<div dir="ltr"><span style="font-size:10pt;font-family:Arial,sans-serif">Hi,</span><span style="font-size:12pt;font-family:'Times New Roman',serif"> <br><br></span><span style="font-size:10pt;font-family:Arial,sans-serif">I have multinode Openstack Icehouse setup. I am trying to attach a volume of 100GB through cinder service. But I am not able to do that and it is failing.</span><div><span style="font-size:10pt;font-family:Arial,sans-serif"><br></span></div><div><span style="font-size:10pt;font-family:Arial,sans-serif">When I checked "/var/log/messages" I got the following error while attaching the
volume from the instance.</span></div><div><font face="Arial, sans-serif"><br></font></div><div><span style="font-size:10pt;font-family:Arial,sans-serif;color:blue">Nov 11 07:22:34 network-Blade3 sudo:   cinder : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/bin/cinder-rootwrap /etc/cinder/rootwrap.conf tgt-admin --force --delete iqn.2010-10.org.openstack:volume-ed123cfc-17f8-4fc6-bad4-24aea78407d2</span><span style="font-size:12pt;font-family:'Times New Roman',serif"> <br></span><span style="font-size:10pt;font-family:Arial,sans-serif;color:blue">Nov 11 07:22:34 network-Blade3 sudo:   cinder : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/bin/cinder-rootwrap /etc/cinder/rootwrap.conf tgt-admin --show</span><span style="font-size:12pt;font-family:'Times New Roman',serif"> <br></span><b><span style="font-size:10pt;font-family:Arial,sans-serif;color:blue">Nov 11 07:22:34 network-Blade3 kernel: [945233.808908] tgtd[14087]: segfault at 0 ip 00007fbb0b8e5b46 sp 00007fffb2591f48 error 4 in <a href="http://libc-2.11.3.so">libc-2.11.3.so</a>[7fbb0b7d3000+16e000]</span></b><span style="font-size:12pt;font-family:'Times New Roman',serif"> </span></div><div><font face="Times New Roman, serif" size="3"><br></font><span style="font-size:10pt;font-family:Arial,sans-serif">As far as I have understood, Cinder uses tgtd
service as iscsi back end to expose the volumes to the VMs running on compute
nodes.</span><span style="font-size:12pt;font-family:'Times New Roman',serif"> </span><span style="font-size:10pt;font-family:Arial,sans-serif">There will be a
target created by tgtd for every volume created by cinder. </span><span style="font-size:10pt;font-family:Arial,sans-serif">Compute nodes will
start an iscsi session to this target while attaching the volume and also it
closes the session while detaching.</span><span style="font-size:12pt;font-family:'Times New Roman',serif"><br>
<br>
</span><span style="font-size:10pt;font-family:Arial,sans-serif">When I further debug
this issue by attaching tgtd service to gdb. </span><span style="font-size:10pt;font-family:Arial,sans-serif">Segmentation fault is
raised in following method:</span><span style="font-size:12pt;font-family:'Times New Roman',serif"><br><br>
</span><span style="font-size:10pt;font-family:Arial,sans-serif;color:blue">Program
received signal SIGSEGV, Segmentation fault.</span><span style="font-size:12pt;font-family:'Times New Roman',serif"> <br>
</span><b><span style="font-size:10pt;font-family:Arial,sans-serif;color:blue">0x00007f082caa5b46
in __strcmp_sse42 () from /lib64/libc.so.6</span></b><span style="font-size:10pt;font-family:Arial,sans-serif;color:blue"> </span><span style="font-size:12pt;font-family:'Times New Roman',serif"><br></span></div><div><span style="font-size:10pt;font-family:Arial,sans-serif;color:blue"><br></span></div><div><span style="font-family:Arial,sans-serif;font-size:13px">Can anyone tell me how can I fix this?</span><span style="font-size:10pt;font-family:Arial,sans-serif;color:blue"><br></span></div><div><span style="font-family:Arial,sans-serif;font-size:13px"><br></span></div><div><span style="font-family:Arial,sans-serif;font-size:13px">BR,</span></div><div><span style="font-family:Arial,sans-serif;font-size:13px">Varun</span></div></div>