0c348313a4
As the openstack/common is deprecated, Watcher should use oslo lib directly to run in the openstack env. So there is much work to do with oslo. This patch fixed the log part. Change-Id: I3145a842fe3a22b3d08fec60d180329073edd50f
100 lines
2.7 KiB
Python
100 lines
2.7 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2015 b<>com
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Utilities and helper functions."""
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from oslo_config import cfg
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from oslo_log import log as logging
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import re
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import six
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import uuid
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from watcher.common.i18n import _LW
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UTILS_OPTS = [
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cfg.StrOpt('rootwrap_config',
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default="/etc/watcher/rootwrap.conf",
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help='Path to the rootwrap configuration file to use for '
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'running commands as root.'),
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cfg.StrOpt('tempdir',
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help='Explicitly specify the temporary working directory.'),
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]
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CONF = cfg.CONF
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CONF.register_opts(UTILS_OPTS)
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LOG = logging.getLogger(__name__)
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def safe_rstrip(value, chars=None):
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"""Removes trailing characters from a string if that does not make it empty
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:param value: A string value that will be stripped.
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:param chars: Characters to remove.
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:return: Stripped value.
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"""
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if not isinstance(value, six.string_types):
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LOG.warn(_LW("Failed to remove trailing character. Returning original "
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"object. Supplied object is not a string: %s,"), value)
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return value
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return value.rstrip(chars) or value
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def generate_uuid():
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return str(uuid.uuid4())
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def is_int_like(val):
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"""Check if a value looks like an int."""
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try:
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return str(int(val)) == str(val)
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except Exception:
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return False
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def is_uuid_like(val):
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"""Returns validation of a value as a UUID.
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For our purposes, a UUID is a canonical form string:
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aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa
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"""
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try:
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return str(uuid.UUID(val)) == val
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except (TypeError, ValueError, AttributeError):
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return False
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def is_hostname_safe(hostname):
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"""Determine if the supplied hostname is RFC compliant.
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Check that the supplied hostname conforms to:
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* http://en.wikipedia.org/wiki/Hostname
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* http://tools.ietf.org/html/rfc952
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* http://tools.ietf.org/html/rfc1123
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:param hostname: The hostname to be validated.
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:returns: True if valid. False if not.
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"""
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m = '^[a-z0-9]([a-z0-9\-]{0,61}[a-z0-9])?$'
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return (isinstance(hostname, six.string_types) and
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(re.match(m, hostname) is not None))
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