mysql主从数据库（5.7版本）与python的交互及mycat

mysql数据库基本操作：

$root@m \~\]# tar -xf mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz 解压压缩包 \[root@m \~\]# ls anaconda-ks.cfg mysql-5.7.44-linux-glibc2.12-x86_64 mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz \[root@m \~\]# cp -r mysql-5.7.44-linux-glibc2.12-x86_64 /usr/local/mysql \[root@m \~\]# rm -rf /etc/my.cnf \[root@m \~\]# mkdir /usr/local/mysql/mysql-files \[root@m \~\]# useradd -r -s /sbin/nologin mysql \[root@m \~\]# chown mysql:mysql /usr/local/mysql/mysql-files/ \[root@m \~\]# chmod 750 /usr/local/mysql/mysql-files/ 授予权限 \[root@m \~\]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql/ 进行初始化 2024-08-15T02:37:51.714490Z 0 \[Warning\] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2024-08-15T02:37:51.883374Z 0 \[Warning\] InnoDB: New log files created, LSN=45790 2024-08-15T02:37:51.927026Z 0 \[Warning\] InnoDB: Creating foreign key constraint system tables. 2024-08-15T02:37:51.985501Z 0 \[Warning\] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 5e50091b-5aaf-11ef-903e-000c2962cb99. 2024-08-15T02:37:51.986327Z 0 \[Warning\] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2024-08-15T02:37:53.342567Z 0 \[Warning\] A deprecated TLS version TLSv1 is enabled. Please use TLSv1.2 or higher. 2024-08-15T02:37:53.342586Z 0 \[Warning\] A deprecated TLS version TLSv1.1 is enabled. Please use TLSv1.2 or higher. 2024-08-15T02:37:53.344783Z 0 \[Warning\] CA certificate ca.pem is self signed. 2024-08-15T02:37:53.842790Z 1 \[Note\] A temporary password is generated for root@localhost: UW2j.oFipqq= 获得原始密码 \[root@m \~\]# ls anaconda-ks.cfg mysql-5.7.44-linux-glibc2.12-x86_64 mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz \[root@m \~\]# ls /usr/local/mysql/ bin docs lib man README support-files data include LICENSE mysql-files share \[root@m \~\]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql57 \[root@m \~\]# service mysql57 start 启动mysql Starting MySQL.Logging to '/usr/local/mysql/data/m.sql.err'. SUCCESS! 修改配置文件 \[root@m \~\]# vim /usr/local/mysql/my.cnf 主服务器的配置文件 \[mysqld$
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-error=/usr/local/mysql/data/db01-master.err
log-bin=/usr/local/mysql/data/binlog
server-id=10
character_set_server=utf8mb4
$root@m \~\]# /usr/local/mysql/bin/mysql -p 开启mysql Enter password: Welcome to the MySQL monitor. Commands end with ; or \\g. Your MySQL connection id is 2 Server version: 5.7.44 Copyright (c) 2000, 2023, Oracle and/or its affiliates. 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\> alter user 'root'@'localhost' identified by 'root'; 修改数据库账号 Query OK, 0 rows affected (0.00 sec) mysql\> create user 'chz'@'%' identified by 'chz'; 创建可以连接外部的账号 Query OK, 0 rows affected (0.00 sec) mysql\> grant all on \*.\* to 'chz'@'%'; 授予权限 Query OK, 0 rows affected (0.00 sec) mysql\> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql\> mysql\> create database if not exists test charset utf8mb4 -\> ; Query OK, 1 row affected (0.00 sec) mysql\> use test Database changed mysql\> create table user(id int primary key auto_increment,username varchar(45) not null,password varchar(45) not null); Query OK, 0 rows affected (0.00 sec) mysql\> insert into user (username,password)values("aaa","aaa"); Query OK, 1 row affected (0.01 sec) mysql\> select \* from user -\> ; +----+----------+----------+ \| id \| username \| password \| +----+----------+----------+ \| 1 \| aaa \| aaa \| +----+----------+----------+ 1 row in set (0.00 sec) mysql\> mysql\> select host ,user from mysql.user; +-----------+---------------+ \| host \| user \| +-----------+---------------+ \| % \| chz \| \| % \| slave0 \| \| localhost \| mysql.session \| \| localhost \| mysql.sys \| \| localhost \| root \| +-----------+---------------+ 5 rows in set (0.00 sec) mysql\> update mysql.user set host='%' where user='root'; Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql\> flush privileges;$

交互

在python（写成脚本执行）

import pymysql

conn=pymysql.connect(host="192.168.2.50",port=3306,database="test",user="root",password="root");

cursor=conn.cursor()

cursor.execute("create user 'slave2'@'%' identified by 'slave2'")

cursor.execute("grant replication slave on *.* to 'slave2'@'%'")

cursor.execute("flush privileges")

cursor.execute("flush tables with read lock")

cursor.execute("show master status")

print(cursor.fetchall())

isOk=input("slave server ok? y/n")

if isOK=='y':

cursor.execute("unlock tables")

cursor.execute("flush tables with read lock") 锁表

cursor.execute("unlock tables") 取消锁表

mycat

root@mycat \~\]# ls anaconda-ks.cfg jre-8u191-linux-x64.tar.gz jdk-8u192-linux-x64.tar.gz Mycat-server-1.6.5-release-20180122220033-linux.tar.gz \[root@mycat \~\]# tar -xf jdk-8u192-linux-x64.tar.gz \[root@mycat \~\]# tar -xf Mycat-server-1.6.5-release-20180122220033-linux.tar.gz \[root@mycat \~\]# ls anaconda-ks.cfg jre-8u191-linux-x64.tar.gz jdk1.8.0_192 mycat jdk-8u192-linux-x64.tar.gz Mycat-server-1.6.5-release-20180122220033-linux.tar.gz \[root@mycat \~\]# cp -r jdk1.8.0_192/ /usr/local/jdk \[root@mycat \~\]# cp -r mycat/ /usr/local/ 查看并且配置jdk文件 \[root@mycat \~\]# sed -i '$aexport JAVA_HOME=/usr/local/jdk' /etc/profile \[root@mycat \~\]# source /etc/profile \[root@mycat \~\]# $JAVA_HOME -bash: /usr/local/jdk: 是一个目录 \[root@mycat \~\]# sed -i '$aexport PATH=$PATH:$JAVA_HOME/bin' /etc/profile \[root@mycat \~\]# source /etc/profile \[root@mycat \~\]# $PATH -bash: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/jdk/BIN:/usr/local/jdk/bin: 没有那个文件或目录 \[root@mycat \~\]# java -version java version "1.8.0_192" Java(TM) SE Runtime Environment (build 1.8.0_192-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.192-b12, mixed mode) \[root@mycat \~\]# javac -version javac 1.8.0_192 \[root@mycat \~\]# /usr/local/mycat/bin/mycat console 启动mycat Running Mycat-server... wrapper \| --\> Wrapper Started as Console wrapper \| Launching a JVM... jvm 1 \| Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=64M; support was removed in 8.0 jvm 1 \| Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org jvm 1 \| Copyright 1999-2006 Tanuki Software, Inc. All Rights Reserved. jvm 1 \| jvm 1 \| log4j:WARN No appenders could be found for logger (io.mycat.memory.MyCatMemory). jvm 1 \| log4j:WARN Please initialize the log4j system properly. jvm 1 \| log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. jvm 1 \| MyCAT Server startup successfully. see logs in logs/mycat.log 启动成功 \[root@mycat \~\]# vim /usr/local/mycat/conf/server.xml ![](https://i-blog.csdnimg.cn/direct/7cdc62027c3742f49c614a9f634abadf.png) ![](https://i-blog.csdnimg.cn/direct/618b91f436ab4758a335a37fdb21f953.png) \[root@mycat \~\]# vim /usr/local/mycat/conf/server.xml 数据库的账号，数据库的密码，数据库 ![](https://i-blog.csdnimg.cn/direct/1a2606d0b553439e92f005c6b0dead69.png) 注释掉 ![](https://i-blog.csdnimg.cn/direct/49b9b6e6faaf494692329b3ea8897fe5.png) \[root@mycat \~\]# vim /usr/local/mycat/conf/schema.xml 删除前面的，然后修改 ![](https://i-blog.csdnimg.cn/direct/9b6dd5ad9122419eaf988212e7389ee0.png) ![](https://i-blog.csdnimg.cn/direct/816562f00e29496e86606218a4723c9b.png) ![](https://i-blog.csdnimg.cn/direct/52f9bfc9c3e54f3b834d16ffabcac8ff.png) \[root@mycat \~\]# /usr/local/mycat/bin/mycat start Starting Mycat-server... \[root@mycat \~\]# netstat -lnput \| grep 8066 ![](https://i-blog.csdnimg.cn/direct/3eeacb6300084ec1bb0265ef60190ac1.png) 测试连接 \[root@client \~\]# cd mysql-8.0.33-linuxglibc2.12-x86_64/ \[root@client mysql-8.0.33-linuxglibc2.12-x86_64\]# cd bin/ \[root@client bin\]# ./mysql -h10.1.1.60 - P8066 -uchz -pchz