MySQL-5.7.38 基于二进制包一键安装脚本

#!/bin/bash
#
#********************************************************************
#Author:			Kevin
#Date: 				2024-06-23
#FileName：			install_mysql.sh
#Description：		The test script
#Copyright (C): 	2024 All rights reserved
#********************************************************************


SCRIPT_NAME=$(basename $0)
COLOR="echo -e \e[1;32m"
END="\e[0m"

SRC_DIR='/usr/local/src'
SYSTEM_FILE="/etc/*-release"
MYSQL_VERSION='5.7'
MYSQL_FILE='mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz'
MYSQL_DOWNLOAD_URL='https://mirrors.huaweicloud.com/mysql/Downloads/MySQL'
MYSQL_ROOT_PASSWORD='magedu'

# 加载函数
source /etc/profile.d/color.sh

# 检查用户
check_user(){
	if [ ! $UID -eq 0 ];then 
		{ color "${SCRIPT_NAME}: 当前用户不是root,安装失败" 1 ; exit ; }
	fi
}

# 检查操作系统
check_os(){
	if grep -Ewqi  "Rocky|CentOS"  /etc/issue  ||  grep -Ewqi  "Rocky|CentOS"  /etc/*-release ;then  
        if ! rpm -q redhat-lsb-core &> /dev/null ;then
			dnf -y install redhat-lsb-core &> /dev/null 
			color "${SCRIPT_NAME}: lsb_release 工具安装完成." 0 
		fi
		OS_ID=$(lsb_release -si)
		OS_VERSION=$(lsb_release -sr | sed -nr 's/(^.*)\..*$/\1/p')
	fi
}

# 二进制文件存在性检查
check_file(){
    cd ${SRC_DIR}
    
	rpm -q wget &> /dev/null || dnf -y install wget &> /dev/null
    if [ ! -e ${MYSQL_FILE} ] ;then
        color "${SCRIPT_NAME}: 开始下载 'MySQL' 二进制安装包." 0
        if wget ${MYSQL_DOWNLOAD_URL}-${MYSQL_VERSION}/${MYSQL_FILE} &>/dev/null ;then
            color "${SCRIPT_NAME}: ${MYSQL_FILE} 文件下载成功." 0
        else
            color "${SCRIPT_NAME}: ${MYSQL_FILE} 文件下载失败" 1 
			exit
        fi
    else
        color "${SCRIPT_NAME}: ${MYSQL_FILE} 文件已存在." 3
		return
	fi
}

# 数据库存在性检查
check_mysql(){
    if [ -e /usr/local/mysql ];then
        color "${SCRIPT_NAME}: MySQL 数据库已存在,安装失败." 1
        exit
    fi
}

# 开始安装mysql数据库
install_mysql(){
    cd ${SRC_DIR}
    
    # 安装依赖包
    ${COLOR}''开始下载 \'MySQL\' 依赖包,请稍等...''${END}
    dnf -y install libaio perl-Data-Dumper ncurses-compat-libs &>/dev/null
    
    # 解包 & 创建软链接
    ${COLOR}''开始安装 \'MySQL\' 数据库,请稍等...''${END}
    tar xf ${MYSQL_FILE} -C /usr/local
    MYSQL_DIR=$(echo ${MYSQL_FILE}|sed -rn 's/(^.*[0-9]+).*/\1/p')
    ln -s  ${MYSQL_DIR}  ../mysql

    # 创建系统用户和组
	if ! id -u mysql &> /dev/null ; then
		groupadd -g 3306 mysql
		useradd -r -g 3306 -s /sbin/nologin mysql
		color "mysql 用户创建成功." 0
	fi
	chown -R mysql.mysql /usr/local/mysql
	
	# 添加PATH变量
	echo "PATH=/usr/local/mysql/bin/:$PATH" > /etc/profile.d/mysql.sh
	. /etc/profile.d/mysql.sh
	
	# 编写配置文件
	cat > /etc/my.cnf <<-EOF
	[mysqld]
	server-id=1
	log-bin
	datadir=/data/mysql
	socket=/data/mysql/mysql.sock
	log-error=/data/mysql/mysql.log
	pid-file=/data/mysql/mysql.pid
	
	[client]
	socket=/data/mysql/mysql.sock
	EOF
    
    # 创建数据目录,设置目录权限
	[ -d /data/mysql ] || mkdir -p /data/mysql &> /dev/null
    chown -R  mysql.mysql /data/mysql

    # 初始化MySQl数据库 生成服务脚本
	mysqld --initialize --user=mysql --datadir=/data/mysql 
    cp /usr/local/mysql/support-files/mysql.server  /etc/init.d/mysqld
    
    # 添加服务列表
    if [ ${OS_ID} == "Rocky" -o ${OS_ID} == "CentOS" ];then
        chkconfig --add mysqld
    fi
    
    # 编写service文件
    cat > /lib/systemd/system/mysqld.service <<-EOF
	[Unit]
	Description=mysql database server
	After=network.target
	
	[Service]
	Type=notify
	PrivateNetwork=false
	Type=forking
	Restart=no
	TimeoutSec=5min
	IgnoreSIGPIPE=no
	KillMode=process
	GuessMainPID=no
	RemainAfterExit=yes
	SuccessExitStatus=5 6
	ExecStart=/etc/init.d/mysqld start
	ExecStop=/etc/init.d//mysqld stop
	ExecReload=/etc/init.d/mysqld reload
	
	[Install]
	WantedBy=multi-user.target
	Alias=mysqld.service
	EOF

	# 加载mysqld.service配置,使其可以被systemd管理
	systemctl daemon-reload # 重新加载systemd管理器配置
    systemctl enable --now mysqld &> /dev/null
    [ $? -ne 0 ] && { color "${SCRIPT_NAME}: 数据库启动失败，退出." 1 ; exit ; }
    
	# 获取数据库旧密码
	MYSQL_OLDPASSWORD=`grep "password" /data/mysql/mysql.log  | sed -nr 's/^.* (.*)$/\1/p'`
    
    # 设置数据库新密码
    mysqladmin  -uroot -p${MYSQL_OLDPASSWORD} password ${MYSQL_ROOT_PASSWORD} &>/dev/null
    color "${SCRIPT_NAME}: MySQL数据库安装完成.  " 0  
}

main(){
    check_user
    check_os
    check_file
    check_mysql
    install_mysql
}

main