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<p class="MsoNormal">Hello guys!<o:p></o:p></p>
<p class="MsoNormal">We have currently an installation of Openstack Liberty+KVM+Ububntu 14.04, mostly default<o:p></o:p></p>
<p class="MsoNormal">Cinder and Nova are backed with qcow2 over NFS, cinder volumes resides on the same servers running nova-compute<o:p></o:p></p>
<p class="MsoNormal">The problem is – we do have power issues in our building, and not always we can turn off servers properly, when this happens<o:p></o:p></p>
<p class="MsoNormal">So, when the power is down, and network is down, all instances that has cinder volumes connected hangs.<o:p></o:p></p>
<p class="MsoNormal">Simply nfs share becomes unavailable, even if the share is mounted locally (from 192.168.1.29 onto 192.168.1.29, for example), I can’t even ls there, it hangs.<o:p></o:p></p>
<p class="MsoNormal">And it never goes up, until the server reboot, even if the network is back.<o:p></o:p></p>
<p class="MsoNormal">I can’t even restart instance from KVM locally, it says that device is busy<o:p></o:p></p>
<p class="MsoNormal">So, every instance which has cinder volume mounted hangs and wouldn’t go up until hypervisor rebooted<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is there a way to fix this issue? <o:p></o:p></p>
<p class="MsoNormal">At least make instances with local cinder volumes (the same host where nova runs this instance) not hang?<o:p></o:p></p>
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