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怎么解決mysqlMGR無(wú)法連接主節(jié)點(diǎn)的問(wèn)題-創(chuàng)新互聯(lián)

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1.現(xiàn)象

2020-07-15T16:36:24.238903+08:00 126 [ERROR] [MY-010584] [Repl] Slave I/O for channel 
'group_replication_recovery': error connecting to master 'repl@smdw:12000' 
- retry-time: 60 retries: 1 message: Authentication plugin 'caching_sha2_password' 
reported error: Authentication requires secure connection. Error_code: MY-002061
2020-07-15T16:36:24.245949+08:00 71 [ERROR] [MY-011582] [Repl] Plugin group_replication reported: 
'There was an error when connecting to the donor server. 
Please check that group_replication_recovery channel credentials and all MEMBER_HOST 
column values of performance_schema.replication_group_members table are correct and DNS resolvable.'
2020-07-15T16:36:24.246011+08:00 71 [ERROR] [MY-011583] [Repl] Plugin group_replication reported: 'For details please check performance_schema.replication_connection_status table and error log messages of Slave I/O for channel group_replication_recovery.'
2020-07-15T16:36:24.246227+08:00 71 [ERROR] [MY-011574] [Repl] Plugin group_replication reported: 'Maximum number of retries when trying to connect to a donor reached. Aborting group replication incremental recovery.'
2020-07-15T16:36:24.246332+08:00 71 [ERROR] [MY-011620] [Repl] Plugin group_replication reported: 'Fatal error during the incremental recovery process of Group Replication. The server will leave the group.'
2020-07-15T16:36:24.246648+08:00 71 [ERROR] [MY-011712] [Repl] Plugin group_replication reported: 'The server was automatically set into read only mode after an error was detected.'

2.排查

mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | b2d6c335-c4b1-11ea-b3a6-3868dd209ff0 | mdw         |       12000 | OFFLINE      |             |                |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
1 row in set (0.00 sec)
mysql> select * from performance_schema.replication_connection_status\G;
*************************** 1. row ***************************
                                      CHANNEL_NAME: group_replication_applier
                                        GROUP_NAME: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa
                                       SOURCE_UUID: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa
                                         THREAD_ID: NULL
                                     SERVICE_STATE: OFF
                         COUNT_RECEIVED_HEARTBEATS: 0
                          LAST_HEARTBEAT_TIMESTAMP: 0000-00-00 00:00:00.000000
                          RECEIVED_TRANSACTION_SET: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-26,
b2d6c335-c4b1-11ea-b3a6-3868dd209ff0:1-143778
                                 LAST_ERROR_NUMBER: 0
                                LAST_ERROR_MESSAGE: 
                              LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00.000000
                           LAST_QUEUED_TRANSACTION: 
 LAST_QUEUED_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
LAST_QUEUED_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
     LAST_QUEUED_TRANSACTION_START_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
       LAST_QUEUED_TRANSACTION_END_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
                              QUEUEING_TRANSACTION: 
    QUEUEING_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
   QUEUEING_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
        QUEUEING_TRANSACTION_START_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
*************************** 2. row ***************************
                                      CHANNEL_NAME: group_replication_recovery
                                        GROUP_NAME: 
                                       SOURCE_UUID: 
                                         THREAD_ID: NULL
                                     SERVICE_STATE: OFF
                         COUNT_RECEIVED_HEARTBEATS: 0
                          LAST_HEARTBEAT_TIMESTAMP: 0000-00-00 00:00:00.000000
                          RECEIVED_TRANSACTION_SET: 
                                 LAST_ERROR_NUMBER: 2061
                                LAST_ERROR_MESSAGE: error connecting to master 'repl@smdw:12000' - retry-time: 60 retries: 1 message: Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection.
                              LAST_ERROR_TIMESTAMP: 2020-07-15 16:36:24.238879
                           LAST_QUEUED_TRANSACTION: 
 LAST_QUEUED_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
LAST_QUEUED_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
     LAST_QUEUED_TRANSACTION_START_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
       LAST_QUEUED_TRANSACTION_END_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
                              QUEUEING_TRANSACTION: 
    QUEUEING_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
   QUEUEING_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
        QUEUEING_TRANSACTION_START_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
2 rows in set (0.00 sec)
mysql_error.log中顯示：
2020-07-15T16:36:24.237434+08:00 126 [Warning] [MY-010897] [Repl] 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 'START SLAVE Syntax' in the MySQL Manual for more information.
2020-07-15T16:36:24.238903+08:00 126 [ERROR] [MY-010584] [Repl] Slave I/O for channel 'group_replication_recovery': error connecting to master 'repl@smdw:12000' - retry-time: 60 retries: 1 message: Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection. Error_code: MY-002061
2020-07-15T16:36:24.245949+08:00 71 [ERROR] [MY-011582] [Repl] Plugin group_replication reported: 'There was an error when connecting to the donor server. Please check that group_replication_recovery channel credentials and all MEMBER_HOST column values of performance_schema.replication_group_members table are correct and DNS resolvable.'
2020-07-15T16:36:24.246011+08:00 71 [ERROR] [MY-011583] [Repl] Plugin group_replication reported: 'For details please check performance_schema.replication_connection_status table and error log messages of Slave I/O for channel group_replication_recovery.'
2020-07-15T16:36:24.246227+08:00 71 [ERROR] [MY-011574] [Repl] Plugin group_replication reported: 'Maximum number of retries when trying to connect to a donor reached. Aborting group replication incremental recovery.'
2020-07-15T16:36:24.246332+08:00 71 [ERROR] [MY-011620] [Repl] Plugin group_replication reported: 'Fatal error during the incremental recovery process of Group Replication. The server will leave the group.'
2020-07-15T16:36:24.246648+08:00 71 [ERROR] [MY-011712] [Repl] Plugin group_replication reported: 'The server was automatically set into read only mode after an error was detected.'

3.原因

萬(wàn)事不決看官方文檔，官方文檔有很明確說(shuō)明：

Replication User With The Caching SHA-2 Authentication Plugin 

By default, users created in MySQL 8 use Section 6.4.1.2, “Caching SHA-2 Pluggable Authentication”.
If the replication user you configure for distributed recovery uses the caching SHA-2 authentication
plugin, and you are not using SSL for distributed recovery connections, RSA key-pairs are used for
password exchange. For more information on RSA key-pairs, see Section 6.3.3, “Creating SSL and
RSA Certificates and Keys”.
In this situation, you can either copy the public key of the rpl_user to the joining member, or
configure the donors to provide the public key when requested. The more secure approach is to copy
the public key of the replication user account to the joining member. Then you need to configure the
group_replication_recovery_public_key_path system variable on the joining member with
the path to the public key for the replication user account.
The less secure approach is to set group_replication_recovery_get_public_key=ON
on donors so that they provide the public key of the replication user account to
joining members. There is no way to verify the identity of a server, therefore only set
group_replication_recovery_get_public_key=ON when you are sure there is no risk of
server identity being compromised, for example by a man-in-the-middle attack

可以看到，當(dāng)確認(rèn)環(huán)境安全以及沒(méi)人任何人攻擊集群時(shí)，如果不配置ssl，可以最低配置下面參數(shù)來(lái)在請(qǐng)求復(fù)制用戶密鑰時(shí)

給公鑰：

group_replication_recovery_get_public_key=ON

4.解決

mysql> start group replication;mysql> start group replication;
mysql> set global group_replication_recovery_get_public_key=on;
mysql> start group replication;

5.檢查狀態(tài)

mysql> select * from performance_schema.replication_connection_status\G;
*************************** 1. row ***************************
                                      CHANNEL_NAME: group_replication_applier
                                        GROUP_NAME: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa
                                       SOURCE_UUID: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa
                                         THREAD_ID: NULL
                                     SERVICE_STATE: ON
                         COUNT_RECEIVED_HEARTBEATS: 0
                          LAST_HEARTBEAT_TIMESTAMP: 0000-00-00 00:00:00.000000
                          RECEIVED_TRANSACTION_SET: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-26:29,
b2d6c335-c4b1-11ea-b3a6-3868dd209ff0:1-143778
                                 LAST_ERROR_NUMBER: 0
                                LAST_ERROR_MESSAGE: 
                              LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00.000000
                           LAST_QUEUED_TRANSACTION: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:29
 LAST_QUEUED_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
LAST_QUEUED_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
     LAST_QUEUED_TRANSACTION_START_QUEUE_TIMESTAMP: 2020-07-15 16:47:36.329298
       LAST_QUEUED_TRANSACTION_END_QUEUE_TIMESTAMP: 2020-07-15 16:47:36.329384
                              QUEUEING_TRANSACTION: 
    QUEUEING_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
   QUEUEING_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
        QUEUEING_TRANSACTION_START_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
*************************** 2. row ***************************
                                      CHANNEL_NAME: group_replication_recovery
                                        GROUP_NAME: 
                                       SOURCE_UUID: 
                                         THREAD_ID: NULL
                                     SERVICE_STATE: OFF
                         COUNT_RECEIVED_HEARTBEATS: 0
                          LAST_HEARTBEAT_TIMESTAMP: 0000-00-00 00:00:00.000000
                          RECEIVED_TRANSACTION_SET: 
                                 LAST_ERROR_NUMBER: 0
                                LAST_ERROR_MESSAGE: 
                              LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00.000000
                           LAST_QUEUED_TRANSACTION: 
 LAST_QUEUED_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
LAST_QUEUED_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
     LAST_QUEUED_TRANSACTION_START_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
       LAST_QUEUED_TRANSACTION_END_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
                              QUEUEING_TRANSACTION: 
    QUEUEING_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
   QUEUEING_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
        QUEUEING_TRANSACTION_START_QUEUE_TIMESTAMP: 0000-00-00 00:00:00.000000
2 rows in set (0.00 sec)
ERROR: 
No query specified
mysql> 
mysql> 
mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | 6c48e4d6-c651-11ea-a94d-3868dd209dd0 | smdw        |       12000 | ONLINE       | PRIMARY     | 8.0.20         |
| group_replication_applier | b2d6c335-c4b1-11ea-b3a6-3868dd209ff0 | mdw         |       12000 | ONLINE       | SECONDARY   | 8.0.20         |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
2 rows in set (0.00 sec)

感謝各位的閱讀，以上就是“怎么解決mysql MGR無(wú)法連接主節(jié)點(diǎn)的問(wèn)題”的內(nèi)容了，經(jīng)過(guò)本文的學(xué)習(xí)后，相信大家對(duì)怎么解決mysql MGR無(wú)法連接主節(jié)點(diǎn)的問(wèn)題這一問(wèn)題有了更深刻的體會(huì)，具體使用情況還需要大家實(shí)踐驗(yàn)證。這里是創(chuàng)新互聯(lián)，小編將為大家推送更多相關(guān)知識(shí)點(diǎn)的文章，歡迎關(guān)注！

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