One single installation mysql

mkdir /usr/local/mysql && cd /usr/local/mysql/

wget https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.29-1.el7.x86_64.rpm-bundle.tar

tar -xvf mysql-8.0.29-1.el7.x86_64.rpm-bundle.tar

install

rpm -ivh mysql-community-common-8.0.29-1.el7.x86_64.rpm mysql-community-libs-8.0.29-1.el7.x86_64.rpm mysql-community-libs-compat-8.0.29-1.el7.x86_64.rpm mysql-community-client-8.0.29-1.el7.x86_64.rpm mysql-community-server-8.0.29-1.el7.x86_64.rpm --nodeps --force

initialization

mysqld --initialize;chown mysql:mysql /var/lib/mysql -R;systemctl start mysqld.service;systemctl enable mysqld;

View the default password

cat /var/log/mysqld.log | grep password

Login to change password

mysql -uroot -p

Change Password

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';

Remote login authorization

User view

select host, user, authentication_string, plugin from mysql.user;

establish %root

create user 'root'@'%' identified with mysql_native_password by '123456';

  For the new root Authorize remote login

 GRANT ALL ON *.* TO 'root'@'%';

A master from

192.168.10.30 Lord

192.168.10.31 from

Modify the configuration file vim/etc/my.conf

The following configurations are mainly added

#  The primary server is unique ID
server-id = 1
#  Start binary log 
log-bin = mysql-bin
#  Set up the database not to be copied 
binlog-ignore-db = mysql
binlog-ignore-db = information_scheam
#  Libraries that need to be copied 
binlog-do-db = mydb1

#  Set up binlog Format   Default  STATEMENT
# STATEMENT  Copy sql  But if there is set time=now() In operation   Data is delayed   The time will be different 
# ROW  Copy each line   There will be no now problem   But if sql If the sentence affects too much  STATEMENT The execution efficiency will be higher than ROW
# MIXED  The above    But it can't contain @@ System variables   The master-slave replication will be inconsistent 
binlog_format = STATEMENT

from Modify the configuration file and add the following configuration

server-id =2
relay-log =mysql-relay

Restart two mysql service

systemctl restart mysqld

On a host Check the host status , After that, there can be no operation If there is The access point will change .

show master status;

Slave Execute the following synchronization code , file and pos Keep the host consistent .

CHANGE MASTER TO MASTER_HOST='192.168.10.30',
MASTER_USER='root',
MASTER_PASSWORD='123456',
MASTER_LOG_FILE='mysql-bin.000001',
MASTER_LOG_POS=157;

Slave execution

start slave; 

Check the slave status

show slave status\G;

 Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

It means that the master and slave are successful .

test

Host create Library Build table insert data ; Indicates that it must be the table configured for synchronization above .

create database mydb1;
create table mydb1.mytb1(id int,name varchar(50));
insert into mydb1.mytb1 values(1,"gz");

  Slave query

If the setup fails You can stop slave synchronization Reset host go back to   Slave Execute the following synchronization code Re operate at

stop slave;

reset master;

mycat Read / write separation

  build mycat The server , Refer to the previous article .

Connect mycat The server

 mysql -uroot -p -h 192.168.10.30 -P 8066

stay MYSQL Window execution

Add data sources 1

/*+ mycat:createDataSource{
"name":"dw0",
"url":"jdbc:mysql://192.168.10.30:3306/?useSSL=false&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true",
"user":"root",
"password":"123456"
} */;

Automatically generate configuration files after execution

  Add data sources 2

/*+ mycat:createDataSource{
"name":"dr0",
"url":"jdbc:mysql://192.168.10.31:3306/?useSSL=false&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true",
"user":"root",
"password":"123456"
} */;

  Create a cluster configuration

/*! mycat:createCluster{"name":"prototype","masters":["dw0"],"replicas":["dr0"]} */;

Generate the configuration file after completion

establish mycat Logical library

Execute the script mydb1 Already in mysql There is an entity library , After creation, the library and table will be synchronized automatically Interface

/*+ mycat:createSchema{
  "customTables":{},
  "globalTables":{},
  "normalTables":{},
  "schemaName":"mydb1",
  "shardingTables":{},
  "targetName":"mycluster"
} */;

Generate a configuration file after execution

You can see Once the data source matches The mapped logical library will be automatically generated in the logical library ,mycat Operate the database by operating the logical library .

Borrow a picture from the Internet ：

test

operation mycat Insert data into the logical library

Master library slave Library You can look it up