1、 keepalived軟體安裝
yum install keepalived -y
注：/etc/keepalived/keepalived.conf #keepalived服務主配置檔案
/etc/rc.d/init.d/keepalived #服務啟動指令碼
2、配置檔案說明
1-13行表示全域性配置
global_defs
notification_email_from [email protected] #定義傳送郵件的位址
smtp_server 192.168.200.1 #郵箱伺服器
smtp_connect_timeout 30 #定義超時時間
router_id lvs_devel #定義路由標識資訊，相同區域網唯一
} 15-30行 虛擬ip配置 brrp
實驗：keepalived熱備份（雙機熱備）
主keepalived伺服器:192.168.80.180
備keepalived伺服器:192.168.80.105
修改後的配置如下：
主負載均衡伺服器配置
! configuration file for keepalived
global_defs
vrrp_instance vi_1
virtual_ipaddress
}備負載均衡伺服器配置
! configuration file for keepalived
global_defs
vrrp_instance vi_1
virtual_ipaddress
}service keepalived start 啟動keepalived
ip addr show ens32
cat /var/log/messages 用日誌檢視
主：從：
【總結】配置檔案修改
keepalived主備配置檔案區別：
1. router_id 資訊不一致
2. state 狀態描述資訊不一致
3. priority 主備競選優先順序數值不一致
4.你的物理網絡卡名字 一定要先ifconfig看一下 是多少 inte***ce後面就寫多少
到此，keepalived主備部署完成。
-------
環境：主keepalived伺服器：192.168.80.100
從keepalived伺服器: 192.168.80.101
web伺服器:192.168.80.102
192.168.80.103
windows7 :192.168.80.20
主從keepalived伺服器上：
modprobe ip_vs
yum install ipvsadm -y
yum -y install gcc gcc-c++ make popt-devel kernel-devel openssl-devel
tar xf keepalived-1.4.2.tar.gz -c /opt
cd keepalived-1.4.2/
./configure --prefix=/
make && make install
cp keepalived/etc/init.d/keepalived /etc/init.d/ //加入系統管理服務
systemctl enable keepalived
在主伺服器上
vi /etc/keepalived/keepalived.conf
! configuration file for keepalived
global_defs
vrrp_instance vi_1
virtual_ipaddress
}virtual_server 192.168.80.188 80
}real_server 192.168.80.103 80 }}
service keepalived start
ip addr show dev ens32
ipvsadm –ln //檢視lvs虛擬伺服器
cat /var/log/messages
配置從keepalived伺服器：
vi /etc/keepalived/keepalived.conf
! configuration file for keepalived
global_defs
vrrp_instance vi_1
virtual_ipaddress
}virtual_server 192.168.80.188 80
}real_server 192.168.80.103 80 }}
service keepalived start
ipvsadm –ln
驗證熱備結果
配置web節點伺服器
第一台web節點：
第二台web節點：
測試lvs+keepalived高可用群集
在客戶端的瀏覽器中，能夠通過lvs+keepalived群集的漂移位址（192.168.80.100）正常訪問web頁面內容，則驗證群集構建成功。
1. 驗證兩台web伺服器輪詢工作
win7訪問
2. 模擬主排程器故障，驗證結果
systemctl stop keepalived
//主排程器keepalived停止工作
3、模擬web伺服器aa故障
lvs+keepalived已成功搭建並測試完成
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