i'll try to be more clear i work on redhat cluster from 2 years and i seen this topic so much times
this it's the problem with redhat cluster ping+quorum If i have a two node cluster with public_net+private_net I think it's normal my services switch if have the public network down on the node where the resource group was running,But But But with ping as heuristic you get a node fence And remember when you use a quorum disk on redhat cluster the fence decision it's based on the ping or heuristic Sorry i tell you something in Italian Usare il ping sul qdisk aggiungi solo dei problemi al cluster I nodi in un cluster devono essere fensati solo se perdono l'accesso al qdisk o la rete privata non funziona, in caso la mia rete privata รจ ok e i nodo riesco a accedere ai diski ma rete publica non funziona le risorse devono lo switchare Tell me if you need more info about the ping Il giorno 09 marzo 2012 16:44, Gianluca Cecchi <gianluca.cec...@gmail.com>ha scritto: > On Fri, 9 Mar 2012 15:39:43 +0100, emmanuel segura wrote: > > > Hello Gianluca > > Do you have a cluster private network? > > if your answer it's yes i recommend don't use heuristic because if your > cluster public network goes down > > your cluster take a fencing loop > > > > Or you can do something better, use pacemaker+corosync > > My cluster is RH EL 5.7 based. Pacemaker is not an option here... > And also, if I remember correctly, pacemaker in 6.2 is not officialy > supported yet. Probably in 6.3? > I do have a private network that is in place. > Here we are talking about heuristic to manage fencing decisions, based > on both quorum disk reachability and network serviceability (ping to > gateway for the production network must be ok) > > see also (even if not so recent): > http://magazine.redhat.com/2007/12/19/enhancing-cluster-quorum-with-qdisk/ > > But in the mean time I also found this thread: > http://osdir.com/ml/linux-cluster/2010-05/msg00081.html > > and in fact during last weeks we got a nightly job consisting of a big > ftp to an external site and it could be related to my problem... > > I have to evaluate if > ping -c3 -t3 -W1 > could be a better option in our new situation during night > > -- > Linux-cluster mailing list > Linux-cluster@redhat.com > https://www.redhat.com/mailman/listinfo/linux-cluster > -- esta es mi vida e me la vivo hasta que dios quiera
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