Tempest tests test_auto_allocate_network.AutoAllocateNetworkTest fail with Unsupported API version

[Anna Babich]

The bug has been reproduced against env with MOS 9.1, snapshot #261:
[root@nailgun ~]# fuel node
id | status | name | cluster | ip | mac | roles | pending_roles | online | group_id
---+--------+------------------+---------+-------------+-------------------+-----------------+---------------+--------+---------
 3 | ready | Untitled (59:4c) | 1 | 10.109.16.5 | 4a:be:b7:a2:ff:6a | cinder, compute | | 1 | 1
 1 | ready | Untitled (7c:9a) | 1 | 10.109.16.4 | 64:ec:36:4c:7c:9a | controller | | 1 | 1
 2 | ready | Untitled (1b:7c) | 1 | 10.109.16.3 | 64:1b:28:cd:1b:7c | cinder, compute | | 1 | 1
[root@nailgun ~]#

The maximum available API version:
root@node-1:~# nova version-list | awk '/Maximum version/{print $3}'
2.25

The settings in tempest.conf:
[compute]
min_compute_nodes = 2
min_microversion = 2.1
max_microversion = latest
...

When running the tempest.api.compute.admin.test_auto_allocate_network.AutoAllocateNetworkTest.test_server_multi_create_auto_allocate and *.test_server_create_no_allocate tempest tests against described configuration, they fail with tracebacks like:

FAIL: tempest.api.compute.admin.test_auto_allocate_network.AutoAllocateNetworkTest.test_server_multi_create_auto_allocate
Time: 0.033
--------------------------------------------------------------------------------
Traceback (most recent call last):
  File "tempest/api/compute/admin/test_auto_allocate_network.py", line 183, in test_server_multi_create_auto_allocate
    min_count=3)
  File "tempest/common/compute.py", line 129, in create_test_server
    **kwargs)
  File "tempest/lib/services/compute/servers_client.py", line 78, in create_server
    resp, body = self.post('servers', post_body)
  File "tempest/lib/common/rest_client.py", line 276, in post
    return self.request('POST', url, extra_headers, headers, body, chunked)
  File "tempest/lib/services/compute/base_compute_client.py", line 48, in request
    method, url, extra_headers, headers, body, chunked)
  File "tempest/lib/common/rest_client.py", line 665, in request
    resp, resp_body)
  File "tempest/lib/common/rest_client.py", line 833, in _error_checker
    resp=resp)
tempest.lib.exceptions.UnexpectedResponseCode: Unexpected response code received
Details: 406

tempest.log:
2016-09-19 11:51:16.401 200 INFO tempest.lib.common.rest_client [req-985d0403-34b3-4fb1-8c78-fa6768444740 ] Request (AutoAllocateNetworkTest:test_server_multi_create_auto_allocate): 406 POST http://10.109.12.3:8774/v2.1/servers 0.030s
2016-09-19 11:51:16.401 200 DEBUG tempest.lib.common.rest_client [req-985d0403-34b3-4fb1-8c78-fa6768444740 ] Request - Headers: {'Content-Type': 'application/json', 'Accept': 'application/json', 'X-OpenStack-Nova-API-Version': '2.37', 'X-Auth-Token': '<omitted>'}
        Body: {"server": {"min_count": 3, "flavorRef": "0e28b496-ef35-4e20-a6d8-92a9585f0bb7", "networks": "auto", "imageRef": "d41fe272-05ee-4e97-b718-5b6ca52ff038", "name": "tempest.common.compute-instance-572218603"}}
    Response - Headers: {'status': '406', 'content-length': '123', 'content-location': 'http://10.109.12.3:8774/v2.1/servers', 'x-compute-request-id': 'req-985d0403-34b3-4fb1-8c78-fa6768444740', 'vary': 'X-OpenStack-Nova-API-Version', 'connection': 'close', 'x-openstack-nova-api-version': '2.37', 'date': 'Mon, 19 Sep 2016 11:51:16 GMT', 'content-type': 'application/json; charset=UTF-8'}
        Body: {"computeFault": {"message": "Version 2.37 is not supported by the API. Minimum is 2.1 and maximum is 2.25.", "code": 406}} _log_request_full tempest/lib/common/rest_client.py:431

Investigation of Tempest configurations and Tempest tests' results against upstream gate jobs (gate-tempest-dsvm-neutron-full-ubuntu-trusty-mitaka etc.) showed that these tests are skipped at the moment with the same reason as they fail here. This skipping is provided by the use of actual maximum API microversion instead of 'latest' parameter in current tempest.conf.
After replacing 'max_microversion = latest' with 'max_microversion = 2.25', the tests were skipped correctly. So, we need to carry actual maximum version of microversion API from Nova to tempest.conf

[Oleksiy Butenko (obutenko)]

https://review.gerrithub.io/#/c/294973/

[Anna Babich (ababich)]

The proposed patch - https://review.gerrithub.io/#/c/294973/

[Oleksiy Butenko (obutenko)]

verified on 9.1 snapshot #294