115 lines
3.9 KiB
Python
115 lines
3.9 KiB
Python
# Copyright (c) 2015 IBM Corp.
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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 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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import logging
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import sys
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def setup_logging(name, handlers=None, level=None):
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"""Set up logging for a named logger.
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Gets and initializes a named logger, ensuring it at least has a
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`logging.NullHandler` attached.
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:param str name:
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Name of the logger.
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:param list handlers:
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A list of `logging.Handler` objects to attach to the logger.
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:param int level:
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Log level to set the logger at.
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:returns: A `logging.Logger` object that can be used to emit log messages.
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"""
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handlers = handlers or []
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log = logging.getLogger(name)
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if len(log.handlers) == 0 and not handlers:
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h = logging.NullHandler()
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log.addHandler(h)
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for h in handlers:
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log.addHandler(h)
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if level:
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log.setLevel(level)
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return log
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def enable_logging(
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debug=False, http_debug=False, path=None, stream=None,
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format_stream=False,
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format_template='%(asctime)s %(levelname)s: %(name)s %(message)s'):
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"""Enable logging output.
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Helper function to enable logging. This function is available for
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debugging purposes and for folks doing simple applications who want an
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easy 'just make it work for me'. For more complex applications or for
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those who want more flexibility, the standard library ``logging`` package
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will receive these messages in any handlers you create.
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:param bool debug:
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Set this to ``True`` to receive debug messages.
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:param bool http_debug:
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Set this to ``True`` to receive debug messages including
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HTTP requests and responses. This implies ``debug=True``.
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:param str path:
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If a *path* is specified, logging output will written to that file
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in addition to sys.stderr.
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The path is passed to logging.FileHandler, which will append messages
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the file (and create it if needed).
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:param stream:
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One of ``None `` or ``sys.stdout`` or ``sys.stderr``.
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If it is ``None``, nothing is logged to a stream.
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If it isn't ``None``, console output is logged to this stream.
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:param bool format_stream:
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If format_stream is False, the default, apply ``format_template`` to
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``path`` but not to ``stream`` outputs. If True, apply
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``format_template`` to ``stream`` outputs as well.
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:param str format_template:
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Template to pass to :class:`logging.Formatter`.
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:rtype: None
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"""
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if not stream and not path:
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stream = sys.stdout
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if http_debug:
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debug = True
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if debug:
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level = logging.DEBUG
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else:
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level = logging.INFO
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formatter = logging.Formatter(format_template)
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handlers = []
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if stream is not None:
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console = logging.StreamHandler(stream)
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if format_stream:
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console.setFormatter(formatter)
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handlers.append(console)
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if path is not None:
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file_handler = logging.FileHandler(path)
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file_handler.setFormatter(formatter)
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handlers.append(file_handler)
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if http_debug:
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# Enable HTTP level tracing
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setup_logging('keystoneauth', handlers=handlers, level=level)
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setup_logging('openstack', handlers=handlers, level=level)
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# Suppress warning about keystoneauth loggers
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setup_logging('keystoneauth.discovery')
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setup_logging('keystoneauth.identity.base')
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setup_logging('keystoneauth.identity.generic.base')
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