Any idea?
Thanks. Hai Tao > From: [email protected] > To: [email protected] > Date: Sun, 2 Oct 2011 19:20:00 -0700 > Subject: [Linux-HA] ping gateway before start resources to prevent brain split > > > Hi, > > We are deploying Linux HA on VMs. The problem is that we cannot use a serial > cable as a heartbeat communication link, and we have to totally depend on the > network. In case of network having connectivity issue, we will lose heartbeat > communication and brain split will happen. > > To prevent this from happening, I decide to put a script called pinggate into > /etc/ha.d/haresources before the other resources: > ------------------------------------------------------------------------ > # cat pinggate > #!/bin/sh > gateway=10.0.0.1 > case $1 in > start) if ! ping $gateway -c3; then > if ps -ef | grep -v grep | grep heartbeat; then > echo "shuting down heartbeat..." > ps -ef|grep heartbeat |grep -v grep |awk '{print $2}' |xargs kill {}; > fi > fi > ps -ef| grep -v grep |grep heartbeat || echo "hearbeat is stopped." > ;; > stop) true ;; > esac > exit 0; > --------------------------------------------------------------------------- > > what it does is when hb is lost, the slave will check if it can ping the > gateway before it starts other resources. If ping gateway fails, it will kill > heartbeat. Therefore, we make sure that brain split would not happen. > > Please let me know if you see any problem in my logic. > > By the way, does ipfail do the same thing? if I enable ipfail, will the slave > check pinging a gateway before starting up resources? > > > Thanks. > > Hai Tao > > > > > _______________________________________________ > Linux-HA mailing list > [email protected] > http://lists.linux-ha.org/mailman/listinfo/linux-ha > See also: http://linux-ha.org/ReportingProblems _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
