如何编写一个高效的服务器负载均衡FTP备份脚本？

服务器负载均衡FTP备份脚本

一、环境准备

1 安装必要软件

1.1.1 安装Keepalived和IPVSAdm

下载软件

    wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz
    wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz

安装Keepalived

    tar -xzf keepalived-1.2.7.tar.gz
    cd keepalived-1.2.7
    ./configure
    make && make install

配置Keepalived

    cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
    cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
    mkdir /etc/keepalived
    cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
    cp /usr/local/sbin/keepalived /usr/sbin

启动Keepalived

    service keepalived start

安装IPVSAdm

    tar -xzf ipvsadm-1.24.tar.gz
    cd ipvsadm-1.24
    make && make install

验证安装

    ipvsadm --help

2 配置FTP服务器

安装vsftpd

    yum install vsftpd -y

配置vsftpd

    # 编辑配置文件
    vim /etc/vsftpd/vsftpd.conf
    # 修改以下内容
    anonymous_enable=NO
    local_enable=YES
    write_enable=YES
    chroot_local_user=YES
    allow_writeable_chroot=YES

启动并设置开机自启

    service vsftpd start
    chkconfig vsftpd on

二、负载均衡配置

2.1 Keepalived配置文件（/etc/keepalived/keepalived.conf）

global_defs {
    router_id LVS_DEVEL
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.99.0.145
    }
    track_script {
        chk_ftp
    }
}
virtual_server 10.99.0.145 21 {
    delay_loop 6
    lb_algo wlc
    lb_kind DR
    persistence_timeout 50
    protocol TCP
    real_server 10.99.0.246 21 {
        weight 1
        MISC_CHECK {
            misc_path "/usr/local/bin/check_ftpget.pl -H 10.99.0.246 -u ftpuser -p password"
            misc_timeout 10
        }
    }
    real_server 10.99.0.247 21 {
        weight 1
        MISC_CHECK {
            misc_path "/usr/local/bin/check_ftpget.pl -H 10.99.0.247 -u ftpuser -p password"
            misc_timeout 10
        }
    }
}

>创建健康检查脚本 (/usr/local/bin/check_ftpget.pl)

#!/usr/bin/perl
use strict;
use Net::FTP;
my $host = shift @ARGV;
my $user = shift @ARGV;
my $pass = shift @ARGV;
my $ftp = Net::FTP->new($host) or die "Cannot connect to $host: $@";
$ftp->login($user, $pass) or die "Cannot login ", $ftp->message;
my $ret = $ftp->list;
$ftp->quit;
if ($ret) {
    exit(0); # Success
} else {
    exit(1); # Failure
}

2 IPVSAdm配置及验证

添加FTP服务到LVS中
ipvsadm -A -t 10.99.0.145:21 -s rr
ipvsadm -a -t 10.99.0.145:21 -r 10.99.0.246:21 -m wlc -w 1
ipvsadm -a -t 10.99.0.145:21 -r 10.99.0.247:21 -m wlc -w 1

三、FTP备份脚本配置

3.1 创建备份脚本 (/usr/local/bin/ftpbackup.sh)

#!/bin/bash
backup 4738 web site;
TARFILE="/var/www/4738.com_web_$(date +%Y%m%d).tar.gz"
ftpuser="ftpuser"
ftppassword="ftppassword"
ftpserver="8.8.8.8" #FTP服务器的IP地址
ftpdir="/4738.com" #备份到FTP服务器的目录；
tar -czvf $TARFILE --exclude=uploads /var/www/4738
ftp -n <<EOF
open $ftpserver
user $ftpuser $ftppassword
binary
cd $ftpdir
lcd /var/www
prompt
put $TARFILE
close
bye
EOF

3.2 添加脚本到计划任务 (crontab -e)

每天凌晨2点执行备份脚本
0 2 * * * /usr/local/bin/ftpbackup.sh

四、测试与监控

1 测试备份脚本手动执行

/usr/local/bin/ftpbackup.sh

4.2 查看Keepalived状态和日志

service keepalived status
tail -f /var/log/keepalived.log

到此，以上就是小编对于“服务器负载均衡ftp备份脚本”的问题就介绍到这了，希望介绍的几点解答对大家有用，有任何问题和不懂的，欢迎各位朋友在评论区讨论，给我留言。