MySQL 5.7 MGR单主确定主节点方法

2023年 4月 29日 35.9k 0

MySQL 5.7 MGR单主确定主节点是哪个,我们可以通过成员ID来判断,然后结合read_only参数来确认。 [root@localhost ~]# mysql -uroot -p -P 3306 -h 127.0.0.1 mysql: [Warning] Using a password on the command line inter

MySQL 5.7 MGR单主确定主节点是哪个,我们可以通过成员ID来判断,然后结合read_only参数来确认。

[root@localhost ~]# mysql -uroot -p -P 3306 -h 127.0.0.1mysql: [Warning] Using a password on the command line interface can be insecure.Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 857246Server version: 5.7.26-29-log Percona Server (GPL)

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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> status--------------mysql  Ver 14.14 Distrib 5.7.26-29, for Linux (x86_64) using  EditLine wrapper

Connection id:      857246Current database:  Current user:      root@127.0.0.1SSL:            Not in useCurrent pager:      stdoutUsing outfile:      ''Using delimiter:    ;Server version:    5.7.26-29-log Percona Server (GPL)Protocol version:  10Connection:    127.0.0.1 via TCP/IPServer characterset:    utf8mb4Db    characterset:    utf8mb4Client characterset:    utf8Conn.  characterset:    utf8TCP port:      3306Uptime:        39 days 8 hours 53 min 39 sec

Threads: 4  Questions: 4989552  Slow queries: 731837  Opens: 930  Flush tables: 1  Open tables: 924  Queries per second avg: 1.466--------------

mysql> SHOW STATUS LIKE 'group_replication_primary_member';+----------------------------------+--------------------------------------+| Variable_name                    | Value                                |+----------------------------------+--------------------------------------+| group_replication_primary_member | 59d7f183-b8f6-11e9-863b-005056875165 |+----------------------------------+--------------------------------------+1 row in set (0.00 sec)

mysql> select * from performance_schema.replication_group_members;+---------------------------+--------------------------------------+-------------+-------------+--------------+| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE |+---------------------------+--------------------------------------+-------------+-------------+--------------+| group_replication_applier | 500dd0aa-b8f6-11e9-85ba-005056875a61 | 196.55.7.37 |        3306 | ONLINE      || group_replication_applier | 59d7f183-b8f6-11e9-863b-005056875165 | 196.55.7.36 |        3306 | ONLINE      || group_replication_applier | 69e1c26d-b8f6-11e9-91c1-00505687032a | 196.55.7.38 |        3306 | ONLINE      |+---------------------------+--------------------------------------+-------------+-------------+--------------+3 rows in set (0.00 sec)

mysql> show variables like '%read_only';+-----------------------+-------+| Variable_name        | Value |+-----------------------+-------+| innodb_read_only      | OFF  || read_only            | OFF  || super_read_only      | OFF  || transaction_read_only | OFF  || tx_read_only          | OFF  |+-----------------------+-------+5 rows in set (0.01 sec)

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