KeepAlive安装以及简单配置

操作系统：Centos7.3

一.依赖安装

首先安装相关依赖：

yum install -y gcc openssl-devel popt-devel
yum -y install libnl libnl-devel
yum install -y libnfnetlink-devel

基本依赖就安装完毕了，如果还缺少什么依赖在下一步编译的时候会有warning，百度去解决就好了

二.编译安装源码

首先下载源码到指定目录:

cd /usr/local/src
wget http://www.keepalived.org/software/keepalived-1.3.4.tar.gz

然后解压，配置

tar zxvf keepalived-1.3.4.tar.gz 
cd keepalived-1.3.4
./configure --prefix=/usr/local/keepalived

之后编译

make  
make install

注意这一步make之后可能会有warning，一般都是缺少依赖造成的，把warning关键字百度一下去yum安装对应依赖就可以了

三.修改配置文件地址

安装完成后，keepalived的默认配置文件地址和我们安装的地址不一样，所以cp过去就可以了

cp ../keepalived-1.3.4/keepalived/etc/init.d/keepalived /etc/init.d/
mkdir /etc/keepalived
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp keepalived-1.3.4/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

之后只要修改/etc/keepalived/ 目录下的keepalived.conf配置文件就可以了

使用service start keepalived启动服务

四.附keepalived简单配置文件

! Configuration File for keepalived

global_defs {
   router_id lb01 #设置本机路由id，做区分的
}

vrrp_instance VI_1 {
    state MASTER #主从标记，仅做标识
    interface eth0 #虚拟路由的网卡名
    virtual_router_id 51 #虚拟路由路由id，想要配置在同一个虚拟ip必须要有相同id
    priority 150 #优先级，优先级最高的自动为主机，主机宕机后按照优先级选择热备从机
    advert_int 1 #主备通讯时间间隔
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
         172.17.0.199 #配置到哪个虚拟ip，这里我是在docker中，所以是这个docker的默认网段的一个ip，主备机这个地方ip要相同
    }
}