安装:
PS:下载地址：http://www.keepalived.org/download.html
//安装所需软件包 yum install -y openssl openssl-devel //下载 wget http://www.keepalived.org/software/keepalived-1.2.18.tar.gz //解压、编译、安装 tar -zxvf keepalived-1.2.18.tar.gz -C /usr/local/ cd keepalived-1.2.18/ && ./configure --prefix=/usr/local/keepalived make && make install //将keepalived安装成Linux系统服务，因为没有使用keepalived的默认安装路径（默认路径：/usr/local）,安装完成之后，需要做一些修改工作 //首先创建文件夹，将keepalived配置文件进行复制： mkdir /etc/keepalived cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ //然后复制keepalived脚本文件： cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ ln -s /usr/local/sbin/keepalived /usr/sbin/ ln -s /usr/local/keepalived/sbin/keepalived /sbin/ //可以设置开机启动：chkconfig keepalived on，到此我们安装完毕! chkconfig keepalived on |
3、Keepalived配置
PS:修改keepalived.conf配置文件
vim /etc/keepalived/keepalived.conf |
! Configuration File for keepalived
global_defs {
router_id bhz79 ##标识节点的字符串，通常为hostname
}
vrrp_script chk_haproxy {
script "/etc/keepalived/haproxy_check.sh" ##执行脚本位置
interval 2 ##检测时间间隔
weight -20 ##如果条件成立则权重减20
}
vrrp_instance VI_1 {
state MASTER ## 主节点为MASTER，备份节点为BACKUP
interface eth0 ## 绑定虚拟IP的网络接口（网卡），与本机IP地址所在的网络接口相同（我这里是eth0）
virtual_router_id 79 ## 虚拟路由ID号（主备节点一定要相同）
mcast_src_ip 192.168.11.79 ## 本机ip地址
priority 100 ##优先级配置（0-254的值）
nopreempt
advert_int 1 ## 组播信息发送间隔，俩个节点必须配置一致，默认1s
authentication { ## 认证匹配
auth_type PASS
auth_pass bhz
}
track_script {
chk_haproxy
}
virtual_ipaddress {
192.168.11.70 ## 虚拟ip，可以指定多个
}
}
PS: 80节点（backup）配置如下
! Configuration File for keepalived
global_defs { router_id bhz80 ##标识节点的字符串，通常为hostname
}
vrrp_script chk_haproxy { script "/etc/keepalived/haproxy_check.sh" ##执行脚本位置 interval 2 ##检测时间间隔 weight -20 ##如果条件成立则权重减20 }
vrrp_instance VI_1 { state BACKUP ## 主节点为MASTER，备份节点为BACKUP interface eno16777736 ## 绑定虚拟IP的网络接口（网卡），与本机IP地址所在的网络接口相同（我这里是eno16777736） virtual_router_id 79 ## 虚拟路由ID号（主备节点一定要相同） mcast_src_ip 192.168.11.80 ## 本机ip地址 priority 90 ##优先级配置（0-254的值） nopreempt advert_int 1 ## 组播信息发送间隔，俩个节点必须配置一致，默认1s authentication { ## 认证匹配 auth_type PASS auth_pass bhz }
track_script { chk_haproxy }
virtual_ipaddress { 192.168.1.70 ## 虚拟ip，可以指定多个 } } |
4、执行脚本编写
PS:添加文件位置为/etc/keepalived/haproxy_check.sh（79、80两个节点文件内容一致即可）
#!/bin/bash COUNT=`ps -C haproxy --no-header |wc -l` if [ $COUNT -eq 0 ];then /usr/local/haproxy/sbin/haproxy -f /etc/haproxy/haproxy.cfg sleep 2 if [ `ps -C haproxy --no-header |wc -l` -eq 0 ];then killall keepalived fi fi |
5、执行脚本赋权
PS:haproxy_check.sh脚本授权,赋予可执行权限.
chmod +x /etc/keepalived/haproxy_check.sh |
6、启动keepalived
PS:当我们启动俩个haproxy节点以后，我们可以启动keepalived服务程序：
//启动两台机器的keepalived service keepalived start | stop | status | restart //查看状态 ps -ef | grep haproxy ps -ef | grep keepalived |
