After the cinder-volume restarted the new ISCSI files will add field 'IncomingUser' automaticlly, and it makes ISCSI can not recognized the new volume.
cinder:
/etc/cinder/volumes/volume-dbdff91c-c332-4c8a-9792-de73be016dbf :
<target iqn.2010-10.org.openstack:volume-dbdff91c-c332-4c8a-9792-de73be016dbf>
backing-store /dev/cinder-volumes/volume-dbdff91c-c332-4c8a-9792-de73be016dbf
lld iscsi
IncomingUser 9uGVZUbr6qkBDnyWDi7m uD9VZGfmQDJ9u7Vg2mYX
</target>
compute:
/var/log/nova/compute.log
2017-01-16 17:13:04.326 34993 ERROR oslo.messaging._drivers.common [-] ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply\n incoming.message))\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch\n return self._do_dispatch(endpoint, method, ctxt, args)\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch\n result = getattr(endpoint, method)(ctxt, **new_args)\n', ' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 410, in decorated_function\n return function(self, context, *args, **kwargs)\n', ' File "/usr/lib/python2.6/site-packages/nova/exception.py", line 88, in wrapped\n payload)\n', ' File "/usr/lib/python2.6/site-packages/nova/openstack/common/excutils.py", line 68, in __exit__\n six.reraise(self.type_, self.value, self.tb)\n', ' File "/usr/lib/python2.6/site-packages/nova/exception.py", line 71, in wrapped\n return f(self, context, *args, **kw)\n', ' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 291, in decorated_function\n LOG.warning(msg, e, instance_uuid=instance_uuid)\n', ' File "/usr/lib/python2.6/site-packages/nova/openstack/common/excutils.py", line 68, in __exit__\n six.reraise(self.type_, self.value, self.tb)\n', ' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 268, in decorated_function\n return function(self, context, *args, **kwargs)\n', ' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 320, in decorated_function\n e, sys.exc_info())\n', ' File "/usr/lib/python2.6/site-packages/nova/openstack/common/excutils.py", line 68, in __exit__\n six.reraise(self.type_, self.value, self.tb)\n', ' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 307, in decorated_function\n return function(self, context, *args, **kwargs)\n', ' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 4236, in attach_volume\n bdm.destroy(context)\n', ' File "/usr/lib/python2.6/site-packages/nova/openstack/common/excutils.py", line 68, in __exit__\n six.reraise(self.type_, self.value, self.tb)\n', ' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 4233, in attach_volume\n return self._attach_volume(context, instance, driver_bdm)\n', ' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 4254, in _attach_volume\n self.volume_api.unreserve_volume(context, bdm.volume_id)\n', ' File "/usr/lib/python2.6/site-packages/nova/openstack/common/excutils.py", line 68, in __exit__\n six.reraise(self.type_, self.value, self.tb)\n', ' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 4246, in _attach_volume\n do_check_attach=False, do_driver_attach=True)\n', ' File "/usr/lib/python2.6/site-packages/nova/virt/block_device.py", line 45, in wrapped\n ret_val = method(obj, context, *args, **kwargs)\n', ' File "/usr/lib/python2.6/site-packages/nova/virt/block_device.py", line 258, in attach\n connector)\n', ' File "/usr/lib/python2.6/site-packages/nova/openstack/common/excutils.py", line 68, in __exit__\n six.reraise(self.type_, self.value, self.tb)\n', ' File "/usr/lib/python2.6/site-packages/nova/virt/block_device.py", line 249, in attach\n device_type=self[\'device_type\'], encryption=encryption)\n', ' File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/driver.py", line 1242, in attach_volume\n disk_info)\n', ' File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/driver.py", line 1201, in volume_driver_method\n return method(connection_info, *args, **kwargs)\n', ' File "/usr/lib/python2.6/site-packages/nova/openstack/common/lockutils.py", line 249, in inner\n return f(*args, **kwargs)\n', ' File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/volume.py", line 314, in connect_volume\n self._run_iscsiadm(iscsi_properties, ("--rescan",))\n', ' File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/volume.py", line 247, in _run_iscsiadm\n check_exit_code=check_exit_code)\n', ' File "/usr/lib/python2.6/site-packages/nova/utils.py", line 165, in execute\n return processutils.execute(*cmd, **kwargs)\n', ' File "/usr/lib/python2.6/site-packages/nova/openstack/common/processutils.py", line 195, in execute\n cmd=sanitized_cmd)\n', "ProcessExecutionError: Unexpected error while running command.\nCommand: sudo nova-rootwrap /etc/nova/rootwrap.conf iscsiadm -m node -T iqn.2010-10.org.openstack:volume-dbdff91c-c332-4c8a-9792-de73be016dbf -p 10.5.0.51:3260 --rescan\nExit code: 21\nStdout: u''\nStderr: u'iscsiadm: No session found.\\n'\n"]
I'll need some details on how you set this up, maybe your config files, some specifics around drivers etc. I've tried restarts of c-vol service and not seeing issues. Maybe some more detail?