keepalived在Centos6.5下安装配置

wcdz

　　最近公司需要使用keepalived实现主备切换，所以就安装研究一段时间；发现网上很多教程都没有很多解决我的需求，在这里写出；请多指导。

环境：centos 6.5 keepalived-1.2.16.tar.gz
　　下载：
wget http://www.keepalived.org/software/keepalived-1.2.16.tar.gz
　　安装：我这里使用默认安装,不添加配置参数

前置条件：yum install -y gcc openssl-devel popt-devel

安装keepalived：
tar zxvf keepalived-1.2.7.tar.gz
cd keepalived-1.2.7

./configure
make && make install
cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
chmod +x /etc/init.d/keepalived
chkconfig --add keepalived
chkconfig keepalived on
mkdir /etc/keepalived
ln -s /usr/local/sbin/keepalived /usr/sbin/

　　配置keepalived：

对于很多新手不知道如何配置的问题，我这里给出详细配置过程；

配置文件路径： /etc/keepalived/keepalived.conf #需要手动建立

配置文件内容：
! Configuration file for keepalived

global_defs {
notification_email {
hejinzhen@linked-video.com
}
notification_email_from hejinzhen@linked-video.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
#监控服务.NGINX mysql等
vrrp_script chk_nginx {
script "/root/hejzh/check_nginx.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER  #主从设置 BACKUP
interface em1  #网卡名
virtual_router_id 51
mcast_src_ip 192.168.1.151 #本机ip
priority 100  #从机小于主机
advert_int 1
authentication {
auth_type PASS
auth_pass hejzh
}
virtual_ipaddress {
192.168.1.245
#VIP 的IP
}
track_script {
chk_nginx  #检测脚本
}
notify_master "/root/hejzh/test_start.sh" #需求核心内容，当切换主态执行此脚本，必须是双引号
notify_backup "/root/hejzh/test_stop.sh"  当切换到备态执行此脚本
notify_fault "/root/hejzh/realserver.sh stop"
}
virtual_server 192.168.1.245 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 192.168.1.168 80 {
weight 3
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.1.151 80 {
weight 3
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}

　　配置文件解释在这就不给出了，请官网说明；
　　日志配置说明：

路径： /etc/sysconfig/keepalived  

内容：
KEEPALIVED_OPTIONS=”-D -d -S 0”

参数说明：

-D 输出详细日志信息
-d 导入配置文件信息
-S 0 日志使用local.* 输出

为了输出日志还必须在/etc/rsyslog.conf中添加：
# keepalived -S 0  
local0.*                                                /var/log/keepalived.log

重启rsyslog服务

service rsyslog restart
　　至此关于keepalived配置已经结束，下面贴出相关脚本

check_nginx.sh
#!/bin/bash
check_nginx=ps -C nginx --no-header | wc -l
check_redis=ps -C redis --no-header | wc -l

check_keepalived=`ps -C keepalived --no-header | wc -l`
if [ $check_nginx -eq 0 ]|| [ $check_redis -eq 0 ]||[ $check_heart -ne 0 ];then
if [ $check_keepalived -ne 0 ];then
killall -TERM keepalived
else
echo "keepalived is stoped"
fi
else
if [ $keepalivedcheck -eq 0 ];then
/etc/init.d/keepalived start
else
echo "keepalived is running"
fi
fi
sleep 5
**test_start.sh**
#!/bin/bash
echo `date`':start' >> /root/hejzh/log
/root/hejzh/realserver.sh start >> /root/hejzh/log
redis-cli -h 192.168.1.245  -p 6379 -n 15 set active "192.168.1.168"
echo `date`':end' >> /root/hejzh/log

　　test_stop.sh
#!/bin/bash
echo date‘:start’ >> /root/hejzh/log_stop
/root/hejzh/realserver.sh stop
redis-cli -h 192.168.1.245  -p 6379 -n 15 set backup “192.168.1.151”
echo date‘:stop’ >> /root/hejzh/log_stop
　　realserver.sh
#!/bin/bash
#description: Config realserver

VIP=192.168.140.254
nic=p4p1
/etc/rc.d/init.d/functions
case "$1" in
start)
/sbin/ifconfig $nic:0 $VIP netmask 255.255.255.255 broadcast $VIP
/sbin/route add -host $VIP dev $nic: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)
/sbin/ifconfig $nic:0 down
/sbin/route del $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

　　最后是nginx安装说明：
tar zxvf  nginx-1.2.5.tar.gz
cd nginx-1.2.5

yum install -y pcre-devel openssl
./configure --prefix=/usr/local/nginx
make && make install

　　启动keepalived：
service keepalived start

启动日志：



版权声明：本文为博主原创文章，未经博主允许不得转载。