Centos7 uses shell script to install mysql8.0

All files in the script path

• install.cnf: script configuration file
• my.cnf: database configuration file
• mysql-8.0.19-1.el7.x86_64.rpm-bundle.tar: database installation package, download method: https://downloads.mysql.com/archives/community/ (browser download), wget https:// dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.19-1.el7.x86_64.rpm-bundle.tar (local download)
• mysql8.0_install.sh: mysql8.0 installation script

Script content

#!/bin/bash
#导入配置文件
source /home/package/install.cnf

#检查md5值
function check_md5(){
    
    

if [ "$1" = "$2" ]
then
echo "-----------------------------------'$3'packag ok ----------------------------------------"
else
echo "-----------------------------------'$3' packag error pleas reinstall ----------------------------------------" >> $package_dir/ad_install.log
exit
fi
}

#mysql rpm安装包检查
function check_mysql_rpm(){
    
    
#检查是否存在mariadb的rpm,是则删除
ma=`rpm -qa |grep mariadb`
$mariadb_check=${
    
    ma:0:7}
echo $mariadb_check

for i in $ma
do
        echo "exist mariadb.rpm,will remove it"
        rpm -e $i --nodeps
done


#检查是否与mysql8的rpm存在
a=`rpm -qa | grep "$1"`
b=${
    
    a:16}
c=${
    
    b//./}
check_result=${
    
    c//-/}
echo $check_result
#如果模块存在则继续，如果模块不存在则安装，安装后若仍旧判断为不存在，则报错退出
if (($check_result==$2))
then
        echo "$1  exist,continue"
else
        rpm -ivh $3 --nodeps
        a=`rpm -qa | grep "$1"`
        b=${
    
    a:16}
        c=${
    
    b//./}
        check_result=${
    
    c//-/}
        if (($check_result==$2))
        then
                echo "$1  exist,continue"
        else
                echo "something  wrong with $1,exit" >> $package_dir/ad_install.log
        fi
fi
}

#安装mysql8.0
function mysql_install(){
    
    
echo "start install mysql8.0"
#判断安装包是否存在，不存在则报错
if [ ! -f $package_dir/mysql-8.0.19-1.el7.x86_64.rpm-bundle.tar ]
then
        echo "mysql-8.0.19-1.el7.x86_64.rpm-bundle.tar not exist,please check" >> $package_dir/ad_install.log
        echo "quit install"
        exit
fi

cd $package_dir
#检查mysql安装包的md5值
mysql_md5_now=`md5sum "$package_dir/mysql-8.0.19-1.el7.x86_64.rpm-bundle.tar" | awk '{print $1}'`
check_md5 $mysql_md5_now $mysql_md5_origin mysql-8.0.19-1.el7.x86_64.rpm-bundle.tar

#解压安装包
echo "unpack mysql package"
tar -xvf $package_dir/mysql-8.0.19-1.el7.x86_64.rpm-bundle.tar
mkdir $package_dir/mysql_rpm
mv mysql-community* $package_dir/mysql_rpm
#
cd $package_dir/mysql_rpm
#
##调用方法检查mysql的各个rpm模块是否存在，不存在则安装
echo "install mysql rpms"

check_mysql_rpm mysql-community-common-8.0.19-1.el7.x86_64 common80191el7x86_64 mysql-community-common-8.0.19-1.el7.x86_64.rpm
check_mysql_rpm mysql-community-libs-8.0.19-1.el7.x86_64 libs80191el7x86_64 mysql-community-libs-8.0.19-1.el7.x86_64.rpm
check_mysql_rpm mysql-community-libs-compat-8.0.19-1.el7.x86_64 libscompat80191el7x86_64 mysql-community-libs-compat-8.0.19-1.el7.x86_64.rpm
check_mysql_rpm mysql-community-client-8.0.19-1.el7.x86_64 client80191el7x86_64 mysql-community-client-8.0.19-1.el7.x86_64.rpm
check_mysql_rpm mysql-community-server-8.0.19-1.el7.x86_64 server80191el7x86_64 mysql-community-server-8.0.19-1.el7.x86_64.rpm


#修改配置文件，主要修改内容有端口、安装路径、错误日志路径等
mv /etc/my.cnf /etc/my.cnf.bak
cp $package_dir/my.cnf /etc/my.cnf
sed -ri 's#(port            =)[^ ]*#\port            ='$mysql_port'#' /etc/my.cnf
sed -ri 's#(log-error       =)[^ ]*#log-error       ='$mysql_errlog'#' /etc/my.cnf
sed -ri 's#(basedir         =)[^ ]*#\basedir         ='$mysql_basedir'#' /etc/my.cnf
sed -ri 's#(datadir         =)[^ ]*#\datadir         ='$mysql_datadir'#' /etc/my.cnf
sed -ri 's#(socket          =)[^ ]*#\socket          ='$mysql_basedir/mysql.sock'#' /etc/my.cnf
#

#创建mysql安装路径
if [ ! -d $mysql_basedir ]
then
        mkdir -p $mysql_basedir
else
        rm -rf $mysql_basedir/*
fi
chown -R mysql:mysql $mysql_basedir

#mysql指定参数初始化
echo "start initialize mysql"
/sbin/mysqld --user=mysql --lower-case-table-names=1 --initialize --basedir=$mysql_basedir --datadir=$mysql_datadir

chown -R mysql:mysql $mysql_basedir

#复制errmsg.sys文件到指定路径，防止报错
mkdir  -p $mysql_basedir/share/mysql-8.0
cp /usr/share/mysql-8.0/english/errmsg.sys $mysql_basedir/share/mysql-8.0/
chown -R mysql:mysql $mysql_basedir/share
chmod 744 $mysql_basedir/share/mysql-8.0/errmsg.sys

#启动mysql并设置开机自启动
echo "start mysql"
systemctl start mysqld
systemctl enable mysqld

#获取mysql初始密码
mysql_passwd_origin=`cat "$mysql_errlog" | grep password | head -1 | rev  | cut -d ' ' -f 1 | rev`
echo $mysql_passwd_origin

#使用初始密码连接mysql并更改密码，root用户授权
mysql --connect-expired-password  -uroot -p"$mysql_passwd_origin"  >tables.txt  <<EOF
alter user 'root'@'localhost' identified  by '$mysql_passwd';
create user 'root'@'%' identified  by '$mysql_passwd';
grant all privileges on *.* to 'root'@'%' with grant option;
create user 'root'@'127.0.0.1' identified  by '$mysql_passwd';
grant all privileges on *.* to 'root'@'127.0.0.1' with grant option;
flush privileges;
quit
EOF
}

Configuration file install.cnf content

#mysql8.0_install.sh配置文件

#安装包所在的目录
package_dir=/home/package
#表示mysql的安装路径
mysql_basedir=/home/mysql8.0
#mysql数据路径
mysql_datadir=/home/mysql8.0/data
#mysql错误日志路径
mysql_errlog=/home/mysql8.0/data/mysqld.log
#表示mysql root用户的密码
mysql_passwd=123456
#表示mariadb10.0.38的md5值
mysql_md5_origin=7c908c1da4609eb45c039bd67d4545ee
#mysql的端口
mysql_port=3308

Database configuration file my.cnf content

[client]
socket          =/home/mysql/mysql.sock
port            =3306
[mysqld_safe]
[mysqld]
port            =3306
log-error       =/home/mysql/log/mysqld.log
basedir         =/home/mysql
datadir         =/home/mysql/data
socket          =/home/mysql/mysql.sock
slow_query_log = on
long_query_time = 1
min_examined_row_limit = 1
lower_case_table_names=1
innodb_buffer_pool_size = 6G
innodb_flush_log_at_trx_commit = 2
default_authentication_plugin=mysql_native_password

This is my fixed configuration template for installing mysql. The configuration of the database is changed on this basis

Installation method

1. Modify the configuration in install.cnf
2. Download the installation package
3. Modify the path and name of the configuration file in mysql8.0_install.sh
4. Execute the script