https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-7134 Lustre <p>SPL import protection only exists if <tt>hostid</tt> is set to a non-zero value. If servicenode or failover is given as an option, then mkfs.lustre should at least warn that <tt>hostid</tt> is set to zero and import protection won't work.</p> <p>Proposed solution:</p> <ul> <li>Have <tt>mkfs.lustre</tt> fail if <tt>&#45;&#45;servicenode</tt> / <tt>&#45;&#45;failover</tt> is specified and <tt>hostid</tt> is zero (will check <tt>spl&#95;hostid</tt> value).</li> <li>Add override option <tt>&#45;&#45;force&#45;nohostid</tt> to ignore this case</li> </ul> LU-7134

Ensure ZFS hostid protection if servicenode/failover options given to mkfs.lustre

Improvement Minor Resolved Fixed Nathaniel Clark Nathaniel Clark zfs Thu, 10 Sep 2015 20:21:40 +0000 Thu, 14 Jun 2018 21:41:17 +0000 Tue, 31 May 2016 12:51:19 +0000 Lustre 2.9.0 0 9 <p>SPL supports setting HostID in two ways:</p> <p> option spl spl_hostid to manually specify the HostID to use<br/> option spl spl_hostid_path to specify an alternate HostID file to use (default: /etc/hostid)</p> <p>What if I check the spl hostid /sys/module/spl/parameters/spl_hostid to ensure it's non-zero? It show the HostID is is using (even when read from /etc/hostid)</p> <p>Nathaniel Clark (nathaniel.l.clark@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/16611" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16611</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-7134" title="Ensure ZFS hostid protection if servicenode/failover options given to mkfs.lustre" class="issue-link" data-issue-key="LU-7134"><del>LU-7134</del></a> utils: Ensure MMP support in SPL/ZFS during mkfs<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 15b26271b2ce4ccd87b424a75765edbf9f5f82eb</p> <p>Upon closer reading of the code in ZFS, I'm not sure enabling this will help in a fail-over scenario or provide adequate protection. </p> <p>The code compares the host's hostid to the one written to the zpool and then prevents import if they don't match (unless one of the hostids is 0). This isn't true multi-mount protection. A more robust solution tracked in issue <a href="https://github.com/zfsonlinux/zfs/issues/745" class="external-link" target="_blank" rel="nofollow noopener">ZFS #745</a>.</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/16611/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16611/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-7134" title="Ensure ZFS hostid protection if servicenode/failover options given to mkfs.lustre" class="issue-link" data-issue-key="LU-7134"><del>LU-7134</del></a> utils: Ensure hostid set for ZFS during mkfs<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 7b654fc673a2570ab4a828c2a7b213cee8b5b0cc</p> <p>Landed for 2.9</p> Related LU-7797 LU-8816 LU-3163 LU-6889 Development Rank 1|hzxn6n: Rank (Obsolete) 9223372036854775807