Bash shell for backup WordPress and MySQL database

backup-example.sh

#!/bin/bash
 
# Author: wangye
# For more information please visit:
# http://wangye.org/
# 请在使用本脚本前做好测试工作，脚本功能仅供参考，
# 对于可能的潜在问题造成损失，本人不承担责任。
 
MYSQL_USERNAME="mysql-username"
MYSQL_PASSWORD="mysql-password"
 
# 下面这行指示接收备份文件的电子邮件地址
BACKUP_RECEVIER="email-address-recive-backup@example.com"
BACKUP_FILENAME="/var/sample-site" # 需要备份的目录
BACKUP_DBNAME="sample" # 需要备份的数据库名称
BACKUP_PREFIX="backup_" # 备份文件的前缀
 
# 下面一些命令路径可以通过whereis获取
MYSQLDUMP_PATH="/usr/bin" # mysqldump 命令所在的路径
TARCOMPRESSOR_PATH="/bin" # tar 命令所在的路径
RM_PATH="/bin" # rm 命令所在的路径
MUTTMAIL_PATH="/usr/bin" # mutt 命令所在的路径
TEMP_PATH="/tmp" # 临时目录
 
# 产生临时名称形如 backup_20120221 名称
make_backup_name() {
    TEMPNAME=${BACKUP_PREFIX}$(date +"%Y%m%d")
}
 
# 产生临时备份目录
make_backup_dir() {
    make_backup_name
    TEMPDIR=${TEMP_PATH}/$?
    mkdir -m 777 -p $TEMPDIR
}
 
backup_files() {
    ${TARCOMPRESSOR_PATH}/tar -zcvf \
        ${TEMP_PATH}/${TEMPNAME}.tar.gz ${BACKUP_FILENAME}
}
 
backup_databases() {
    local EXPORTDIR=$1
    ${MYSQLDUMP_PATH}/mysqldump -u${MYSQL_USERNAME} \
      -p${MYSQL_PASSWORD} \
      ${BACKUP_DBNAME} >${EXPORTDIR}/${BACKUP_DBNAME}.sql
 
    ${TARCOMPRESSOR_PATH}/tar -zcvf \
      ${TEMP_PATH}/${TEMPNAME}_${BACKUP_DBNAME}.tar.gz ${EXPORTDIR}
}
 
send_byemail() {
    echo "**IMPORTANT BACKUP** Hi! :-)\n\n$(uname -a)"| \
        $MUTTMAIL_PATH/mutt -s "** System Backup$(date +%Y-%m-%d)" \
            -a ${TEMP_PATH}/${TEMPNAME}_${BACKUP_DBNAME}.tar.gz \
             ${TEMP_PATH}/${TEMPNAME}.tar.gz -- \
            ${BACKUP_RECEVIER}
}
 
# 清除产生的临时文件（使用了rm -rf怕怕中，不过目标路径正确就OK啦）
cleanup() {
    $RM_PATH/rm -rf $TEMPDIR
    $RM_PATH/rm -rf ${TEMP_PATH}/${TEMPNAME}_${BACKUP_DBNAME}.tar.gz
    $RM_PATH/rm -rf ${TEMP_PATH}/${TEMPNAME}.tar.gz
}
 
main() {
   make_backup_dir
   backup_databases $TEMPDIR
   backup_files
   send_byemail
   cleanup
}
 
main
 
exit 0