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We don't have the ability to use it.<br>
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Is that the only solution?<br>
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In addition, it will not cover a scenario that the server room is down (for example - fire or earthquake), the switch will go down as well.<br>
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From: Klaus Wenninger<br>
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Sent: Monday, July 24, 15:31<br>
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Subject: Re: [ClusterLabs] Two nodes cluster issue<br>
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To: Cluster Labs - All topics related to open-source clustering welcomed, Kristián Feldsam<br>
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On 07/24/2017 02:05 PM, Kristián Feldsam wrote:<br>
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Hello, you have to use second fencing device, for ex. APC Switched PDU. <br>
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<a href="https://wiki.clusterlabs.org/wiki/Configure_Multiple_Fencing_Devices_Using_pcs">https://wiki.clusterlabs.org/wiki/Configure_Multiple_Fencing_Devices_Using_pcs</a><br>
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Problem here seems to be that the fencing devices available are running from<br>
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the same power-supply as the node itself. So they are kind of useless to determine<br>
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weather the partner-node has no power or simply is no reachable via network.<br>
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S pozdravem Kristián Feldsam<br>
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Tel.: +420 773 303 353, +421 944 137 535<br>
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E-mail.: <a href="mailto:support@feldhost.cz">support@feldhost.cz</a><br>
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<a href="http://www.feldhost.cz">www.feldhost.cz</a> - FeldHost™ – profesionální hostingové a serverové služby za adekvátní ceny.<br>
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FELDSAM s.r.o.<br>
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V rohu 434/3<br>
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Praha 4 – Libuš, PSČ 142 00<br>
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IČ: 290 60 958, DIČ: CZ290 60 958<br>
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C 200350 vedená u Městského soudu v Praze<br>
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Banka: Fio banka a.s.<br>
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Číslo účtu: 2400330446/2010<br>
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BIC: FIOBCZPPXX<br>
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IBAN: CZ82 2010 0000 0024 0033 0446 <br>
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On 24 Jul 2017, at 13:51, Tomer Azran <a href="mailto:tomer.azran@edp.co.il"><tomer.azran@edp.co.il></a> wrote:<br>
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Hello,<br>
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We built a pacemaker cluster with 2 physical servers.<br>
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We configured DRBD in Master\Slave setup, a floating IP and file system mount in Active\Passive mode.<br>
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We configured two STONITH devices (fence_ipmilan), one for each server.<br>
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We are trying to simulate a situation when the Master server crushes with no power.<br>
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We pulled both of the PSU cables and the server becomes offline (UNCLEAN).<br>
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The resources that the Master use to hold are now in Started (UNCLEAN) state.<br>
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The state is unclean since the STONITH failed (the STONITH device is located on the server (Intel RMM4 - IPMI) – which uses the same power supply).<br>
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The problem is that now, the cluster does not releasing the resources that the Master holds, and the service goes down.<br>
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Is there any way to overcome this situation?<br>
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We tried to add a qdevice but got the same results.<br>
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If you have already setup qdevice (using an additional node or so) you could use <br>
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quorum-based watchdog-fencing via SBD.<br>
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We are using pacemaker 1.1.15 on CentOS 7.3<br>
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Thanks,<br>
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Tomer.<br>
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_______________________________________________<br>
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Getting started: <a href="http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf">http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf</a><br>
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Bugs: <a href="http://bugs.clusterlabs.org/">http://bugs.clusterlabs.org</a><br>
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_______________________________________________ Users mailing list: <a href="mailto:Users@clusterlabs.org">
Users@clusterlabs.org</a> <a href="http://lists.clusterlabs.org/mailman/listinfo/users">
http://lists.clusterlabs.org/mailman/</a><a href="http://lists.clusterlabs.org/mailman/listinfo/users">listinfo</a><a href="http://lists.clusterlabs.org/mailman/listinfo/users">/users</a> Project Home:
<a href="http://www.clusterlabs.org">http://www.clusterlabs.org</a> Getting started:
<a href="http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf">http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf</a> Bugs:
<a href="http://bugs.clusterlabs.org">http://bugs.clusterlabs.org</a> <br>
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-- Klaus Wenninger Senior Software Engineer, EMEA ENG Openstack Infrastructure Red Hat
<a href="mailto:kwenning@redhat.com">kwenning</a><a href="mailto:kwenning@redhat.com">@redhat.com</a>
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