Cinder API v2 - os-attach fails without mountpoint specified

[Eric Smith]

URL = http://os-host:8776/v2/tenant-id/volumes/volume-id/action
{"os-attach" : {"instance_uuid" : "instance-id"}}
HTTP Status code = 500
Response text = {"computeFault": {"message": "The server has either erred or is incapable of performing the requested operation.", "code": 500}}

This works when specifying a mount point. Here are the logs from cinder-api.log:

./api.log:2016-04-27 09:06:57.765 4955 INFO cinder.api.openstack.wsgi [req-894e2162-cc96-4b41-a674-5b4aad0d5823 b36b3bc78c7848cb89b3919cabbf3752 tenant-id - - -] POST http://os-host:8776/v2/tenant-id/volumes/volume-id/action
./api.log:2016-04-27 09:06:57.803 4955 ERROR cinder.api.middleware.fault [req-894e2162-cc96-4b41-a674-5b4aad0d5823 b36b3bc78c7848cb89b3919cabbf3752 tenant-id - - -] Caught error: 'mountpoint'
./api.log:2016-04-27 09:06:57.803 4955 INFO cinder.api.middleware.fault [req-894e2162-cc96-4b41-a674-5b4aad0d5823 b36b3bc78c7848cb89b3919cabbf3752 tenant-id - - -] http://os-host:8776/v2/tenant-id/volumes/volume-id/action returned with HTTP 500
./api.log:2016-04-27 09:06:57.804 4955 INFO eventlet.wsgi.server [req-894e2162-cc96-4b41-a674-5b4aad0d5823 b36b3bc78c7848cb89b3919cabbf3752 tenant-id - - -] os-host - - [27/Apr/2016 09:06:57] "POST /v2/tenant-id/volumes/volume-id/action HTTP/1.1" 500 425 0.

[Mitsuhiro Tanino (mitsuhiro-tanino)]

In the API reference guide(http://developer.openstack.org/api-ref-blockstorage-v2.html), the mountpoint is a optional parameter, but contrib/volume_actions.py expects mountpoint is included in the request body.

Seems mountpoint is used as only debug logging purpose at attach_volume in manager.py, so we may make the "mountpoint" as an optional.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/313180

[Mitsuhiro Tanino (mitsuhiro-tanino)]

New attach/detach API call is proposed and under discussion now.
I'll keep open this bug until the discussion will be concluded.

Add new attach/detach API calls
https://review.openstack.org/#/c/327408/

[OpenStack Infra (hudson-openstack)]

Change abandoned by Mitsuhiro Tanino (<email address hidden>) on branch: master
Review: https://review.openstack.org/313180

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/449223

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/449223
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=6b04a764cb3abd6820d505c2aab7630b7b4205e5
Submitter: Jenkins
Branch: master

commit 6b04a764cb3abd6820d505c2aab7630b7b4205e5
Author: Matt Riedemann <email address hidden>
Date: Thu Mar 23 12:49:30 2017 -0400

    Fix 500 error when 'mountpoint' is not provided to os-attach

    This fixes the 500 resulting from the KeyError when mountpoint
    is not provided during an os-attach call. It also fixes the
    API reference docs to no longer lie about mountpoint being
    an optional parameter.

    Change-Id: Ica9ccb0246bc84c087afc338b5102ce48f57e82b
    Closes-Bug: #1575675

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/cinder 11.0.0.0b1 development milestone.