MySQL数据库备份Shell脚本

此脚本将远程主机或者本地主机上的数据库的数据备份到本地。

备份MySQL数据库除了information_schema、performance_schema、mysql自带库的其他生产库。

备份时将MySQL数据库中的每一个库都进行备份（穷举），生成一个包含数据结构和数据的备份文件和一个仅包含数据结构的备份文件。

通常此脚本将结合crontab一起使用，crontab的使用方法已经在脚本中列出。

允许用户修改的变量如下：

mysql_host=127.0.0.1                                         # 主机地址mysql_port=3306                                            # 主机端口号mysql_username=dev                                              # 备份时使用的用户名mysql_password=dev                                              # 备份时使用的用户名的密码mysql_basedir=/usr/local/mysql                     # mysqlbase目录，如果是自定义安装的mysql，则修改此处，使用软件包安装的mysql则无需修改此处save_old_backups_for_days=5                             # 保存备份文件的天数mysql_backup_dir=/data/backup/db/mysql     # mysql备份路径

脚本内容如下：

#!/usr/bin/env bash# Function description:# Backup MySQL databases for each, backup schema and schema with data in one action.# Usage:# bash BackupMysqlByDate.sh# Birth Time:# 2016-06-24 17:44:43.895515929 +0800# Author:# Open Source Software written by 'Guodong Ding '# Blog: http://dgd2010.blog.51cto.com/# Github: https://github.com/DingGuodong# Others:# crontabs -- configuration and scripts for running periodical jobs# SHELL=/bin/bash# PATH=/sbin:/bin:/usr/sbin:/usr/bin# MAILTO=root# HOME=/# For details see man 4 crontabs# Example of job definition:# .---------------- minute (0 - 59)# |  .------------- hour (0 - 23)# |  |  .---------- day of month (1 - 31)# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat# |  |  |  |  |# *  *  *  *  * user-name command to be executed# m h  dom mon dow   command# execute on 11:59 per sunday# 59 11 * * */0 /path/to/BackupMysqlByDate.sh >/tmp/log_backup_mysql_$(date +"\%Y\%m\%d\%H\%M\%S").log# or# execute on 23:59 per day# 59 23 * * * /path/to/BackupMysqlByDate.sh >/tmp/log_backup_mysql_$(date +"\%Y\%m\%d\%H\%M\%S").logUSER="`id -un`"LOGNAME="$USER"if [ $UID -ne 0 ]; then    echo "WARNING: Running as a non-root user, \"$LOGNAME\". Functionality may be unavailable. Only root can use some commands or options"fiold_PATH=$PATHdeclare -x PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"mysql_host=127.0.0.1mysql_port=3306mysql_username=devmysql_password=devmysql_basedir=/usr/local/mysqlsave_old_backups_for_days=5mysql_bin_mysql=${mysql_basedir}/bin/mysqlmysql_bin_dump=${mysql_basedir}/bin/mysqldumpmysql_backup_dir=/data/backup/db/mysqldate_format_type_dir=$(date +%Y-%m-%d)date_format_type_file=$(date +%Y%m%d%H%M%S)echo "--------------------------------"echo "=> do backup scheduler start at $(date +%Y%m%d%H%M%S)"# TODO, check user privileges# check user if have 'RELOAD,EVENT' privileges,etc# backup role# GRANT ALTER,ALTER ROUTINE,CREATE,CREATE ROUTINE,CREATE TEMPORARY TABLES,CREATE VIEW,DELETE,DROP,EXECUTE,INDEX,INSERT,LOCK TABLES,SELECT,UPDATE,SHOW VIEW,RELOAD,EVENT ON *.* TO 'dev'@"%";# FLUSH PRIVILEGES;[ -d ${mysql_basedir} ] && mysql_datadir=${mysql_basedir}/data || mysql_datadir=/var/lib/mysql[ -x ${mysql_bin_mysql} ] || mysql_bin_mysql=mysql[ -x ${mysql_bin_dump} ] || mysql_bin_dump=mysqldump[ -d ${mysql_backup_dir}/${date_format_type_dir} ] || mkdir -p ${mysql_backup_dir}/${date_format_type_dir}mysql_databases_list=""if [ -d ${mysql_datadir} ]; then    mysql_databases_list=`ls -p ${mysql_datadir} | grep / |tr -d /`else    mysql_databases_list=$(${mysql_bin_mysql} -h${mysql_host} -P${mysql_port} -u${mysql_username} -p${mysql_password}\        -e "show databases;" |& grep -Eiv '(^database$|information_schema|performance_schema|^mysql$)')fisaved_IFS=$IFSIFS=' '$'\t'$'\n'for mysql_database in ${mysql_databases_list};do    ${mysql_bin_dump} --host=${mysql_host} --port=${mysql_port} --user=${mysql_username} --password=${mysql_password}\        --routines --events --triggers --single-transaction --flush-logs \        --ignore-table=mysql.event --databases ${mysql_database} |& \        gzip > ${mysql_backup_dir}/${date_format_type_dir}/${mysql_database}-backup-${date_format_type_file}.sql.gz    [ $? -eq 0 ] && echo "${mysql_database} backup successfully! " || \        echo "${mysql_database} backup failed! "    /bin/sleep 2    ${mysql_bin_dump} --host=${mysql_host} --port=${mysql_port} --user=${mysql_username} --password=${mysql_password}\         --routines --events --triggers --single-transaction --flush-logs \         --ignore-table=mysql.event --databases ${mysql_database} --no-data |& \         gzip > ${mysql_backup_dir}/${date_format_type_dir}/${mysql_database}-backup-${date_format_type_file}_schema.sql.gz    [ $? -eq 0 ] && echo "${mysql_database} schema backup successfully! " || \        echo "${mysql_database} schema backup failed! "    /bin/sleep 2doneIFS=${saved_IFS}save_days=${save_old_backups_for_days:-10}need_clean=$(find ${mysql_backup_dir} -mtime +${save_days} -exec ls '{}' \;)    if [ ! -z ${need_clean} ]; then        find ${mysql_backup_dir} -mtime +${save_days} -exec rm -rf '{}' \;        echo "$need_clean have been cleaned! "    else        echo "nothing can be cleaned, skipped! "    fiecho "=> do backup scheduler finished at $(date +%Y%m%d%H%M%S)"echo -e "\n\n\n"declare -x PATH=${old_PATH}

tag:mysqldump,备份MySQL数据库,MySQL数据库备份,mysql备份,mysql备份脚本

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