Centos 离线部署keepalived高可用

服务器资源准备

MASTER：192.168.10.1 #主服务
BACKUP：192.168.10.2 #备用服务
VIP1：192.168.10.10 #虚拟VIP1
VIP2：192.168.10.11 #虚拟VIP2（一般可以只配置一个虚拟VIP）

提示：以下安装两台服务器除配置文件内容不同外，安装步骤一律相同。

1.下载软件

Tomcat tomcat官网

keepalived 官网

2.安装依赖

yum -y install gcc
yum -y install openssl-devel
yum -y install libnl libnl-devel
yum -y install libnfnetlink-devel #ipv6相关
yum -y install net-tools

帮助：yum离线安装

3.上传压缩包到app文件夹

cd /app
tar -zxf keepalived-2.2.4.tar.gz
cd /app/keepalived-2.2.4

4.安装

./configure
make
make install #警告忽略

5.验证

ll /usr/local/etc/keepalived/keepalived.conf
ll /usr/local/etc/sysconfig/keepalived
ll /usr/local/sbin/keepalived

6.初始化

mkdir /etc/keepalived
cp /app/keepalived-2.2.4/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp /app/keepalived-2.2.4/keepalived/etc/init.d/keepalived  /etc/rc.d/init.d/
cp /app/keepalived-2.2.4/keepalived/etc/sysconfig/keepalived  /etc/sysconfig/
cp /usr/local/sbin/keepalived  /usr/sbin/

7.配置

cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bk
echo '' > /etc/keepalived/keepalived.conf

#查看网卡名称
ip add

vi /etc/keepalived/keepalived.conf

-----------------------192.168.10.1------------------------------
! Configuration File for keepalived

global_defs {
   router_id LVS_DEVEL_01
}

vrrp_instance VI_1 {
    state MASTER
    interface enp0s8 #网卡名称
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.10.10
        192.168.10.11
    }
}
-----------------------192.168.10.2------------------------------
! Configuration File for keepalived

global_defs {
   router_id LVS_DEVEL_02
}

vrrp_instance VI_1 {
    state BACKUP
    interface enp0s8 #网卡名称
    virtual_router_id 51
    priority 50
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.10.10
        192.168.10.11
    }
}

8.验证服务

=========操作=========
service keepalived stop //停止服务
service keepalived status //查看服务状态
service keepalived start //启动服务

9.查看ip是否漂移

ip addr|grep 192.168.10.10

10.两台服务器各自解压部署tomcat

　　停止192.168.10.1上的keepalived查看vip是否漂移到192.168.10.2上。

　　启动192.168.10.1上的keepalived服务器，查看VIP是否漂移回到192.168.10.1上。

　　访问192.168.10.10:8080或者192.168.10.11:8080查看tomcat服务是否正常可以访问。