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* An automated rollback tool for Nomulus A tool that directs traffic between deployed versions. It handles the conversion between Nomulus tags and AppEngine versions, executes schema compatibility tests, ensures that steps are executed in the correct order, and updates deployment records appropriately.
129 lines
5.2 KiB
Python
129 lines
5.2 KiB
Python
# Copyright 2020 The Nomulus Authors. 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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"""End-to-end test of rollback."""
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import textwrap
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from typing import Any, Dict
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import unittest
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from unittest import mock
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import appengine_test
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import gcs_test
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import plan
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def _make_serving_version(service: str, version: str) -> Dict[str, Any]:
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"""Creates description of one serving version in API response."""
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return {
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'split': {
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'allocations': {
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version: 1,
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}
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},
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'id': service
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}
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def _make_version_config(version,
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scaling: str,
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instance_tag: str,
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instances: int = 10) -> Dict[str, Any]:
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"""Creates one version config as part of an API response."""
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return {scaling: {instance_tag: instances}, 'id': version}
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class RollbackTestCase(unittest.TestCase):
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"""End-to-end test of rollback."""
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def setUp(self) -> None:
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self._appengine_admin, self._appengine_request = (
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appengine_test.setup_appengine_admin())
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self._gcs_client, self._schema_tag, self._version_map = (
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gcs_test.setup_gcs_client('crash'))
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self.addCleanup(mock.patch.stopall)
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def test_rollback_success(self):
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self._schema_tag.download_as_text.return_value = (
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'nomulus-2010-1014-RC00')
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self._version_map.download_as_text.return_value = textwrap.dedent("""\
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nomulus-20201014-RC00,backend,nomulus-backend-v009
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nomulus-20201014-RC00,default,nomulus-default-v009
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nomulus-20201014-RC00,pubapi,nomulus-pubapi-v009
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nomulus-20201014-RC00,tools,nomulus-tools-v009
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nomulus-20201014-RC01,backend,nomulus-backend-v011
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nomulus-20201014-RC01,default,nomulus-default-v010
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nomulus-20201014-RC01,pubapi,nomulus-pubapi-v010
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nomulus-20201014-RC01,tools,nomulus-tools-v010
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""")
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self._appengine_request.execute.side_effect = [
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# Response to get_serving_versions:
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{
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'services': [
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_make_serving_version('backend', 'nomulus-backend-v011'),
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_make_serving_version('default', 'nomulus-default-v010'),
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_make_serving_version('pubapi', 'nomulus-pubapi-v010'),
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_make_serving_version('tools', 'nomulus-tools-v010')
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]
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},
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# Responses to get_version_configs. AppEngineAdmin queries the
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# services by alphabetical order to facilitate this test.
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{
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'versions': [
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_make_version_config('nomulus-backend-v009',
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'basicScaling', 'maxInstances'),
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_make_version_config('nomulus-backend-v011',
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'basicScaling', 'maxInstances')
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]
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},
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{
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'versions': [
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_make_version_config('nomulus-default-v009',
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'basicScaling', 'maxInstances'),
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_make_version_config('nomulus-default-v010',
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'basicScaling', 'maxInstances')
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]
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},
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{
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'versions': [
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_make_version_config('nomulus-pubapi-v009',
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'manualScaling', 'instances'),
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_make_version_config('nomulus-pubapi-v010',
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'manualScaling', 'instances')
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]
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},
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{
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'versions': [
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_make_version_config('nomulus-tools-v009',
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'automaticScaling',
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'maxTotalInstances'),
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_make_version_config('nomulus-tools-v010',
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'automaticScaling',
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'maxTotalInstances')
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]
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}
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]
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steps = plan.get_rollback_plan(self._gcs_client, self._appengine_admin,
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'crash', 'nomulus-20201014-RC00')
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self.assertEqual(len(steps), 14)
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self.assertRegex(steps[0].info(),
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'.*nom_build :integration:sqlIntegrationTest.*')
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self.assertRegex(steps[1].info(), '.*gcloud app versions start.*')
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self.assertRegex(steps[5].info(),
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'.*gcloud app services set-traffic.*')
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self.assertRegex(steps[9].info(), '.*gcloud app versions stop.*')
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self.assertRegex(steps[13].info(),
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'.*echo nomulus-20201014-RC00 | gsutil cat -.*')
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if __name__ == '__main__':
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unittest.main()
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