Mysql 主從複制搭建-極簡版

前言

自己在百度、Google一番踩坑搭建成功後，記錄一下，也希望後來人不再被這些坑到。

這裡為了友善使用 docker，不會的同學請移步相關 Docker 教程。

正文

1. 啟動 mysql

#啟動 master
docker run --name master -e MYSQL_ROOT_PASSWORD=123456 -d mysql
#啟動 slave
docker run --name slave -e MYSQL_ROOT_PASSWORD=123456 -d mysql
           

備注：--name 是指定容器名稱；-e MYSQL_ROOT_PASSWORD 是指定mysql密碼

2. 修改 mysql 配置

docker 的正确用法應該是基于mysql鏡像，建立兩個新的鏡像，這裡為了簡單，直接進入容器修改

修改 master 的 mysql 配置

docker exec -it [master容器id] bash
           

echo '[mysqld]
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
datadir         = /var/lib/mysql
secure-file-priv= NULL
symbolic-links=0
#啟用二進制日志
log-bin=mysql-bin
#設定伺服器唯一Id，這裡省事直接寫1
server-id=1
!includedir /etc/mysql/conf.d/' > /etc/mysql/my.cnf
           

備注：第二段請一口氣複制，它們是一句..

這裡因為容器内沒有裝vim是以使用這種方式，其實就是加上

log-bin=mysql-bin

和

server-id=1

這兩個配置

修改 slave 的 mysql 配置

其實一樣，隻是改個server-id

docker exec -it [slave容器id] bash
           

echo '[mysqld]
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
datadir         = /var/lib/mysql
secure-file-priv= NULL
symbolic-links=0
#啟用二進制日志
log-bin=mysql-bin
#設定伺服器唯一Id
server-id=2
!includedir /etc/mysql/conf.d/' > /etc/mysql/my.cnf
           

重新開機容器

docker restart [master容器id] [slave容器id]
           

3. 配置同步

登入 master 擷取資訊

docker exec -it [master容器id] mysql -uroot -p123456
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      155 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
           

主要記住 mysql-bin.000001 和 155 這兩個值，一個是檔案，一個是偏移量

登入 slave 設定同步

docker exec -it [slave容器id] mysql -uroot -p123456
mysql> change master to master_host='172.17.0.2',master_user='root',master_log_file='mysql-bin.000001',master_log_pos=155,master_port=3306,master_password='123456';
msql> start slave;
           

備注：這裡的 ip 是 master 的 ip，可以通過

docker inspect [容器id]|grep IPA

檢視 IP

4. 檢驗成功

通過

show slave status\G;

看到

失敗了..

Last_IO_Error: error connecting to master '[email protected]:3306' - retry-time: 60 retries: 1 message: Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection.

不安全的連接配接？

最後在 Mysql 官網發現端倪，需要先在 slave 上連接配接 master 擷取 public-key，如下

mysql --ssl-mode=DISABLED -h [masterIP] -uroot -p123456 --get-server-public-key

然後重新開機下 slave 線程

stop slave;

start slave;

檢視狀态

show slave status\G;

可以看到下面兩個yes就說明成功了

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

後記

關于最後那個連接配接不安全的錯誤，應該是 mysql8 才有的，不過具體原因還沒空去研究

附上記錄檔

################【啟動mysql】################
deepin@DeepinBook:~$ docker run --name master -e MYSQL_ROOT_PASSWORD=123456 -d mysql
6f0d597fda22325f35eef4d00356238e4058d3dc2122177fe1bdc2a9cca554b2
deepin@DeepinBook:~$ docker run --name slave -e MYSQL_ROOT_PASSWORD=123456 -d mysql
5dca640e2ceb4744a1e85402c50a0134ad981a9cc658f91058bd739c80fb22b4

################【修改mysql配置】#############
deepin@DeepinBook:~$ docker exec -it 6f bash
root@6f0d597fda22:/# cat /etc/mysql/my.cnf
# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

#
# The MySQL  Server configuration file.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

[mysqld]
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
datadir         = /var/lib/mysql
secure-file-priv= NULL
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

# Custom config should go here
!includedir /etc/mysql/conf.d/
root@6f0d597fda22:/# echo '[mysqld]
> pid-file        = /var/run/mysqld/mysqld.pid
> socket          = /var/run/mysqld/mysqld.sock
> datadir         = /var/lib/mysql
> secure-file-priv= NULL
> symbolic-links=0
> log-bin=mysql-bin
> server-id=1
> !includedir /etc/mysql/conf.d/' > /etc/mysql/my.cnf
root@6f0d597fda22:/# cat /etc/mysql/my.cnf
[mysqld]
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
datadir         = /var/lib/mysql
secure-file-priv= NULL
symbolic-links=0
log-bin=mysql-bin
server-id=1
!includedir /etc/mysql/conf.d/
root@6f0d597fda22:/# exit

deepin@DeepinBook:~$ docker exec -it 5d bash
root@5dca640e2ceb:/# echo '[mysqld]
> pid-file        = /var/run/mysqld/mysqld.pid
> socket          = /var/run/mysqld/mysqld.sock
> datadir         = /var/lib/mysql
> secure-file-priv= NULL
> symbolic-links=0
> #啟用二進制日志
> log-bin=mysql-bin
> #設定伺服器唯一Id
> server-id=2
> !includedir /etc/mysql/conf.d/' > /etc/mysql/my.cnf
root@5dca640e2ceb:/# 
root@5dca640e2ceb:/# 
root@5dca640e2ceb:/# exit
exit
deepin@DeepinBook:~$ docker restart 6f 5d
6f
5d

################【配置主從】#############
deepin@DeepinBook:~$ docker exec -it 6f mysql -uroot -p123456
mysql: [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 8
Server version: 8.0.17 MySQL Community Server - GPL

Copyright (c) 2000, 2019, 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 master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      155 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

mysql> exit
Bye
deepin@DeepinBook:~$ docker exec -it 5d mysql -uroot -p123456
mysql: [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 8
Server version: 8.0.17 MySQL Community Server - GPL

Copyright (c) 2000, 2019, 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> change master to master_host='172.17.0.2',master_user='root',master_log_file='mysql-bin.000001',master_log_pos=155,master_port=3306,master_password='123456';
Query OK, 0 rows affected, 2 warnings (0.04 sec)

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Connecting to master
                  Master_Host: 172.17.0.2
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 155
               Relay_Log_File: 5dca640e2ceb-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Connecting
            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: 155
              Relay_Log_Space: 155
              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: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 2061
                Last_IO_Error: error connecting to master '[email protected]:3306' - retry-time: 60 retries: 8 message: Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection.
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 0
                  Master_UUID: 
             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: 191008 10:43:52
     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)

ERROR: 
No query specified

mysql> exit
Bye
deepin@DeepinBook:~$ docker exec -it 5d bash
root@5dca640e2ceb:/# mysql --ssl-mode=DISABLED -h172.17.0.2 -uroot -p123456 --get-server-public-key
mysql: [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 20
Server version: 8.0.17 MySQL Community Server - GPL

Copyright (c) 2000, 2019, 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> exit
Bye
root@5dca640e2ceb:/# mysql -uroot -p123456
mysql: [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 11
Server version: 8.0.17 MySQL Community Server - GPL

Copyright (c) 2000, 2019, 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 slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Connecting to master
                  Master_Host: 172.17.0.2
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 155
               Relay_Log_File: 5dca640e2ceb-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Connecting
            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: 155
              Relay_Log_Space: 155
              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: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 2061
                Last_IO_Error: error connecting to master '[email protected]:3306' - retry-time: 60 retries: 11 message: Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection.
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 0
                  Master_UUID: 
             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: 191008 10:46:52
     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)

ERROR: 
No query specified

mysql> stop slave;
Query OK, 0 rows affected (0.01 sec)

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.17.0.2
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 155
               Relay_Log_File: 5dca640e2ceb-relay-bin.000002
                Relay_Log_Pos: 322
        Relay_Master_Log_File: mysql-bin.000001
             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: 155
              Relay_Log_Space: 537
              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: 48507a05-e9b2-11e9-ae20-0242ac110002
             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)

ERROR: 
No query specified