在CentOS上可以通过yum直接安装Keepalvied
yum install keepalived
这里我们使用源码安装Keepalvied
wget http://www.keepalived.org/software/keepalived-1.2.15.tar.gz
tar zxvf keepalived-1.2.15.tar.gz
源码安装任何一个软件都要养成查看源码包文档的习惯，比如INSTALL，README,doc等文档，可以获得很多有用的信息
INSTALL文档中有描述
Kernel needing ============== Compile a kernel with the following options : Kernel/User netlink socket Network firewalls (for Kernel 2.2) LinuxVirtualServer Keepalived support all LVS code : including IPVS code for kernel 2.2 and kernel 2.4 Libraries dependency ==================== In order to compile Keepalived needs the following libraries : * OpenSSL, <www.openssl.org> * popt Installation ============ 1. uncompress the tarball 2. cd into the directory 3. './configure' 4. 'make' 5. 'make install'. This will install keepalived on your system, binaries and configuration file : * keepalived : The keepalived daemon program. * genhash : The MD5 url digest generator. You need it to configure HTTP GET check and SSL GET check in order to compute MD5SUM digest etalon. * /etc/keepalived/keepalived.conf 6. link keepalived.init into your runlevel directory. On redhat systems : ln -s /etc/rc.d/init.d/keepalived.init /etc/rc.d/rc3.d/S99keepalived By default configure script use /usr/local as base directory. You can change this value to your own by passing --prefix value to configure script eg: './configure --prefix=/usr/' Configuration ============= Just take a look to the /etc/keepalived/keepalived.conf file installed. It will give you all the informations needed. If you want more informations considering keepalived, please refer to the keepalived homepage into the documentation section. http://www.keepalived.org Have fun with it !
安装Keepalived前需要安装popt和openssl
yum -y install popt openssl openssl-devel popt-devel
mkdir -p /data/app_platform/keepalived/
cd keepalived-1.2.15
./configure --prefix=/data/app_platform/keepalived/
make
make install
mkdir -p /data/app_platform/keepalived/conf
编辑/data/app_platform/keepalived/conf/keepalived.conf文件
这里需要特别注意的是keepalived默认使用的配置文件是/etc/keepalived/keepalived.conf
如果要使用其他配置文件，在启动keepalived的时候需要通过-f 参数指定
Usage: /data/app_platform/keepalived/sbin/keepalived [OPTION...] -f, --use-file=FILE Use the specified configuration file -P, --vrrp Only run with VRRP subsystem -C, --check Only run with Health-checker subsystem -l, --log-console Log messages to local console -D, --log-detail Detailed log messages -S, --log-facility=[0-7] Set syslog facility to LOG_LOCAL[0-7] -V, --dont-release-vrrp Don't remove VRRP VIPs and VROUTEs on daemon stop -I, --dont-release-ipvs Don't remove IPVS topology on daemon stop -R, --dont-respawn Don't respawn child processes -n, --dont-fork Don't fork the daemon process -d, --dump-conf Dump the configuration data -p, --pid=FILE Use specified pidfile for parent process -r, --vrrp_pid=FILE Use specified pidfile for VRRP child process -c, --checkers_pid=FILE Use specified pidfile for checkers child process -v, --version Display the version number -h, --help Display this help message
! Configuration File for keepalived
global_defs {
notification_email {
admin@example.com 设置通知接收邮件地址
}
notification_email_from lb1@example.com 设置通知发送邮件地址
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LB1_MASTER
}
vrrp_script chk_haproxy { 检查HAProxy是否存在
script "killall -0 haproxy"
interval 2 每2秒检查一下HAProxy进程
weight 2
}
vrrp_instance VI_1 {
state MASTER LB1上设置为MASTER,LB2上设置为BACKUP
interface eth0
virtual_router_id 51
priority 100 MASTER设置为100，BACKUP设置为99，MASTER的值必须大于BACKUP
advert_int 1 设置MASTER和BACKUP之间同步检查时间间隔
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.1/24 brd 192.168.1.255 dev eth0 label eth0:ha
设置虚拟IP地址，为了便于查看虚拟IP，可以设置一个
}
track_script {
chk_haproxy
}
}
添加启动脚本
/etc/init.d/keepalived
#!/bin/sh
#
# keepalived High Availability monitor built upon LVS and VRRP
#
# chkconfig: - 86 14
# description: Robust keepalive facility to the Linux Virtual Server project \
# with multilayer TCP/IP stack checks.
### BEGIN INIT INFO
# Provides: keepalived
# Required-Start: $local_fs $network $named $syslog
# Required-Stop: $local_fs $network $named $syslog
# Should-Start: smtpdaemon httpd
# Should-Stop: smtpdaemon httpd
# Default-Start:
# Default-Stop: 0 1 2 3 4 5 6
# Short-Description: High Availability monitor built upon LVS and VRRP
# Description: Robust keepalive facility to the Linux Virtual Server
# project with multilayer TCP/IP stack checks.
### END INIT INFO
# Source function library.
. /etc/rc.d/init.d/functions
exec="/data/app_platform/keepalived/sbin/keepalived"
prog="keepalived"
config="/data/app_platform/keepalived/conf/keepalived.conf"
[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog
lockfile=/var/lock/subsys/keepalived
start() {
[ -x $exec ] || exit 5
[ -e $config ] || exit 6
echo -n $"Starting $prog: "
daemon $exec -D -f $config
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
return $retval
}
stop() {
echo -n $"Stopping $prog: "
killproc $prog
retval=$?
echo
[ $retval -eq 0 ] && rm -f $lockfile
return $retval
}
restart() {
stop
start
}
reload() {
echo -n $"Reloading $prog: "
killproc $prog -1
retval=$?
echo
return $retval
}
force_reload() {
restart
}
rh_status() {
status $prog
}
rh_status_q() {
rh_status &>/dev/null
}
case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
restart
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
exit 2
esac
exit $?注意这里
daemon $exec -D -f $config
参考文档：
http://www.keepalived.org/download.html
