集群架构图
具体实现
hostA : 192.168.1.21
hostB : 192.168.1.22
hostC : 192.168.1.23
虚拟ip地址: 192.168.1.20
hostA为负载均衡器
hostB和hostC为ftp服务器
转发模式:DR
调度算法:rr
hostA配置
安装ipvsadm:
yum install ipvsadm -y
开启ip转发功能:
vim /etc/sysctl.conf
net.ipv4.ip_forward = 1
sysctl -p
关闭防火墙:
/etc/init.d/iptables stop
配置ipvs(start.sh):
#! /bin/sh
# DR Mode
ipvsadm -C
ipvsadm -A -t 192.168.1.20:21 -s rr -p
ipvsadm -a -t 192.168.1.20:21 -r 192.168.1.22:21 -g
ipvsadm -a -t 192.168.1.20:21 -r 192.168.1.23:21 -g
ipvsadm save
ipvsadm -ln
ifconfig eth0:0 192.168.1.20 netmask 255.255.255.0
hostB配置
配置虚拟ip
[root@hostB test]# cat /etc/init.d/realserver.sh
#!/bin/bash
SNS_VIP=192.168.1.20
. /etc/rc.d/init.d/functions
case "$1" in
start)
ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
/sbin/route add -host $SNS_VIP dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK"
;;
stop)
ifconfig lo:0 down
route del $SNS_VIP >/dev/null 2>&1
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0
[root@hostB test]# sh /etc/init.d/realserver.sh start
SIOCADDRT: File exists
RealServer Start OK
安装ftp
yum install vsftpd -y
修改配置:
为了方便开启匿名用户操作ftp的各种权限。
chmod a+w /var/ftp/pub/ # 开启文件夹写权限
vim /etc/vsftpd/vsftpd.conf
anon_upload_enable=YES
anon_mkdir_write_enable=YES
anon_other_write_enable=YES # 开启匿名用户删除功能
配置selinux:
getsebool -a | grep ftp
setsebool -P allow_ftpd_anon_write 1
setsebool -P allow_ftpd_full_access 1
启动ftp:
/etc/init.d/vsftpd start
配置开机启动:
chkconfig vsftpd on
关闭防火墙:
/etc/init.d/iptables stop
chkconfig iptables off
hostC配置
配置同hostB
测试脚本
#! /usr/bin/env python
#-*- coding:utf-8 -*-
import ftplib,os,time
ftp = ftplib.FTP("192.168.1.20")
ftp.login()
ftp.cwd("/pub")
i = 0
while True :
filename = "ftptest1_%d.txt" % i
print filename
i += 1
with open(filename,"w") as fout :
fout.write(str(time.time()))
myfile = open(filename, 'r')
try :
ftp.storlines('STOR ' + filename, myfile)
except :
ftp.login()
ftp.cwd("/pub")
myfile.close()
os.remove(filename)
time.sleep(10)
关闭防火墙: