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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2013 Canonical Ltd
# 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.
"""Render Vendordata as stored in configured file."""
import errno
from oslo.config import cfg
from nova.api.metadata import base
from nova.openstack.common.gettextutils import _
from nova.openstack.common import jsonutils
from nova.openstack.common import log as logging
file_opt = cfg.StrOpt('vendordata_jsonfile_path',
help='File to load json formatted vendor data from')
CONF = cfg.CONF
CONF.register_opt(file_opt)
LOG = logging.getLogger(__name__)
class JsonFileVendorData(base.VendorDataDriver):
def __init__(self, *args, **kwargs):
super(JsonFileVendorData, self).__init__(*args, **kwargs)
data = {}
fpath = CONF.vendordata_jsonfile_path
logprefix = "%s[%s]: " % (file_opt.name, fpath)
if fpath:
try:
with open(fpath, "r") as fp:
data = jsonutils.load(fp)
except IOError as e:
if e.errno == errno.ENOENT:
LOG.warn(logprefix + _("file does not exist"))
else:
LOG.warn(logprefix + _("Unexpected IOError when reading"))
raise e
except ValueError:
LOG.warn(logprefix + _("failed to load json"))
raise
self._data = data
def get(self):
return self._data
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