Fonte: Public Account Shuai Meng's Miscellaneous Talk Shop

Informação ambiental

IP	porta	Função	informação
192.168.188.81	3316	node1	mestre
192.168.188.82	3316	node2	escravo1
192.168.188.83	3316	node3	escravo2

CentOS Linux versão 7.6.1810 (Core)
MySQL Ver 8.0.19 para linux-glibc2.12 em x86_64 (MySQL Community Server - GPL)
MySQL Router Ver 8.0.20 para Linux em x86_64 (MySQL Community - GPL)
MySQL Shell Ver 8.0.20 para Linux em x86_64 - para MySQL 8.0.20 (MySQL Community Server (GPL))

Localização do software

Implante MySQL, MySQL Router e MySQL Shell nos três nós.

Configure um ambiente de replicação e habilite a semissincronização aprimorada

Todas as configurações de nós

root@localhost [(none)]>set global super_read_only=0;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>create user 'rep'@'192.168.188.%' identified by 'rep';
Query OK, 0 rows affected (0.02 sec)

root@localhost [(none)]>grant replication slave on *.* to 'rep'@'192.168.188.%';
Query OK, 0 rows affected (0.02 sec)

root@localhost [(none)]>install plugin rpl_semi_sync_slave soname 'semisync_slave.so';
Query OK, 0 rows affected (0.01 sec)

root@localhost [(none)]>install plugin rpl_semi_sync_master soname 'semisync_master.so';
Query OK, 0 rows affected (0.02 sec)

configuração do nó mestre

root@localhost [(none)]>set global rpl_semi_sync_master_enabled=ON;
Query OK, 0 rows affected (0.01 sec)

root@localhost [(none)]>show global variables like '%semi%';
+-------------------------------------------+------------+
| Variable_name                             | Value      |
+-------------------------------------------+------------+
| rpl_semi_sync_master_enabled              | ON         |
| rpl_semi_sync_master_timeout              | 10000      |
| rpl_semi_sync_master_trace_level          | 32         |
| rpl_semi_sync_master_wait_for_slave_count | 1          |
| rpl_semi_sync_master_wait_no_slave        | ON         |
| rpl_semi_sync_master_wait_point           | AFTER_SYNC |
| rpl_semi_sync_slave_enabled               | OFF        |
| rpl_semi_sync_slave_trace_level           | 32         |
+-------------------------------------------+------------+
8 rows in set (0.00 sec)

root@localhost [(none)]>reset master;
Query OK, 0 rows affected (0.04 sec)

Configuração de nó escravo

root@localhost [(none)]>set global rpl_semi_sync_slave_enabled=ON;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>change master to master_host='192.168.188.81',master_port=3316,master_user='rep',master_password='rep',master_auto_position=1,get_master_public_key=1;
Query OK, 0 rows affected, 2 warnings (0.04 sec)

root@localhost [(none)]>reset master;
Query OK, 0 rows affected (0.04 sec)

escravo inicia a replicação

root@localhost [(none)]>start slave;
Query OK, 0 rows affected (0.03 sec)

root@localhost [(none)]>show slave status \G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.188.81
                  Master_User: rep
                  Master_Port: 3316
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 155
               Relay_Log_File: ms82-relay-bin.000002
                Relay_Log_Pos: 369
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
...
...
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
...
...
1 row in set (0.00 sec)

status semi-sincronizado da visão principal

root@localhost [(none)]>show global status like '%semi%';
+--------------------------------------------+-------+
| Variable_name                              | Value |
+--------------------------------------------+-------+
| Rpl_semi_sync_master_clients               | 2     |
| Rpl_semi_sync_master_net_avg_wait_time     | 0     |
| Rpl_semi_sync_master_net_wait_time         | 0     |
| Rpl_semi_sync_master_net_waits             | 0     |
| Rpl_semi_sync_master_no_times              | 0     |
| Rpl_semi_sync_master_no_tx                 | 0     |
| Rpl_semi_sync_master_status                | ON    |
| Rpl_semi_sync_master_timefunc_failures     | 0     |
| Rpl_semi_sync_master_tx_avg_wait_time      | 0     |
| Rpl_semi_sync_master_tx_wait_time          | 0     |
| Rpl_semi_sync_master_tx_waits              | 0     |
| Rpl_semi_sync_master_wait_pos_backtraverse | 0     |
| Rpl_semi_sync_master_wait_sessions         | 0     |
| Rpl_semi_sync_master_yes_tx                | 0     |
| Rpl_semi_sync_slave_status                 | OFF   |
+--------------------------------------------+-------+
15 rows in set (0.00 sec)

Simule negócios, use scripts para gerar transações

Construir uma mesa

root@localhost [(none)]>create database kk;
Query OK, 1 row affected (0.03 sec)
root@localhost [(none)]>use kk
Database changed
root@localhost [kk]>create table k1 ( id int auto_increment primary key , dtl varchar(20) default 'abc');
Query OK, 0 rows affected (0.05 sec)

Abra uma sessão, execute o script para gerar transações

[root@ms81 ~]# while :; do  echo "insert into kk.k1(dtl) values('duangduangduang');" | mysql -S /data/mysql/mysql3316/tmp/mysql.sock; sleep 1;done

Configure o MGR manualmente

Configurar mestre, converter mestre em MGR

Parâmetro de configuração

root@localhost [kk]>install plugin group_replication soname 'group_replication.so';
Query OK, 0 rows affected (0.03 sec)

root@localhost [kk]>set persist binlog_checksum=NONE;
Query OK, 0 rows affected (0.02 sec)

root@localhost [kk]>set persist transaction_write_set_extraction=XXHASH64;
Query OK, 0 rows affected (0.00 sec)

root@localhost [kk]>select uuid();
+--------------------------------------+
| uuid()                               |
+--------------------------------------+
| 3260d70c-966e-11ea-ba8b-0242c0a8bc51 |
+--------------------------------------+
1 row in set (0.00 sec)

root@localhost [kk]>set persist  group_replication_group_name='3260d70c-966e-11ea-ba8b-0242c0a8bc51';
Query OK, 0 rows affected (0.00 sec)

root@localhost [kk]>set persist group_replication_local_address="192.168.188.81:13306";
Query OK, 0 rows affected (0.00 sec)

root@localhost [kk]>set persist group_replication_group_seeds="192.168.188.81:13306,192.168.188.82:13306,192.168.188.83:13306";
Query OK, 0 rows affected (0.00 sec)

#也要加上这个，具体见文末
SET persist group_replication_recovery_get_public_key = 1;

root@localhost [kk]>set persist group_replication_bootstrap_group=off;
Query OK, 0 rows affected (0.00 sec)

root@localhost [kk]>set persist group_replication_start_on_boot=off;
Query OK, 0 rows affected (0.00 sec)

root@localhost [kk]>set global group_replication_bootstrap_group=on;
Query OK, 0 rows affected (0.00 sec)

root@localhost [kk]>start group_replication;
Query OK, 0 rows affected (3.36 sec)

root@localhost [kk]>set global group_replication_bootstrap_group=off;
Query OK, 0 rows affected (0.00 sec)

root@localhost [kk]>select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | 29ea8b7f-966d-11ea-937c-0242c0a8bc51 | ms81        |        3316 | ONLINE       | PRIMARY     | 8.0.19         |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
1 row in set (0.01 sec)

Neste momento, um lembrete apareceu na sessão onde ocorreu a transação

[root@ms81 ~]# while :; do  echo "insert into kk.k1(dtl) values('duangduangduang');" | mysql -S /data/mysql/mysql3316/tmp/mysql.sock; sleep 1;done
ERROR 1290 (HY000) at line 1: The MySQL server is running with the --super-read-only option so it cannot execute this statement
ERROR 1290 (HY000) at line 1: The MySQL server is running with the --super-read-only option so it cannot execute this statement
ERROR 1290 (HY000) at line 1: The MySQL server is running with the --super-read-only option so it cannot execute this statement

Vá para configurar escravo1 e converter para MGR

root@localhost [(none)]>install plugin group_replication soname 'group_replication.so';
Query OK, 0 rows affected (0.01 sec)

root@localhost [(none)]>set persist binlog_checksum=NONE;
Query OK, 0 rows affected (0.03 sec)

root@localhost [(none)]>set persist transaction_write_set_extraction=XXHASH64;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>set persist group_replication_group_name='3260d70c-966e-11ea-ba8b-0242c0a8bc51';
Query OK, 0 rows affected (0.01 sec)

root@localhost [(none)]>set persist group_replication_local_address="192.168.188.82:13306";
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>set persist group_replication_group_seeds="192.168.188.81:13306,192.168.188.82:13306,192.168.188.83:13306";
Query OK, 0 rows affected (0.00 sec)

#也要加上这个，具体见文末
SET persist group_replication_recovery_get_public_key = 1;

root@localhost [(none)]>set persist group_replication_bootstrap_group=off;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>set persist group_replication_start_on_boot=off;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>start group_replication;
ERROR 3092 (HY000): The server is not configured properly to be an active member of the group. Please see more details on error log.
root@localhost [(none)]>select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | 2cbcfaa5-966d-11ea-8707-0242c0a8bc52 | ms82        |        3316 | OFFLINE      |
    |                |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
1 row in set (0.01 sec)


root@localhost [(none)]>stop group_replication;
Query OK, 0 rows affected (4.78 sec)

root@localhost [(none)]>change master to master_user='rep',master_password='rep' for channel 'group_replication_recovery';
Query OK, 0 rows affected, 2 warnings (0.03 sec)

root@localhost [(none)]>start group_replication;
Query OK, 0 rows affected (3.88 sec)

root@localhost [(none)]>select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | 29ea8b7f-966d-11ea-937c-0242c0a8bc51 | ms81        |        3316 | ONLINE       | PRIMARY     | 8.0.19         |
| group_replication_applier | 2cbcfaa5-966d-11ea-8707-0242c0a8bc52 | ms82        |        3316 | ONLINE       | SECONDARY   | 8.0.19         |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
2 rows in set (0.00 sec)

Faça o mesmo, transforme o escravo 2

Antes da transformação, de repente pensei que a arquitetura existente havia se tornado: node1 (master) \ node2 (slave1) é MGR, node3 (slave2) é o escravo de node1 (master), então verifique os três nós atuais:

node1:
root@localhost [kk]>select count(*) from kk.k1;
+----------+
| count(*) |
+----------+
|      456 |
+----------+
1 row in set (0.00 sec)

root@localhost [kk]>show master status ;
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                                                                      |
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------------+
| mysql-bin.000002 |   154142 |              |                  | 3260d70c-966e-11ea-ba8b-0242c0a8bc51:1-350,
f78a6902-9679-11ea-b136-0242c0a8bc51:1-111 |
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

node2:
root@localhost [(none)]>select count(*) from kk.k1;
+----------+
| count(*) |
+----------+
|      456 |
+----------+
1 row in set (0.00 sec)

root@localhost [(none)]>show master status ;
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                                                                      |
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------------+
| mysql-bin.000002 |   109956 |              |                  | 3260d70c-966e-11ea-ba8b-0242c0a8bc51:1-350,
f78a6902-9679-11ea-b136-0242c0a8bc51:1-111 |
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

##注意，node2的 IO、SQL THREAD没有运行，但是 Executed_Gtid_Set 是跟进的噢
root@localhost [(none)]>show slave status\G
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: 192.168.188.81
                  Master_User: rep
                  Master_Port: 3316
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 74606
               Relay_Log_File: ms82-relay-bin.000004
                Relay_Log_Pos: 74820
        Relay_Master_Log_File: mysql-bin.000002
             Slave_IO_Running: No
            Slave_SQL_Running: No
...
...
             Master_Server_Id: 813316
                  Master_UUID: f78a6902-9679-11ea-b136-0242c0a8bc51
             Master_Info_File: mysql.slave_master_info
...
           Retrieved_Gtid_Set: 3260d70c-966e-11ea-ba8b-0242c0a8bc51:1-121,
f78a6902-9679-11ea-b136-0242c0a8bc51:1-111
            Executed_Gtid_Set: 3260d70c-966e-11ea-ba8b-0242c0a8bc51:1-350,
f78a6902-9679-11ea-b136-0242c0a8bc51:1-111
                Auto_Position: 1
...
1 row in set (0.00 sec)

node3:
root@localhost [(none)]>select count(*) from kk.k1;
+----------+
| count(*) |
+----------+
|      456 |
+----------+
1 row in set (0.00 sec)

root@localhost [(none)]>show master status ;
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                                                                      |
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------------+
| mysql-bin.000001 |   169340 |              |                  | 3260d70c-966e-11ea-ba8b-0242c0a8bc51:1-350,
f78a6902-9679-11ea-b136-0242c0a8bc51:1-111 |
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

root@localhost [(none)]>show slave status \G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.188.81
                  Master_User: rep
                  Master_Port: 3316
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 154142
               Relay_Log_File: ms83-relay-bin.000004
                Relay_Log_Pos: 154356
        Relay_Master_Log_File: mysql-bin.000002
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
...
...
                  Master_UUID: f78a6902-9679-11ea-b136-0242c0a8bc51
             Master_Info_File: mysql.slave_master_info
...
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
...
           Retrieved_Gtid_Set: 3260d70c-966e-11ea-ba8b-0242c0a8bc51:1-350,
f78a6902-9679-11ea-b136-0242c0a8bc51:1-111
            Executed_Gtid_Set: 3260d70c-966e-11ea-ba8b-0242c0a8bc51:1-350,
f78a6902-9679-11ea-b136-0242c0a8bc51:1-111
                Auto_Position: 1
...
1 row in set (0.00 sec)

Converter escravo 2

root@localhost [(none)]>install plugin group_replication soname 'group_replication.so';
Query OK, 0 rows affected (0.02 sec)

root@localhost [(none)]>set persist binlog_checksum=NONE;
Query OK, 0 rows affected (0.03 sec)

root@localhost [(none)]>set persist transaction_write_set_extraction=XXHASH64;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>set persist group_replication_group_name='3260d70c-966e-11ea-ba8b-0242c0a8bc51';
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>set persist group_replication_local_address="192.168.188.83:13306";
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>set persist group_replication_group_seeds="192.168.188.81:13306,192.168.188.82:13306,192.168.188.83:13306";
group_rQuery OK, 0 rows affected (0.00 sec)

#也要加上这个，具体见文末
SET persist group_replication_recovery_get_public_key = 1;

root@localhost [(none)]>set persist group_replication_bootstrap_group=off;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>set persist group_replication_start_on_boot=off;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>stop slave;
Query OK, 0 rows affected (0.01 sec)

root@localhost [(none)]>change master to master_user='rep',master_password='rep' for channel 'group_replication_recovery';
Query OK, 0 rows affected, 2 warnings (0.05 sec)

plicatioroot@localhost [(none)]>start group_replication;
Query OK, 0 rows affected (4.64 sec)

root@localhost [(none)]>select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | 29ea8b7f-966d-11ea-937c-0242c0a8bc51 | ms81        |        3316 | ONLINE       | PRIMARY     | 8.0.19         |
| group_replication_applier | 2cbcfaa5-966d-11ea-8707-0242c0a8bc52 | ms82        |        3316 | ONLINE       | SECONDARY   | 8.0.19         |
| group_replication_applier | 2db7ddf1-966d-11ea-a7b3-0242c0a8bc53 | ms83        |        3316 | ONLINE       | SECONDARY   | 8.0.19         |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
3 rows in set (0.00 sec)

root@localhost [(none)]>

Algumas dicas

Arquivo de parâmetro!

A maior diferença entre a conversão manual para MGR e a conversão por meio do MySQL Shell é que o último gravará automaticamente as alterações no arquivo mysqld-auto.cnf por meio de persistência de conjunto, e as operações manuais precisam prestar atenção a isso. O experimento acima não editou my.cnf. Se definir global for usado, quando os três nós MGR forem inicializados a frio novamente, os parâmetros de configuração do MGR desaparecerão e o MGR não poderá ser iniciado. A solução é:

Use set persist em vez de set global no processo de configuração para salvar a configuração persistentemente
Se você já reiniciou todos os nós e limpou a configuração temporária, você pode usar definir persist para defini-lo novamente. Após a configuração, ele pode ter efeito direto na teoria e iniciar o GR.

feitiço sha2_password

Depois de definir a configuração global, reiniciei o nó, e após definir a configuração de persistência de persistência, após iniciar o MGR, o mestre ficou online sem problemas, mas quando o nó2 se juntou ao GR, ele estava sempre RECUPERANDO
Depois de verificar o errlog, encontrei:

2020-05-15T14:35:46.869802+08:00 21 [System] [MY-010597] [Repl] 'CHANGE MASTER TO FOR CHANNEL 'group_replication_recovery' executed'. Previous state master_host='ms81', master_port= 3316, master_log_file='', master_log_pos= 4, master_bind=''. New state master_host='ms81', master_port= 3316, master_log_file='', master_log_pos= 4, master_bind=''.
2020-05-15T14:35:46.906422+08:00 28 [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.
2020-05-15T14:35:46.907876+08:00 28 [ERROR] [MY-010584] [Repl] Slave I/O for channel 'group_replication_recovery': error connecting to master 'rep@ms81:3316' - retry-time: 60 retries: 1 message: Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection. Error_code: MY-002061
2020-05-15T14:35:46.923832+08:00 21 [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.'
2020-05-15T14:35:46.923887+08:00 21 [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.'

检查 performance_schema.replication_connection_status

root@localhost [(none)]>select * from  performance_schema.replication_connection_status\G
...
...
...
*************************** 3. 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 'rep@ms81:3316' - retry-time: 60 retries: 1 message: Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection.

...
...
3 rows in set (0.01 sec)

Volte ao estado de recuperação e encontre problemas de conexão, tente aumentar o mestre de mudança:

root@localhost [(none)]>change master to master_user='rep',master_password='rep',get_master_public_key=1 for channel 'group_replication_recovery';
ERROR 3139 (HY000): CHANGE MASTER with the given parameters cannot be performed on channel 'group_replication_recovery'.

Isso é embaraçoso.

Solução temporária

[root@ms82 ~]# mysql -h 192.168.188.81 -P 3316 -urep -prep
[email protected] [(none)]>exit

[root@ms82 ~]# mysql -S /data/mysql/mysql3316/tmp/mysql.sock
root@localhost [(none)]>stop group_replication;
Query OK, 0 rows affected (4.75 sec)

root@localhost [(none)]>start group_replication;
Query OK, 0 rows affected (5.75 sec)

root@localhost [(none)]>select * from  performance_schema.replication_connection_status\G
*************************** 1. row ***************************
                                      CHANNEL_NAME:
                                        GROUP_NAME:
                                       SOURCE_UUID: 29ea8b7f-966d-11ea-937c-0242c0a8bc51
                                         THREAD_ID: NULL
                                     SERVICE_STATE: OFF
                         COUNT_RECEIVED_HEARTBEATS: 0
                          LAST_HEARTBEAT_TIMESTAMP: 0000-00-00 00:00:00.000000
                          RECEIVED_TRANSACTION_SET: 29ea8b7f-966d-11ea-937c-0242c0a8bc51:1-530,
3260d70c-966e-11ea-ba8b-0242c0a8bc51:1-343
                                 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_applier
                                        GROUP_NAME: 3260d70c-966e-11ea-ba8b-0242c0a8bc51
                                       SOURCE_UUID: 3260d70c-966e-11ea-ba8b-0242c0a8bc51
                                         THREAD_ID: NULL
                                     SERVICE_STATE: ON
                         COUNT_RECEIVED_HEARTBEATS: 0
                          LAST_HEARTBEAT_TIMESTAMP: 0000-00-00 00:00:00.000000
                          RECEIVED_TRANSACTION_SET: 29ea8b7f-966d-11ea-937c-0242c0a8bc51:1-530,
3260d70c-966e-11ea-ba8b-0242c0a8bc51:1-781:787
                                 LAST_ERROR_NUMBER: 0
                                LAST_ERROR_MESSAGE:
                              LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00.000000
                           LAST_QUEUED_TRANSACTION: 3260d70c-966e-11ea-ba8b-0242c0a8bc51:787
 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: 2020-05-15 14:38:54.721851
       LAST_QUEUED_TRANSACTION_END_QUEUE_TIMESTAMP: 2020-05-15 14:38:54.721874
                              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
*************************** 3. 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
3 rows in set (0.00 sec)

Solução de exército regular

SET GLOBAL group_replication_recovery_use_ssl = ON;

SET GLOBAL group_replication_recovery_get_public_key = 1;  #已合并到操作中

SET GLOBAL group_replication_recovery_public_key_path = 'path to RSA public key file';

Partida a frio MGR

Desligue todos os três nós

mysql > shutdown ;

Iniciar nó 1

[root@ms81 ~]# mysqld --defaults-file=/data/mysql/mysql3316/my3316.cnf  &
[root@ms81 ~]# mysql -S /data/mysql/mysql3316/tmp/mysql.sock
root@localhost [(none)]>set global group_replication_bootstrap_group=ON;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>start group_replication;
Query OK, 0 rows affected (3.16 sec)

root@localhost [(none)]>set global group_replication_bootstrap_group=OFF;
Query OK, 0 rows affected (0.00 sec)

root@localhost [(none)]>select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | f78a6902-9679-11ea-b136-0242c0a8bc51 | ms81        |        3316 | ONLINE       | PRIMARY     | 8.0.19         |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
1 rows in set (0.01 sec)

Iniciar nó 2

[root@ms82 ~]# mysqld --defaults-file=/data/mysql/mysql3316/my3316.cnf  &
[root@ms82 ~]#  mysql -S /data/mysql/mysql3316/tmp/mysql.sock
root@localhost [(none)]>start group_replication;
Query OK, 0 rows affected (3.45 sec)

root@localhost [(none)]>select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | f78a6902-9679-11ea-b136-0242c0a8bc51 | ms81        |        3316 | ONLINE       | PRIMARY     | 8.0.19         |
| group_replication_applier | faaab4c3-9679-11ea-896f-0242c0a8bc52 | ms82        |        3316 | ONLINE       | SECONDARY   | 8.0.19         |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
2 rows in set (0.00 sec)

- Da mesma forma, inicie o node3

[root@ms83 ~]# mysqld --defaults-file=/data/mysql/mysql3316/my3316.cnf  &
[root@ms83 ~]#  mysql -S /data/mysql/mysql3316/tmp/mysql.sock
root@localhost [(none)]>start group_replication;
Query OK, 0 rows affected (3.45 sec)

root@localhost [(none)]>select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | f78a6902-9679-11ea-b136-0242c0a8bc51 | ms81        |        3316 | ONLINE       | PRIMARY     | 8.0.19         |
| group_replication_applier | faaab4c3-9679-11ea-896f-0242c0a8bc52 | ms82        |        3316 | ONLINE       | SECONDARY   | 8.0.19         |
| group_replication_applier | fb358b40-9679-11ea-94cb-0242c0a8bc53 | ms83        |        3316 | ONLINE       | SECONDARY   | 8.0.19         |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
3 rows in set (0.01 sec)

O texto completo acabou.

Aproveite o MySQL 8.0 :)

A aula "MySQL Core Optimization" do professor Ye foi atualizada para o MySQL 8.0, leia o código para iniciar a jornada de prática do MySQL 8.0

Instrução em conjunto com a arquitetura de replicação mestre-escravo MySQL, conversão de arquitetura MGR (versão manual)