** Changed in: cinder
Status: In Progress => Invalid
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https://bugs.launchpad.net/bugs/1432963
Title:
Volume of 'in-use' remain by a timeout during the attach
Status in Cinder:
Invalid
Status in OpenStack Compute (nova):
In Progress
Bug description:
Remain as the 'in-use' volume due to timeout during the 'attach'.
If the problem occurs, The instance can't detach/attach the volume.
detach -> volume_id not found
attach -> libvirtError: Requested operation is not valid: target vdb
already exists
(other volume)
This problems are caused by the mismatching DB because c-vol does not
rollback it when happend the timeout of RPC(CALL).
At first, c-vol takes time in the attaching process, and the attaching
process failed in the c-api by timeout.
But in this time, the attaching process does not failed yet in the c-vol.
By this, BDM is deleted and volume is updated to in-use.
(If successful the attaching process in the c-vol.)
<Repro>
used master
cinder: commit d4b77484c5d41f207d54f40dcdd530fb8a1b1ea6
nova : commit eaeecdaf4743463888c3ee24fb08128eac15dee7
1. attach volume
(in cinder/volume/manage.py def attach_volume)
note: I reproduced this problem by inserting sleep in this method.
2. RPC(CALL) timeout in the c-api(attach_volume process takes time beyond the
rpc_response_timeout)
<About the volume and BDM >
block_device_mapping
+---------------------+----+-------------+-----------------------+--------------------------------------+-----------------+--------------------------------------+---------+
| deleted_at | id | device_name | delete_on_termination | volume_id
| connection_info | instance_uuid
| deleted |
+---------------------+----+-------------+-----------------------+--------------------------------------+-----------------+--------------------------------------+---------+
| NULL | 1 | /dev/vda | 1 | NULL
| NULL |
4683d4fb-758c-459e-9def-b8d247a56954 | 0 |
| 2015-03-17 06:12:36 | 2 | /dev/vdb | 0 |
46d1bfbb-bdf2-472f-8bf6-2d2367b1edb1 | NULL |
4683d4fb-758c-459e-9def-b8d247a56954 | 2 |
+---------------------+----+-------------+-----------------------+--------------------------------------+-----------------+--------------------------------------+---------+
volumes
+------------+---------+--------------------------------------+--------+---------------+---------------+-----------------------------------------------------------------------------------------------+--------------------------------------------+
| deleted_at | deleted | id | status |
attach_status | terminated_at | provider_location
| provider_auth
|
+------------+---------+--------------------------------------+--------+---------------+---------------+-----------------------------------------------------------------------------------------------+--------------------------------------------+
| NULL | 0 | 46d1bfbb-bdf2-472f-8bf6-2d2367b1edb1 | in-use |
attached | NULL | 192.168.58.172:3260,4
iqn.2010-10.org.openstack:volume-46d1bfbb-bdf2-472f-8bf6-2d2367b1edb1 1 | CHAP
2W7r5XQcZJ5BHVctM8YY NogCxmq4VswXWHWE |
+------------+---------+--------------------------------------+--------+---------------+---------------+-----------------------------------------------------------------------------------------------+--------------------------------------------+
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