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
15 import logger as doctor_log
20 from keystoneauth1 import session
21 import novaclient.client as novaclient
25 LOG = doctor_log.Logger('doctor_inspector').getLogger()
28 class ThreadedResetState(threading.Thread):
30 def __init__(self, nova, state, server):
31 threading.Thread.__init__(self)
37 self.nova.servers.reset_state(self.server, self.state)
38 LOG.info('doctor mark vm(%s) error at %s' % (self.server, time.time()))
41 class DoctorInspectorSample(object):
43 NOVA_API_VERSION = '2.34'
44 NUMBER_OF_CLIENTS = 50
45 # TODO(tojuvone): This could be enhanced in future with dynamic
46 # reuse of self.novaclients when all threads in use and
47 # self.NUMBER_OF_CLIENTS based on amount of cores or overriden by input
51 self.servers = collections.defaultdict(list)
52 self.novaclients = list()
53 auth=identity_auth.get_identity_auth()
54 sess=session.Session(auth=auth)
55 # Pool of novaclients for redundant usage
56 for i in range(self.NUMBER_OF_CLIENTS):
57 self.novaclients.append(
58 novaclient.Client(self.NOVA_API_VERSION, session=sess,
59 connection_pool=True))
60 # Normally we use this client for non redundant API calls
61 self.nova=self.novaclients[0]
62 self.nova.servers.list(detailed=False)
63 self.init_servers_list()
65 def init_servers_list(self):
66 opts = {'all_tenants': True}
67 servers=self.nova.servers.list(search_opts=opts)
69 for server in servers:
71 host=server.__dict__.get('OS-EXT-SRV-ATTR:host')
72 self.servers[host].append(server)
73 LOG.debug('get hostname=%s from server=%s' % (host, server))
74 except Exception as e:
75 LOG.error('can not get hostname from server=%s' % server)
77 def disable_compute_host(self, hostname):
79 if len(self.servers[hostname]) > self.NUMBER_OF_CLIENTS:
80 # TODO(tojuvone): This could be enhanced in future with dynamic
81 # reuse of self.novaclients when all threads in use
82 LOG.error('%d servers in %s. Can handle only %d'%(
83 self.servers[hostname], hostname, self.NUMBER_OF_CLIENTS))
84 for nova, server in zip(self.novaclients, self.servers[hostname]):
85 t = ThreadedResetState(nova, "error", server)
90 self.nova.services.force_down(hostname, 'nova-compute', True)
91 LOG.info('doctor mark host(%s) down at %s' % (hostname, time.time()))
95 inspector = DoctorInspectorSample()
98 @app.route('/events', methods=['POST'])
100 LOG.info('event posted at %s' % time.time())
101 LOG.info('inspector = %s' % inspector)
102 LOG.info('received data = %s' % request.data)
103 d = json.loads(request.data)
105 hostname = event['details']['hostname']
106 event_type = event['type']
107 if event_type == 'compute.host.down':
108 inspector.disable_compute_host(hostname)
113 parser = argparse.ArgumentParser(description='Doctor Sample Inspector')
114 parser.add_argument('port', metavar='PORT', type=int, nargs='?',
115 help='a port for inspector')
116 return parser.parse_args()
121 app.run(port=args.port)
124 if __name__ == '__main__':