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")',
  24         'active_instance_in_host':
  25             'active_instance_in_host(vmid, host) :- nova:servers(id=vmid, host_name=host, status="ACTIVE")',
  26         'host_force_down':
  27             'execute[nova:services.force_down(host, "nova-compute", "True")] :- host_down(host)',
  28         'error_vm_states':
  29             'execute[nova:servers.reset_state(vmid, "error")] :- host_down(host), active_instance_in_host(vmid, host)'
  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 self.congress.list_datasources()['results']}
  42
  43         # check nova_api version
  44         nova_api_version = datasources['nova']['config'].get('api_version')
  45         if nova_api_version and nova_api_version < self.nova_api_min_version:
  46             raise Exception('Congress Nova datasource API version < nova_api_min_version(%s)'
  47                             % self.nova_api_min_version)
  48
  49         # create doctor datasource if it's not exist
  50         if self.doctor_datasource not in datasources:
  51             self.congress.create_datasource(
  52                 body={'driver': self.doctor_driver,
  53                       'name': self.doctor_datasource})
  54
  55         # check whether doctor driver exist
  56         drivers = \
  57             {driver['id']: driver for driver in self.congress.list_drivers()['results']}
  58         if self.doctor_driver not in drivers:
  59             raise Exception('Do not support doctor driver in congress')
  60
  61         self.policy_rules = \
  62             {rule['name']: rule for rule in
  63              self.congress.list_policy_rules(self.policy)['results']}
  64
  65     def get_inspector_url(self):
  66         ds = self.congress.list_datasources()['results']
  67         doctor_ds = next((item for item in ds if item['driver'] == 'doctor'),
  68                          None)
  69         congress_endpoint = self.congress.httpclient.get_endpoint(auth=self.auth)
  70         return ('%s/v1/data-sources/%s/tables/events/rows' %
  71                 (congress_endpoint, doctor_ds['id']))
  72
  73     def start(self):
  74         self.log.info('congress inspector start......')
  75
  76         for rule_name, rule in self.rules.items():
  77             self._add_rule(rule_name, rule)
  78
  79     def stop(self):
  80         self.log.info('congress inspector stop......')
  81
  82         for rule_name in self.rules.keys():
  83             self._del_rule(rule_name)
  84
  85     def _add_rule(self, rule_name, rule):
  86         if rule_name not in self.policy_rules:
  87             self.congress.create_policy_rule(self.policy,
  88                                              body={'name': rule_name,
  89                                                    'rule': rule})
  90
  91     def _del_rule(self, rule_name):
  92         if rule_name in self.policy_rules:
  93             rule_id = self.policy_rules[rule_name]['id']
  94             self.congress.delete_policy_rule(self.policy, rule_id)