summaryrefslogtreecommitdiffstats
path: root/doctor_tests/app_manager/sample.py
blob: 94049aa212f8db92181e57acc0bb319a59bee136 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
##############################################################################
# Copyright (c) 2018 Nokia 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
##############################################################################
from flask import Flask
from flask import request
import json
import yaml
import time
from threading import Thread
import requests

from doctor_tests.app_manager.base import BaseAppManager
from doctor_tests.identity_auth import get_identity_auth
from doctor_tests.identity_auth import get_session
from doctor_tests.os_clients import neutron_client
from doctor_tests.os_clients import nova_client


class SampleAppManager(BaseAppManager):

    def __init__(self, stack, conf, log):
        super(SampleAppManager, self).__init__(conf, log)
        self.stack = stack
        self.app = None

    def start(self):
        self.log.info('sample app manager start......')
        self.app = AppManager(self.stack, self.conf, self, self.log)
        self.app.start()

    def stop(self):
        self.log.info('sample app manager stop......')
        if not self.app:
            return
        headers = {
            'Content-Type': 'application/json',
            'Accept': 'application/json',
        }
        url = 'http://%s:%d/shutdown'\
              % (self.conf.app_manager.ip,
                 self.conf.app_manager.port)
        requests.post(url, data='', headers=headers)


class AppManager(Thread):

    def __init__(self, stack, conf, app_manager, log):
        Thread.__init__(self)
        self.stack = stack
        self.conf = conf
        self.port = self.conf.app_manager.port
        self.app_manager = app_manager
        self.log = log
        self.intance_ids = None
        self.auth = get_identity_auth(project=self.conf.doctor_project)
        self.session = get_session(auth=self.auth)
        self.nova = nova_client(self.conf.nova_version,
                                self.session)
        self.neutron = neutron_client(session=self.session)
        self.headers = {
            'Content-Type': 'application/json',
            'Accept': 'application/json'}
        if self.conf.admin_tool.type == 'fenix':
            self.headers['X-Auth-Token'] = self.session.get_token()
        self.orig_number_of_instances = self.number_of_instances()
        self.ha_instances = self.get_ha_instances()
        self.floating_ip = None
        self.active_instance_id = self.active_instance_id()

    def active_instance_id(self):
        for instance in self.ha_instances:
            network_interfaces = next(iter(instance.addresses.values()))
            for network_interface in network_interfaces:
                _type = network_interface.get('OS-EXT-IPS:type')
                if _type == "floating":
                    if not self.floating_ip:
                        self.floating_ip = network_interface.get('addr')
                    self.log.debug('active_instance: %s %s' %
                                   (instance.name, instance.id))
                    return instance.id
        raise Exception("No active instance found")

    def switch_over_ha_instance(self):
        for instance in self.ha_instances:
            if instance.id != self.active_instance_id:
                self.log.info('Switch over to: %s %s' % (instance.name,
                                                         instance.id))
                # Deprecated, need to use neutron instead
                # instance.add_floating_ip(self.floating_ip)
                port = self.neutron.list_ports(device_id=instance.id)['ports'][0]['id']  # noqa
                floating_id = self.neutron.list_floatingips(floating_ip_address=self.floating_ip)['floatingips'][0]['id']  # noqa
                self.neutron.update_floatingip(floating_id, {'floatingip': {'port_id': port}})  # noqa
                # Have to update ha_instances as floating_ip changed
                self.ha_instances = self.get_ha_instances()
                self.active_instance_id = instance.id
                break

    def get_instance_ids(self):
        ret = list()
        for instance in self.nova.servers.list(detailed=False):
            ret.append(instance.id)
        return ret

    def get_ha_instances(self):
        ha_instances = list()
        for instance in self.nova.servers.list(detailed=True):
            if "doctor_ha_app_" in instance.name:
                ha_instances.append(instance)
                self.log.debug('ha_instances: %s' % instance.name)
        return ha_instances

    def _alarm_data_decoder(self, data):
        if "[" in data or "{" in data:
            # string to list or dict removing unicode
            data = yaml.load(data.replace("u'", "'"))
        return data

    def _alarm_traits_decoder(self, data):
        return ({str(t[0]): self._alarm_data_decoder(str(t[2]))
                for t in data['reason_data']['event']['traits']})

    def get_session_instance_ids(self, url, session_id):
        ret = requests.get(url, data=None, headers=self.headers)
        if ret.status_code != 200:
            raise Exception(ret.text)
        self.log.info('get_instance_ids %s' % ret.json())
        return ret.json()['instance_ids']

    def scale_instances(self, number_of_instances):
        number_of_instances_before = self.number_of_instances()

        parameters = self.stack.parameters
        parameters['nonha_intances'] += number_of_instances
        self.stack.update(self.stack.stack_name,
                          self.stack.stack_id,
                          self.stack.template,
                          parameters=parameters,
                          files=self.stack.files)

        number_of_instances_after = self.number_of_instances()
        if (number_of_instances_before + number_of_instances !=
           number_of_instances_after):
            self.log.error('scale_instances with: %d from: %d ends up to: %d'
                           % (number_of_instances, number_of_instances_before,
                              number_of_instances_after))
            raise Exception('scale_instances failed')

        self.log.info('scaled insances from %d to %d' %
                      (number_of_instances_before,
                       number_of_instances_after))

    def number_of_instances(self):
        return len(self.nova.servers.list(detailed=False))

    def run(self):
        app = Flask('app_manager')

        @app.route('/maintenance', methods=['POST'])
        def maintenance_alarm():
            data = json.loads(request.data.decode('utf8'))
            try:
                payload = self._alarm_traits_decoder(data)
            except:
                payload = ({t[0]: t[2] for t in
                           data['reason_data']['event']['traits']})
                self.log.error('cannot parse alarm data: %s' % payload)
                raise Exception('sample app manager cannot parse alarm.'
                                'Possibly trait data over 256 char')

            self.log.info('sample app manager received data = %s' % payload)

            state = payload['state']
            reply_state = None
            reply = dict()

            self.log.info('sample app manager state: %s' % state)

            if state == 'MAINTENANCE':
                instance_ids = (self.get_session_instance_ids(
                                payload['instance_ids'],
                                payload['session_id']))
                reply['instance_ids'] = instance_ids
                reply_state = 'ACK_MAINTENANCE'

            elif state == 'SCALE_IN':
                # scale down 2 isntances that is VCPUS equaling to single
                # compute node
                self.scale_instances(-2)
                reply['instance_ids'] = self.get_instance_ids()
                reply_state = 'ACK_SCALE_IN'

            elif state == 'MAINTENANCE_COMPLETE':
                # possibly need to upscale
                number_of_instances = self.number_of_instances()
                if self.orig_number_of_instances > number_of_instances:
                    scale_instances = (self.orig_number_of_instances -
                                       number_of_instances)
                    self.scale_instances(scale_instances)
                reply_state = 'ACK_MAINTENANCE_COMPLETE'

            elif state == 'PREPARE_MAINTENANCE':
                if "MIGRATE" not in payload['allowed_actions']:
                    raise Exception('MIGRATE not supported')

                instance_ids = (self.get_session_instance_ids(
                                payload['instance_ids'],
                                payload['session_id']))
                self.log.info('sample app manager got instances: %s' %
                              instance_ids)
                instance_actions = dict()
                for instance_id in instance_ids:
                    instance_actions[instance_id] = "MIGRATE"
                    if instance_id == self.active_instance_id:
                        self.switch_over_ha_instance()
                reply['instance_actions'] = instance_actions
                reply_state = 'ACK_PREPARE_MAINTENANCE'

            elif state == 'PLANNED_MAINTENANCE':
                if "MIGRATE" not in payload['allowed_actions']:
                    raise Exception('MIGRATE not supported')

                instance_ids = (self.get_session_instance_ids(
                                payload['instance_ids'],
                                payload['session_id']))
                self.log.info('sample app manager got instances: %s' %
                              instance_ids)
                instance_actions = dict()
                for instance_id in instance_ids:
                    instance_actions[instance_id] = "MIGRATE"
                    if instance_id == self.active_instance_id:
                        self.switch_over_ha_instance()
                reply['instance_actions'] = instance_actions
                reply_state = 'ACK_PLANNED_MAINTENANCE'

            elif state == 'INSTANCE_ACTION_DONE':
                self.log.info('%s' % payload['instance_ids'])

            else:
                raise Exception('sample app manager received event with'
                                ' unknown state %s' % state)

            if reply_state:
                reply['session_id'] = payload['session_id']
                reply['state'] = reply_state
                url = payload['reply_url']
                self.log.info('sample app manager reply: %s' % reply)
                requests.put(url, data=json.dumps(reply), headers=self.headers)

            return 'OK'

        @app.route('/shutdown', methods=['POST'])
        def shutdown():
            self.log.info('shutdown app manager server at %s' % time.time())
            func = request.environ.get('werkzeug.server.shutdown')
            if func is None:
                raise RuntimeError('Not running with the Werkzeug Server')
            func()
            return 'app manager shutting down...'

        app.run(host="0.0.0.0", port=self.port)