1.设置主从从mysql57服务器
（1）配置主数据库
root@msater_5 \~\]# systemctl stop \[root@msater_5 \~\]# setenforce 0 \[root@msater_5 \~\]# systemctl disable Removed symlink /etc/systemd/system/multi-user.target.wants/# ls anaconda-ks.cfg mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz \[root@msater_5 \~\]# tar -xf mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz \[root@msater_5 \~\]# ls anaconda-ks.cfg mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz mysql-5.7.44-linux-glibc2.12-x86_64 \[root@msater_5 \~\]# cp -r mysql-5.7.44-linux-glibc2.12-x86_64 /usr/local/mysql \[root@msater_5 \~\]# rm -rf /etc/my.cnf \[root@msater_5 \~\]# mkdir /usr/local/mysql/mysql-\[root@msater_5 \~\]# useradd -r -s /sbin/nologin mysql \[root@msater_5 \~\]# chown mysql:mysql /usr/local/mysql/mysql-\[root@msater_5 \~\]# chown 750 /usr/local/mysql/mysql-\[root@msater_5 \~\]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql 2024-08-21T09:39:14.991434Z 0 \[Warning\] TIMESTAMP with implicit DEFAULT value is deprecated. Please use - -explicit_defaults_for_timestamp server option (see documentation for more details). 2024-08-21T09:39:15.126969Z 0 \[Warning\] InnoDB: New log LSN=45790 2024-08-21T09:39:15.150963Z 0 \[Warning\] InnoDB: Creating foreign key constraint system tables. 2024-08-21T09:39:15.214887Z 0 \[Warning\] No existing UUID has been found, so we assume that this is the 2024-08-21T09:39:15.215926Z 0 \[Warning\] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2024-08-21T09:39:16.034519Z 0 \[Warning\] A deprecated TLS version TLSv1 is enabled. Please use TLSv1.2 or higher. 2024-08-21T09:39:16.034537Z 0 \[Warning\] A deprecated TLS version TLSv1.1 is enabled. Please use TLSv1.2 or higher. 2024-08-21T09:39:16.036321Z 0 \[Warning\] CA certi2024-08-21T09:39:16.384066Z 1 \[Note\] A temporary password is generated for root@localhost: RV3DtuxCi;A- \[root@msater_5 \~\]# cp /usr/local/mysql/support-\[root@msater_5 \~\]# vim /usr/local/mysql/my.cnf \[mysqld
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-error=/usr/local/mysql/data/db01-master.err
log-bin=/usr/local/mysql/data/binlog
server-id=10
character_set_server=utf8mb4
（2）配置slave01数据库
（3）配置slave02数据库
（4）同步data
(5)修改slave01配置文件
（6）修改slave02配置文件
（7）主服务器锁表
（8）配置主从服务
（9）配置主从从服务
2.在mysql中添加eleme数据库并设置为utf8mb4
3.添加表t_user(master)
4.添加2行记录（master）
5.远程登录工具查看表数据
6.使用mycat为三台数据库设置负载均衡（读写分离）
（1）前期环境部署
（2）修改server.xml配置文件
root@mycat \~\]# vim /usr/local/mycat/conf/server.xml  ### （3）修改schema.xml配置文件 1.设置schema标签 添加dataNode="xxx" name=eleme 2.修改dataHost标签   ### （4）启动服务  ## 7.客户端测试mycat    ## 8.部署java17环境 ### （1）java01    ### （2）浏览器访问：192.168.2.12:8080   ### （3）java02   ### （4）浏览器访问：192.168.2.12:8080   ## 9.部署LVS-nat模式 ### （1）lvs  ### (2) java01  ### (3) java02  ### （4）浏览器访问：192.168.2.150：8080（外网地址）  