2）keepalived功能
3）keepalived元件
控制項：配置檔案解析器
io復用器
記憶體管理元件
圖示：
4）keepalived相關術語
5）keepalived的工作模式：
6）keepalived的工作方式
7）keepalived的安全工作
8）keepalived的通告：
• 各節點時間必須同步
• 關閉selinux和防火牆
1）keepalived安裝
2）編譯安裝
①獲取原始碼包並解壓縮
~]# cd /usr/local/src/ （/usr/local/src/原始碼包存放路徑）
src]# wget
src]# tar xf keepalived-2.0.18/
src]# cd keepalived-2.0.18/
②提供編譯環境
keepalived-2.0.18]# yum install -y gcc libnfnetlink-devel libnfnetlink ipvsadm libnl libnl-devel libnl3 libnl3-devel lm_sensors-libs net-snmp-agent-libs net-snmp-libs openssh-server openssh-clients openssl openssl-devel automake iproute
③configure
keepalived-2.0.18]# ./configure --prefix=/usr/local/keepalived --disable-fwmark
==># echo $? ==>確認沒報錯
④make && make install
keepalived-2.0.18]# make && make install
⑤複製相關配置檔案及啟動指令碼
keepalived-2.0.18]# cp /usr/local/src/keepalived-2.0.18/keepalived/etc/init.d/keepalived.rh.init /etc/sysconfig/keepalived.sysconfig
keepalived-2.0.18]# cp /usr/local/src/keepalived-2.0.18/keepalived/keepalived.service /usr/lib/systemd/system/
keepalived-2.0.18]# cp /usr/local/src/keepalived-2.0.18/bin/keepalived /usr/local/bin/
⑥準備簡單的配置測試keepalived能否使用
keepalived-2.0.18]# vim /etc/keepalived/keepalived.conf
global_defs
notification_email_from root@localhost
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id centos7-27
} vrrp_instance vi_1
virtual_ipaddress
}keepalived-2.0.18]# systemctl start keepalived
主程式檔案：/usr/sbin/keepalived
service file：
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