--- /dev/null
+##############################################################################
+# 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 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.headers = {
+ 'Content-Type': 'application/json',
+ 'Accept': 'application/json'}
+ self.auth = get_identity_auth(project=self.conf.doctor_project)
+ self.nova = nova_client(self.conf.nova_version,
+ get_session(auth=self.auth))
+ 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))
+ instance.add_floating_ip(self.floating_ip)
+ 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):
+ data = {'session_id': session_id}
+ ret = requests.get(url, data=json.dumps(data), 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 == 'DOWN_SCALE':
+ # 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_DOWN_SCALE'
+
+ 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)
Code Review / doctor.git / blobdiff