Linux HA installation and configuration example

In linux, the HA installation configuration example first installs HA (yast-I heartbeat) server1: 192.168.1.100server2: 192.168.1.101 on the two servers respectively. edit/etc/ha. d/authkeysTxt code auth 3 #1 crc #2 sha1 HI! 3. md5 ciaoskey edit/etc/ha. d/ha. cfTxt code 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 login on node server1 server2 ping 101_1.1 edit/etc/ha. d/haresourcesTxt code server1 IPaddr: 192.168.1.110/32 nginxd both servers listen to the virtual IP address 110, and the browser can access 192.168.1.110. The ha service can use/etc/init. d/heartbeat start | stop | reload and so on manage the following simple test A, start the heartbeat Txt code ciaos of the two machines respectively :~ #/Etc/init. d/heartbeat start Starting High-Availability services2012/11/22 _17: 10: 41 INFO: Resource is stopped heartbeat: udpport setting must precede media workflow: baudrate setting must precede media workflow [10368]: _ 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 recomme Nded heartbeat [10368]: _ 17:10:41 info: * *********************** heartbeat [10368]: _ 17:10:41 info: Configuration validated. starting heartbeat 2.1.3 done (access 192.168.1.110 with a browser to display first server) B. Close the HA above 100, as shown in the following: Txt code 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 (access 192.168.1.110 via browser to display second server) C. Restart HA of 100, the browser's access result is restored to the first server. In this way, a simple master-slave WEB server is built with the LSB script/etc/init. d/nginxd as follows (copy to heartbeat In the installation directory) (the online version cannot find the status command, I wrote a simple function here, the program has some problems) Shell code #! /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} 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