4257 action xa_init&#39;
2017-01-17T08:23:42.167292Z 0 [Note] Plugin group_replication reported: &#39;Successfully bound to 0.0.0.0:24902 (socket=49).&#39;
2017-01-17T08:23:42.167341Z 0 [Note] Plugin group_replication reported: &#39;Successfully set listen backlog to 32 (socket=49)!&#39;
2017-01-17T08:23:42.167357Z 0 [Note] Plugin group_replication reported: &#39;Successfully unblocked socket (socket=49)!&#39;
2017-01-17T08:23:42.167400Z 0 [Note] Plugin group_replication reported: &#39;connecting to db2 24902&#39;
2017-01-17T08:23:42.167585Z 0 [Note] Plugin group_replication reported: &#39;Ready to accept incoming connections on 0.0.0.0:24902 (socket=49)!&#39;
2017-01-17T08:23:42.174427Z 0 [Note] Plugin group_replication reported: &#39;client connected to db2 24902 fd 50&#39;
2017-01-17T08:23:42.174807Z 0 [Note] Plugin group_replication reported: &#39;connecting to db2 24902&#39;
2017-01-17T08:23:42.175008Z 0 [Note] Plugin group_replication reported: &#39;client connected to db2 24902 fd 63&#39;
2017-01-17T08:23:42.175234Z 0 [Note] Plugin group_replication reported: &#39;connecting to db2 24902&#39;
2017-01-17T08:23:42.175411Z 0 [Note] Plugin group_replication reported: &#39;client connected to db2 24902 fd 65&#39;
2017-01-17T08:23:42.175614Z 0 [Note] Plugin group_replication reported: &#39;connecting to db2 24902&#39;
2017-01-17T08:23:42.175799Z 0 [Note] Plugin group_replication reported: &#39;client connected to db2 24902 fd 67&#39;
2017-01-17T08:23:42.176006Z 0 [Note] Plugin group_replication reported: &#39;connecting to db2 24902&#39;
2017-01-17T08:23:42.176176Z 0 [Note] Plugin group_replication reported: &#39;client connected to db2 24902 fd 69&#39;
2017-01-17T08:23:42.176377Z 0 [Note] Plugin group_replication reported: &#39;connecting to db2 24902&#39;
2017-01-17T08:23:42.176563Z 0 [Note] Plugin group_replication reported: &#39;client connected to db2 24902 fd 71&#39;
2017-01-17T08:23:42.176876Z 0 [Note] Plugin group_replication reported: &#39;connecting to db1 24901&#39;
2017-01-17T08:23:42.177312Z 0 [Note] Plugin group_replication reported: &#39;client connected to db1 24901 fd 73&#39;
2017-01-17T08:23:43.463474Z 0 [Note] Plugin group_replication reported: &#39;state 4257 action xa_snapshot&#39;
2017-01-17T08:23:43.463969Z 0 [Note] Plugin group_replication reported: &#39;new state x_recover&#39;
2017-01-17T08:23:43.464000Z 0 [Note] Plugin group_replication reported: &#39;state 4277 action xa_complete&#39;
2017-01-17T08:23:43.464275Z 0 [Note] Plugin group_replication reported: &#39;new state x_run&#39;
2017-01-17T08:23:44.619112Z 0 [Note] Plugin group_replication reported: &#39;Starting group replication recovery with view_id 14844510167669342:17&#39; 

--#（2） 开始进行组内数据recovery
2017-01-17T08:23:44.619451Z 34 [Note] Plugin group_replication reported: &#39;Establishing group recovery connection with a possible donor. Attempt 1/10&#39;
2017-01-17T08:23:44.624181Z 34 [Note] &#39;CHANGE MASTER TO FOR CHANNEL &#39;group_replication_recovery&#39; executed&#39;. Previous state master_host=&#39;<NULL>&#39;, 
master_port= 0, master_log_file=&#39;&#39;, master_log_pos= 4, master_bind=&#39;&#39;. New state master_host=&#39;hch_test_web_1_24&#39;, master_port= 3317, 
master_log_file=&#39;&#39;, master_log_pos= 4, master_bind=&#39;&#39;.
2017-01-17T08:23:44.628853Z 34 [Note] Plugin group_replication reported: &#39;Establishing connection to a group replication
 recovery donor 664b9ce9-d7de-11e6-9e8c-18a99b763071 at hch_test_web_1_24 port: 3317.&#39;
2017-01-17T08:23:44.629156Z 35 [Warning] Storing MySQL user name or password information in the master info repository is not secure and
 is therefore not recommended. Please consider using the USER and PASSWORD connection options for START SLAVE; see the &#39;START SLAVE Syntax&#39;
  in the MySQL Manual for more information.
2017-01-17T08:23:44.635870Z 36 [Note] Slave SQL thread for channel &#39;group_replication_recovery&#39; initialized, starting
 replication in log &#39;FIRST&#39; at position 0, relay log &#39;./bpe_service-relay-bin-group_replication_recovery.000001&#39; position: 4
2017-01-17T08:23:44.681897Z 35 [Note] Slave I/O thread for channel &#39;group_replication_recovery&#39;: 
connected to master &#39;repl@hch_test_web_1_24:3317&#39;,replication started in log &#39;FIRST&#39; at position 4
2017-01-17T08:43:34.219952Z 34 [Note] Plugin group_replication reported: &#39;Terminating existing group replication donor connection and 
purging the corresponding logs.&#39;
2017-01-17T08:43:34.220609Z 36 [Note] Slave SQL thread for channel &#39;group_replication_recovery&#39; exiting, 
replication stopped in log &#39;binlog.000042&#39; at position 185511578
2017-01-17T08:43:34.226869Z 35 [Note] Slave I/O thread killed while reading event for channel &#39;group_replication_recovery&#39;
2017-01-17T08:43:34.226886Z 35 [Note] Slave I/O thread exiting for channel &#39;group_replication_recovery&#39;, read up to log &#39;binlog.000042&#39;, position 185511578
2017-01-17T08:43:34.269973Z 34 [Note] &#39;CHANGE MASTER TO FOR CHANNEL &#39;group_replication_recovery&#39; executed&#39;. 
Previous state master_host=&#39;hch_test_web_1_24&#39;, master_port= 3317, master_log_file=&#39;&#39;,
 master_log_pos= 4, master_bind=&#39;&#39;. New state master_host=&#39;<NULL>&#39;, master_port= 0, master_log_file=&#39;&#39;, master_log_pos= 4, master_bind=&#39;&#39;.

-- # （3）已经数据恢复完成，加入组，成为组成员
2017-01-17T08:43:34.290920Z 0 [Note] Plugin group_replication reported: &#39;This server was declared online within the replication group&#39;

요약: mysql 그룹 복제 사용에는 mongodb와 같은 몇 가지 개념이 있습니다. 샤딩과 1차-2차 아이디어를 참고할 수 있어 이해가 더 쉽습니다.

위 내용은 MySQL 그룹 복제의 RECOVERING 상태에 대한 심층적인 이해의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!

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