Error Compute API - Live-Migrate Server

[Marcio Feliciano do Prado]

Good afternoon,

I'm experiencing difficulties with Computing API.

When I migrate VMs by command line everything works fine.

According to the command: openstack server migrate 7ca6ee39-bab1-422c-a19f-1b73d2aeaf31 --live compute1 (OK)

But when I try to migrate through the API I get the following error:

{"computeFault": {"message": "Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.\n<type 'exceptions.KeyError'>", "code": 500}}

To request a migration through the API I am using the following Json:

Note: The variable $ TOKEN_AUTENTICACAO is all right, already testing.

        curl -s -H "Content-Type: application/json" -H "X-Auth-Token: $TOKEN_AUTENTICACAO" \
 -X POST http://controller:8774/v2/servers/7ca6ee39-bab1-422c-a19f-1b73d2aeaf31/action \
        -d '{
                "os-migrateLive": {
                        "host": "compute3",
                        "block_migration": "auto",
                        "force": false
                }
        }'

Can someone help me please? Sorry for English, I'm Brazilian.

Follow the /var/log/nova/nova-api.log log

2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions [req-2e1b20c9-ca88-47b1-8ed3-976ad50c3f6e 77fe89f8145846bf9240428144f96fba 00e4a214dab74548b8728df515a2a9d7 - default default] Unexpected exception in API method
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions Traceback (most recent call last):
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/openstack/extensions.py", line 338, in wrapped
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions return f(*args, **kwargs)
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 108, in wrapper
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions return func(*args, **kwargs)
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 108, in wrapper
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions return func(*args, **kwargs)
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 108, in wrapper
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions return func(*args, **kwargs)
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/migrate_server.py", line 90, in _migrate_live
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions disk_over_commit = body["os-migrateLive"]["disk_over_commit"]
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions KeyError: 'disk_over_commit'
2018-02-01 17:54:34.413 3532 ERROR nova.api.openstack.extensions
2018-02-01 17:54:34.414 3532 INFO nova.api.openstack.wsgi [req-2e1b20c9-ca88-47b1-8ed3-976ad50c3f6e 77fe89f8145846bf9240428144f96fba 00e4a214dab74548b8728df515a2a9d7 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<type 'exceptions.KeyError'>
2018-02-01 17:54:34.415 3532 INFO nova.osapi_compute.wsgi.server [req-2e1b20c9-ca88-47b1-8ed3-976ad50c3f6e 77fe89f8145846bf9240428144f96fba 00e4a214dab74548b8728df515a2a9d7 - default default] 10.0.0.2 "POST /v2/servers/74eb35a6-e9f5-4f44-b058-63dab362fc2e/action HTTP/1.1" status: 500 len: 399 time: 0.0144310

[Marcio Feliciano do Prado (marcio.prado)]

I forgot to say, I'm using Ocata and Ubuntu Server.

[Matt Riedemann (mriedem)]

Your English is excellent, thank you for the detailed bug report. :)

The CLI will make the request at version 2.1 and pass in defaults for you most likely.

It looks like the issue is that you're making a 2.1 request and not providing an entry for "disk_over_commit":

https://developer.openstack.org/api-ref/compute/#live-migrate-server-os-migratelive-action

That field was dropped from the request in microversion 2.25, but until then you have to specify it:

https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#maximum-in-mitaka

We shouldn't get a KeyError though, that looks like a bug in the request API jsonschema validation.

[Matt Riedemann (mriedem)]

This all looks correct to me:

https://github.com/openstack/nova/blob/d189e682277b4b5d5b70c46a2ad065e29ccccb22/nova/api/openstack/compute/schemas/migrate_server.py#L48

You should have gotten a 400 response rather than a 500. My guess is you were hitting the legacy v2 API code which didn't use jsonschema validation and that's why you got a 500 error. That code is gone now and you should be hitting the 2.1 endpoint.

OSC defaults disk_over_commit=False:

https://github.com/openstack/python-openstackclient/blob/stable/ocata/openstackclient/compute/v2/server.py#L1054

So retry your request with that, or use microversion>=2.25.

[Matt Riedemann (mriedem)]

Oh here we go:

https://review.openstack.org/#/c/479197/

You need that fix which is in 15.0.7.

[Marcio Feliciano do Prado (marcio.prado)]

Thank.

The problem really was the "disk_over_commit".

I added and it worked normally ...

That's why I like Linux ... The community is grade 10!

Hugs.