docker搭建mysql主主复制

其他 2019-04-03 09:21:01 阅读次数: 0
版权声明：转载请注明出处 https://blog.csdn.net/qq_18769269/article/details/88195377

1.硬件环境

ubuntu-16.04

docker-17.09

mysql-5.7.25

2.拉取MySQL的docker镜像

在每台服务器上执行以下命令，拉取MySQL镜像

root@server05:/home/topcom# docker pull mysql:5.7.25
5.7.25: Pulling from library/mysql
6ae821421a7d: Pull complete 
a9e976e3aa6d: Pull complete 
e3735e44a020: Pull complete 
bfd564e9483f: Pull complete 
df705f26e488: Pull complete 
0c5547f73d62: Pull complete 
f437382cf8a1: Pull complete 
4f22805bb6d6: Pull complete 
394f0f652697: Pull complete 
fb068b9b9d1f: Pull complete 
fdfc96ad0937: Pull complete 
Digest: sha256:8c15b2612051244d0a2b6ceb6f9bf82ddc0e909555c1067c098e5f935e2751a7
Status: Downloaded newer image for mysql:5.7.25

3.启动MySQL容器

master:

root@server04:/home/topcom# docker run --name MysqlMaster \
--volume /etc/localtime:/etc/localtime \
--restart=always \
-p 20139:3306 \
-h MysqlMaster \
-v mysql_data_MysqlMaster:/var/lib/mysql \
-v mysql_conf_MysqlMaster:/etc/mysql/ \
-e MYSQL_ROOT_PASSWORD=topcom123 -d mysql:5.7.25
dd3241aaab6ddda29ceb455c4b49f2fff0e7c05a3739416935fd0f2b6ef4f7db

slave:

root@server05:/home/topcom# docker run --name MysqlSlave  \
--volume /etc/localtime:/etc/localtime \
--restart=always \
-p 20139:3306 \
-h MysqlServer \
-v mysql_data_MysqlSlave:/var/lib/mysql \
-v mysql_conf_MysqlSlave:/etc/mysql/ \
-e MYSQL_ROOT_PASSWORD=topcom123 -d mysql:5.7.25
e231073ad24a7de4ff0925a1604f91923998827bf56e39e7be1a32c101184775

4.配置master节点

  1. 在master上的my.cnf配置：
root@server04:/home/topcom# vim /data/docker/volumes/mysql_conf_MysqlMaster/_data/mysql.conf.d/mysqld.cnf 
  
# Copyright (c) 2014, 2016, 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
#log-error      = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address   = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

#开启MySQL主主复制
server-id = 1
log-bin = mysql-bin
binlog-ignore-db = mysql,information_schema
sync_binlog = 1
binlog_checksum = none
binlog_format = mixed
auto-increment-increment = 2
auto-increment-offset = 1
slave-skip-errors = all
  1. 退出保存，重启MySQL服务
root@server04:/home/topcom# docker restart MysqlMaster
MysqlMaster
root@server04:/home/topcom#
  1. 数据同步授权

    防火墙开启20139端口，要确保对方机器能使用下面权限连接到本机mysql
root@server04:/home/topcom# docker exec -it MysqlMaster bash
root@MysqlMaster:/# mysql -uroot -ptopcom123
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 4
Server version: 5.7.25-log 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> GRANT REPLICATION SLAVE,reload,super ON *.* to 'topcom'@'%' identified by 'topcom123';
FLUSH PRIVILEGES;Query OK, 0 rows affected, 1 warning (0.08 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)

mysql>

最好将库锁住，仅仅允许读，以保证数据一致性；待主主同步环境部署后再解锁；锁住后，就不能往表里写数据，但是重启mysql服务后就会自动解锁！

mysql>FLUSH TABLES WITH READ LOCK; //注意该参数设置后，如果自己同步对方数据，同步前一定要记得先解锁！
Query OK, 0 rows affected (0.01 sec)

mysql>show master status;
+------------------+----------+--------------+--------------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB         | Executed_Gtid_Set |
+------------------+----------+--------------+--------------------------+-------------------+
| mysql-bin.000001 |      596 |              | mysql,information_schema |                   |
+------------------+----------+--------------+--------------------------+-------------------+
1 row in set (0.00 sec)

5.配置slave节点

  1. 在slave上的my.cnf配置：
root@server05:/home/topcom# vim /data/docker/volumes/mysql_conf_MysqlSlave/_data/mysql.conf.d/mysqld.cnf                
# Copyright (c) 2014, 2016, 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
#log-error      = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address   = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

#开启slave主主复制
server-id = 2
log-bin = mysql-bin
binlog-ignore-db = mysql,information_schema
sync_binlog = 1
binlog_checksum = none
binlog_format = mixed
auto-increment-increment = 2
auto-increment-offset = 2
slave-skip-errors = all
  1. 退出保存，重启MySQL服务
root@server05:/home/topcom# docker restart MysqlSlave
MysqlSlave
root@server05:/home/topcom#
  1. 数据同步授权

    防火墙开启20139端口，要确保对方机器能使用下面权限连接到本机mysql,
    同理，slave也要授权给master机器远程同步数据的权限
root@server05:/home/topcom# docker exec -it MysqlSlave bash
root@MysqlServer:/# mysql -uroot -ptopcom123 
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 3
Server version: 5.7.25-log 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> GRANT REPLICATION SLAVE,reload,super ON *.* to 'topcom'@'%' identified by 'topcom123';
Query OK, 0 rows affected, 1 warning (0.46 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.02 sec)

mysql> FLUSH TABLES WITH READ LOCK;
Query OK, 0 rows affected (0.00 sec)

mysql> show master status;
+------------------+----------+--------------+--------------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB         | Executed_Gtid_Set |
+------------------+----------+--------------+--------------------------+-------------------+
| mysql-bin.000001 |      596 |              | mysql,information_schema |                   |
+------------------+----------+--------------+--------------------------+-------------------+
1 row in set (0.00 sec)

5.执行主从同步操作

先在slave数据库上做同步master的设置。（确保slave上要同步的数据，提前在master上存在。最好双方数据保持一致）

  1. 在slave服务器上执行以下操作
root@server05:/home/topcom# docker exec -it MysqlSlave bash
root@MysqlServer:/# mysql -uroot -ptopcom123 

mysql> unlock tables; 
Query OK, 0 rows affected (0.00 sec)

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> change master to master_host='192.168.1.14',master_user='topcom',master_password='topcom123',master_log_file='mysql-bin.000001',master_log_pos=0,master_port=20139;
Query OK, 0 rows affected, 2 warnings (0.31 sec)

mysql> start slave;
Query OK, 0 rows affected (0.09 sec)

mysql> show slave status \G; 
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.14
                  Master_User: topcom
                  Master_Port: 20139
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 596
               Relay_Log_File: MysqlServer-relay-bin.000002
                Relay_Log_Pos: 801
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes #这个显示成这样是正确的
            Slave_SQL_Running: Yes #这个显示成这样是正确的
              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: 596
              Relay_Log_Space: 1006
              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: d48b511b-340f-11e9-bf4b-0242ac110008
             Master_Info_File: /var/lib/mysql/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: 
1 row in set (0.00 sec)

这样就实现了slave－>master的同步环境。

  1. 在master服务器上执行以下操作

    再在master数据库上做同步slave的设置。（确保slave上要同步的数据，提前在master上存在。最好双方数据保持一致）
mysql -uroot -ptopcom123
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 5
Server version: 5.7.25-log 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> unlock tables;
Query OK, 0 rows affected (0.00 sec)

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> change master to master_host='192.168.1.15',master_user='topcom',master_password='topcom123',master_log_file='mysql-bin.000001',master_log_pos=0,master_port=20139;
Query OK, 0 rows affected, 2 warnings (0.10 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: 192.168.1.15
                  Master_User: topcom
                  Master_Port: 20139
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 596
               Relay_Log_File: MysqlMaster-relay-bin.000002
                Relay_Log_Pos: 801
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes #这个显示成这样是正确的
            Slave_SQL_Running: Yes #这个显示成这样是正确的
              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: 596
              Relay_Log_Space: 1006
              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: 2
                  Master_UUID: e2ae948b-3410-11e9-93fc-0242ac110007
             Master_Info_File: /var/lib/mysql/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: 
1 row in set (0.00 sec)

这样就实现了master－>slave的同步环境。至此，主主双向同步环境已经实现！

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