探究keepalived的安装
CentOS 6通过yum安装keepalived
/etc/keepalived
/etc/keepalived/keepalived.conf
/etc/rc.d/init.d/keepalived
/etc/sysconfig/keepalived
/usr/bin/genhash --这个不知道是干嘛用的
/usr/libexec/keepalived --这个文件夹里边啥也没有
/usr/sbin/keepalived
/usr/share/doc/keepalived-1.2.13
/usr/share/doc/keepalived-1.2.13/AUTHOR
/usr/share/doc/keepalived-1.2.13/CONTRIBUTORS
/usr/share/doc/keepalived-1.2.13/COPYING
/usr/share/doc/keepalived-1.2.13/ChangeLog
/usr/share/doc/keepalived-1.2.13/NOTE_vrrp_vmac.txt
/usr/share/doc/keepalived-1.2.13/README
/usr/share/doc/keepalived-1.2.13/TODO
/usr/share/doc/keepalived-1.2.13/VERSION
/usr/share/doc/keepalived-1.2.13/keepalived.conf.SYNOPSIS
/usr/share/doc/keepalived-1.2.13/samples
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.HTTP_GET.port
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.IPv6
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.SMTP_CHECK
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.SSL_GET
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.fwmark
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.inhibit
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.misc_check
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.misc_check_arg
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.quorum
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.sample
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.status_code
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.track_interface
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.virtual_server_group
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.virtualhost
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.vrrp
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.vrrp.localcheck
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.vrrp.lvs_syncd
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.vrrp.routes
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.vrrp.scripts
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.vrrp.static_ipaddress
/usr/share/doc/keepalived-1.2.13/samples/keepalived.conf.vrrp.sync
/usr/share/doc/keepalived-1.2.13/samples/sample.misccheck.smbcheck.sh
/usr/share/man/man1/genhash.1.gz
/usr/share/man/man5/keepalived.conf.5.gz
/usr/share/man/man8/keepalived.8.gz
/usr/share/snmp/mibs/KEEPALIVED-MIB.txtman目录下是一些参数的说明可以执行man keepalived看到。doc目录下的samples里边有一些配置文件的例子。
主要看这几个
- /etc/keepalived/keepalived.conf
- /etc/rc.d/init.d/keepalived
- /etc/sysconfig/keepalived
- /usr/sbin/keepalived
我把keepalived进行make install后，得到的文件为
- /usr/local/keepalived/bin/genhash 不知道这个文件是干嘛用的
- /usr/local/keepalived/etc/keepalived/keepalived.conf
- /usr/local/keepalived/etc/keepalived/samples文件夹
- /usr/local/keepalived/etc/sysconfig/keepalived
- /usr/local/keepalived/sbin/keepalived
- /usr/local/keepalived/share/man文件夹
- /usr/local/keepalived/share/snamp文件夹
主要看这几个
- /usr/local/keepalived/etc/keepalived/keepalived.conf
- /usr/local/keepalived/etc/sysconfig/keepalived
- /usr/local/keepalived/sbin/keepalived
发现和yum安装的比较少了一个/etc/rc.d/init.d/keepalived这个文件是用来加入系统服务用的。
我下载了keepalived之后解压，可以在此目录下找到这个文件
keepalived-1.3.4\keepalived\etc\init.d\keepalived打开这个文件
#!/bin/sh
#
# Startup script for the Keepalived daemon
#
# processname: keepalived
# pidfile: /var/run/keepalived.pid
# config: /etc/keepalived/keepalived.conf
# chkconfig: - 21 79
# description: Start and stop Keepalived
# Source function library
. /etc/rc.d/init.d/functions
# Source configuration file (we set KEEPALIVED_OPTIONS there)
. /etc/sysconfig/keepalived
RETVAL=0
prog="keepalived"
start() {
echo -n $"Starting $prog: "
daemon keepalived ${KEEPALIVED_OPTIONS}
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/$prog
}
stop() {
echo -n $"Stopping $prog: "
killproc keepalived
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$prog
}
reload() {
echo -n $"Reloading $prog: "
killproc keepalived -1
RETVAL=$?
echo
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
reload)
reload
;;
restart)
stop
start
;;
condrestart)
if [ -f /var/lock/subsys/$prog ]; then
stop
start
fi
;;
status)
status keepalived
RETVAL=$?
;;
*)
echo "Usage: $0 {start|stop|reload|restart|condrestart|status}"
RETVAL=1
esac
exit $RETVAL看注释
# config: /etc/keepalived/keepalived.conf所以要把/usr/local/keepalived/etc/keepalived/keepalived.conf复制到/etc/keepalived/目录下。
可以看到他执行了. /etc/rc.d/init.d/functions这个文件，在这个里边有这么句话
# Set up a default search path.
PATH="/sbin:/usr/sbin:/bin:/usr/bin"
export PATH也就是说会从这几个目录下寻找。所以要把/usr/local/keepalived/sbin/keepalived复制到/usr/sbin/目录下
并且keepalived-1.3.4\keepalived\etc\init.d\keepalived文件里边用的daemon函数也是在functions文件中定义的。
再往下看可以看到执行了. /etc/sysconfig/keepalived这个文件，所以要把/usr/local/keepalived/etc/sysconfig/keepalived拷贝到/etc/sysconfig/目录下，并且注释说定义了一个变量在里边，
# Source configuration file (we set KEEPALIVED_OPTIONS there)
. /etc/sysconfig/keepalived再往下面看
start() {
echo -n $"Starting $prog: "
daemon keepalived ${KEEPALIVED_OPTIONS}
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/$prog
}start方法里边用到了KEEPALIVED_OPTIONS这个变量
打开/usr/local/keepalived/etc/sysconfig/keepalived
# Options for keepalived. See `keepalived --help' output and keepalived(8) and
# keepalived.conf(5) man pages for a list of all options. Here are the most
# common ones :
#
# --vrrp -P Only run with VRRP subsystem.
# --check -C Only run with Health-checker subsystem.
# --dont-release-vrrp -V Dont remove VRRP VIPs & VROUTEs on daemon stop.
# --dont-release-ipvs -I Dont remove IPVS topology on daemon stop.
# --dump-conf -d Dump the configuration data.
# --log-detail -D Detailed log messages.
# --log-facility -S 0-7 Set local syslog facility (default=LOG_DAEMON)
#
KEEPALIVED_OPTIONS="-D"
发现默认情况下，这个变量存的就是-D，他的意思就是打印详细日志信息。注释中还提到了一些其他的选项可以根据自己的需求自定义设置。
总结源码安装
之前先要准备安装环境
yum -y install kernel-devel*
yum -y install openssl-*
yum -y install popt-devel
yum -y install lrzsz
yum -y install openssh-clients
yum -y install libnl libnl-devel popt这些应该够，如果不够看执行./configure的时候缺啥再安装啥。
将keepalived-1.3.4.tar.gz上传到服务器/usr/local下
cd /usr/local
tar -xvf keepalived-1.3.4.tar.gz
cd keepalived-1.3.4执行配置命令
./configure --prefix=/usr/local/keepalived编译make
安装make install
拷贝文件
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/创建keepalived文件夹
mkdir -p /etc/keepalived将配置文件拷贝到此目录
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf然后在keepalived的解压目录中找到keepalived-1.3.4\keepalived\etc\init.d\keepalived将其拷贝到/etc/rc.d/init.d/目录下(拷贝到/etc/init.d/目下也是可以的，因为init.d会链接到rc.d/init.d)
添加执行权限
chmod +x keepalived然后加入系统服务,加入了之后就可以使用service keepalived start这样的命令了
chkconfig --add keepalived #添加时必须保证/etc/rc.d/init.d/keepalived存在之后查看是否加入了系统服务
chkconfig --list加入开机启动
chkconfig keepalived onCentOS7
在CentOS 7中通过yum安装，安装的东西有
/etc/keepalived
/etc/keepalived/keepalived.conf
/etc/sysconfig/keepalived
/usr/bin/genhash --不知道是干嘛的
/usr/lib/systemd/system/keepalived.service
/usr/libexec/keepalived --是个文件夹，里边什么都没有
/usr/sbin/keepalived
/usr/share/doc/keepalived-1.3.5
/usr/share/doc/keepalived-1.3.5/AUTHOR
/usr/share/doc/keepalived-1.3.5/CONTRIBUTORS
/usr/share/doc/keepalived-1.3.5/COPYING
/usr/share/doc/keepalived-1.3.5/ChangeLog
/usr/share/doc/keepalived-1.3.5/NOTE_vrrp_vmac.txt
/usr/share/doc/keepalived-1.3.5/README
/usr/share/doc/keepalived-1.3.5/TODO
/usr/share/doc/keepalived-1.3.5/keepalived.conf.SYNOPSIS
/usr/share/doc/keepalived-1.3.5/samples
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.HTTP_GET.port
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.IPv6
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.SMTP_CHECK
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.SSL_GET
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.fwmark
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.inhibit
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.misc_check
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.misc_check_arg
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.quorum
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.sample
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.status_code
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.track_interface
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.virtual_server_group
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.virtualhost
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.localcheck
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.lvs_syncd
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.routes
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.rules
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.scripts
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.static_ipaddress
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.sync
/usr/share/doc/keepalived-1.3.5/samples/sample.misccheck.smbcheck.sh
/usr/share/man/man1/genhash.1.gz
/usr/share/man/man5/keepalived.conf.5.gz
/usr/share/man/man8/keepalived.8.gz
/usr/share/snmp/mibs/KEEPALIVED-MIB.txt
/usr/share/snmp/mibs/VRRP-MIB.txt
/usr/share/snmp/mibs/VRRPv3-MIB.txt主要看这几个
- /etc/keepalived/keepalived.conf
- /etc/sysconfig/keepalived
- /usr/sbin/keepalived
- /usr/lib/systemd/system/keepalived.service
在回头看CentOS6的yum安装
- /etc/keepalived/keepalived.conf
- /etc/sysconfig/keepalived
- /usr/sbin/keepalived
- /etc/rc.d/init.d/keepalived
会发现别的都一样就是设置系统服务的文件不一样了，keepalived.service可以在keepalived的解压包的keepalived-1.3.4\keepalived\keepalived.service目录下找到。
打开keepalived.service
[Unit]
Description=LVS and VRRP High Availability Monitor
After=syslog.target network-online.target
[Service]
Type=forking
PIDFile=/var/run/keepalived.pid
KillMode=process
EnvironmentFile=-/etc/sysconfig/keepalived
ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target先主要看
#在程序执行前先执行这个文件
EnvironmentFile=-/etc/sysconfig/keepalived
ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS总结CentOS7中的源码安装
和CentOS6中的源码安装基本一样，只是加入系统服务的时候有区别。
把keepalived-1.3.4\keepalived\keepalived.service复制到/usr/lib/systemd/system/目录下，这样就算加入系统服务了，就可使用systemctl status keepalived了。
设置开机自启，执行systemctl enable keepalived