Thanks for the info. I only use esxi, which likely explains why I never had issues...
Patrick Zwahlen <p...@navixia.com> wrote: >Hi, > >> -----Original Message----- >> From: Andreas Kurz [mailto:andreas.k...@gmail.com] >> Sent: mercredi, 17 août 2016 23:16 >> To: Cluster Labs - All topics related to open-source clustering welcomed >> <users@clusterlabs.org> >> Subject: Re: [ClusterLabs] Failing over NFSv4/TCP exports >> >> This is a known problem ... have a look into the portblock RA - it has >> the feature to send out TCP tickle ACKs to reset such hanging sessions. >> So you can configure a portblock resource that blocks the tcp port >> before starting the VIP and another portblock resource that unblocks the >> port afterwards and sends out that tickle ACKs. > >Thanks Andreas for pointing me to the portblock RA. I wasn't aware of it and >will read/test. > >I also made some further testing using ESXi and I found out that the ESXi NFS >client behaves in a completely different way when compared to the Linux client >and at first sight it actually seems to work (where the Linux client fails). > >It's mainly due to 2 things: > >1) Their NFS client is much more aggressive in terms of monitoring the server >and restarting sessions. > >2) Every new TCP session comes from a different source port compared to the >Linux client which seems to stick to a single source port. This actually >solves the issue of failing back to a node with FIN_WAIT1 sessions. > >Regards, Patrick > >************************************************************************************** >This email and any files transmitted with it are confidential and >intended solely for the use of the individual or entity to whom they >are addressed. If you have received this email in error please notify >the system manager. "postmas...@navixia.com" Navixia SA >************************************************************************************** >_______________________________________________ >Users mailing list: Users@clusterlabs.org >http://clusterlabs.org/mailman/listinfo/users > >Project Home: http://www.clusterlabs.org >Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf >Bugs: http://bugs.clusterlabs.org _______________________________________________ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
