lvs+keepalived+vsftp配置FTP服务器负载均衡

LVS+Keepalive 实现服务器的负载均衡高可用
一、安装
两台机器的安装是一样的，这里只记录一遍。
1. 下载LVS+Keepalive 所需安装包
http://www.keepalived.org/software/keepalived-1.2.7.tar.gz
http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz
http://down1.chinaunix.net/distfiles/linux-2.6.18.tar.bz2
http://down1.chinaunix.net/distfiles/linux-2.6.32.tar.bz2
2. 安装所需环境
[root@ZH-LVS01 ~]# yum -y install glibc* gcc* cc*

[root@ZH-LVS01 ~]# yum -y install openssl-devel
[root@ZH-LVS01 ~]# yum -y install kernel-devel

3. 安装keepalive
[root@ZH-LVS01 ~]# tar -xzf keepalived-1.2.7.tar.gz
[root@ZH-LVS01 ~]# cd keepalived-1.2.7
[root@ZH-LVS01 keepalived-1.2.7]# ./configure

编译时出现以下问题原因是未安装popt的开发包

解决：

yum install popt-devel
安装好popt的开发包。

[root@ZH-LVS01 keepalived-1.2.7]# make && make install
[root@ZH-LVS01 keepalived-1.2.7]# keepalived --help #查看keepavlied的帮助信息同时也证明了keepalive已经安装成功

[root@ZH-LVS01 ~]# find / -name keepalived #查看keepalived的位置

[root@ZH-LVS01 ~]# cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
[root@ZH-LVS01 ~]# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
[root@ZH-LVS01 ~]# mkdir /etc/keepalived
[root@ZH-LVS01 ~]# cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
[root@ZH-LVS01 ~]# cp /usr/local/sbin/keepalived /usr/sbin/

[root@ZH-LVS01 ~]# service keepalived start
启动 keepalived：
[root@ZH-LVS01 ~]# service keepalived stop
停止 keepalived： [确定]
[root@ZH-LVS01 ~]# service keepalived start
启动 keepalived： [确定]
[root@ZH-LVS01 ~]#
4. 安装ipvsadm LVS管理工具
4.1 检查kernel是否已经支持LVS的IPVS模块。
[root@ZH-LVS01 ~]# modprobe -l |grep ipvs

4.2 在安装ipvsadm之前应该做一下内核比对，/usr/local/kernels/ 下面的内核版本要和linux所使用的内核版本一样，然后做个链接。

4.3 解压并安装ipvsadm管理软件
[root@ZH-LVS01 ~]# tar -xzf ipvsadm-1.24.tar.gz
[root@ZH-LVS01 ~]# cd ipvsadm-1.24
[root@ZH-LVS01 ipvsadm-1.24]# make && make install
[root@ZH-LVS01 ipvsadm-1.24]# ipvsadm --help #看到帮助提示，表明IPVS已经安装成功。[root@ZH-LVS01 ipvsadm-1.24]# cd
[root@ZH-LVS01 ~]# find / -name ipvsadm #查看ipvsadm软件安装的位置。

二、 配置
1.
[root@ZH-LVS01 ~]# cd /etc/keepalived/
[root@ZH-LVS01 keepalived]# cp keepalived.conf keepalived.conf.bak
[root@ZH-LVS01 keepalived]# vim keepalived.conf2. 配置LVS01为Real Server，通过创建脚本的方式来实现。

 1 ! Configuration File for keepalived
 2 
 3 global_defs {
 4    notification_email {
 5      acassen@firewall.loc
 6      failover@firewall.loc
 7      sysadmin@firewall.loc
 8    }
 9    notification_email_from Alexandre.Cassen@firewall.loc
10    smtp_server 192.168.200.1
11    smtp_connect_timeout 30
12    router_id LVS_DEVEL
13 }
14 vrrp_script chk_tomcat  
15 {  
16      script "/data/ha/scripts/ftp_check.sh"  
17      interval 2   
18      timeout 2   
19      fall 3   
20 }
21 
22 
23 vrrp_instance VI_1 {
24     state MASTER
25     interface eth0
26     virtual_router_id 202
27     priority 99
28     advert_int 1
29     authentication {
30         auth_type PASS
31         auth_pass 1111
32     }
33     virtual_ipaddress {
34     10.143.92.202
35     }
36 track_script {   
37          chk_tomcat  
38     } 
39 }
40 
41 virtual_server 10.143.92.202 80 { #此处端口不能写21哦，不然起来后会有问题
42     delay_loop 3
43     lb_algo wlc  
44     lb_kind DR 
45     nat_mask 255.255.255.255
46     persistence_timeout 50
47     protocol TCP 
48 
49 
50     real_server 10.143.92.115 21 {
51         weight 1
52     MISC_CHECK {
53       misc_path "/usr/local/bin/check_ftpget.pl -H 10.143.92.115 -u dev -p dev"
54       misc_timeout 10
55       }
56         weight 1 
57         TCP_CHECK {
58         　　connect_timeout 3
59         　　nb_get_retry 3
60         　　delay_before_retry 3
61         }  
62         }
63     
64     real_server 10.143.82.10 21 {
65         weight 1
66         MISC_CHECK {
67       misc_path "/usr/local/bin/check_ftpget.pl -H 10.143.92.116 -u dev -p dev"
68       misc_timeout 10
69       }   
70         weight 1 
71         TCP_CHECK {
72         　　connect_timeout 3
73         　　nb_get_retry 3
74         　　delay_before_retry 3
75         }   
76         }
77 }

keepalived.conf