実践的な指導-MySQLマスタースレーブレプリケーションアーキテクチャ変換MGRアーキテクチャ（手動バージョン）

出典：パブリックアカウントShuaiMengのその他のトークショップ

環境情報

IP	ポート	役割	情報
192.168.188.81	3316	node1	主人
192.168.188.82	3316	node2	slave1
192.168.188.83	3316	node3	slave2

• CentOS Linuxリリース7.6.1810（コア）

• Linux用のMySQLVer 8.0.19-x86_64上のglibc2.12（MySQL Community Server-GPL）

• Linux onx86_64用のMySQLルーターVer8.0.20（MySQLコミュニティ-GPL）

• Linux onx86_64用のMySQLShell Ver 8.0.20-MySQL 8.0.20用（MySQL Community Server（GPL））

ソフトウェアの場所

MySQL、MySQLルーター、およびMySQLシェルを3つのノードにデプロイします。

レプリケーション環境をセットアップし、拡張された半同期を有効にします

• すべてのノード構成

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)

• マスターノードの構成

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)

• スレーブノードの構成

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)

• スレーブがレプリケーションを開始します

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)

• マスタービューの半同期ステータス

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)

ビジネスをシミュレートし、スクリプトを使用してトランザクションを生成します

• テーブルを作成する

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)

• セッションを開き、スクリプトを実行してトランザクションを生成します

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

MGRを手動で構成する

マスターを構成し、マスターをMGRに変換します

• 構成パラメーター

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)

• このとき、トランザクションが発生したセッションにリマインダーが表示されました

[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

slave1の構成に移動し、MGRに変換します

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)

同じことをして、slave2を変換します

変換する前に、既存のアーキテクチャが次のようになっていると突然思いました。node1（master）\ node2（slave1）はMGR、node3（slave2）はnode1（master）のスレーブであり、現在の3つのノードを確認します。

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)

• slave2を変換する

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)]>

いくつかのヒント

パラメータファイル！

MGRへの手動変換とMySQLShellを介した変換の最大の違いは、MySQL Shellがsetpersistを介してmysqld-auto.cnfファイルに変更を自動的に書き込むことであり、手動操作ではこれに注意する必要があります。上記の実験では、my.cnfはまったく編集されませんでした。setglobalを使用すると、3つのMGRノードが再度コールドスタートされると、MGRの構成パラメーターがなくなり、MGRを開始できなくなります。解決策は次のとおりです。

1. 構成を永続的に保存するには、構成プロセスでsetglobalではなくsetpersistを使用します

2. すでにすべてのノードを再起動して一時設定をクリアしている場合は、setpersistを使用して再度設定できます。設定後、直接有効にしてGRを起動できます。

sha2_passwordスペル

• グローバル構成を設定した後、ノードを再起動し、永続永続構成を設定しました。MGRを開始した後、マスターはスムーズにオンラインになりましたが、node2がGRに参加すると、常に回復していました。

• errlogを確認した後、次のことがわかりました。

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)

回復状態に戻り、接続の問題が発生した場合は、変更マスターを増やしてみてください。

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'.

これは恥ずかしいです。

• 一時的な解決策

[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)

• 通常の軍隊の解決策

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';

MGRコールドスタート

• 3つのノードすべてをオフにします

mysql > shutdown ;

• node1を開始します

[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)

• node2を開始します

[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)

-同様に、node3を起動します

[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)

全文は終わりました。

MySQL8.0をお楽しみください:)

---

TeacherYeの「MySQLCoreOptimization」クラスがMySQL8.0にアップグレードされました。コードをスキャンして、MySQL8.0の練習の旅を始めてください。