linux下HA的安装配置示例
linux下HA的安装配置示例
linux下HA的安装配置示例
首先分别在两台服务器上安装HA(yast -i heartbeat)
server1:192.168.1.100
server2:192.168.1.101
编辑/etc/ha.d/authkeys
Txt代码
auth 3
#1 crc
#2 sha1 HI!
3 md5 ciaoskey
编辑/etc/ha.d/ha.cf
Txt代码
logfile /var/log/ha-log
logfacility local0
keepalive 2
deadtime 30
warntime 10
udpport 19871
ucast eth0 192.168.1.101
#for server 2 configure
#ucast eth0 192.168.1.100
auto_failback on
node server1 server2
ping 102.168.1.1
编辑/etc/ha.d/haresources
Txt代码
server1 IPaddr::192.168.1.110/32 nginxd
两台服务器均监听110这个虚拟IP,前端浏览器访问192.168.1.110即可。
ha服务就可以通过/etc/init.d/heartbeat start|stop|reload等管理了
下面做一个简单的测试
A,分别启动两台机器的heartbeat
Txt代码
ciaos:~ # /etc/init.d/heartbeat start
Starting High-Availability services2012/11/22_17:10:41 INFO: Resource is stopped
heartbeat: udpport setting must precede media statementsheartbeat: baudrate setting must precede media statementsheartbeat[10368]: 2012/11/22_17:10:41 info: Version 2 support: false
heartbeat[10368]: 2012/11/22_17:10:41 WARN: Logging daemon is disabled --enabling logging daemon is recommended
heartbeat[10368]: 2012/11/22_17:10:41 info: **************************
heartbeat[10368]: 2012/11/22_17:10:41 info: Configuration validated. Starting heartbeat 2.1.3
done
(用浏览器访问192.168.1.110显示first server)
B,关闭100上面的HA,如下:
Txt代码
ciaos:~ # /etc/init.d/heartbeat stop
Stopping High-Availability services done
logd[10282]: 2012/11/22_17:10:04 debug: Stopping ha_logd with pid 9650
logd[10282]: 2012/11/22_17:10:04 info: Waiting for pid=9650 to exit
logd[10282]: 2012/11/22_17:10:05 info: Pid 9650 exited
(用浏览器访问192.168.1.110显示second server)
C,重启100的HA,用浏览器访问结果恢复为first server
这样,一个简单的主备WEB服务器就搭建完毕
附LSB格式脚本/etc/init.d/nginxd如下(需要拷贝到heartbeat的安装目录下)(网上那个版本找不到status命令,我这里写了个函数简单代替,程序还有点问题)
Shell代码
#!/bin/sh
. /usr/lib/ocf/resource.d//heartbeat/.ocf-shellfuncs
RETVAL=0
prog="nginx"
nginxDir=/usr/local/nginx
nginxd=$nginxDir/sbin/nginx
nginxConf=$nginxDir/conf/nginx.conf
nginxPid=$nginxDir/logs/nginx.pid
nginx_check()
{
if [[ -e $nginxPid ]]; then
ps aux |grep -v grep |grep -q nginx
if (( $? == 0 )); then
echo "$prog already running..."
exit 1
else
rm -rf $nginxPid &> /dev/null
fi
fi
}
start()
{
nginx_check
if (( $? != 0 )); then
true
else
echo -n $"Starting $prog:"
`$nginxd -c $nginxConf`
RETVAL=$?
echo
[ $RETVAL = 0 ] && touch /var/lock/subsys/nginx
return $RETVAL
fi
}
stop()
{
echo -n $"Stopping $prog:"
killproc $nginxd
RETVAL=$?
echo
[ $RETVAL = 0 ] && rm -f /var/lock/subsys/nginx $nginxPid
}
reload()
{
echo -n $"Reloading $prog:"
killproc $nginxd -HUP
RETVAL=$?
echo
}
status()
{
nginx_check
if (( $? != 0 )); then
return 0
else
return 1
fi
}
monitor()
{
status $prog &> /dev/null
if (( $? == 0 )); then
RETVAL=0
else
RETVAL=7
fi
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
start
;;
reload)
reload
;;
status)
status $prog
RETVAL=$?
;;
monitor)
monitor
;;
*)
echo $"Usage: $0 {start|stop|restart|reload|status|monitor}"
RETVAL=1
esac
exit $RETVAL
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