簡介
mysql-utilities工具集是一個集中了多種工具的合集，可以理解為是DBA的工具箱，本文介紹利用其中的mysqlreplicate工具來快速搭建MySQL主從環境。
HE1:192.168.1.248 slave
HE3:192.168.1.250 master
實戰
Part1:安裝mysql-utilities
[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
[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:主庫準備
主庫創建復制用戶
[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)
Part4:一鍵配置
從庫進行配置主從執行如下命令
[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.
檢查
Part1:mysqlrplcheck檢查
[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檢查數據庫空間大小
[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檢查冗余索引
[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
——總結——
可以看到利用mysql-utilities工具集中的mysqlreplicate來配置MySQL主從非常簡單，mysqlreplicate也提供了各類參數，本文中的-b是指使復制從主二進制日志中的第一個事件開始。mysqlrplcheck 中的-s是指輸出show slave status\G的內容。由于筆者的水平有限，編寫時間也很倉促，文中難免會出現一些錯誤或者不準確的地方，不妥之處懇請讀者批評指正。
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。
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