doctor_tests/inspector/congress.py

   1 ##############################################################################
   2 # Copyright (c) 2017 ZTE Corporation and others.
   3 #
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9 from doctor_tests.identity_auth import get_identity_auth
  10 from doctor_tests.identity_auth import get_session
  11 from doctor_tests.os_clients import congress_client
  12
  13 from doctor_tests.inspector.base import BaseInspector
  14
  15
  16 class CongressInspector(BaseInspector):
  17     nova_api_min_version = '2.11'
  18     doctor_driver = 'doctor'
  19     doctor_datasource = 'doctor'
  20     policy = 'classification'
  21     rules = {
  22         'host_down':
  23             'host_down(host) :- doctor:events(hostname=host, type="compute.host.down", status="down")',       # noqa
  24         'active_instance_in_host':
  25             'active_instance_in_host(vmid, host) :- nova:servers(id=vmid, host_name=host, status="ACTIVE")',  # noqa
  26         'host_force_down':
  27             'execute[nova:services.force_down(host, "nova-compute", "True")] :- host_down(host)',             # noqa
  28         'error_vm_states':
  29             'execute[nova:servers.reset_state(vmid, "error")] :- host_down(host), active_instance_in_host(vmid, host)'    # noqa
  30     }
  31
  32     def __init__(self, conf, log):
  33         super(CongressInspector, self).__init__(conf, log)
  34         self.auth = get_identity_auth()
  35         self.congress = congress_client(get_session(auth=self.auth))
  36         self._init_driver_and_ds()
  37         self.inspector_url = self.get_inspector_url()
  38
  39     def _init_driver_and_ds(self):
  40         datasources = \
  41             {ds['name']: ds for ds in
  42              self.congress.list_datasources()['results']}
  43
  44         # check nova_api version
  45         nova_api_version = datasources['nova']['config'].get('api_version')
  46         if nova_api_version and nova_api_version < self.nova_api_min_version:
  47             raise Exception('Congress Nova datasource API '
  48                             'version < nova_api_min_version(%s)'
  49                             % self.nova_api_min_version)
  50
  51         # create doctor datasource if it's not exist
  52         if self.doctor_datasource not in datasources:
  53             self.congress.create_datasource(
  54                 body={'driver': self.doctor_driver,
  55                       'name': self.doctor_datasource})
  56
  57         # check whether doctor driver exist
  58         drivers = \
  59             {driver['id']: driver for driver in
  60              self.congress.list_drivers()['results']}
  61         if self.doctor_driver not in drivers:
  62             raise Exception('Do not support doctor driver in congress')
  63
  64         self.policy_rules = \
  65             {rule['name']: rule for rule in
  66              self.congress.list_policy_rules(self.policy)['results']}
  67
  68     def get_inspector_url(self):
  69         ds = self.congress.list_datasources()['results']
  70         doctor_ds = next((item for item in ds if item['driver'] == 'doctor'),
  71                          None)
  72         congress_endpoint = \
  73             self.congress.httpclient.get_endpoint(auth=self.auth)
  74         return ('%s/v1/data-sources/%s/tables/events/rows' %
  75                 (congress_endpoint, doctor_ds['id']))
  76
  77     def start(self):
  78         self.log.info('congress inspector start......')
  79
  80         for rule_name, rule in self.rules.items():
  81             self._add_rule(rule_name, rule)
  82
  83     def stop(self):
  84         self.log.info('congress inspector stop......')
  85
  86         for rule_name in self.rules.keys():
  87             self._del_rule(rule_name)
  88
  89     def _add_rule(self, rule_name, rule):
  90         if rule_name not in self.policy_rules:
  91             self.congress.create_policy_rule(self.policy,
  92                                              body={'name': rule_name,
  93                                                    'rule': rule})
  94
  95     def _del_rule(self, rule_name):
  96         if rule_name in self.policy_rules:
  97             rule_id = self.policy_rules[rule_name]['id']
  98             self.congress.delete_policy_rule(self.policy, rule_id)