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# Copyright 2017 Cisco Systems, Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from datetime import datetime
from fluent import sender
import logging
class FluentLogHandler(logging.Handler):
'''This is a minimalist log handler for use with Fluentd
Needs to be attached to a logger using the addHandler method.
It only picks up from every record:
- the formatted message (no timestamp and no level)
- the level name
- the runlogdate (to tie multiple run-related logs together)
The timestamp is retrieved by the fluentd library.
'''
def __init__(self, tag, fluentd_ip='127.0.0.1', fluentd_port=24224):
logging.Handler.__init__(self)
self.tag = tag
self.formatter = logging.Formatter('%(message)s')
self.sender = sender.FluentSender(self.tag, port=fluentd_port)
self.start_new_run()
def start_new_run(self):
'''Delimitate a new run in the stream of records with a new timestamp
'''
self.runlogdate = str(datetime.now())
def emit(self, record):
data = {
"runlogdate": self.runlogdate,
"loglevel": record.levelname,
"message": self.formatter.format(record)
}
self.sender.emit(None, data)
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