LVS+Keepalived高可用群集

一、配置主调度器

1) LVS配置:
[root@localhost~]# vim /etc/stsctl.conf
添加以下参数： net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects= 0
net.ipv4.conf.eth0.send_redirects= 0
[root@localhost~]# sysctl -p
[root@localhost~]# modprobe ip_vs
[root@localhost~]# echo “modprobe ip_vs” > /etc/rc.local
2）安装支持软件
在编译前，必须安装内核开发包kernel-devel openssl-devel popt-devel ipvsadm
[root@localhost~]# yum -y install kernel-devel openssl-devel popt-devel
[root@localhost~]# rpm –ivh /misc/cd/Server/Packages/ipvsadm-1.25-9.e16.i686.rpm
3) 编译安装keepalived
[root@localhost~]# tar zxf keepalived-1.2.2.tar.gz
[root@localhost~]# cd keepalived-1.2.2
[root@localhost~]# ./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.32-131
.0.15.e16.i686
[root@localhost~]# make && make install
4) 使用keepalived 服务
[root@localhost~]# ls -l /etc/init.d/keepalived
-rwxr-xr-x 1 root root 1288 11月 8 16.23 /etc/init.d/keepalived
[root@localhost~]# chkconfig --add keepalived
[root@localhost~]# chkconfig keepalived on

5)配置keepalived文件的全局配置，热备配置等

[root@localhost~]# vim /etc/keepalived/keepalived.conf
a)

b) 服务器池配置

启动keepalived服务

[root@localhost~]# service keepalived restart

二、配置从调度器

1) LVS配置:
[root@localhost~]# vim /etc/stsctl.conf
添加以下参数： net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects= 0
net.ipv4.conf.eth0.send_redirects= 0
[root@localhost~]# sysctl -p
[root@localhost~]# modprobe ip_vs
[root@localhost~]# echo “modprobe ip_vs” > /etc/rc.local
2）安装支持软件
在编译前，必须安装内核开发包kernel-devel openssl-devel popt-devel ipvsadm
[root@localhost~]# yum -y install kernel-devel openssl-devel popt-devel
[root@localhost~]# rpm –ivh /misc/cd/Server/Packages/ipvsadm-1.25-9.e16.i686.rpm
3) 编译安装keepalived
[root@localhost~]# tar zxf keepalived-1.2.2.tar.gz
[root@localhost~]# cd keepalived-1.2.2
[root@localhost~]# ./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.32-131
.0.15.e16.i686
[root@localhost~]# make && make install
4) 使用keepalived 服务
[root@localhost~]# ls -l /etc/init.d/keepalived
-rwxr-xr-x 1 root root 1288 11月 8 16.23 /etc/init.d/keepalived
[root@localhost~]# chkconfig --add keepalived
[root@localhost~]# chkconfig keepalived on

5)配置keepalived文件的全局配置，热备配置等

[root@localhost~]# vim /etc/keepalived/keepalived.conf
启动keepalived服务
[root@localhost~]# service keepalived restart

三、配置web节点服务器 (web1 web2)

1）配置虚拟Ip地址（VIP）漂浮地址

[root@localhost~]# cd /etc/sysconfig/network-scripts/

[root@localhost~]# cp ifcfgh-lo ifcfg-lo:0

[root@localhost~]# ifup lo:0

[root@localhost~]# vim /etc/rc.local

/sbin/route add -host 200.0.0.254 dev lo:0 //添加路由记录

[root@localhost~]# route add -host 200.0.0.254 dev lo:0

2）调整、proc响应参数 sysctl.conf

[root@localhost~]# vim etc/sysctl.conf

添加以下参数： net.ipv4.conf.all.arp_ignore = 1

net.ipv4.conf.all.arp_announce= 2

net.ipv4.conf.default.arp_ignore = 1

net.ipv4.conf.default.arp_announce= 2

net.ipv4.conf.lo.arp_ignore= 1

net.ipv4.conf.lo.arp_announce= 2

[root@localhost~]# sysctl -p

[root@localhost~]# service httpd start

[root@localhost~]# chkconfig httpd on

3)测试LVS群集

[root@localhost~]# ipvsadm -Ln

邮件服务器

注：在调度器上安装sendmail邮件服务器，每当web节点down，up时,都会发送邮件到调度器指定邮箱里。
1）在主调度器上安装sendmail服务

[root@localhost~]# yum -y install sendmail

[root@localhost~]# service sendmail start

[root@localhost~]# chkconfig sendmail on

[root@localhost~]# useradd u1

[root@localhost~]# vim /etc/keepalived/keepalived.conf

[root@localhost~]# vim /etc/resolv.conf

Servicename dns1.beent.com

[root@localhost~]# vim /etc/hosts

127.0.0.1 dns1.benet.com

[root@localhost~]# cat /var/mail/u1 //查看邮件