mysql备份脚本-mysqldump

背景：全库备份

备份流程：

　　1.生成DB列表，将DB名字写入文件

　　2.定义备份函数，结果写入SQL文件

　　3.压缩文件，减少磁盘占用量

　　4.设置保留天数，定期删除n天之前的

　　5.通过for循环读取DB列表文件，依次进行mysqldump

 #!/bin/bash

 PORT=''
 PASSWD='admin'
 SOCKED="/data/socket/mysql${PORT}.sock"
 BACKUP_FILE='/data/mysqlData/backup'
 BACKUP_SAVE_DAYS=''

 CMD1='show databases;'
 Time=`date +%Y%m%d_%H%M%S`
 EVERY_DAY_BACKUP_DIR="${BACKUP_FILE}/${Time}_backup"
 DB_LIST="${EVERY_DAY_BACKUP_DIR}/db_list.txt"

 # function : check_db ===> db_list.txt
 check_db()
 {
     mkdir -pv ${EVERY_DAY_BACKUP_DIR} >>/dev/null
     touch ${DB_LIST} && chmod  ${DB_LIST} && chown -R mysql.mysql ${DB_LIST}
     /usr/local/mysql/bin/mysql -uadmin -p${PASSWD} -S ${SOCKED} -NBe"${CMD1}"|grep -v 'information_schema\|performance_schema\|mysql'>${DB_LIST}

 }

 # function : backup_db ===>xx.sql
 backup_db()
 {
     /usr/local/mysql/bin/mysqldump -uadmin -p${PASSWD} -S ${SOCKED} $ >> ${EVERY_DAY_BACKUP_DIR}/$.sql
 }

 # function : tar_file ===>xx.tar.gz
 tar_file()
 {
     cd ${BACKUP_FILE}
     tar -cf `date +%Y%m%d_%H%M%S`.tar.gz ${Time}_backup
     rm -fr ${Time}_backup
 }

 # function : delete xx.tar.gz : <before n days>
 delete_file()
 {
     cd ${BACKUP_FILE}
     /usr/bin/find -name "*.tar.gz" -mtime +${BACKUP_SAVE_DAYS} -exec rm {} \;
 }

 # main_process
 #
 check_db

 #
 cat ${DB_LIST}| while read line
 do
     oldIFS=${IFS}
     backup_db ${line}
     IFS=${oldIFS}
     sleep
 done

 #
 tar_file

 #  delete xx.tar.gz : before n days

 delete_file ${BACKUP_SAVE_DAYS}