定时备份mysql数据库的shell脚本

#!/bin/bash

now=`date "+%Y-%m-%d_%H:%M:%S" `
echo "=============================$now================================="
echo "begin to backup mysql at : $now"


mysqlDumpurl=$(which mysqldump)
mysqlUrl=$(which mysql)
if [ -n $mysqlDumpurl] | [ -n mysqlUrl ] ;then
    echo "cant‘t find mysql application" >&2
    exit 2
fi

username="root"
dbName=""
mysql_host="localhost"
mysql_port="3306"
password="123456"
back_url="/bak/back_$now.sql"

while getopts h:P:u:p:f:n: opt ;do
    case "$opt" in
    h) mysql_host=$OPTARG ;;
    n) dbName=$OPTARG ;;
    P) mysql_port=$OPTARG ;;
    u) username=$OPTARG ;;
    p) password=$OPTARG ;;
    f) fileUrl=$OPTARG
    if [ -d $fileUrl ] ;then
        if [[ $fileUrl == */ ]]; then
            back_url="$fileUrlback_$now.sql"
        else
            back_url="$fileUrl/back_$now.sql"
        fi
    else
        echo "$fileUrl is not a directory" >&2
        exit 2
    fi
;;
*) echo "$now error option there is only permmit -h host,-P port -u user,-p password ,-f fileUrl,-n dbName" >&2
exit 2
;;
esac

done


result=""
if [[ -n $dbName ]] ; then
result=$dbName
else
result=$( $mysqlUrl -h$mysql_host -P$mysql_port  -u$username -p$password -e ‘show databases‘ | grep -v ‘Warning\|Database\|information_schema\|performance_schema\|sys\|mysql‘  )
fi

if [ $? -eq 0 ];then
for db in $result ;do
echo "begin to backup database : $db "
$mysqlDumpurl -h$mysql_host -P$mysql_port -u $username -p$password $db >>$back_url
done;

else
echo "$now mysql connection error" >&2
exit 2
fi

end=`date "+%Y-%m-%d_%H:%M:%S" `
echo "end to backup mysql at : $end"


echo "=============================$end================================="

sh /root/mysql_bak/mysqlbak.sh -h 192.168.0.1 -P 3306 -u root -p 123456 -n bz  -f /bak/test 2>>/root/mysql_bak/error.log  1>> /root/mysql_bak/success.log

[root@db-mysql mysql_bak]# crontab -e

30 19 * * *  /root/mysql_bak/mysqlbak.sh -h 192.168.0.1 -P 3306 -u root -p 123456 -n bz  -f /bak/test 2>>/root/mysql_bak/error.log  1>> /root/mysql_bak/success.log

[root@db-mysql mysql_bak]# ll /bak/test/
total 22368
-rw-r--r-- 1 root root  823238 Feb 24 19:04 back_2020-02-24_19:04:48.sql
-rw-r--r-- 1 root root  823238 Feb 24 19:06 back_2020-02-24_19:06:29.sql
-rw-r--r-- 1 root root  823238 Feb 24 19:06 back_2020-02-24_19:06:50.sql
-rw-r--r-- 1 root root  134459 Feb 24 19:07 back_2020-02-24_19:07:29.sql
-rw-r--r-- 1 root root 2833376 Feb 24 19:08 back_2020-02-24_19:08:12.sql
-rw-r--r-- 1 root root 2833376 Feb 24 19:10 back_2020-02-24_19:10:06.sql
-rw-r--r-- 1 root root 2833376 Feb 24 19:12 back_2020-02-24_19:12:01.sql
-rw-r--r-- 1 root root 2833376 Feb 24 19:13 back_2020-02-24_19:13:19.sql
-rw-r--r-- 1 root root 2833376 Feb 24 19:13 back_2020-02-24_19:13:38.sql
-rw-r--r-- 1 root root 2833376 Feb 24 19:14 back_2020-02-24_19:14:20.sql
-rw-r--r-- 1 root root  823242 Feb 24 19:14 back_2020-02-24_19:14:42.sql
-rw-r--r-- 1 root root  823242 Feb 24 19:32 back_2020-02-24_19:32:29.sql
-rw-r--r-- 1 root root  823242 Feb 24 19:36 back_2020-02-24_19:36:01.sql
-rw-r--r-- 1 root root       0 Feb 24 19:45 back_2020-02-24_19:45:03.sql
-rw-r--r-- 1 root root  823238 Feb 24 19:46 back_2020-02-24_19:46:30.sql
-rw-r--r-- 1 root root       0 Feb 24 19:46 back_2020-02-24_19:46:41.sql

[root@db-mysql mysql_bak]# cat success.log
=============================2020-02-24_19:36:01=================================
begin to backup mysql at : 2020-02-24_19:36:01
begin to backup database : bz
end to backup mysql at : 2020-02-24_19:36:01
=============================2020-02-24_19:36:01=================================
=============================2020-02-24_19:45:03=================================
begin to backup mysql at : 2020-02-24_19:45:03
begin to backup database : bz
end to backup mysql at : 2020-02-24_19:45:03
=============================2020-02-24_19:45:03=================================
=============================2020-02-24_19:46:30=================================
begin to backup mysql at : 2020-02-24_19:46:30
begin to backup database : bz
end to backup mysql at : 2020-02-24_19:46:30
=============================2020-02-24_19:46:30=================================
=============================2020-02-24_19:46:41=================================
begin to backup mysql at : 2020-02-24_19:46:41
begin to backup database : bz
end to backup mysql at : 2020-02-24_19:46:41
=============================2020-02-24_19:46:41=================================

[root@db-mysql mysql_bak]# cat error.log
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
-bash: at: command not found
-bash: at: command not found
/bin/sh: root: command not found
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: Got error: 2003: Can‘t connect to MySQL server on ‘192.168.3.147‘ (111) when trying to connect
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: Got error: 1045: Access denied for user ‘root‘@‘localhost‘ (using password: YES) when trying to connect