>>> Klaus Wenninger <[email protected]> schrieb am 08.09.2016 um 11:45 in Nachricht <[email protected]>: > On 09/08/2016 10:58 AM, Shermal Fernando wrote: >> Hi Jehan-Guillaume, >> >> Does this means watchdog will serf-terminate the machine when the crm daemon > is frozen? > > Would be desirable but doesn't seem to happen - at least till now - will > see what I can do on that front.
I think in HP-UX Service Guard the corresponding process of crmd was feeding (periodically resetting) the kernel watchdog (like every 10 seconds). When the process was killed or stopped in a non expected way (the process would disable the watcdog on clean exit), the kernel watchdog triggered a kernel panic, effectively fencing the node. > >> >> Regards, >> Shermal Fernando >> >> >> >> >> >> >> >> >> -----Original Message----- >> From: Jehan-Guillaume de Rorthais [mailto:[email protected]] >> Sent: Thursday, September 08, 2016 12:52 PM >> To: Digimer >> Cc: Cluster Labs - All topics related to open-source clustering welcomed >> Subject: Re: [ClusterLabs] Antw: Re: When the DC crmd is frozen, cluster > decisions are delayed infinitely >> >> On Thu, 8 Sep 2016 15:55:50 +0900 >> Digimer <[email protected]> wrote: >> >>> On 08/09/16 03:47 PM, Ulrich Windl wrote: >>>>>>> Shermal Fernando <[email protected]> schrieb am >>>>>>> 08.09.2016 um >>>>>>> 06:41 in >>>> Nachricht >>>> <8ce6e8d87f896546b9c65ed80d30a4336578c...@lg-spmb-mbx02.lseg.stockex.local>: >>>>> The whole cluster will fail if the DC (crm daemon) is frozen due to >>>>> CPU starvation or hanging while trying to perform a IO operation. >>>>> Please share some thoughts on this issue. >>>> What is "the whole cluster will fail"? If the DC times out, some >>>> recovery will take place. >>> Yup. The starved node should be declared lost by corosync, the >>> remaining nodes reform and if they're still quorate, the hung node >>> should be fenced. Recovery occur and life goes on. >> +1 >> >> And fencing might either come from outside, or just from the server itself > using watchdog. >> >> -- >> Jehan-Guillaume (ioguix) de Rorthais >> Dalibo >> >> _______________________________________________ >> Users mailing list: [email protected] > 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 >> >> >> This e-mail transmission (inclusive of any attachments) is strictly > confidential and intended solely for the ordinary user of the e-mail address > to which it was addressed. It may contain legally privileged and/or > CONFIDENTIAL information. The unauthorized use, disclosure, distribution > printing and/or copying of this e-mail or any information it contains is > prohibited and could, in certain circumstances, constitute an offence. If you > have received this e-mail in error or are not an intended recipient please > inform the sender of the email and MillenniumIT immediately by return e-mail > or telephone (+94-11) 2416000. We advise that in keeping with good computing > practice, the recipient of this e-mail should ensure that it is virus free. > We > do not accept responsibility for any virus that may be transferred by way of > this e-mail. E-mail may be susceptible to data corruption, interception and > unauthorized amendment, and we do not accept liability for any such > corruption, interceptio! >> n or amen >> dment or any consequences thereof. www.millenniumit.com >> >> >> _______________________________________________ >> Users mailing list: [email protected] >> 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: [email protected] > 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: [email protected] 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
