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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D;mso-fareast-language:EN-US">I think it’s challenging to fence the other node via network when the network is down.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-ligatures:none;mso-fareast-language:EN-US">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-ligatures:none;mso-fareast-language:EN-US">Ulrich Windl<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none"> Users <users-bounces@clusterlabs.org>
<b>On Behalf Of </b>Anton Gavriliuk via Users<br>
<b>Sent:</b> Wednesday, March 11, 2026 6:45 PM<br>
<b>To:</b> Cluster Labs - All topics related to open-source clustering welcomed <users@clusterlabs.org><br>
<b>Cc:</b> Anton Gavriliuk <Anton.Gavriliuk@hpe.ua><br>
<b>Subject:</b> [EXT] [EXT] [ClusterLabs] DRBD diskless quorum vs DRBD "handlers" and "fencing" in two-node Pacemaker storage metro-cluster<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hello<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">There is two-node shared-nothing DRBD-based sync replication active/standby Pacemaker storage metro-cluster.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">DRBD replication links are directly (no switch) connected.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Configuration with Corosync quorum and DRBD diskless quorum are running on additional qdevice host.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Heuristics (parallel fping) and STONITH/fencing - fence_ipmilan and diskless sbd (hpwdt, /dev/watchdog).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Data consistency and integrity is absolute priority during any node/network breaks.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In such setup, should I add to DRBD resource files "handlers" and "fencing",<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">handlers {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> fence-peer "/usr/lib/drbd/crm-fence-peer.9.sh";<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> unfence-peer "/usr/lib/drbd/crm-unfence-peer.9.sh";<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">and<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> fencing resource-and-stonith; or fencing resource-only<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Or is it unnecessary and may even be counterproductive ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Anton<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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