linux下lvs+keepalived安装配置

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1crazygorilla 2018-09-04 14:18:49 ©著作权

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keepalived主机：192.168.174.129 keepalived备机：192.168.174.130 realserver1:192.168.174.128（nginx服务器，首页为hello world） realserver2:192.168.174.133（nginx服务器，首页为nginx默认首页） VIP：192.168.174.222 LVS模式：DR 防火墙iptables处于关闭状态，selinux为disabled 安装lvs：可以直接使用本地yum安装

yum -y install ipvsadm

安装keepalived：下载keepalived源码安装包并解压进入keepalived解压目录，执行

./configure --prefix=/usr/local/keepalived

编译配置完成后，执行make && make install 拷贝keepalived启动文件到/etc/init.d/下，网上教程有的从安装目录下拷贝过来的，我在安装目录下没有找到相关文件执行,对于这两步不太了解

cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

新建文件夹/etc/keepalived

mkdir /etc/keepalived

将keepalived的配置文件拷贝过来，keepalived启动时会从/etc/keepalived目录下查找keepalived.conf配置文件，如果没有找到则使用默认的配置。

cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

以上操作在keepalived主机和从机上皆操作修改主机配置文件修改备机配置文件主机和备机配置文件只有router_id和vrrp_instance的state和priority不同修改/etc/hosts文件，将两台realserver加入进来打开主机和备机的路由交换功能

echo 1 >/proc/sys/net/ipv4/ip_forward

启动主机和备机上的keepalived服务

service keepalived start

查看虚拟ip状态在两台realserver上建立脚本文件，每台一个，内容一样，主要作用是绑定虚拟ip到环回接口执行脚本/opt/script/lvs_real.sh start 查看ip状态注意lo:0，绑定成功在本地浏览器访问虚拟ip192.168.174.222，成功查看主机上的虚拟ip状态在主机上停掉keepalived主机的keepalived服务