On Fri, Jul 25, 2014 at 2:03 AM, zhangtralon <ztra...@hotmail.com> wrote:
> Hi > > Here,there is a problem to discuss with you. > This sounds like a bug. We use https://bugs.launchpad.net/nova/ to track bugs and discuss possible solutions etc. > *Problem:* a volume may leave over when we delete an instance > > > > *Description*:Here, two scenes may cause that a volume is legacy when we > delete instance whose task_state is block_device_mapping .The first scene > is that using the boot volume created by image creates instance; The other > scene is that using image create instance with a volume created through a > image. > > > *Reason:*Through analyzing, we find that the volume id is not update to > block_device_mapping table in DB until a volume created by an image > through setting parameters in Blocking Device Mapping v2 is attached to an > instance completely.If we delete the instance before the volume id is not > update to the block_device_mapping table, the problem mentioned above > will occur. > > > Although the reason of the problem is found, I want to discuss > the solution about it with you > > > Two examples to reproduce the problem on latest icehousce: > 1. the first scene > (1)root@devstack:~# nova list > +----+------+--------+------------+-------------+----------+ > | ID | Name | Status | Task State | Power State | Networks | > +----+------+--------+------------+-------------+----------+ > +----+------+--------+------------+-------------+----------+ > (2)root@devstack:~# nova boot --flavor m1.tiny --block-device id=61ebee75- > 5883-49a3-bf85-ad6f6c29fc1b,source=image,dest=volume,device=vda,size= > 1,shutdown=removed,bootindex=0 --nic net-id=354ba9ac-e6a7-4fd6- > a49f-6ae18a815e95 tralon_test > root@devstack:~# nova list > +--------------------------------------+-------------+--------+------- > ---------------+-------------+-------------------+ > | ID | Name | Status | Task State | Power State | Networks | > +--------------------------------------+-------------+--------+------- > ---------------+-------------+-------------------+ > | 57cbb39d-c93f-44eb-afda-9ce00110950d | tralon_test | BUILD | > block_device_mapping | NOSTATE | private=10.0.0.20 | > +--------------------------------------+-------------+--------+------- > ---------------+-------------+-------------------+ > (3)root@devstack:~# nova delete tralon_test > root@devstack:~# nova list > +----+------+--------+------------+-------------+----------+ > | ID | Name | Status | Task State | Power State | Networks | > +----+------+--------+------------+-------------+----------+ > +----+------+--------+------------+-------------+----------+ > (4) root@devstack:~# cinder list > +--------------------------------------+-----------+------+------+---- > ---------+----------+--------------------------------------+ > | ID | Status | Name | Size | Volume Type | Bootable | Attached to | > +--------------------------------------+-----------+------+------+---- > ---------+----------+--------------------------------------+ > | 3e5579a9-5aac-42b6-9885-441e861f6cc0 | available | None | 1 | None | > false | | > | a4121322-529b-4223-ac26-0f569dc7821e | available | | 1 | None | true | | > | a7ad846b-8638-40c1-be42-f2816638a917 | in-use | | 1 | None | true | > 57cbb39d-c93f-44eb-afda-9ce00110950d | > +--------------------------------------+-----------+------+------+---- > ---------+----------+--------------------------------------+ > we can see that the instance 57cbb39d-c93f-44eb-afda-9ce00110950d was > deleted while the volume still exists with the "in-use" status > > 2. the scend scene > (1)root@devstack:~# nova list > +----+------+--------+------------+-------------+----------+ > | ID | Name | Status | Task State | Power State | Networks | > +----+------+--------+------------+-------------+----------+ > +----+------+--------+------------+-------------+----------+ > (2)root@devstack:~# nova boot --flavor m1.tiny --image 61ebee75-5883-49a3- > bf85-ad6f6c29fc1b --nic net-id=354ba9ac-e6a7-4fd6-a49f-6ae18a815e95 > --block-device id=61ebee75-5883-49a3-bf85-ad6f6c29fc1b,source=image,dest= > volume,device=vdb,size=1,shutdown=removed tralon_image_instance > root@devstack:~# nova list > +--------------------------------------+-----------------------+------ > --+----------------------+-------------+-------------------+ > | ID | Name | Status | Task State | Power State | Networks | > +--------------------------------------+-----------------------+------ > --+----------------------+-------------+-------------------+ > | 25bcfe84-0c3f-40d3-a917-4791e092fa06 | tralon_image_instance | BUILD | > block_device_mapping | NOSTATE | private=10.0.0.26 | > +--------------------------------------+-----------------------+------ > --+----------------------+-------------+-------------------+ > (3)root@devstack:~# nova delete 25bcfe84-0c3f-40d3-a917-4791e092fa06 > ( 4 ) root@devstack:~# nova list > +----+------+--------+------------+-------------+----------+ > | ID | Name | Status | Task State | Power State | Networks | > +----+------+--------+------------+-------------+----------+ > +----+------+--------+------------+-------------+----------+ > (5) root@devstack:~# cinder list > +--------------------------------------+-----------+------+------+---- > ---------+----------+--------------------------------------+ > | ID | Status | Name | Size | Volume Type | Bootable | Attached to | > +--------------------------------------+-----------+------+------+---- > ---------+----------+--------------------------------------+ > | 3e5579a9-5aac-42b6-9885-441e861f6cc0 | available | None | 1 | None | > false | | > | a7ad846b-8638-40c1-be42-f2816638a917 | in-use | | 1 | None | true | > 57cbb39d-c93f-44eb-afda-9ce00110950d | > | f3df0f15-6c9d-4084-8fb5-dc2826bf3eb0 | in-use | | 1 | None | true | > 25bcfe84-0c3f-40d3-a917-4791e092fa06 | > +--------------------------------------+-----------+------+------+---- > ---------+----------+--------------------------------------+ > so, the instance 25bcfe84-0c3f-40d3-a917-4791e092fa06 was deleted while > the volume f3df0f15-6c9d-4084-8fb5-dc2826bf3eb0 still exists with the > "in-use" status > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > >
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