doctor_tests/inspector/sample.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 import collections
  10 from flask import Flask
  11 from flask import request
  12 import json
  13 import time
  14 from threading import Thread
  15 import requests
  16
  17 from doctor_tests.common import utils
  18 from doctor_tests.identity_auth import get_identity_auth
  19 from doctor_tests.identity_auth import get_session
  20 from doctor_tests.os_clients import nova_client
  21 from doctor_tests.os_clients import neutron_client
  22 from doctor_tests.inspector.base import BaseInspector
  23
  24
  25 class SampleInspector(BaseInspector):
  26     event_type = 'compute.host.down'
  27
  28     def __init__(self, conf, log):
  29         super(SampleInspector, self).__init__(conf, log)
  30         self.inspector_url = self.get_inspector_url()
  31         self.novaclients = list()
  32         self._init_novaclients()
  33         # Normally we use this client for non redundant API calls
  34         self.nova = self.novaclients[0]
  35
  36         auth = get_identity_auth(project=self.conf.doctor_project)
  37         session = get_session(auth=auth)
  38         if self.conf.inspector.update_neutron_port_dp_status:
  39             self.neutron = neutron_client(session)
  40
  41         self.servers = collections.defaultdict(list)
  42         self.hostnames = list()
  43         self.app = None
  44
  45     def _init_novaclients(self):
  46         self.NUMBER_OF_CLIENTS = self.conf.instance_count
  47         auth = get_identity_auth(project=self.conf.doctor_project)
  48         session = get_session(auth=auth)
  49         for i in range(self.NUMBER_OF_CLIENTS):
  50             self.novaclients.append(
  51                 nova_client(self.conf.nova_version, session))
  52
  53     def _init_servers_list(self):
  54         self.servers.clear()
  55         opts = {'all_tenants': True}
  56         servers = self.nova.servers.list(search_opts=opts)
  57         for server in servers:
  58             try:
  59                 host = server.__dict__.get('OS-EXT-SRV-ATTR:host')
  60                 self.servers[host].append(server)
  61                 self.log.debug('get hostname=%s from server=%s'
  62                                % (host, server))
  63             except Exception as e:
  64                 self.log.info('can not get hostname from server=%s, error=%s'
  65                               % (server, e))
  66
  67     def get_inspector_url(self):
  68         return 'http://%s:%s/events' % (self.conf.inspector.ip,
  69                                         self.conf.inspector.port)
  70
  71     def start(self):
  72         self.log.info('sample inspector start......')
  73         self._init_servers_list()
  74         self.app = InspectorApp(self.conf.inspector.port, self, self.log)
  75         self.app.start()
  76
  77     def stop(self):
  78         self.log.info('sample inspector stop......')
  79         if not self.app:
  80             return
  81         for hostname in self.hostnames:
  82             self.nova.services.force_down(hostname, 'nova-compute', False)
  83
  84         headers = {
  85             'Content-Type': 'application/json',
  86             'Accept': 'application/json',
  87         }
  88         url = '%s%s' % (self.inspector_url, 'shutdown') \
  89             if self.inspector_url.endswith('/') else \
  90             '%s%s' % (self.inspector_url, '/shutdown')
  91         requests.post(url, data='', headers=headers)
  92
  93     def handle_events(self, events):
  94         for event in events:
  95             hostname = event['details']['hostname']
  96             event_type = event['type']
  97             if event_type == self.event_type:
  98                 self.hostnames.append(hostname)
  99                 thr1 = self._disable_compute_host(hostname)
 100                 thr2 = self._vms_reset_state('error', hostname)
 101                 if self.conf.inspector.update_neutron_port_dp_status:
 102                     thr3 = self._set_ports_data_plane_status('DOWN', hostname)
 103                 thr1.join()
 104                 thr2.join()
 105                 if self.conf.inspector.update_neutron_port_dp_status:
 106                     thr3.join()
 107
 108     @utils.run_async
 109     def _disable_compute_host(self, hostname):
 110         self.nova.services.force_down(hostname, 'nova-compute', True)
 111         self.log.info('doctor mark host(%s) down at %s'
 112                       % (hostname, time.time()))
 113
 114     @utils.run_async
 115     def _vms_reset_state(self, state, hostname):
 116
 117         @utils.run_async
 118         def _vm_reset_state(nova, server, state):
 119             nova.servers.reset_state(server, state)
 120             self.log.info('doctor mark vm(%s) error at %s'
 121                           % (server, time.time()))
 122
 123         thrs = []
 124         for nova, server in zip(self.novaclients, self.servers[hostname]):
 125             t = _vm_reset_state(nova, server, state)
 126             thrs.append(t)
 127         for t in thrs:
 128             t.join()
 129
 130     @utils.run_async
 131     def _set_ports_data_plane_status(self, status, hostname):
 132         body = {'data_plane_status': status}
 133
 134         @utils.run_async
 135         def _set_port_data_plane_status(port_id):
 136             self.neutron.update_port(port_id, body)
 137             self.log.info('doctor set data plane status %s on port %s'
 138                           % (status, port_id))
 139
 140         thrs = []
 141         params = {'binding:host_id': hostname}
 142         for port_id in self.neutron.list_ports(**params):
 143             t = _set_port_data_plane_status(port_id)
 144             thrs.append(t)
 145         for t in thrs:
 146             t.join()
 147
 148
 149 class InspectorApp(Thread):
 150
 151     def __init__(self, port, inspector, log):
 152         Thread.__init__(self)
 153         self.port = port
 154         self.inspector = inspector
 155         self.log = log
 156
 157     def run(self):
 158         app = Flask('inspector')
 159
 160         @app.route('/events', methods=['PUT'])
 161         def event_posted():
 162             self.log.info('event posted in sample inspector at %s'
 163                           % time.time())
 164             self.log.info('sample inspector = %s' % self.inspector)
 165             self.log.info('sample inspector received data = %s'
 166                           % request.data)
 167             events = json.loads(request.data.decode('utf8'))
 168             self.inspector.handle_events(events)
 169             return "OK"
 170
 171         @app.route('/shutdown', methods=['POST'])
 172         def shutdown():
 173             self.log.info('shutdown inspector app server at %s' % time.time())
 174             func = request.environ.get('werkzeug.server.shutdown')
 175             if func is None:
 176                 raise RuntimeError('Not running with the Werkzeug Server')
 177             func()
 178             return 'inspector app shutting down...'
 179
 180         app.run(host="0.0.0.0", port=self.port)