How to quickly use mysqlreplicate to build MySQL master and slave
- 2021-12-04 11:32:12
- OfStack
Brief introduction
mysql-utilities toolset is a collection of various tools, which can be understood as DBA toolbox. This paper introduces the use of mysqlreplicate tools to quickly build MySQL master-slave environment.
HE1:192.168.1.248 slave
HE3:192.168.1.250 master
Actual combat
Part1: Install 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: Basic usage
[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: Master Library Preparation
Master library creates replication users
[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: 1 Key Configuration
Configure from the library and execute the following commands from the master to the slave
[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.Check
Part 1: mysqlrplcheck Check
[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.
Other Common Tools
Part 1: mysqldiskusage Check database space size
[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 Check for Redundant Indexes
[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-Summary-
It can be seen that it is very simple to configure MySQL master and slave with mysqlreplicate in mysql-utilities toolset, and mysqlreplicate also provides various parameters. In this article,-b means that replication starts from the first event in the master binary log. -s in mysqlrplcheck refers to the output of show slave status\ G. Due to the limited level of the author, the writing time is also very hasty, the text will inevitably appear some mistakes or inaccurate places, inappropriate places please criticize and correct readers.