时间：2018.7.31
作者：李强
参考：man,info，magedu讲义,万能的internet
实验环境：VMware® Workstation 12 Pro ，Centos 7.4，SecureCRT Version 8.1.4
声明：以下英文纯属个人翻译，英文B级，欢迎纠正，以下内容纯属个人理解，并没有对错，只是参考，盗版不纠,才能有限，希望不误人子弟为好。
版本：v1-2018.7.31
一、 参考资料
1、https://www.cnblogs.com/succeed/p/6697185.html
2、https://www.cnblogs.com/waynechou/p/keepalived.html
3、http://www.keepalived.org/doc/installing_keepalived.html
4、https://blog.csdn.net/liyuling52011/article/details/80033229
二、安装前环境准备
yum install curl gcc openssl-devel libnl3-devel net-snmp-devel
三、软件目录规划
软件安装目录：/usr/local/app/keepalived_v
日志文件单独存放在/var/log/keepalived/keepalived.log下
四、开始编译
1、下载源码包
下载站点：
1、http://www.keepalived.org/download.html
2、http://keepalived.org/software
cd /tmp
curl --progress http://keepalived.org/software/keepalived-2.0.6.tar.gz | tar xz2、编译
cd keepalived-2.0.6
./configure
# 此处可以--prefix 来指定编译的软件安装路径usr/local/ewifi/keepalived_v/keepalived-2.0.6
make && make install
编译出现错误：
configure: error: libnfnetlink headers missing
此时需要安装：
yum -y install libnfnetlink-devel
PS:编译时出现问题，基本上安装xx-devel即可
此时在执行./configure --prefix=usr/local/ewifi/keepalived_v/keepalived-2.0.6
出现如下提示，即编译成功。
Keepalived configuration
------------------------
Keepalived version : 2.0.6
Compiler : gcc
Preprocessor flags : -I/usr/include/libnl3
Compiler flags : -Wall -Wunused -Wstrict-prototypes -Wextra -Winit-self -g -D_GNU_SOURCE -fPIE -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -O2
Linker flags : -pie
Extra Lib : -lcrypto -lssl -lnl-genl-3 -lnl-3
Use IPVS Framework : Yes
IPVS use libnl : Yes
IPVS syncd attributes : No
IPVS 64 bit stats : No
fwmark socket support : Yes
Use VRRP Framework : Yes
Use VRRP VMAC : Yes
Use VRRP authentication : Yes
With ip rules/routes : Yes
Use BFD Framework : No
SNMP vrrp support : No
SNMP checker support : No
SNMP RFCv2 support : No
SNMP RFCv3 support : No
DBUS support : No
SHA1 support : No
Use Json output : No
libnl version : 3
Use IPv4 devconf : No
Use libiptc : No
Use libipset : No
init type : systemd
Build genhash : Yes
Build documentation : No3、自启动脚本
yum 安装的目录结构
/etc/keepalived
/etc/keepalived/keepalived.conf
/etc/sysconfig/keepalived
/usr/bin/genhash
/usr/lib/systemd/system/keepalived.service
/usr/libexec/keepalived
/usr/sbin/keepalived
/usr/share/doc/keepalived-1.3.5
编译安装后，会根据系统环境，生成启动脚本。
[root@zabbix_server keepalived]# cat /usr/lib/systemd/system/keepalived.service
[Unit]
Description=LVS and VRRP High Availability Monitor
After= network-online.target syslog.target
Wants=network-online.target
[Service]
Type=forking
PIDFile=/var/run/keepalived.pid
KillMode=process
EnvironmentFile=-/usr/local/ewifi/keepalived_v/keepalived-2.0.6/etc/sysconfig/keepalived
ExecStart=/usr/local/ewifi/keepalived_v/keepalived-2.0.6/sbin/keepalived $KEEPALIVED_OPTIONS
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target
!!!!这里需要检查配置文件是否正确。然后是sysconfig/keepalived需要进行改造。这里建立软链接都没用。
否则启动会报错
Unable to find configuration file /etc/keepalived/keepalived.conf (glob returned 3)
7月 31 11:52:58 zabbix_server systemd[1]: PID file /var/run/keepalived.pid not readable (yet?) after start.
cd /usr/local/ewifi/keepalived_v/keepalived-2.0.6/etc/sysconfig/
sed -i 's@KEEPALIVED_OPTIONS=.*@KEEPALIVED_OPTIONS="-f /usr/local/ewifi/keepalived_v/keepalived-2.0.6/etc/keepalived/keepalived.conf -D -S 0"@' keepalived
这里需要使用-f指定配置文件路径才能正常启动。
!!!!默认的日志存放位置在/var/log/messages中。
echo 'local0.* /var/log/keepalived/keepalived.log' >>/etc/rsyslog.conf
然后需要修改keepalived.conf 配置文件才可以启动成功，备份原始文件，删除里面定义的vrrp和lvs相关信息。
重启服务即可。
4、设置开机启动
systemctl enable keepalived.service
5、 建立备忘录
cd /usr/local/app/keepalived_v/keepalived-2.0.6
cat >>README <<eof
1、启动服务在/usr/lib/systemd/system/keepalived.service,并设置了开机启动
2、修改日志文件存放位置/var/log/keepalived/keepalived.log
echo 'local0.* /var/log/keepalived/keepalived.log' >>/etc/rsyslog.conf
eof