1 ##############################################################################
2 # Copyright (c) 2016 NEC Corporation and others.
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 ##############################################################################
12 from flask import Flask
13 from flask import request
18 import novaclient.client as novaclient
20 import nova_force_down
23 class DoctorInspectorSample(object):
25 nova_api_version = '2.11'
28 self.servers = collections.defaultdict(list)
29 self.nova = novaclient.Client(self.nova_api_version,
30 os.environ['OS_USERNAME'],
31 os.environ['OS_PASSWORD'],
32 os.environ['OS_TENANT_NAME'],
33 os.environ['OS_AUTH_URL'],
35 # check nova is available
36 self.nova.servers.list(detailed=False)
37 self.init_servers_list()
39 def init_servers_list(self):
40 opts = {'all_tenants': True}
41 servers=self.nova.servers.list(search_opts=opts)
43 for server in servers:
45 host=server.__dict__.get('OS-EXT-SRV-ATTR:host')
46 self.servers[host].append(server)
47 app.logger.debug('get hostname=%s from server=%s' % (host, server))
48 except Exception as e:
49 app.logger.debug('can not get hostname from server=%s' % server)
51 def disable_compute_host(self, hostname):
52 for server in self.servers[hostname]:
53 self.nova.servers.reset_state(server, 'error')
55 # NOTE: We use our own client here instead of this novaclient for a
56 # workaround. Once keystone provides v2.1 nova api endpoint
57 # in the service catalog which is configured by OpenStack
58 # installer, we can use this:
60 # self.nova.services.force_down(hostname, 'nova-compute', True)
62 nova_force_down.force_down(hostname)
67 inspector = DoctorInspectorSample()
70 @app.route('/events', methods=['POST'])
72 app.logger.debug('event posted at %s' % time.time())
73 app.logger.debug('inspector = %s' % inspector)
74 app.logger.debug('received data = %s' % request.data)
75 d = json.loads(request.data)
76 hostname = d['hostname']
77 event_type = d['type']
78 if event_type == 'compute.host.down':
79 inspector.disable_compute_host(hostname)
84 parser = argparse.ArgumentParser(description='Doctor Sample Inspector')
85 parser.add_argument('port', metavar='PORT', type=int, nargs='?',
86 help='a port for inspector')
87 return parser.parse_args()
92 app.run(port=args.port)
94 if __name__ == '__main__':