52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
# Copyright 2020 Canonical Ltd.
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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 sys
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import logging
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class JujuLogHandler(logging.Handler):
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"""A handler for sending logs to Juju via juju-log."""
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def __init__(self, model_backend, level=logging.DEBUG):
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super().__init__(level)
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self.model_backend = model_backend
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def emit(self, record):
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self.model_backend.juju_log(record.levelname, self.format(record))
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def setup_root_logging(model_backend, debug=False):
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"""Setup python logging to forward messages to juju-log.
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By default, logging is set to DEBUG level, and messages will be filtered by Juju.
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Charmers can also set their own default log level with::
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logging.getLogger().setLevel(logging.INFO)
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model_backend -- a ModelBackend to use for juju-log
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debug -- if True, write logs to stderr as well as to juju-log.
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"""
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logger = logging.getLogger()
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logger.setLevel(logging.DEBUG)
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logger.addHandler(JujuLogHandler(model_backend))
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if debug:
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handler = logging.StreamHandler()
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formatter = logging.Formatter('%(asctime)s %(levelname)-8s %(message)s')
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handler.setFormatter(formatter)
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logger.addHandler(handler)
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sys.excepthook = lambda etype, value, tb: logger.error(
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"Uncaught exception while in charm code:", exc_info=(etype, value, tb))
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