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# Copyright 2012 OpenStack Foundation
# 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.
import copy
from oslo_utils import encodeutils
from oslo_utils import strutils
import six
import six.moves.urllib.parse as urlparse
from escalatorclient.common import utils
from escalatorclient.openstack.common.apiclient import base
DEFAULT_PAGE_SIZE = 20
SORT_DIR_VALUES = ('asc', 'desc')
SORT_KEY_VALUES = ('name', 'auto_scale', 'id', 'created_at', 'updated_at')
OS_REQ_ID_HDR = 'x-openstack-request-id'
class Cluster(base.Resource):
def __repr__(self):
return "<Cluster %s>" % self._info
def data(self, **kwargs):
return self.manager.data(self, **kwargs)
class ClusterManager(base.ManagerWithFind):
resource_class = Cluster
def _list(self, url, response_key, obj_class=None, body=None):
resp, body = self.client.get(url)
if obj_class is None:
obj_class = self.resource_class
data = body[response_key]
return ([obj_class(self, res, loaded=True) for res in data if res],
resp)
def _cluster_meta_from_headers(self, headers):
meta = {'properties': {}}
safe_decode = encodeutils.safe_decode
for key, value in six.iteritems(headers):
value = safe_decode(value, incoming='utf-8')
if key.startswith('x-image-meta-property-'):
_key = safe_decode(key[22:], incoming='utf-8')
meta['properties'][_key] = value
elif key.startswith('x-image-meta-'):
_key = safe_decode(key[13:], incoming='utf-8')
meta[_key] = value
for key in ['is_public', 'protected', 'deleted']:
if key in meta:
meta[key] = strutils.bool_from_string(meta[key])
return self._format_cluster_meta_for_user(meta)
def _cluster_meta_to_headers(self, fields):
headers = {}
fields_copy = copy.deepcopy(fields)
# NOTE(flaper87): Convert to str, headers
# that are not instance of basestring. All
# headers will be encoded later, before the
# request is sent.
for key, value in six.iteritems(fields_copy):
headers['%s' % key] = utils.to_str(value)
return headers
@staticmethod
def _format_cluster_meta_for_user(meta):
for key in ['size', 'min_ram', 'min_disk']:
if key in meta:
try:
meta[key] = int(meta[key]) if meta[key] else 0
except ValueError:
pass
return meta
def get(self, cluster, **kwargs):
"""Get the metadata for a specific cluster.
:param cluster: host object or id to look up
:rtype: :class:`Cluster`
"""
cluster_id = base.getid(cluster)
resp, body = self.client.get('/v1/clusters/%s'
% urlparse.quote(str(cluster_id)))
# meta = self._cluster_meta_from_headers(resp.headers)
return_request_id = kwargs.get('return_req_id', None)
if return_request_id is not None:
return_request_id.append(resp.headers.get(OS_REQ_ID_HDR, None))
# return Host(self, meta)
return Cluster(self, self._format_cluster_meta_for_user(
body['cluster']))
def data(self, image, do_checksum=True, **kwargs):
"""Get the raw data for a specific image.
:param image: image object or id to look up
:param do_checksum: Enable/disable checksum validation
:rtype: iterable containing image data
"""
image_id = base.getid(image)
resp, body = self.client.get('/v1/images/%s'
% urlparse.quote(str(image_id)))
content_length = int(resp.headers.get('content-length', 0))
checksum = resp.headers.get('x-image-meta-checksum', None)
if do_checksum and checksum is not None:
body = utils.integrity_iter(body, checksum)
return_request_id = kwargs.get('return_req_id', None)
if return_request_id is not None:
return_request_id.append(resp.headers.get(OS_REQ_ID_HDR, None))
return utils.IterableWithLength(body, content_length)
def _build_params(self, parameters):
params = {'limit': parameters.get('page_size', DEFAULT_PAGE_SIZE)}
if 'marker' in parameters:
params['marker'] = parameters['marker']
sort_key = parameters.get('sort_key')
if sort_key is not None:
if sort_key in SORT_KEY_VALUES:
params['sort_key'] = sort_key
else:
raise ValueError('sort_key must be one of the following: %s.'
% ', '.join(SORT_KEY_VALUES))
sort_dir = parameters.get('sort_dir')
if sort_dir is not None:
if sort_dir in SORT_DIR_VALUES:
params['sort_dir'] = sort_dir
else:
raise ValueError('sort_dir must be one of the following: %s.'
% ', '.join(SORT_DIR_VALUES))
filters = parameters.get('filters', {})
params.update(filters)
return params
def list(self, **kwargs):
"""Get a list of clusters.
:param page_size: number of items to request in each paginated request
:param limit: maximum number of clusters to return
:param marker: begin returning clusters that
appear later in the cluster
list than that represented by this cluster id
:param filters: dict of direct comparison filters that mimics the
structure of an cluster object
:param return_request_id: If an empty list is provided, populate this
list with the request ID value from the header
x-openstack-request-id
:rtype: list of :class:`Cluster`
"""
absolute_limit = kwargs.get('limit')
page_size = kwargs.get('page_size', DEFAULT_PAGE_SIZE)
def paginate(qp, return_request_id=None):
for param, value in six.iteritems(qp):
if isinstance(value, six.string_types):
# Note(flaper87) Url encoding should
# be moved inside http utils, at least
# shouldn't be here.
#
# Making sure all params are str before
# trying to encode them
qp[param] = encodeutils.safe_decode(value)
url = '/v1/clusters?%s' % urlparse.urlencode(qp)
clusters, resp = self._list(url, "clusters")
if return_request_id is not None:
return_request_id.append(resp.headers.get(OS_REQ_ID_HDR, None))
for cluster in clusters:
yield cluster
return_request_id = kwargs.get('return_req_id', None)
params = self._build_params(kwargs)
seen = 0
while True:
seen_last_page = 0
filtered = 0
for cluster in paginate(params, return_request_id):
last_cluster = cluster.id
if (absolute_limit is not None and
seen + seen_last_page >= absolute_limit):
# Note(kragniz): we've seen enough images
return
else:
seen_last_page += 1
yield cluster
seen += seen_last_page
if seen_last_page + filtered == 0:
# Note(kragniz): we didn't get any clusters in the last page
return
if absolute_limit is not None and seen >= absolute_limit:
# Note(kragniz): reached the limit of clusters to return
return
if page_size and seen_last_page + filtered < page_size:
# Note(kragniz): we've reached the last page of the clusters
return
# Note(kragniz): there are more clusters to come
params['marker'] = last_cluster
seen_last_page = 0
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