62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
# Copyright 2013 Canonical Ltd
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Render Vendordata as stored in configured file."""
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import errno
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_serialization import jsonutils
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from nova.api.metadata import base
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from nova.i18n import _LW
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file_opt = cfg.StrOpt('vendordata_jsonfile_path',
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help='File to load JSON formatted vendor data from')
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CONF = cfg.CONF
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CONF.register_opt(file_opt)
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LOG = logging.getLogger(__name__)
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class JsonFileVendorData(base.VendorDataDriver):
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def __init__(self, *args, **kwargs):
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super(JsonFileVendorData, self).__init__(*args, **kwargs)
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data = {}
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fpath = CONF.vendordata_jsonfile_path
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logprefix = "%s[%s]: " % (file_opt.name, fpath)
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if fpath:
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try:
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with open(fpath, "r") as fp:
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data = jsonutils.load(fp)
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except IOError as e:
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if e.errno == errno.ENOENT:
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LOG.warning(_LW("%(logprefix)sfile does not exist"),
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{'logprefix': logprefix})
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else:
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LOG.warning(_LW("%(logprefix)unexpected IOError when "
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"reading"), {'logprefix': logprefix})
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raise e
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except ValueError:
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LOG.warning(_LW("%(logprefix)sfailed to load json"),
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{'logprefix': logprefix})
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raise
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self._data = data
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def get(self):
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return self._data
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