264 lines
10 KiB
Python
264 lines
10 KiB
Python
# Copyright 2018 The Armada Authors.
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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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from oslo_log import log as logging
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import time
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import yaml
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from armada import const
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from armada.exceptions import armada_exceptions
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from armada.handlers.chartbuilder import ChartBuilder
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from armada.handlers.test import test_release_for_success
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from armada.handlers.release_diff import ReleaseDiff
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from armada.handlers.wait import ChartWait
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from armada.exceptions import tiller_exceptions
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import armada.utils.release as r
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LOG = logging.getLogger(__name__)
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class ChartDeploy(object):
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def __init__(self, disable_update_pre, disable_update_post, dry_run,
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k8s_wait_attempts, k8s_wait_attempt_sleep, timeout, tiller):
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self.disable_update_pre = disable_update_pre
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self.disable_update_post = disable_update_post
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self.dry_run = dry_run
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self.k8s_wait_attempts = k8s_wait_attempts
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self.k8s_wait_attempt_sleep = k8s_wait_attempt_sleep
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self.timeout = timeout
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self.tiller = tiller
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def execute(self, chart, cg_test_all_charts, prefix, known_releases):
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namespace = chart.get('namespace')
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release = chart.get('release')
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release_name = r.release_prefixer(prefix, release)
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LOG.info('Processing Chart, release=%s', release_name)
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values = chart.get('values', {})
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pre_actions = {}
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post_actions = {}
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result = {}
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protected = chart.get('protected', {})
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p_continue = protected.get('continue_processing', False)
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old_release = self.find_chart_release(known_releases, release_name)
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status = None
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if old_release:
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status = r.get_release_status(old_release)
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if status not in [const.STATUS_FAILED, const.STATUS_DEPLOYED]:
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raise armada_exceptions.UnexpectedReleaseStatusException(
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release_name, status)
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chart_wait = ChartWait(
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self.tiller.k8s,
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release_name,
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chart,
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namespace,
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k8s_wait_attempts=self.k8s_wait_attempts,
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k8s_wait_attempt_sleep=self.k8s_wait_attempt_sleep,
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timeout=self.timeout)
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native_wait_enabled = chart_wait.is_native_enabled()
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# Begin Chart timeout deadline
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deadline = time.time() + chart_wait.get_timeout()
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chartbuilder = ChartBuilder(chart)
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new_chart = chartbuilder.get_helm_chart()
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# Check for existing FAILED release, and purge
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if status == const.STATUS_FAILED:
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LOG.info('Purging FAILED release %s before deployment.',
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release_name)
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if protected:
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if p_continue:
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LOG.warn(
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'Release %s is `protected`, '
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'continue_processing=True. Operator must '
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'handle FAILED release manually.', release_name)
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result['protected'] = release_name
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return result
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else:
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LOG.error(
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'Release %s is `protected`, '
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'continue_processing=False.', release_name)
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raise armada_exceptions.ProtectedReleaseException(
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release_name)
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else:
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# Purge the release
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self.tiller.uninstall_release(release_name)
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result['purge'] = release_name
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# TODO(mark-burnett): It may be more robust to directly call
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# tiller status to decide whether to install/upgrade rather
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# than checking for list membership.
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if status == const.STATUS_DEPLOYED:
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# indicate to the end user what path we are taking
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LOG.info("Existing release %s found in namespace %s", release_name,
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namespace)
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# extract the installed chart and installed values from the
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# latest release so we can compare to the intended state
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old_chart = old_release.chart
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old_values_string = old_release.config.raw
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upgrade = chart.get('upgrade', {})
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disable_hooks = upgrade.get('no_hooks', False)
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force = upgrade.get('force', False)
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recreate_pods = upgrade.get('recreate_pods', False)
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if upgrade:
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upgrade_pre = upgrade.get('pre', {})
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upgrade_post = upgrade.get('post', {})
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if not self.disable_update_pre and upgrade_pre:
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pre_actions = upgrade_pre
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if not self.disable_update_post and upgrade_post:
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post_actions = upgrade_post
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try:
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old_values = yaml.safe_load(old_values_string)
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except yaml.YAMLError:
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chart_desc = '{} (previously deployed)'.format(
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old_chart.metadata.name)
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raise armada_exceptions.\
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InvalidOverrideValuesYamlException(chart_desc)
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LOG.info('Checking for updates to chart release inputs.')
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diff = self.get_diff(old_chart, old_values, new_chart, values)
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if not diff:
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LOG.info("Found no updates to chart release inputs")
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else:
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LOG.info("Found updates to chart release inputs")
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LOG.debug("%s", diff)
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result['diff'] = {chart['release']: str(diff)}
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# TODO(MarshM): Add tiller dry-run before upgrade and
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# consider deadline impacts
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# do actual update
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timer = int(round(deadline - time.time()))
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LOG.info(
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"Upgrading release %s in namespace %s, wait=%s, "
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"timeout=%ss", release_name, namespace,
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native_wait_enabled, timer)
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tiller_result = self.tiller.update_release(
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new_chart,
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release_name,
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namespace,
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pre_actions=pre_actions,
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post_actions=post_actions,
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disable_hooks=disable_hooks,
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values=yaml.safe_dump(values),
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wait=native_wait_enabled,
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timeout=timer,
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force=force,
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recreate_pods=recreate_pods)
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LOG.info('Upgrade completed with results from Tiller: %s',
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tiller_result.__dict__)
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result['upgrade'] = release_name
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else:
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timer = int(round(deadline - time.time()))
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LOG.info(
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"Installing release %s in namespace %s, wait=%s, "
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"timeout=%ss", release_name, namespace, native_wait_enabled,
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timer)
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tiller_result = self.tiller.install_release(
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new_chart,
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release_name,
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namespace,
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values=yaml.safe_dump(values),
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wait=native_wait_enabled,
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timeout=timer)
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LOG.info('Install completed with results from Tiller: %s',
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tiller_result.__dict__)
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result['install'] = release_name
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# Wait
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timer = int(round(deadline - time.time()))
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chart_wait.wait(timer)
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# Test
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test_chart_override = chart.get('test')
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# Use old default value when not using newer `test` key
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test_cleanup = True
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if test_chart_override is None:
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test_enabled = cg_test_all_charts
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elif isinstance(test_chart_override, bool):
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LOG.warn('Boolean value for chart `test` key is'
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' deprecated and support for this will'
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' be removed. Use `test.enabled` '
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'instead.')
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test_enabled = test_chart_override
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else:
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# NOTE: helm tests are enabled by default
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test_enabled = test_chart_override.get('enabled', True)
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test_cleanup = test_chart_override.get('options', {}).get(
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'cleanup', False)
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just_deployed = ('install' in result) or ('upgrade' in result)
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last_test_passed = old_release and r.get_last_test_result(old_release)
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run_test = test_enabled and (just_deployed or not last_test_passed)
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if run_test:
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timer = int(round(deadline - time.time()))
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self._test_chart(release_name, timer, test_cleanup)
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return result
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def _test_chart(self, release_name, timeout, cleanup):
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if self.dry_run:
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LOG.info(
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'Skipping test during `dry-run`, would have tested '
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'release=%s with timeout %ss.', release_name, timeout)
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return True
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if timeout <= 0:
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reason = ('Timeout expired before testing '
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'release %s' % release_name)
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LOG.error(reason)
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raise armada_exceptions.ArmadaTimeoutException(reason)
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success = test_release_for_success(
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self.tiller, release_name, timeout=timeout, cleanup=cleanup)
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if success:
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LOG.info("Test passed for release: %s", release_name)
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else:
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LOG.info("Test failed for release: %s", release_name)
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raise tiller_exceptions.TestFailedException(release_name)
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def get_diff(self, old_chart, old_values, new_chart, values):
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return ReleaseDiff(old_chart, old_values, new_chart, values).get_diff()
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def find_chart_release(self, known_releases, release_name):
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'''
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Find a release given a list of known_releases and a release name
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'''
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for release in known_releases:
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if release.name == release_name:
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return release
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LOG.info("known: %s, release_name: %s",
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list(map(lambda r: r.name, known_releases)), release_name)
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return None
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