前提
- GCPのCompute Engine(Ubuntu)にMySQLをインストールした。
- MySQL 8.0
登場するインスタンス
mysql1 10.146.0.18
mysql2 10.146.0.20
手順
Step 1: Configure the Master Server
$ sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf
/etc/mysql/mysql.conf.d/mysqld.cnfには下記の値が記載されるようにします。
/etc/mysql/mysql.conf.d/mysqld.cnf
log_bin = /var/log/mysql/mysql-bin.log
log_bin_index =/var/log/mysql/mysql-bin.log.index
relay_log = /var/log/mysql/mysql-relay-bin
relay_log_index = /var/log/mysql/mysql-relay-bin.index
server-id = 1
tmpdir = /tmp
binlog_format = ROW
max_binlog_size = 500M
sync_binlog = 1
expire-logs-days = 7
slow_query_log
Step 2: Create Replication user on Replica database server
レプリカサーバーからリードサーバーに接続できるようにするためユーザーを作成します。
rootユーザーとして下記を実行します。
create user rpl_user@10.146.0.20 identified by 'password';
# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.21-0ubuntu0.20.04.4 (Ubuntu)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create user rpl_user@10.146.0.20 identified with mysql_native_password by 'password';
Query OK, 0 rows affected (0.01 sec)
caching_sha2_passwordプラグインではなくmysql_native_passwordプラグインを指定しています。
mysql> grant replication slave on *.* to rpl_user@10.146.0.20;
Query OK, 0 rows affected (0.01 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> show grants for rpl_user@10.146.0.20;
+------------------------------------------------------------+
| Grants for rpl_user@10.146.0.20 |
+------------------------------------------------------------+
| GRANT REPLICATION SLAVE ON *.* TO `rpl_user`@`10.146.0.20` |
+------------------------------------------------------------+
1 row in set (0.00 sec)
Step 3: Install and Configure Slave Server
$ sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf
/etc/mysql/mysql.conf.d/mysqld.cnfには下記の値が記載されるようにします。
/etc/mysql/mysql.conf.d/mysqld.cnf
log_bin = /var/log/mysql/mysql-bin.log
log_bin_index =/var/log/mysql/mysql-bin.log.index
relay_log = /var/log/mysql/mysql-relay-bin
relay_log_index = /var/log/mysql/mysql-relay-bin.index
server-id = 2
read_only = 1
tmpdir = /tmp
binlog_format = ROW
max_binlog_size = 500M
sync_binlog = 1
expire-logs-days = 7
slow_query_log = 1
$ sudo systemctl restart mysql
Step 4: Initialize Replication process
レプリカサーバーの方で下記のmysqlを実行します。
mysql> show master status\G
*************************** 1. row ***************************
File: mysql-bin.000003
Position: 156
Binlog_Do_DB:
Binlog_Ignore_DB:
Executed_Gtid_Set:
1 row in set (0.00 sec)
レプリカサーバーで下記のクエリを実行します。
CHANGE MASTER TO MASTER_HOST='10.146.0.18',
MASTER_USER='rpl_user',
MASTER_PASSWORD='password',
MASTER_LOG_FILE='mysql-bin.000003',
MASTER_LOG_POS=156;
作業ログ
# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 8.0.21-0ubuntu0.20.04.4 (Ubuntu)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
mysql> CHANGE MASTER TO MASTER_HOST='10.146.0.18',
-> MASTER_USER='rpl_user',
-> MASTER_PASSWORD='password',
-> MASTER_LOG_FILE='mysql-bin.000002',
-> MASTER_LOG_POS=156;
Query OK, 0 rows affected, 2 warnings (0.05 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
レプリカのステータスを確認します。
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.146.0.18
Master_User: rpl_user
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 156
Relay_Log_File: mysql-relay-bin.000003
Relay_Log_Pos: 371
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 156
Relay_Log_Space: 580
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: 1cbeabec-f0cc-11ea-b096-42010a920012
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set (0.00 sec)
step 5. Check
replication_dbをリードDBで作成し、レプリカDBで確認をしてみる。
root@mysql-1:/home/kuraya# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 8.0.21-0ubuntu0.20.04.4 (Ubuntu)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
mysql> CREATE DATABASE replication_db;
Query OK, 1 row affected (0.01 sec)
root@mysql-2:/home/kuraya# sudo mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 8.0.21-0ubuntu0.20.04.4 (Ubuntu)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> SHOW DATABASES;
+----------------------+
| Database |
+----------------------+
| information_schema |
| mysql |
| performance_schema |
| replication_db |
| sys |
| to*****bo_production |
+----------------------+
6 rows in set (0.01 sec)
リードで作成したDBであるreplication_dbがレプリカでも確認することができました。
（このreplication_dbはリードDBで削除しておきます。）
参考：
https://www.tecmint.com/setup-mysql-master-slave-replication-on-ubuntu/