############################################################################## # Copyright (c) 2016 NEC Corporation and others. # # All rights reserved. This program and the accompanying materials # are made available under the terms of the Apache License, Version 2.0 # which accompanies this distribution, and is available at # http://www.apache.org/licenses/LICENSE-2.0 ############################################################################## import argparse import collections from flask import Flask from flask import request import json import logger as doctor_log import os import time import novaclient.client as novaclient import nova_force_down LOG = doctor_log.Logger('doctor_inspector').getLogger() class DoctorInspectorSample(object): nova_api_version = '2.11' def __init__(self): self.servers = collections.defaultdict(list) self.nova = novaclient.Client(self.nova_api_version, os.environ['OS_USERNAME'], os.environ['OS_PASSWORD'], os.environ['OS_TENANT_NAME'], os.environ['OS_AUTH_URL'], connection_pool=True) # check nova is available self.nova.servers.list(detailed=False) self.init_servers_list() def init_servers_list(self): opts = {'all_tenants': True} servers=self.nova.servers.list(search_opts=opts) self.servers.clear() for server in servers: try: host=server.__dict__.get('OS-EXT-SRV-ATTR:host') self.servers[host].append(server) LOG.debug('get hostname=%s from server=%s' % (host, server)) except Exception as e: LOG.error('can not get hostname from server=%s' % server) def disable_compute_host(self, hostname): for server in self.servers[hostname]: self.nova.servers.reset_state(server, 'error') # NOTE: We use our own client here instead of this novaclient for a # workaround. Once keystone provides v2.1 nova api endpoint # in the service catalog which is configured by OpenStack # installer, we can use this: # # self.nova.services.force_down(hostname, 'nova-compute', True) # nova_force_down.force_down(hostname) app = Flask(__name__) inspector = DoctorInspectorSample() @app.route('/events', methods=['POST']) def event_posted(): LOG.info('event posted at %s' % time.time()) LOG.info('inspector = %s' % inspector) LOG.info('received data = %s' % request.data) d = json.loads(request.data) for event in d: hostname = event['details']['hostname'] event_type = event['type'] if event_type == 'compute.host.down': inspector.disable_compute_host(hostname) return "OK" def get_args(): parser = argparse.ArgumentParser(description='Doctor Sample Inspector') parser.add_argument('port', metavar='PORT', type=int, nargs='?', help='a port for inspector') return parser.parse_args() def main(): args = get_args() app.run(port=args.port) if __name__ == '__main__': main()