1 ##############################################################################
2 # Copyright (c) 2018 Nokia 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 ##############################################################################
9 from flask import Flask
10 from flask import request
14 from threading import Thread
17 from doctor_tests.app_manager.base import BaseAppManager
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
23 class SampleAppManager(BaseAppManager):
25 def __init__(self, stack, conf, log):
26 super(SampleAppManager, self).__init__(conf, log)
31 self.log.info('sample app manager start......')
32 self.app = AppManager(self.stack, self.conf, self, self.log)
36 self.log.info('sample app manager stop......')
40 'Content-Type': 'application/json',
41 'Accept': 'application/json',
43 url = 'http://%s:%d/shutdown'\
44 % (self.conf.app_manager.ip,
45 self.conf.app_manager.port)
46 requests.post(url, data='', headers=headers)
49 class AppManager(Thread):
51 def __init__(self, stack, conf, app_manager, log):
55 self.port = self.conf.app_manager.port
56 self.app_manager = app_manager
58 self.intance_ids = None
60 'Content-Type': 'application/json',
61 'Accept': 'application/json'}
62 self.auth = get_identity_auth(project=self.conf.doctor_project)
63 self.nova = nova_client(self.conf.nova_version,
64 get_session(auth=self.auth))
65 self.orig_number_of_instances = self.number_of_instances()
66 self.ha_instances = self.get_ha_instances()
67 self.floating_ip = None
68 self.active_instance_id = self.active_instance_id()
70 def active_instance_id(self):
71 for instance in self.ha_instances:
72 network_interfaces = next(iter(instance.addresses.values()))
73 for network_interface in network_interfaces:
74 _type = network_interface.get('OS-EXT-IPS:type')
75 if _type == "floating":
76 if not self.floating_ip:
77 self.floating_ip = network_interface.get('addr')
78 self.log.debug('active_instance: %s %s' %
79 (instance.name, instance.id))
81 raise Exception("No active instance found")
83 def switch_over_ha_instance(self):
84 for instance in self.ha_instances:
85 if instance.id != self.active_instance_id:
86 self.log.info('Switch over to: %s %s' % (instance.name,
88 instance.add_floating_ip(self.floating_ip)
89 self.active_instance_id = instance.id
92 def get_instance_ids(self):
94 for instance in self.nova.servers.list(detailed=False):
95 ret.append(instance.id)
98 def get_ha_instances(self):
100 for instance in self.nova.servers.list(detailed=True):
101 if "doctor_ha_app_" in instance.name:
102 ha_instances.append(instance)
103 self.log.debug('ha_instances: %s' % instance.name)
106 def _alarm_data_decoder(self, data):
107 if "[" in data or "{" in data:
108 # string to list or dict removing unicode
109 data = yaml.load(data.replace("u'", "'"))
112 def _alarm_traits_decoder(self, data):
113 return ({str(t[0]): self._alarm_data_decoder(str(t[2]))
114 for t in data['reason_data']['event']['traits']})
116 def get_session_instance_ids(self, url, session_id):
117 ret = requests.get(url, data=None, headers=self.headers)
118 if ret.status_code != 200:
119 raise Exception(ret.text)
120 self.log.info('get_instance_ids %s' % ret.json())
121 return ret.json()['instance_ids']
123 def scale_instances(self, number_of_instances):
124 number_of_instances_before = self.number_of_instances()
126 parameters = self.stack.parameters
127 parameters['nonha_intances'] += number_of_instances
128 self.stack.update(self.stack.stack_name,
131 parameters=parameters,
132 files=self.stack.files)
134 number_of_instances_after = self.number_of_instances()
135 if (number_of_instances_before + number_of_instances !=
136 number_of_instances_after):
137 self.log.error('scale_instances with: %d from: %d ends up to: %d'
138 % (number_of_instances, number_of_instances_before,
139 number_of_instances_after))
140 raise Exception('scale_instances failed')
142 self.log.info('scaled insances from %d to %d' %
143 (number_of_instances_before,
144 number_of_instances_after))
146 def number_of_instances(self):
147 return len(self.nova.servers.list(detailed=False))
150 app = Flask('app_manager')
152 @app.route('/maintenance', methods=['POST'])
153 def maintenance_alarm():
154 data = json.loads(request.data.decode('utf8'))
156 payload = self._alarm_traits_decoder(data)
158 payload = ({t[0]: t[2] for t in
159 data['reason_data']['event']['traits']})
160 self.log.error('cannot parse alarm data: %s' % payload)
161 raise Exception('sample app manager cannot parse alarm.'
162 'Possibly trait data over 256 char')
164 self.log.info('sample app manager received data = %s' % payload)
166 state = payload['state']
170 self.log.info('sample app manager state: %s' % state)
172 if state == 'MAINTENANCE':
173 instance_ids = (self.get_session_instance_ids(
174 payload['instance_ids'],
175 payload['session_id']))
176 reply['instance_ids'] = instance_ids
177 reply_state = 'ACK_MAINTENANCE'
179 elif state == 'SCALE_IN':
180 # scale down 2 isntances that is VCPUS equaling to single
182 self.scale_instances(-2)
183 reply['instance_ids'] = self.get_instance_ids()
184 reply_state = 'ACK_SCALE_IN'
186 elif state == 'MAINTENANCE_COMPLETE':
187 # possibly need to upscale
188 number_of_instances = self.number_of_instances()
189 if self.orig_number_of_instances > number_of_instances:
190 scale_instances = (self.orig_number_of_instances -
192 self.scale_instances(scale_instances)
193 reply_state = 'ACK_MAINTENANCE_COMPLETE'
195 elif state == 'PREPARE_MAINTENANCE':
196 if "MIGRATE" not in payload['allowed_actions']:
197 raise Exception('MIGRATE not supported')
199 instance_ids = (self.get_session_instance_ids(
200 payload['instance_ids'],
201 payload['session_id']))
202 self.log.info('sample app manager got instances: %s' %
204 instance_actions = dict()
205 for instance_id in instance_ids:
206 instance_actions[instance_id] = "MIGRATE"
207 if instance_id == self.active_instance_id:
208 self.switch_over_ha_instance()
209 reply['instance_actions'] = instance_actions
210 reply_state = 'ACK_PREPARE_MAINTENANCE'
212 elif state == 'PLANNED_MAINTENANCE':
213 if "MIGRATE" not in payload['allowed_actions']:
214 raise Exception('MIGRATE not supported')
216 instance_ids = (self.get_session_instance_ids(
217 payload['instance_ids'],
218 payload['session_id']))
219 self.log.info('sample app manager got instances: %s' %
221 instance_actions = dict()
222 for instance_id in instance_ids:
223 instance_actions[instance_id] = "MIGRATE"
224 if instance_id == self.active_instance_id:
225 self.switch_over_ha_instance()
226 reply['instance_actions'] = instance_actions
227 reply_state = 'ACK_PLANNED_MAINTENANCE'
229 elif state == 'INSTANCE_ACTION_DONE':
230 self.log.info('%s' % payload['instance_ids'])
233 raise Exception('sample app manager received event with'
234 ' unknown state %s' % state)
237 reply['session_id'] = payload['session_id']
238 reply['state'] = reply_state
239 url = payload['reply_url']
240 self.log.info('sample app manager reply: %s' % reply)
241 requests.put(url, data=json.dumps(reply), headers=self.headers)
245 @app.route('/shutdown', methods=['POST'])
247 self.log.info('shutdown app manager server at %s' % time.time())
248 func = request.environ.get('werkzeug.server.shutdown')
250 raise RuntimeError('Not running with the Werkzeug Server')
252 return 'app manager shutting down...'
254 app.run(host="0.0.0.0", port=self.port)