150 lines
5.5 KiB
Python
150 lines
5.5 KiB
Python
# Copyright (c) 2016 Mirantis Inc.
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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
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# 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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import collections
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import functools
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from oslo_log import log as logging
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import six
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from sahara.i18n import _
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from sahara.plugins.ambari import client
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from sahara.plugins.ambari import common as p_common
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from sahara.plugins import utils as plugin_utils
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from sahara.service.health import health_check_base
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LOG = logging.getLogger(__name__)
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class AlertsProvider(object):
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def __init__(self, cluster):
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self._data = None
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self._cluster_services = None
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self._exception_store = None
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self.cluster = cluster
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# calling to cache all data
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self.get_alerts_data()
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def get_cluster_services(self):
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return self._cluster_services
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def is_ambari_active(self):
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if self._exception_store:
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raise health_check_base.RedHealthError(self._exception_store)
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return _("Ambari Monitor is healthy")
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def get_alerts_data(self, service=None):
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if self._data is not None:
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# return cached data
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return self._data.get(service, []) if service else self._data
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self._data = {}
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self._cluster_services = []
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try:
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ambari = plugin_utils.get_instance(
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self.cluster, p_common.AMBARI_SERVER)
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password = self.cluster.extra.get("ambari_password")
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with client.AmbariClient(ambari, password=password) as ambari:
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resp = ambari.get_alerts_data(self.cluster)
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for alert in resp:
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alert = alert.get('Alert', {})
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service = alert.get('service_name').lower()
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if service not in self._data:
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self._data[service] = []
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self._cluster_services.append(service)
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self._data[service].append(alert)
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except Exception as e:
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prefix = _("Can't get response from Ambari Monitor")
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msg = _("%(problem)s: %(description)s") % {
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'problem': prefix, 'description': six.text_type(e)}
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# don't put in exception to logs, it will be done by log.exception
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LOG.exception(prefix)
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self._exception_store = msg
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class AmbariHealthCheck(health_check_base.BasicHealthCheck):
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def __init__(self, cluster, provider):
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self.provider = provider
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super(AmbariHealthCheck, self).__init__(cluster)
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def get_health_check_name(self):
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return "Ambari alerts health check"
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def is_available(self):
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return self.cluster.plugin_name == 'ambari'
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def check_health(self):
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return self.provider.is_ambari_active()
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class AmbariServiceHealthCheck(health_check_base.BasicHealthCheck):
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def __init__(self, cluster, provider, service):
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self.provider = provider
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self.service = service.lower()
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super(AmbariServiceHealthCheck, self).__init__(cluster)
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def get_health_check_name(self):
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return "Ambari alerts for %s Service" % self.service
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def is_available(self):
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return self.cluster.plugin_name == 'ambari'
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def get_important_services(self):
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return [
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p_common.HDFS_SERVICE.lower(),
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p_common.YARN_SERVICE.lower(),
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p_common.OOZIE_SERVICE.lower(),
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p_common.ZOOKEEPER_SERVICE.lower()
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]
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def check_health(self):
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imp_map = {'OK': 'GREEN', 'WARNING': 'YELLOW', 'CRITICAL': 'RED'}
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other_map = {'OK': 'GREEN'}
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color_counter = collections.Counter()
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important_services = self.get_important_services()
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for alert in self.provider.get_alerts_data(self.service):
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alert_summary = alert.get('state', 'UNKNOWN')
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if self.service in important_services:
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target = imp_map.get(alert_summary, 'RED')
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else:
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target = other_map.get(alert_summary, 'YELLOW')
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color_counter[target] += 1
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if color_counter['RED'] > 0 and color_counter['YELLOW'] > 0:
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raise health_check_base.RedHealthError(
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_("Ambari Monitor has responded that cluster has "
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"%(red)d critical and %(yellow)d warning alert(s)")
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% {'red': color_counter['RED'],
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'yellow': color_counter['YELLOW']})
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elif color_counter['RED'] > 0:
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raise health_check_base.RedHealthError(
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_("Ambari Monitor has responded that cluster has "
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"%(red)d critical alert(s)")
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% {'red': color_counter['RED']})
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elif color_counter['YELLOW'] > 0:
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raise health_check_base.YellowHealthError(
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_("Ambari Monitor has responded that cluster "
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"has %d warning alert(s)")
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% color_counter['YELLOW'])
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return _("No alerts found")
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def get_health_checks(cluster):
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provider = AlertsProvider(cluster)
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checks = [functools.partial(AmbariHealthCheck, provider=provider)]
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for service in provider.get_cluster_services():
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checks.append(functools.partial(
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AmbariServiceHealthCheck, provider=provider, service=service))
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return checks
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