<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">The idea is that the backend should specify the lun number in provider_location when the volume is created. The logic of defaulting to 1 or 0 is to support legacy volumes that may not have set the lun in provider_location. The code previously would just determine the lun programatically on the compute side based on the iscsi_helper flag.<div><br></div><div>If your backend is creating volumes at lun 0 then it needs to put lun 0 in the provider_location string that gets stored in the database.</div><div><br></div><div>provider location field:</div><div><portal><id> <iqn> <lunid></div><div>example:</div><div><span style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">172.16.</span><wbr style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); "><span style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">40.244:</span><wbr style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); "><span style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">3260,1 </span><span style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">iqn.2010-</span><wbr style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); "><span style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; "><a href="http://10.org">10.org</a>.</span><wbr style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); "><span style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">openstack:</span><wbr style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); "><span style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">volume-</span><wbr style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); "><span style="color: rgb(51, 51, 51); font-family: Ubuntu, 'Bitstream Vera Sans', 'DejaVu Sans', Tahoma, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">00000007 0</span></div><div><br></div><div>Vish</div><div><br><div><div>On Feb 21, 2012, at 5:39 PM, John Griffith wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Hey Folks,<br><br>I was trying to work on bug #917245 today and had troubles connecting<br>my iSCSI devices. After a bit of poking around I found the culprit in<br>nova/volume/driver.py<br><br><br> results = location.split(" ")<br> properties['target_portal'] = results[0].split(",")[0]<br> properties['target_iqn'] = results[1]<br> try:<br> properties['target_lun'] = int(results[2])<br> except (IndexError, ValueError):<br> if FLAGS.iscsi_helper == 'tgtadm':<br> properties['target_lun'] = 1<br> else:<br> properties['target_lun'] = 0<br><br>Unfortunately this doesn't work out very well. First, I don't know<br>how to derive the lun number from the discovery (perhaps devices with<br>multi lun support and multiple luns reported from "report luns"<br>populate something here that I'm not familiar with, or maybe newer<br>version of iscsiadm give us some additional info), but the other<br>problem is how do we pick the correct default value to revert to? In<br>the case of my particular device everything is Lun 0, and only Lun 0.<br>Looking at a wireshark trace you can see that report luns responds<br>with one lun and it's id is '0'.<br><br>So what happens in my case is when libvirt later goes through and<br>tries to attach the volume to an instance, it fails because the entry<br>it checks in /dev/disk/by_id has a mismatch in lun numbers. I'm<br>planning to file a bug on this and assign it to myself, but I wanted<br>some input first. I'm thinking that maybe there's a way to call<br>report luns or something and actually get the definitive value that<br>should be used here? Or maybe there's another iscsiadm command that<br>will give us the info we need?<br><br>I'm wondering if anybody knows the logic here and perhaps would like<br>to educate me on the special case that I am not familiar with? I also<br>figure I should make sure this wasn't changed by somebody to handle<br>their case where there device only support "Lun 1". :)<br><br>Thanks,<br>John<br><br>_______________________________________________<br>Mailing list: <a href="https://launchpad.net/~openstack">https://launchpad.net/~openstack</a><br>Post to : <a href="mailto:openstack@lists.launchpad.net">openstack@lists.launchpad.net</a><br>Unsubscribe : <a href="https://launchpad.net/~openstack">https://launchpad.net/~openstack</a><br>More help : <a href="https://help.launchpad.net/ListHelp">https://help.launchpad.net/ListHelp</a><br></div></blockquote></div><br></div></body></html>