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====== Recover a stuck cinder Volume ======

Adapted from [[https://raymii.org/s/articles/Fix_inconsistent_Openstack_volumes_and_instances_from_Cinder_and_Nova_via_the_database.html]]



==== List the volumes ====

<code>
$ . ~/keystone_admin.sh
$ nova volume-list --all-tenants
+--------------------------------------+-----------+--------------+------+--------------+--------------------------------------+
| ID                                   | Status    | Display Name | Size | Volume Type  | Attached to                          |
+--------------------------------------+-----------+--------------+------+--------------+--------------------------------------+
| f480ca6a-0b52-499c-94ab-461be861c7fa | available | Biocomp2     | 200  | bulk_storage |                                      |
| 7d95cdc2-69fd-4b39-ae89-2abbfdf9bb7f | available | test         | 20   | bulk_storage |                                      |
| 24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1 | in-use    | Biocomp      | 200  | bulk_storage | 002dc79b-9050-459c-9ec3-f3a53b4bb1fb |  <== THIS IS THE BAD GUY
| 86a39713-50ba-4885-8fdc-9d7cdf3d16a8 | in-use    | swap_volume  | 16   | bulk_storage | 55778ac6-e39e-4760-bbcb-7a7551f7a482 |
| 1fb65656-f358-4ab8-8baa-fb0c48a0e18d | in-use    | data-1       | 500  | bulk_storage | 55778ac6-e39e-4760-bbcb-7a7551f7a482 |
| 6feb1a3b-2257-4c3d-84f9-24a476ea64c6 | available | test         | 1    | bulk_storage |                                      |
+--------------------------------------+-----------+--------------+------+--------------+--------------------------------------+
</code>

  * Try to detach it the 'normal' way
<code>
$ nova volume-detach 002dc79b-9050-459c-9ec3-f3a53b4bb1fb 24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1
ERROR: The resource could not be found. (HTTP 404) (Request-ID: req-8ecd1359-f5ae-440f-96cf-f8f8217cdff6)
</code>
NOTE: the operation failed maybe because the VM ''002dc79b-9050-459c-9ec3-f3a53b4bb1fb'' was already destroyed.

==== Find the volume on the iscsi storage using Volume-Display-Name ====
==== KILO release cinderDB ====

      * Connect to the mysql db
<code>
mysql -u root -p
mysql> use cinder;
        
Database changed
mysql> SELECT * from volumes where display_name = 'orar-data';
mysql> SELECT id,size,status,attach_status,display_name from volumes where display_name = 'orar-data';
+--------------------------------------+------+-----------+---------------+--------------+
| id                                   | size | status    | attach_status | display_name |
+--------------------------------------+------+-----------+---------------+--------------+
| f4f7de64-7323-43ac-93f6-48d2314cfa6e | 3000 | in-use    | attached      | orar-data    |
+--------------------------------------+------+-----------+---------------+--------------+
1 row in set (0.00 sec)

mysql> update volumes SET status="available", attach_status="detached" where id="f4f7de64-7323-43ac-93f6-48d2314cfa6e";
mysql> SELECT id,size,status,attach_status,display_name from volumes where display_name = 'orar-data';
+--------------------------------------+------+-----------+---------------+--------------+
| id                                   | size | status    | attach_status | display_name |
+--------------------------------------+------+-----------+---------------+--------------+
| f4f7de64-7323-43ac-93f6-48d2314cfa6e | 3000 | available | detached      | orar-data    |
+--------------------------------------+------+-----------+---------------+--------------+
1 row in set (0.00 sec)

mysql> quit;
</code>

==== Find the volume on the iscsi storage ====

      * Connect to the mysql db
<code>
mysql -u root -p
mysql> use cinder;
        
Database changed
mysql> set @volid='24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1';
mysql> select project_id,size,instance_uuid,mountpoint from volumes where id=@volid;
+----------------------------------+------+--------------------------------------+------------+
| project_id                       | size | instance_uuid                        | mountpoint |
+----------------------------------+------+--------------------------------------+------------+
| cc6353c145fd49adb7564e2ebe4f3f91 |  200 | 002dc79b-9050-459c-9ec3-f3a53b4bb1fb | /dev/vdb   |
+----------------------------------+------+--------------------------------------+------------+
1 row in set (0.00 sec)

mysql> select display_name,display_description,provider_location from volumes where id=@volid;
+--------------+---------------------+------------------------------------------------------------------------------------------------------------------------------------+
| display_name | display_description | provider_location                                                                                                                  |
+--------------+---------------------+------------------------------------------------------------------------------------------------------------------------------------+
| Biocomp      | biocomp's storage   | 192.168.40.100:3260,1 iqn.2001-05.com.equallogic:0-fe83b6-a257200c3-d4200647e175661c-volume-24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1 0 |
+--------------+---------------------+------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
</code>
**volume-24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1**  is the name of the volume on the iscsi storage.

   * Connect to the iscsi storage from cld-blu-01 or cld-blu-02
<code>
$ ssh grpadmin@172.16.36.13
grpadmin@172.16.36.13's password: 
Last login: Mon Dec 14 09:55:50 2015 from 192.168.40.120 on tty??
 

           Welcome to Group Manager

        Copyright 2001-2014 Dell Inc.



CloudUnipdVeneto>
</code>
   * create a copy of the volume (just for security)
<code>
CloudUnipdVeneto> vol show
Name            Size       Snapshots Status  Permission Connections T
--------------- ---------- --------- ------- ---------- ----------- -
volume-6feb1a3b 1GB        0         online  read-write 0           Y 
  -2257-4c3d-84                                                       
  f9-24a476ea64                                                       
  c6                                                                  
volume-1fb65656 500GB      0         online  read-write 1           Y 
  -f358-4ab8-8b                                                       
  aa-fb0c48a0e1                                                       
  8d                                                                  
volume-86a39713 16GB       0         online  read-write 1           Y 
  -50ba-4885-8f                                                       
  dc-9d7cdf3d16                                                       
  a8                                                                  
volume-24aa5fc3 200GB      1         online  read-write 0           Y 
  -0f08-4910-a3                                                       
  54-6ed4d1fe8e                                                       
  a1
...
...
CloudUnipdVeneto> vol select volume-24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1
CloudUnipdVeneto(volume_volume-24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1)> clone copy-of-24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1
Volume creation succeeded.
iSCSI target name is iqn.2001-05.com.equallogic:0-fe83b6-a257200c3-d4200647e175661c-copy-of-24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1
CloudUnipdVeneto(volume_volume-24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1)> exit
CloudUnipdVeneto> logout
</code>
==== Make a copy of the volume from the dashboard ====

Access the Project's volumes and click on "Create volume"

{{:progetti:cloud-areapd:ced-c:operations:new-vol-red.png|}}



==== Try to use the copy the normal way ====

  * Attach the volume to a working VM
  * Check the contents are fine
  * Detach the volume

==== Manually detach the stuck volume via DB ====

<code>
$ mysql -u root -p
mysql> set @volid='24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1';
Query OK, 0 rows affected (0.01 sec)

mysql> set @instance='002dc79b-9050-459c-9ec3-f3a53b4bb1fb';
Query OK, 0 rows affected (0.01 sec)

mysql> use nova;
Database changed
mysql> delete from block_device_mapping where not deleted and volume_id=@volid and instance_uuid=@instance;
Query OK, 1 rows affected (0.01 sec)

mysql> use cinder;
Database changed
mysql> select instance_uuid,attach_time,status,attach_status,mountpoint from volumes where id=@volid;
+--------------------------------------+----------------------------+--------+---------------+------------+
| instance_uuid                        | attach_time                | status | attach_status | mountpoint |
+--------------------------------------+----------------------------+--------+---------------+------------+
| 002dc79b-9050-459c-9ec3-f3a53b4bb1fb | 2015-12-10T09:27:18.192892 | in-use | attached      | /dev/vdb   |
+--------------------------------------+----------------------------+--------+---------------+------------+
mysql> update volumes set instance_uuid=NULL,attach_time=NULL,status='available',attach_status='detached',mountpoint=NULL where id=@volid;
Query OK, 1 rows affected (0.01 sec)
</code>


==== Check the volume is again available ====

<code>
$ nova volume-list --all-tenants
+--------------------------------------+-----------+--------------+------+--------------+--------------------------------------+
| ID                                   | Status    | Display Name | Size | Volume Type  | Attached to                          |
+--------------------------------------+-----------+--------------+------+--------------+--------------------------------------+
| f480ca6a-0b52-499c-94ab-461be861c7fa | available | Biocomp2     | 200  | bulk_storage |                                      |
| 7d95cdc2-69fd-4b39-ae89-2abbfdf9bb7f | available | test         | 20   | bulk_storage |                                      |
| 24aa5fc3-0f08-4910-a354-6ed4d1fe8ea1 | available | Biocomp      | 200  | bulk_storage |                                      |  <== THIS *WAS* THE BAD GUY
| 86a39713-50ba-4885-8fdc-9d7cdf3d16a8 | in-use    | swap_volume  | 16   | bulk_storage | 55778ac6-e39e-4760-bbcb-7a7551f7a482 |
| 1fb65656-f358-4ab8-8baa-fb0c48a0e18d | in-use    | data-1       | 500  | bulk_storage | 55778ac6-e39e-4760-bbcb-7a7551f7a482 |
| 6feb1a3b-2257-4c3d-84f9-24a476ea64c6 | available | test         | 1    | bulk_storage |                                      |
+--------------------------------------+-----------+--------------+------+--------------+--------------------------------------+
</code>

==== Delete the original volume / rename the copy ====

It should be now possible to delete the volume from the dashboard. This is **necessary** because the volume has somewhat become //toxic//, e.g. if you try to use it again it will again become stuck. Since you made a copy (actually two of them...) it should be safely deleted.

After that you can use the dashboard to rename the volume copy after the original one.

==== Transfer ownership of the volume! ====

Since you created the volume as the admin the ownership of the volume is 'admin'.

You must transfer the ownership to the user which created the original one. To perform such task:

  * As the admin user:
  - **Modify the 'Volume quota' for the project if necessary**: during the ownership transfer the volume is initially duplicated so extra space is allocated (and then freed). Quota can be safely restored after the procedure ends;
  - Download the rc file of the project and the {{:progetti:cloud-areapd:ced-c:operations:chain.pem.gz|chain.pem}} file (gunzip it)
  - Modify the rc file: put the chain.pem file in the same directory and add ''export OS_CACERT=./chain.pem'' inside the rc file
  - Source the rc file and list the project volume: <code>
$ . testing-openrc-admin.sh
Please enter your OpenStack Password:

$ cinder list
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
|                  ID                  |   Status  | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
| a79bbf87-112b-471b-bd0c-6d938da57b4c | available |     uno      |  5   |     None    |  false   |             |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
</code>
  - Create a transfer request for the volume<code>
$ cinder transfer-create a79bbf87-112b-471b-bd0c-6d938da57b4c
+------------+--------------------------------------+
|  Property  |                Value                 |
+------------+--------------------------------------+
|  auth_key  |           a182392984ce82b7           |
| created_at |      2015-12-16T14:08:37.374753      |
|     id     | d01cf5a1-5e3d-466a-9f4e-0efcca8e818c |
|    name    |                 None                 |
| volume_id  | a79bbf87-112b-471b-bd0c-6d938da57b4c |
+------------+--------------------------------------+
</code>
  - Mail the **id** and **auth_key** to the new owner (''d01cf5a1-5e3d-466a-9f4e-0efcca8e818c'' and ''a182392984ce82b7'' in this case) 
  *As the new user
  - Set a password for your user. The rc file doesn't work through the SSO mechanism;
  - Download the rc file and the {{:progetti:cloud-areapd:ced-c:operations:chain.pem.gz|chain.pem}} file (gunzip it)
  - Modify the rc file: put the chain.pem file in the same directory and add export ''OS_CACERT=./chain.pem'' inside the rc file
  - Source the rc file and accept the transfer:<code>
$ . testing-openrc-admin.sh
Please enter your OpenStack Password:

$ cinder transfer-accept d01cf5a1-5e3d-466a-9f4e-0efcca8e818c a182392984ce82b7
+-----------+--------------------------------------+
|  Property |                Value                 |
+-----------+--------------------------------------+
|     id    | d01cf5a1-5e3d-466a-9f4e-0efcca8e818c |
|    name   |                 None                 |
| volume_id | a79bbf87-112b-471b-bd0c-6d938da57b4c |
+-----------+--------------------------------------+
</code>