81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
# 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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"""Utilities and helper functions."""
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import os
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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_utils import timeutils
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import six
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from smaug import exception
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from smaug.i18n import _
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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def find_config(config_path):
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"""Find a configuration file using the given hint.
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:param config_path: Full or relative path to the config.
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:returns: Full path of the config, if it exists.
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:raises: `smaug.exception.ConfigNotFound`
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"""
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possible_locations = [
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config_path,
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os.path.join("/var/lib/smaug", "etc", "smaug", config_path),
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os.path.join("/var/lib/smaug", "etc", config_path),
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os.path.join("/var/lib/smaug", config_path),
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"/etc/smaug/%s" % config_path,
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]
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for path in possible_locations:
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if os.path.exists(path):
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return os.path.abspath(path)
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raise exception.ConfigNotFound(path=os.path.abspath(config_path))
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def check_string_length(value, name, min_length=0, max_length=None):
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"""Check the length of specified string.
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:param value: the value of the string
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:param name: the name of the string
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:param min_length: the min_length of the string
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:param max_length: the max_length of the string
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"""
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if not isinstance(value, six.string_types):
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msg = _("%s is not a string or unicode") % name
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raise exception.InvalidInput(message=msg)
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if len(value) < min_length:
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msg = _("%(name)s has a minimum character requirement of "
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"%(min_length)s.") % {'name': name, 'min_length': min_length}
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raise exception.InvalidInput(message=msg)
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if max_length and len(value) > max_length:
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msg = _("%(name)s has more than %(max_length)s "
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"characters.") % {'name': name, 'max_length': max_length}
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raise exception.InvalidInput(message=msg)
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def service_is_up(service):
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"""Check whether a service is up based on last heartbeat."""
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last_heartbeat = service['updated_at'] or service['created_at']
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elapsed = (timeutils.utcnow(with_timezone=False) -
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last_heartbeat).total_seconds()
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return abs(elapsed) <= CONF.service_down_time
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