mysql master-slave configuration

mysql linux free installation configuration

 

1. The original installation must be deleted before installation

You need to check whether the following files exist , and delete them if they are stored

/etc/my.cnf

/etc/init.d/mysqld

2. mysql- dependent libraries

shell> yum search libaio # search for info

shell> yum install libaio # install library

3. Create mysql and user groups, -s /bin/false means that the user cannot log in 

shell> groupadd mysql

shell> useradd -r -g mysql -s /bin/false mysql

 4. Unzip the installation package to the specified directory

shell> tar zxvf /path/to/mysql-VERSION-OS.tar.gz

shell> ln -s full-path-to-mysql-VERSION-OS mysql

shell> cd mysql

5. Add permissions for the mysql user

shell> chown -R mysql ./

shell> chgrp -R mysql ./

#Create data directory and add permissions

shell> mkdir -p /data/mysql

shell> chown -R mysql:mysql /data/mysql

6. Copy the configuration file

shell> cp support-files/my-default.cnf  /etc/my.cnf

#Change setting

shell> vim /etc/my.cnf

shell> cp support-files/mysql.server /etc/init.d/mysql

7. Initialize the mysql library

shell> ./scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql

8. Add environment variables

shell> vi /etc/profile

PATH=/home/cbt/svr/mysql/bin:$PATH

export PATH

#Make the changes just now take effect

shell> source /etc/profile

9. Startup and other configurations #Start the database

service mysql start

(If the startup fails, check the hosts file to configure the IP address)

#boot start

chkconfig mysqld on

 

#initialize some settings of mysql

mysql_secure_installation

#enter

Enter current password for root (enter for none):

#y, set the root password of mysql

Set root password?[Y/n] y

#The following are all yes

Remove anonymous users?[Y/n] y

Disallow root login remotely?[Y/n] y

Remove test database and access to it?[Y/n] y

Reload privilege tables now?[Y/n] y

ThanksforusingMySQL!

 10. Allow remote login

1. mysql> use mysql;

2. mysql> select host,user,password from user;

3. mysql> update user set password=password('123456') where user='root';

4. mysql> update user set host='%' where user='root' and host='localhost';

5. mysql> flush privileges;

++++++++++++++++++++++++++++++++++++++++++++++++++

The basic idea of ​​configuring master-slave synchronization is as follows:

1.master my.cnf configuration

#Database ID number, when it is 1, it means Master, where master_id must be a positive integer value between 1 and 232-1;   
server-id = 1  
#binlog format
binlog-format=ROW
#Enable binary logging;
log-bin=mysql-master-bin
#Whether it is recorded in the log when the slave is updated; log-slave-updates=true
#Open semi-synchronization rpl_semi_sync_master_enabled=ON
#The name of the binary database that needs to be synchronized;
binlog-do-db=tuling (here you need to synchronize the database)
#The name of the unsynchronized binary database, if it is not set, it can be commented out;
binlog-ignore-db=information_schema
binlog-ignore-db=mysql
binlog-ignore-db=personalsite
binlog-ignore-db=test
#Set the generated log file name;  
log-bin="D:/Database/materlog"  
#Write the updated record to the binary file;  
log-slave-updates  

(If mysql cannot be started after restarting, it is found that   there is a problem with rpl_semi_sync_master_enabled=ON by looking for the err file, comment it out )

Configure semi-sync by following steps

mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so';
Query OK, 0 rows affected (0.21 sec)

mysql> show variables like 'rpl_%';
+------------------------------------+-------+
| Variable_name                      | Value |
+------------------------------------+-------+
| rpl_recovery_rank                  | 0     |
| rpl_semi_sync_master_enabled       | OFF   |
| rpl_semi_sync_master_timeout       | 10000 |
| rpl_semi_sync_master_trace_level   | 32    |
| rpl_semi_sync_master_wait_no_slave | ON    |
+------------------------------------+-------+
5 rows in set (0.00 sec)
Set variable to enable semi-synchronous replication

mysql> set global rpl_semi_sync_master_enabled=on ;
Query OK, 0 rows affected (0.02 sec)
mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so';
Query OK, 0 rows affected (0.21 sec)

mysql> show variables like 'rpl_%';
+------------------------------------+-------+
| Variable_name                      | Value |
+------------------------------------+-------+
| rpl_recovery_rank                  | 0     |
| rpl_semi_sync_master_enabled       | OFF   |
| rpl_semi_sync_master_timeout       | 10000 |
| rpl_semi_sync_master_trace_level   | 32    |
| rpl_semi_sync_master_wait_no_slave | ON    |
+------------------------------------+-------+
5 rows in set (0.00 sec)
Set variable to enable semi-synchronous replication
mysql> set global rpl_semi_sync_master_enabled=on ;
Query OK, 0 rows affected (0.02 sec)

2. Create a user database for master-slave synchronization (it is a user used to connect with the slave database, not related to the login account of the master database)

grant replication slave,super,reload on *.* to slave1@192.168.142.128 identified by '123456';

3. View the master node status

mysql> show master status

#View the connected slave host on the main library

mysql> show slave hosts;

#View all binlog logs

mysql> show binary logs;

#View all binlog events

mysql> show binlog events in 'mysql-bin.000003';

4.slave my.cnf configuration

#If the Slave library needs to be added, this id will be postponed;  
server-id = 2    
log-bin=mysql-bin  
#Main library host  
master-host = 192.168.168.253  
#The user established in the master database server for the backup of the slave server  
master-user = enslave  
master-password = ******  
master-port = 3306  
#If the main server is found to be disconnected, the time difference for reconnection;  
master-connect-retry=60  
#Databases that do not need to be backed up;   
replicate-ignore-db=mysql  
#Database to be backed up  
replicate-do-db=minishop  
log-slave-update

5.Slave related operations

#start slave

mysql>start slave;

mysql>stop slave;

#View slave status

show slave status\G;

Remarks: 1) Run the configured master database server before the slave database server, so when running the slave database server, the File and Position of the master library and the settings of Master_Log_File and Read_Master_Log_Pos on the slave library will be consistent. Otherwise, inconsistencies may occur. This can also be adjusted by command.

2) If you find that the master-slave replication fails, you can first shut down the slave database server, then delete the relay-log.info, hosname-relay-bin*, master.info and other files in the data directory of the slave database server, and restart the slave server.

The slave node modifies the master configuration

mysql>change master to master_host='192.168.142.128', master_user='slave1', master_password='123456' ,MASTER_AUTO_POSITION = 341;

 

 

Separation of read and write to achieve 360 ​​Atlas

 

Install and uninstall Atlas

#install _

shell> rpm -i Atlas-2.2.1.el6.x86_64.rpm

#uninstall _

shell> rpm -e Atlas-2.2.1.el6.x86_64.rpm

The installation directory is in  /usr/local/mysql-proxy/

Atlass configuration

#The IP and port of the MySQL main library connected to the Atlas backend , multiple items can be set, separated by commas

proxy-backend-addresses = 127.0.0.1:3306

#The IP and port of the MySQL slave library connected to the Atlas backend. The number after @ represents the weight, which is used for load balancing. If omitted, the default value is 1. Multiple items can be set, separated by commas.

#proxy-read-only-backend-addresses = 127.0.0.1:3305@1

#Username and its corresponding encrypted MySQL password. The password is encrypted using the encryption program encrypt in the PREFIX/bin directory . User password All master and slave libraries must be one to one

pwds = root:/iZxz+0GRoA=

#Atlas listens on the working interface IP and port

proxy-address = 0.0.0.0:1234

 

Start and shut down Atlas

./mysql-proxyd test start

./mysql-proxyd test stop

Admin login as proxy

mysql -h127.0.0.1 -P2345 -uroot -proot