MySql自动安装脚本

一、脚本安装流程

1. 添加MySQL的Repository

• 使用wget命令从MySQL官方网站下载Yum Repository的RPM包。
• 使用rpm -ivh命令安装下载的RPM包，以添加MySQL的Yum Repository。

2. 安装mysql-community-server

• 使用yum install -y mysql-community-server --nogpgcheck命令安装MySQL服务器。
• 安装过程中会自动安装MySQL的依赖包。

3. 启动MySQL服务，获取临时密码

• 使用systemctl start mysqld命令启动MySQL服务。
• 使用systemctl enable mysqld命令设置MySQL服务开机自启动。
• 从MySQL日志文件/var/log/mysqld.log中提取临时密码。

4. 修改密码

• 使用mysql --connect-expired-password -uroot -p"$TEMP_PASSWD"命令登录MySQL。
• 使用ALTER USER语句修改root用户的密码。
• 验证新密码是否生效。

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二、卸载MySQL流程

1. 停止MySQL服务

• 使用systemctl stop mysqld命令停止MySQL服务。

2. 卸载MySQL相关包

• 使用yum remove -y命令卸载所有与MySQL相关的包，包括mysql-community-client、mysql-community-server等。

3. 删除MySQL数据和日志文件

• 使用rm -rf命令删除MySQL的数据目录/var/lib/mysql、日志文件/var/log/mysqld.log等。

4. 删除MySQL配置文件

• 使用rm -rf命令删除MySQL的配置文件/etc/my.cnf、/etc/my.cnf.d等。

5. 清理Yum Repository信息

• 使用find命令删除/etc/yum.repos.d/目录下所有与MySQL相关的Repository文件。

6. 清理Yum缓存

• 使用yum clean all命令清理Yum缓存。

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三、Shell脚本

#!/bin/bashset -e# 颜色定义
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
NC='\033[0m' # 恢复默认颜色# 日志文件路径
LOG_FILE="/var/log/mysql_install.log"# MySQL Yum Repository下载URL
DOWNLOAD_URL="https://dev.mysql.com/get/mysql80-community-release-el7-7.noarch.rpm"
RPM_FILE=$(basename "$DOWNLOAD_URL")# MySQL root密码
PASSWD='YourNewRootPasswordHere' # 请替换为实际的新密码# 日志记录函数
log() {echo -e "$(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"
}# 错误处理函数
error_exit() {log "${RED}ERROR: $1${NC}"exit 1
}# 安装MySQL
install_mysql() {log "${GREEN}Adding MySQL Yum Repository...${NC}"wget -c "$DOWNLOAD_URL" || error_exit "Failed to download MySQL Yum Repository."if rpm -ivh "$RPM_FILE"; thenlog "${GREEN}Successfully added MySQL Yum Repository.${NC}"elseerror_exit "Failed to add MySQL Yum Repository."filog "${GREEN}Updating Yum cache...${NC}"yum clean all || error_exit "Failed to clean Yum cache."if yum makecache; thenlog "${GREEN}Yum cache updated successfully.${NC}"elseerror_exit "Failed to update Yum cache."filog "${GREEN}Installing MySQL...${NC}"if yum install -y mysql-community-server --nogpgcheck; thenlog "${GREEN}MySQL installed successfully.${NC}"elseerror_exit "Failed to install MySQL."filog "${GREEN}Starting MySQL service...${NC}"if systemctl start mysqld; thenlog "${GREEN}MySQL service started successfully.${NC}"elseerror_exit "Failed to start MySQL service."fisystemctl enable mysqldsleep 5TEMP_PASSWD=$(grep 'temporary password' /var/log/mysqld.log | awk '{print $NF}')log "${YELLOW}Temporary password is: $TEMP_PASSWD${NC}"log "${GREEN}Changing root password...${NC}"mysql --connect-expired-password -uroot -p"$TEMP_PASSWD" -e "ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '$PASSWD'; flush privileges;" &>/dev/null || error_exit "Failed to change root password."if mysql -uroot -p"$PASSWD" -e "status" &>/dev/null; thenlog "${GREEN}MySQL installation completed and root password changed successfully.${NC}"log "${GREEN}New root password is: $PASSWD${NC}"elseerror_exit "Failed to change root password, please check manually."firm -f "$RPM_FILE"log "${GREEN}Installation script completed successfully.${NC}"
}# 卸载MySQL
uninstall_mysql() {if [ "$EUID" -ne 0 ]; thenecho -e "${RED}Please run as root${NC}"exit 1fiMYSQL_PACKAGES=(mysql-community-clientmysql-community-client-pluginsmysql-community-commonmysql-community-icu-data-filesmysql-community-libsmysql-community-servermysql80-community-release)echo -e "${YELLOW}Stopping MySQL service...${NC}"systemctl stop mysqld || echo -e "${YELLOW}MySQL service already stopped.${NC}"for pkg in "${MYSQL_PACKAGES[@]}"; doif rpm -q "$pkg" &>/dev/null; thenecho -e "${YELLOW}Uninstalling $pkg...${NC}"yum remove -y "$pkg"elseecho -e "${YELLOW}$pkg is not installed.${NC}"fidoneecho -e "${YELLOW}Deleting MySQL data and log files...${NC}"rm -rf /var/lib/mysql /var/log/mysqld.log /var/run/mysqldecho -e "${YELLOW}Deleting MySQL configuration files...${NC}"rm -rf /etc/my.cnf /etc/my.cnf.d /etc/mysqlecho -e "${YELLOW}Cleaning up Yum repository information...${NC}"find /etc/yum.repos.d/ -type f -name "mysql-community*" -exec rm -f {} \;echo -e "${YELLOW}Cleaning Yum cache...${NC}"yum clean allecho -e "${GREEN}MySQL and its databases have been successfully removed from your system.${NC}"
}# 用户界面
show_menu() {echo -e "${GREEN}===================================${NC}"echo -e "${GREEN}  MySQL Installation/Uninstallation  ${NC}"echo -e "${GREEN}===================================${NC}"echo -e "1. Install MySQL"echo -e "2. Uninstall MySQL"echo -e "3. Exit"echo -e "${GREEN}===================================${NC}"read -p "Please choose an option (1/2/3): " choicecase $choice in1) install_mysql ;;2) uninstall_mysql ;;3) exit 0 ;;*) echo -e "${RED}Invalid option, please try again.${NC}" && show_menu ;;esac
}# 主函数
main() {show_menu
}# 执行主函数
main

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四、脚本说明

• 日志记录：脚本中的所有操作都会记录到/var/log/mysql_install.log文件中，方便后续排查问题。
• 错误处理：如果某个步骤失败，脚本会立即停止并输出错误信息。
• 用户界面：脚本提供了一个简单的用户界面，用户可以选择安装或卸载MySQL。
• 卸载功能：卸载功能会彻底删除MySQL及其相关文件，确保系统干净。

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五、使用说明

1. 安装MySQL：

   • 运行脚本后选择1，脚本会自动下载并安装MySQL，设置root密码。

2. 卸载MySQL：

   • 运行脚本后选择2，脚本会卸载MySQL并删除所有相关文件和配置。

3. 退出脚本：

   • 运行脚本后选择3，脚本会直接退出。

代码仓库地址：https://gitee.com/lv-tinghu/linux-script.git