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cinder volume attachment error - keystoneclient.exceptions.EndpointNotFound (HTTP 500)

Hi!

I installed the openstack liberty version, and os is Ubuntu 14.0.4.
It does everything well except for one thing. The problem is 'volume attachment'.
After the volume is created, it is not attached to the instance.
What should I do?


this is volume list.

root@woojin-virtual-machine:/home/woojin# cinder list
+--------------------------------------+-----------+------------------+------------+------+-------------+----------+-------------+-------------+
|                  ID                  |   Status  | Migration Status |    Name    | Size | Volume Type | Bootable | Multiattach | Attached to |
+--------------------------------------+-----------+------------------+------------+------+-------------+----------+-------------+-------------+
| a9f1fca8-58b7-4cbf-a5db-e74045fb6b76 | available |        -         | vdlp-agent |  5   |      -      |  false   |    False    |             |
+--------------------------------------+-----------+------------------+------------+------+-------------+----------+-------------+-------------+


Here is a list of instances:

root@woojin-virtual-machine:/home/woojin# nova list
+--------------------------------------+------------+---------+------------+-------------+------------------------------------+
| ID                                   | Name       | Status  | Task State | Power State | Networks                           |
+--------------------------------------+------------+---------+------------+-------------+------------------------------------+
| 0aa2e545-b798-4462-b383-884f63941595 | vDLP-Agent | SHUTOFF | -          | Shutdown    | Internal=10.22.0.11, 192.168.0.104 |
| 6e02c1ce-1a32-4211-ba58-df4ac4774a85 | vDLP_Repo  | SHUTOFF | -          | Shutdown    | Internal=10.22.0.10, 192.168.0.103 |
+--------------------------------------+------------+---------+------------+-------------+------------------------------------+


I used "nova volume-attach" command to attach the volume(vdlp-agent) to the instance (vdlp-agent).
But,

root@woojin-virtual-machine:/home/woojin# nova volume-attach 0aa2e545-b798-4462-b383-884f63941595 a9f1fca8-58b7-4cbf-a5db-e74045fb6b76 auto
ERROR (ClientException): Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'keystoneclient.exceptions.EndpointNotFound'> (HTTP 500) (Request-ID: req-a73ac487-b710-4b55-822a-683594785c83)


I also wanted to leave an error log in / var / log /, but no error log exists. What more should I check?