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# Copyright 2014 NEC Corporation. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
version interface
"""
from six.moves import urllib
from novaclient import base
from novaclient import exceptions as exc
class Version(base.Resource):
"""
Compute REST API information
"""
def __repr__(self):
return "<Version>"
class VersionManager(base.ManagerWithFind):
resource_class = Version
def _get_current(self):
"""Returns info about current version."""
# TODO(sdague): we've now got to make up to 3 HTTP requests to
# determine what version we are running, due to differences in
# deployments and versions. We really need to cache the
# results of this per endpoint and keep the results of it for
# some reasonable TTL (like 24 hours) to reduce our round trip
# traffic.
try:
# Assume that the value of get_endpoint() is something
# we can get the version of. This is a 404 for Nova <
# Mitaka if the service catalog contains project_id.
#
# TODO(sdague): add microversion for when this will
# change
url = "%s" % self.api.client.get_endpoint()
return self._get(url, "version")
except exc.NotFound:
# If that's a 404, we can instead try hacking together
# an endpoint root url by chopping off the last 2 /s.
# This is kind of gross, but we've had this baked in
# so long people got used to this hard coding.
#
# NOTE(sdague): many service providers don't really
# implement GET / in the expected way, if we do a GET
# /v2 that's actually a 300 redirect to
# /v2/... because of how paste works. So adding the
# end slash is really important.
url = "%s/" % url.rsplit("/", 1)[0]
return self._get(url, "version")
def get_current(self):
try:
return self._get_current()
except exc.Unauthorized:
# NOTE(sdague): RAX's repose configuration blocks access to the
# versioned endpoint, which is definitely non-compliant behavior.
# However, there is no defcore test for this yet. Remove this code
# block once we land things in defcore.
return None
def list(self):
"""List all versions."""
endpoint = self.api.client.get_endpoint()
url = urllib.parse.urlparse(endpoint)
# NOTE(andreykurilin): endpoint URL has at least 3 formats:
# 1. the classic (legacy) endpoint:
# http://{host}:{optional_port}/v{2 or 2.1}/{project-id}
# 2. starting from microversion 2.18 project-id is not included:
# http://{host}:{optional_port}/v{2 or 2.1}
# 3. under wsgi:
# http://{host}:{optional_port}/compute/v{2 or 2.1}
if (url.path.endswith("v2") or "/v2/" in url.path or
url.path.endswith("v2.1") or "/v2.1/" in url.path):
# this way should handle all 3 possible formats
path = url.path[:url.path.rfind("/v2")]
version_url = '%s://%s%s' % (url.scheme, url.netloc, path)
else:
# NOTE(andreykurilin): probably, it is one of the next cases:
# * https://compute.example.com/
# * https://example.com/compute
# leave as is without cropping.
version_url = endpoint
return self._list(version_url, "versions")
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