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<p class="MsoNormal">Hello ovirt gurus,<o:p></o:p></p>
<p class="MsoNormal">I’d like to bother you with a long lasting issue I face.<o:p></o:p></p>
<p class="MsoNormal">My (new) test setup (not production one) is running ovirt 4.04 hosted engine on a Dell R510 server connected to SAN Compellent SC040 via iscsi.<o:p></o:p></p>
<p class="MsoNormal">All systems installed from scratch following guidelines.<o:p></o:p></p>
<p class="MsoNormal">Ovirt hosted engine installed using ovirt-appliance.<o:p></o:p></p>
<p class="MsoNormal">Everything is working “fine”.<o:p></o:p></p>
<p class="MsoNormal">BUT<o:p></o:p></p>
<p class="MsoNormal">We are unable to perform a clear LUN removal.<o:p></o:p></p>
<p class="MsoNormal">We can perform all actions from web interface (storage add, maintenance, detach, delete) with no error.<o:p></o:p></p>
<p class="MsoNormal">However, underlying device remains mapped to server. As a result, we are unable to unmap the LUN otherwise multipath fails, server fails, ovirt fails etc.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Steps to reproduce:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Create LUN on SAN, map it to server -> OK<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Log in ovirt web interface, add a new storage targeting LUN -> OK<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Create disk, create VM setup VM, (optional) -> OK<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">4)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Shutdown VM -> OK<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">5)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Ovirt: Put storage in maintenance -> OK<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">6)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Ovirt: Detach storage -> OK<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">7)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Ovirt: Delete storage -> OK<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Expected result:<o:p></o:p></p>
<p class="MsoNormal">Ovirt unmaps and remove device from multipath so that it can be destroyed at SAN storage level.<o:p></o:p></p>
<p class="MsoNormal">It should be possible to perform this action even when host is not in maintenance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Current result: volume remain locked in multipath (map in use).<o:p></o:p></p>
<p class="MsoNormal">Trying vgchange -a n <DEVICE> and then multipath -f <DEVICE> removes device, but then it is automatically re-added after a while (???)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please note: this is the same behavior we always faced also with our ovirt production environment.<o:p></o:p></p>
<p class="MsoNormal">Details attached. Volume to be removed: LUN 000064<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any ideas?<o:p></o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal">AG<o:p></o:p></p>
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