116 lines
4.3 KiB
Python
116 lines
4.3 KiB
Python
# -*- coding: utf-8 -*- #
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# Copyright 2016 Google LLC. All Rights Reserved.
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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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"""The Migrate command."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import unicode_literals
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from googlecloudsdk.api_lib.app import appengine_api_client
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from googlecloudsdk.api_lib.app import operations_util
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from googlecloudsdk.api_lib.app import service_util
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from googlecloudsdk.calliope import base
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from googlecloudsdk.core import exceptions
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from googlecloudsdk.core import log
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from googlecloudsdk.core.console import console_io
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import six
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import six.moves
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class VersionsMigrateError(exceptions.Error):
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"""Errors when migrating versions."""
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@base.ReleaseTracks(base.ReleaseTrack.BETA, base.ReleaseTrack.GA)
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class Migrate(base.Command):
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"""Migrate traffic from one version to another for a set of services."""
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detailed_help = {
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'EXAMPLES': """\
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This only works for automatically scaled Standard versions.
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To migrate from one version to another for all services where there
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is a version v2 and shut down the previous version, run:
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$ {command} v2
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To migrate from one version to another for a specific service, run:
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$ {command} v2 --service="s1"
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""",
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}
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@staticmethod
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def Args(parser):
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parser.add_argument('version', help='The version to migrate to.')
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parser.add_argument('--service', '-s',
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help='If specified, only migrate versions from the '
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'given service.')
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def Run(self, args):
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client = appengine_api_client.GetApiClientForTrack(self.ReleaseTrack())
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if args.service:
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service = client.GetServiceResource(args.service)
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traffic_split = {}
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if service.split:
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for split in service.split.allocations.additionalProperties:
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traffic_split[split.key] = split.value
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services = [service_util.Service(client.project, service.id,
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traffic_split)]
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else:
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services = client.ListServices()
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all_versions = client.ListVersions(services)
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if args.version not in {v.id for v in all_versions}:
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if args.service:
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raise VersionsMigrateError('Version [{0}/{1}] does not exist.'.format(
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args.service, args.version))
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else:
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raise VersionsMigrateError('Version [{0}] does not exist.'.format(
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args.version))
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service_names = {v.service for v in all_versions if v.id == args.version}
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def WillBeMigrated(v):
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return (v.service in service_names and v.traffic_split and
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v.traffic_split > 0 and v.id != args.version)
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# All versions that will stop receiving traffic.
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versions_to_migrate = list(six.moves.filter(WillBeMigrated, all_versions))
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for version in versions_to_migrate:
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short_name = '{0}/{1}'.format(version.service, version.id)
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promoted_name = '{0}/{1}'.format(version.service, args.version)
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log.status.Print('Migrating all traffic from version '
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'[{0}] to [{1}]'.format(
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short_name, promoted_name))
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console_io.PromptContinue(cancel_on_no=True)
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errors = {}
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for service in sorted(set([v.service for v in versions_to_migrate])):
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allocations = {args.version: 1.0}
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try:
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operations_util.CallAndCollectOpErrors(
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client.SetTrafficSplit, service, allocations, shard_by='ip',
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migrate=True)
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except (operations_util.MiscOperationError) as err:
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errors[service] = six.text_type(err)
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if errors:
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error_string = ('Issues migrating all traffic of '
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'service(s): [{0}]\n\n{1}'.format(
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', '.join(list(errors.keys())),
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'\n\n'.join(list(errors.values()))))
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raise VersionsMigrateError(error_string)
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