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export.py

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#!/usr/bin/env python

# Copyright 2016 Google 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.

import argparse

from google.cloud import logging

# [START logging_list_sinks]

def list_sinks():

"""Lists all sinks."""

logging_client = logging.Client()

sinks = list(logging_client.list_sinks())

if not sinks:

print('No sinks.')

for sink in sinks:

print('{}: {} -> {}'.format(sink.name, sink.filter_, sink.destination))

# [END logging_list_sinks]

# [START logging_create_sink]

def create_sink(sink_name, destination_bucket, filter_):

"""Creates a sink to export logs to the given Cloud Storage bucket.

The filter determines which logs this sink matches and will be exported

to the destination. For example a filter of 'severity>=INFO' will send

all logs that have a severity of INFO or greater to the destination.

See https://cloud.google.com/logging/docs/view/advanced_filters for more

filter information.

"""

logging_client = logging.Client()

# The destination can be a Cloud Storage bucket, a Cloud Pub/Sub topic,

# or a BigQuery dataset. In this case, it is a Cloud Storage Bucket.

# See https://cloud.google.com/logging/docs/api/tasks/exporting-logs for

# information on the destination format.

destination = 'storage.googleapis.com/{bucket}'.format(

bucket=destination_bucket)

sink = logging_client.sink(

sink_name,

filter_,

destination)

if sink.exists():

print('Sink {} already exists.'.format(sink.name))

return

sink.create()

print('Created sink {}'.format(sink.name))

# [END logging_create_sink]

# [START logging_update_sink]

def update_sink(sink_name, filter_):

"""Changes a sink's filter.

The filter determines which logs this sink matches and will be exported

to the destination. For example a filter of 'severity>=INFO' will send

all logs that have a severity of INFO or greater to the destination.

See https://cloud.google.com/logging/docs/view/advanced_filters for more

filter information.

"""

logging_client = logging.Client()

sink = logging_client.sink(sink_name)

sink.reload()

sink.filter_ = filter_

print('Updated sink {}'.format(sink.name))

sink.update()

# [END logging_update_sink]

# [START logging_delete_sink]

def delete_sink(sink_name):

"""Deletes a sink."""

logging_client = logging.Client()

sink = logging_client.sink(sink_name)

sink.delete()

print('Deleted sink {}'.format(sink.name))

# [END logging_delete_sink]

if __name__ == '__main__':

parser = argparse.ArgumentParser(

description=__doc__,

formatter_class=argparse.RawDescriptionHelpFormatter

)

subparsers = parser.add_subparsers(dest='command')

subparsers.add_parser('list', help=list_sinks.__doc__)

create_parser = subparsers.add_parser('create', help=list_sinks.__doc__)

create_parser.add_argument(

'sink_name',

help='Name of the log export sink.')

create_parser.add_argument(

'destination_bucket',

help='Cloud Storage bucket where logs will be exported.')

create_parser.add_argument(

'filter',

help='The filter used to match logs.')

update_parser = subparsers.add_parser('update', help=update_sink.__doc__)

update_parser.add_argument(

'sink_name',

help='Name of the log export sink.')

update_parser.add_argument(

'filter',

help='The filter used to match logs.')

delete_parser = subparsers.add_parser('delete', help=delete_sink.__doc__)

delete_parser.add_argument(

'sink_name',

help='Name of the log export sink.')

args = parser.parse_args()

if args.command == 'list':

list_sinks()

elif args.command == 'create':

create_sink(args.sink_name, args.destination_bucket, args.filter)

elif args.command == 'update':

update_sink(args.sink_name, args.filter)

elif args.command == 'delete':

delete_sink(args.sink_name)