Openstack cinder volumes are created and the ISCSI daemon creates a target for
them, however when one tries to attach such volume to an instance, in the user
interface of Openstack the volumes goes to the status attaching and then it
comes back to the status available, instead of presenting the attached status
as a normal operation would make it.
Logging information
In the compute nodes where the instance where the volumes was supposed to be
attached, one will find this entry (the following example includes timestamps
and nodes that are might not be accurate in your environment)
2013-10-09 09:53:48.905 27767 TRACE nova.openstack.common.rpc.amqp
ProcessExecutionError: Unexpected error while running command.
2013-10-09 09:53:48.905 27767 TRACE nova.openstack.common.rpc.amqp Command:
sudo nova-rootwrap /etc/nova/rootwrap.conf iscsiadm -m node -T
iqn.2010-10.org.openstack:volume-7817aa43-755e-43b7-8959-092515c0910c -p
172.20.2.27:3260 --rescan
2013-10-09 09:53:48.905 27767 TRACE nova.openstack.common.rpc.amqp Exit code: 21
2013-10-09 09:53:48.905 27767 TRACE nova.openstack.common.rpc.amqp Stdout: ''
2013-10-09 09:53:48.905 27767 TRACE nova.openstack.common.rpc.amqp Stderr:
'iscsiadm: No session found.\n'
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