nginx keepalived 搭建负载均衡
1下载安装包yum install -y pcre-devel
wget http://www.keepalived.org/software/keepalived-1.2.2.tar.gz
tar zxvf keepalived-1.2.2.tar.gz
cd keepalived-1.2.2
./configure --prefix=/usr/local/keepalived
make&& make install
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
mkdir /etc/keepalived
cd /etc/keepalived/
vim keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
yuhongchun027@163.com
}
notification_email_from keepalived@chtopnet.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
mcast_src_ip 192.168.93.130
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass chtopnet
}
virtual_ipaddress {
192.168.93.132
}
}
service keepalived start
tail /var/log/messages看keepalived是否启动
ip a看vip是否已存在
ip a 来检查
1: lo:mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0:mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:ab:e6:22 brd ff:ff:ff:ff:ff:ff
inet 192.168.93.130/24 brd 192.168.93.255 scope global eth0
inet 192.168.93.132/32 scope global eth0
inet6 fe80::20c:29ff:feab:e622/64 scope link
valid_lft forever preferred_lft forever
3: sit0:mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
很明显已经存在了，
这样主服务器 就配置好了，辅机的配置大致一样，除了配置文件 有少部分的变化，下面贴出辅机的配置文件：
wget http://www.keepalived.org/software/keepalived-1.2.2.tar.gz
#tar zxvf keepalived-1.2.2.tar.gz
#cd keepalived-1.2.2
#./configure --prefix=/usr/local/keepalived
#make
#make install
#cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
#cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
#cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
#mkdir /etc/keepalived
#cd /etc/keepalived/
#vim keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
yuhongchun027@163.com
}
notification_email_from keepalived@chtopnet.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
mcast_src_ip 192.168.93.131
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass chtopnet
}
virtual_ipaddress {
192.168.93.132
}
}
#service keepalived start
很显然vrrp已经启动，我们还可以通过命令：#ip a 来检查
1: lo:mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0:mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:4a:2a:eb brd ff:ff:ff:ff:ff:ff
inet 192.168.93.131/24 brd 192.168.93.255 scope global eth0
inet6 fe80::20c:29ff:fe4a:2aeb/64 scope link
valid_lft forever preferred_lft forever
3: sit0:mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
2 nginx的安装
tar -xzf nginx-1.4.1.tar.gz
cd nginx-1.4.1
sed -i -e 's/1.2.2//g' -e 's/nginx\//TDTWS/g' -e 's/"NGINX"/"TDTWS"/g' src/core/nginx.h
./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_stub_status_module --with-http_ssl_module
make && make install
/usr/local/nginx/sbin/nginx
测试
测试其效果方法很简单，分别在主辅机上建立不同的主页，
然后用客户机上http://192.168.93.132 ，显示nginx主的页面效果130
1）主机nginx down掉后辅机会马上接替提供服务 ，间隔时间几乎无法感觉出来,
我们关闭nginx主
访问http://192.168.93.132 显示 131
可查看naginx从＝》主 后131的变换 #ip a 就可以看到inet 192.168.93.132/32 scope global eth0
1: lo:mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0:mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:4a:2a:eb brd ff:ff:ff:ff:ff:ff
inet 192.168.93.131/24 brd 192.168.93.255 scope global eth0
inet 192.168.93.132/32 scope global eth0
inet6 fe80::20c:29ff:fe4a:2aeb/64 scope link
valid_lft forever preferred_lft forever
3: sit0:mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
2）在开启nginx主服务器(keepalived 开机自动启动)
访问http://192.168.93.132 显示 130
可查看naginx从后131的变换 #ip a
1: lo:mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0:mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:4a:2a:eb brd ff:ff:ff:ff:ff:ff
inet 192.168.93.131/24 brd 192.168.93.255 scope global eth0
inet6 fe80::20c:29ff:fe4a:2aeb/64 scope link
valid_lft forever preferred_lft forever
3: sit0:mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
小结：
vip两台服务器是一样的
搭建时遇到的问题
1gcc没安装
2prce
3./configure: error: the HTTP rewrite module requires the PCRE library.
安装pcre-devel解决问题
yum -y install pcre-deve
4./configure时老是报！
checking openssl/ssl.h usability... no
checking openssl/ssl.h presence... no
checking for openssl/ssl.h... no
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files.
解决：
yum install -y openssl openssl-devel
5keepalived出现configure: error: Popt libraries is required的解决方法
解决方法：
yum install popt-devel
安装好popt的开发包。
重新./configure 即可。
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