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<p class="MsoNormal">Hi all<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am testing the cinder/nova within IPv6 environment but not luck.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am testing the attatchment of volumes which are exposed by IPv6 iSCSI portals. We have modified the driver’s interface *<b>initialize_connection</b>* to return correct connection information(wrap the IPv6 address with []) for use of nova’s
os-brick, below is the dict returned by driver:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">{'driver_volume_type': u'iscsi', 'data': {'target_luns': [2, 2, 2, 2], 'target_iqns': [u'iqn.1992-04.com.emc:cx.apm00150602415.b0', u'iqn.1992-04.com.emc:cx.apm00150602415.a0', u'iqn.1992-04.com.emc:cx.apm00150602415.a0',
u'iqn.1992-04.com.emc:cx.apm00150602415.a0'], 'target_discovered': True, 'target_iqn': u'iqn.1992-04.com.emc:cx.apm00150602415.a0', 'target_portals': [u'192.168.1.60:3260', u'192.168.1.59:3260', u'[fd00:0:0:0:0:0:0:4]:3260', u'[fd27:2e95:e174:0:0:0:0:100]:3260'],
'volume_id': u'87458755-78a8-4c4b-8e8c-c906b3267b6c', 'target_lun': 2, 'target_portal': u'[fd00:0:0:0:0:0:0:4]:3260'}}<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">After driver returns above data to nova/os-brick, the nova-compute failed into an infinite loop keeping updating the iscsi node, and consumed 30% of the cpu, log entry like below:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">Dec 12 02:18:14 ubuntu16 nova-compute[1371]: DEBUG oslo_concurrency.processutils [None req-342eaed8-ca05-4387-b485-b4334e18e366 admin admin] CMD "iscsiadm -m node -T iqn.1992-04.com.emc:cx.apm00150602415.a0 -p [fd27:2e95:e174:0:0:0:0:100]:3260
--op update -n node.startup -v automatic" returned: 0 in 0.009s {{(pid=17633) execute /usr/local/lib/python2.7/dist-packages/oslo_concurrency/processutils.py:404}}<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And around 18360 node update executed for a single volume attachment:
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">$ grep "\-\-op update \-n node.startup" n-cpu.log | wc -l<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">18360<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This should not a network issue since I have manually logged in ipv6 portal with iscsiadm successfully.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am wondering whether this a known bug or a driver issue?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal">Peter<o:p></o:p></p>
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