Shell 腳本 調用Mysql 客戶端定時導出數據

在mysql 服務端可以很方便的導出到文件，也有靈活的選擇。 如果需要導出的文件到其他服務器，不在mysql服務器上。 有兩個選擇：

1. 在mysql 服務器上導出文件，通過sftp上傳至目標機器
2. 在目標機器安裝mysql 客戶端，通過shell 腳本來導出數據 （此篇關注點）

驗證環境

Linux 系統：Centos 7

安裝Mysql Client

參考：Installing MySQL on Linux Using RPM Packages from Oracle

Shell 腳本

#!/bin/sh
##############################################################################################################################################
# This script is used to retrieve data from mysql and output it into txt file. Also it will generate md5 file which can be used to verify the integrity.
# Script will make folder named "YYYYMMDD", also the file name will follow the pattern A/I{tableName}YYYYMMDD{6 sequence number} such as I0100320170303000001
##############################################################################################################################################

##############Global Configuration begins ####################
# Root folder where the data will be stored
BEE_ROOT_GLOBAL=/data/b2bbuyerdata
MYSQL_HOST=192.168.1.90
MYSQL_PORT=3306
MYSQL_USERNAME=username
MYSQL_PASSWD=password
##############Global Configuration ends ####################

# exportAndMD5Sum querySql tableName. Output the query result into tableNameYYYYMMDD000001.txt and tableNameYYYYMMDD000001.md5
# .md5 file is used to verify data integrity. 
exportAndMD5Sum()
{
    if [ "$#" != 2 ];then
        echo  "Usage: exportAndMD5Sum querySql tableName";
        exit;
    fi
    # Starting export data using mysql command
    SQL=$1;
    tableName=$2;
    TIMESTAMP=`date +%Y%m%d`
    BEE_ROOT=${BEE_ROOT_GLOBAL}/${TIMESTAMP}

    _tmpFile=${BEE_ROOT}/${tableName}${TIMESTAMP}000001.tmp;
    destFile=${BEE_ROOT}/${tableName}${TIMESTAMP}000001.AVL;
    destMD5File=${BEE_ROOT}/${tableName}${TIMESTAMP}000001.CHK;

    # Create Folder
    [ ! -d "$BEE_ROOT" ] &&  mkdir "$BEE_ROOT"

    # Mysql command to output data into file
    `mysql -h ${MYSQL_HOST} -p${MYSQL_PORT} -u ${MYSQL_USERNAME} --password=${MYSQL_PASSWD} -e "${SQL}" > "${_tmpFile}"`

    # If not empty(has records) change the file name, otherwise remove it.
    if [ -f "$_tmpFile" ] && [ -s "$_tmpFile" ]
        then
            mv ${_tmpFile} ${destFile}
            #`md5sum ${destFile} > ${destMD5File}`
            md5=($(md5sum ${destFile}))
            echo $md5 > ${destMD5File}
        else
            rm ${_tmpFile} 
    fi
}
if [ "$1" = "I" ]; then
    echo "Starting export all data from mysql ............."
    exportAndMD5Sum "SELECT username,country,source,city,email,first_name,last_name,province,status,CAST(is_reveive_email AS UNSIGNED) AS is_reveive_email,created_stamp,last_updated_stamp FROM b2bbuyer.user" "I01001"
    exportAndMD5Sum "select u.username,a.address,a.city,a.company_name,a.country,a.first_name,CAST(a.is_default AS UNSIGNED) AS is_default ,a.last_name,a.province,a.tel_country_code,a.tel_ext,a.tel_no,a.zip_code,a.created_stamp,a.last_updated_stamp from b2bbuyer.user u inner join b2bbuyer.user_delivery_address a where a.user_id=u.id" "I01002"
    exportAndMD5Sum "select u.username,c.email,c.address,c.city,c.company_name,c.contact,c.country,c.fax_country_code,c.fax_ext,c.fax_tel_no,c.main_products,c.province,c.register_no,c.tax_no,c.tel_country_code,c.tel_ext,c.tel_no,c.website from b2bbuyer.user u inner join b2bbuyer.user_company c where c.user_id=u.id" "I01003"
else
    echo "Starting export yesterday's data from mysql ............."
    exportAndMD5Sum "SELECT username,country,source,city,email,first_name,last_name,province,status,CAST(is_reveive_email AS UNSIGNED) AS is_reveive_email,created_stamp,last_updated_stamp FROM b2bbuyer.user where last_updated_stamp < (UNIX_TIMESTAMP(CURDATE())*1000) and last_updated_stamp > ((UNIX_TIMESTAMP(CURDATE())-60*60*24)*1000)" "A01001"
    exportAndMD5Sum "select u.username,a.address,a.city,a.company_name,a.country,a.first_name,CAST(a.is_default AS UNSIGNED) AS is_default ,a.last_name,a.province,a.tel_country_code,a.tel_ext,a.tel_no,a.zip_code,a.created_stamp,a.last_updated_stamp from b2bbuyer.user u inner join b2bbuyer.user_delivery_address a where a.user_id=u.id and a.last_updated_stamp < (UNIX_TIMESTAMP(CURDATE())*1000) and a.last_updated_stamp > ((UNIX_TIMESTAMP(CURDATE())-60*60*24)*1000)" "A01002"
    exportAndMD5Sum "select u.username,c.email,c.address,c.city,c.company_name,c.contact,c.country,c.fax_country_code,c.fax_ext,c.fax_tel_no,c.main_products,c.province,c.register_no,c.tax_no,c.tel_country_code,c.tel_ext,c.tel_no,c.website from b2bbuyer.user u inner join b2bbuyer.user_company c where c.user_id=u.id and c.last_updated_stamp < (UNIX_TIMESTAMP(CURDATE())*1000) and c.last_updated_stamp > ((UNIX_TIMESTAMP(CURDATE())-60*60*24)*1000)" "A01003"
fi

添加cron job

參考cronjob crontab -l
編輯cronjob crontab -e

0 1 * * * /data/scripts/mysql-job.sh A
20 1 * * 0 /data/scripts/mysql-job.sh I

兩個cron job 分別：

1. 每天1點執行
2. 每週日1點20 執行