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如何快速使用mysqlreplicate搭建MySQL主从

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简介 。

mysql-utilities工具集是一个集中了多种工具的合集,可以理解为是DBA的工具箱,本文介绍利用其中的mysqlreplicate工具来快速搭建MySQL主从环境.

HE1:192.168.1.248 slave 。

HE3:192.168.1.250 master 。

实战 。

Part1:安装mysql-utilities 。

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[root@HE1 ~]# tar xvf mysql-utilities-1.5.4.tar.gz
 
[root@HE1 ~]# cd mysql-utilities-1.5.4
 
[root@HE1 mysql-utilities-1.5.4]# python setup.py build
 
[root@HE1 mysql-utilities-1.5.4]# python setup.py install

Part2:基本使用方式 。

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[root@HE1 ~]# mysqlreplicate --help
MySQL Utilities mysqlreplicate version 1.5.4
License type: GPLv2
Usage: mysqlreplicate --master=root@localhost:3306 --slave=root@localhost:3310 --rpl-user=rpl:passwd
mysqlreplicate - establish replication with a master
Options:
  --version    show program's version number and exit
  --help    display a help message and exit
  --license    display program's license and exit
  --master=MASTER  connection information for master server in the form:
       < user >[:< password >]@<host>[:<port>][:<socket>] or
       <login-path>[:<port>][:<socket>] or <config-
       path>[<[ group ]>].
  --slave=SLAVE   connection information for slave server in the form:
       < user >[:< password >]@<host>[:<port>][:<socket>] or
       <login-path>[:<port>][:<socket>] or <config-
       path>[<[ group ]>].
  --rpl-user=RPL_USER the user and password for the replication user
       requirement, in the form: < user >[:< password >] or
       <login-path>. E.g. rpl:passwd
  -p, --pedantic  fail if storage engines differ among master and slave.
  --test-db=TEST_DB  database name to use in testing replication setup
       (optional)
  --master-log-file=MASTER_LOG_FILE
       use this master log file to initiate the slave.
  --master-log-pos=MASTER_LOG_POS
       use this position in the master log file to initiate
       the slave.
  -b, --start-from-beginning
       start replication from the first event recorded in the
       binary logging of the master. Not valid with --master-
       log-file or --master-log-pos.
  --ssl-ca=SSL_CA  The path to a file that contains a list of trusted SSL
       CAs.
  --ssl-cert=SSL_CERT The name of the SSL certificate file to use for
       establishing a secure connection .
  --ssl-key=SSL_KEY  The name of the SSL key file to use for establishing a
       secure connection .
  --ssl=SSL    Specifies if the server connection requires use of
       SSL. If an encrypted connection cannot be established,
       the connection attempt fails. By default 0 (SSL not
       required).
  -v, --verbose   control how much information is displayed. e.g., -v =
       verbose, -vv = more verbose, -vvv = debug
  -q, --quiet   turn off all messages for quiet execution.

Part3:主库准备 。

主库创建复制用户 。

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[root@HE3 ~]# mysql -uroot -p
Enter password :
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 23329
Server version: 5.7.16-log MySQL Community Server (GPL)
Copyright (c) 2000, 2016, 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 client,replication slave on *.* to 'mysync' @ '%' identified by 'MANAGER' ;
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> flush privileges ;
Query OK, 0 rows affected (0.01 sec)

Part4:一键配置 。

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从库进行配置主从执行如下命令
[root@HE1 ~]# mysqlreplicate --master=sys_admin:MANAGER@192.168.1.250:3306 --slave=sys_admin:MANAGER@192.168.1.248:3306 --rpl-user=mysync:MANAGER -b
WARNING: Using a password on the command line interface can be insecure.
# master on 192.168.1.250: ... connected.
# slave on 192.168.1.248: ... connected.
# Checking for binary logging on master...
# Setting up replication...
# ...done.

检查 。

Part1:mysqlrplcheck检查 。

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[root@HE1 ~]# mysqlrplcheck --master=sys_admin:MANAGER@192.168.1.250:3306 --slave=sys_admin:MANAGER@192.168.1.248:3306 -s
WARNING: Using a password on the command line interface can be insecure.
# master on 192.168.1.250: ... connected.
# slave on 192.168.1.248: ... connected.
Test Description              Status
---------------------------------------------------------------------------
Checking for binary logging on master        [pass]
Are there binlog exceptions?           [pass]
Replication user exists?            [pass]
Checking server_id values           [pass]
Checking server_uuid values           [pass]
Is slave connected to master?          [pass]
Check master information file          [pass]
Checking InnoDB compatibility          [pass]
Checking storage engines compatibility        [pass]
Checking lower_case_table_names settings        [pass]
Checking slave delay (seconds behind master)       [pass]
 
#
# Slave status:
#
     Slave_IO_State : Waiting for master to send event
      Master_Host : 192.168.1.250
      Master_User : mysync
      Master_Port : 3306
      Connect_Retry : 60
     Master_Log_File : mysql-bin.000003
    Read_Master_Log_Pos : 384741
     Relay_Log_File : HE1-relay-bin.000004
      Relay_Log_Pos : 384954
    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 : 384741
     Relay_Log_Space : 1743112
     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 : 1250
      Master_UUID : 1b1daad8-b501-11e6-aa21-000c29c6361d
     Master_Info_File : /data/mysql/master.info
       SQL_Delay : 0
    SQL_Remaining_Delay : None
   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 :
# ...done.

其他常用工具 。

Part1:mysqldiskusage检查数据库空间大小 。

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[root@HE1 ~]# mysqldiskusage --server=sys_admin:MANAGER@localhost
WARNING: Using a password on the command line interface can be insecure.
# Source on localhost: ... connected.
# Database totals:
+ ---------------------+--------------+
| db_name    |  total |
+ ---------------------+--------------+
| maxscale_schema  | 14,906  |
| mysql    | 14,250,013 |
| performance_schema | 818,071  |
| sys     | 500,802  |
| wms     | 925,929,868 |
+ ---------------------+--------------+
Total database disk usage = 941,513,660 bytes or 897.90 MB
#...done.

Part2:mysqlindexcheck检查冗余索引 。

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[root@HE1 ~]# mysqlindexcheck --server=sys_admin:MANAGER@localhost wms
WARNING: Using a password on the command line interface can be insecure.
# Source on localhost: ... connected.
# The following index is a duplicate or redundant for table wms.auth_user:
#
CREATE UNIQUE INDEX `index_user_name` ON `wms`.`auth_user` (`user_name`) USING BTREE
#  may be redundant or duplicate of :
CREATE INDEX `user_name` ON `wms`.`auth_user` (`user_name`, `state`) USING BTREE
# The following index is a duplicate or redundant for table wms.basic_storeage_sapce:
#
CREATE INDEX `idx_store_district_space_no` ON `wms`.`basic_storeage_sapce` (`store_id`, `district_id`, `store_space_no`) USING BTREE
#  may be redundant or duplicate of :
CREATE UNIQUE INDEX `idx_store_district_space_no_un` ON `wms`.`basic_storeage_sapce` (`store_id`, `district_id`, `store_space_no`) USING BTREE

——总结—— 。

可以看到利用mysql-utilities工具集中的mysqlreplicate来配置MySQL主从非常简单,mysqlreplicate也提供了各类参数,本文中的-b是指使复制从主二进制日志中的第一个事件开始。mysqlrplcheck 中的-s是指输出show slave status\G的内容。由于笔者的水平有限,编写时间也很仓促,文中难免会出现一些错误或者不准确的地方,不妥之处恳请读者批评指正.

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我.

原文链接:https://blog.51cto.com/suifu/1878443 。

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