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authordongwenjuan <dong.wenjuan@zte.com.cn>2017-07-03 10:03:35 +0800
committerdongwenjuan <dong.wenjuan@zte.com.cn>2017-07-25 13:51:05 +0800
commit0b2494f01dc11091636b46fa49aeab43292f9d28 (patch)
tree4b92c16068a3f8d591824a8eea751523db935148 /tests/inspector/sample.py
parent7e0ab6e2149df22455e58eb363eb291a985514de (diff)
refactor sample inspector
JIRA: DOCTOR-98 Change-Id: I7110b680d0a0c64b1b2666abcea183e73373dca7 Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>
Diffstat (limited to 'tests/inspector/sample.py')
-rw-r--r--tests/inspector/sample.py151
1 files changed, 151 insertions, 0 deletions
diff --git a/tests/inspector/sample.py b/tests/inspector/sample.py
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+++ b/tests/inspector/sample.py
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+##############################################################################
+# Copyright (c) 2017 ZTE 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
+##############################################################################
+import collections
+from flask import Flask
+from flask import request
+import json
+import time
+from threading import Thread
+import requests
+
+from identity_auth import get_identity_auth
+from identity_auth import get_session
+from os_clients import nova_client
+from inspector.base import BaseInspector
+
+
+class SampleInspector(BaseInspector):
+ event_type = 'compute.host.down'
+
+ def __init__(self, conf, log):
+ super(SampleInspector, self).__init__(conf, log)
+ self.inspector_url = self.get_inspector_url()
+ self.novaclients = list()
+ self._init_novaclients()
+ # Normally we use this client for non redundant API calls
+ self.nova = self.novaclients[0]
+
+ self.servers = collections.defaultdict(list)
+ self.hostnames = list()
+ self.app = None
+
+ def _init_novaclients(self):
+ self.NUMBER_OF_CLIENTS = self.conf.instance_count
+ auth = get_identity_auth(project=self.conf.doctor_project)
+ session = get_session(auth=auth)
+ for i in range(self.NUMBER_OF_CLIENTS):
+ self.novaclients.append(
+ nova_client(self.conf.nova_version, session))
+
+ def _init_servers_list(self):
+ self.servers.clear()
+ opts = {'all_tenants': True}
+ servers = self.nova.servers.list(search_opts=opts)
+ for server in servers:
+ try:
+ host = server.__dict__.get('OS-EXT-SRV-ATTR:host')
+ self.servers[host].append(server)
+ self.log.debug('get hostname=%s from server=%s' % (host, server))
+ except Exception as e:
+ self.log.info('can not get hostname from server=%s' % server)
+
+ def get_inspector_url(self):
+ return 'http://%s:%s' % (self.conf.inspector.ip, self.conf.inspector.port)
+
+ def start(self):
+ self.log.info('sample inspector start......')
+ self._init_servers_list()
+ self.app = InspectorApp(self.conf.inspector.port, self, self.log)
+ self.app.start()
+
+ def stop(self):
+ self.log.info('sample inspector stop......')
+ if not self.app:
+ return
+ for hostname in self.hostnames:
+ self.nova.services.force_down(hostname, 'nova-compute', False)
+
+ headers = {
+ 'Content-Type': 'application/json',
+ 'Accept': 'application/json',
+ }
+ url = '%s%s' % (self.inspector_url, 'shutdown') \
+ if self.inspector_url.endswith('/') else \
+ '%s%s' % (self.inspector_url, '/shutdown')
+ requests.post(url, data='', headers=headers)
+
+ def handle_events(self, events):
+ for event in events:
+ hostname = event['details']['hostname']
+ event_type = event['type']
+ if event_type == self.event_type:
+ self.hostnames.append(hostname)
+ self.disable_compute_host(hostname)
+
+ def disable_compute_host(self, hostname):
+ threads = []
+ if len(self.servers[hostname]) > self.NUMBER_OF_CLIENTS:
+ # TODO(tojuvone): This could be enhanced in future with dynamic
+ # reuse of self.novaclients when all threads in use
+ self.log.error('%d servers in %s. Can handle only %d'%(
+ self.servers[hostname], hostname, self.NUMBER_OF_CLIENTS))
+ for nova, server in zip(self.novaclients, self.servers[hostname]):
+ t = ThreadedResetState(nova, "error", server, self.log)
+ t.start()
+ threads.append(t)
+ for t in threads:
+ t.join()
+ self.nova.services.force_down(hostname, 'nova-compute', True)
+ self.log.info('doctor mark host(%s) down at %s' % (hostname, time.time()))
+
+
+class ThreadedResetState(Thread):
+
+ def __init__(self, nova, state, server, log):
+ Thread.__init__(self)
+ self.nova = nova
+ self.state = state
+ self.server = server
+ self.log = log
+
+ def run(self):
+ self.nova.servers.reset_state(self.server, self.state)
+ self.log.info('doctor mark vm(%s) error at %s' % (self.server, time.time()))
+
+
+class InspectorApp(Thread):
+
+ def __init__(self, port, inspector, log):
+ Thread.__init__(self)
+ self.port = port
+ self.inspector = inspector
+ self.log = log
+
+ def run(self):
+ app = Flask('inspector')
+
+ @app.route('/events', methods=['PUT'])
+ def event_posted():
+ self.log.info('event posted in sample inspector at %s' % time.time())
+ self.log.info('sample inspector = %s' % self.inspector)
+ self.log.info('sample inspector received data = %s' % request.data)
+ events = json.loads(request.data)
+ self.inspector.handle_events(events)
+ return "OK"
+
+ @app.route('/shutdown', methods=['POST'])
+ def shutdown():
+ self.log.info('shutdown inspector app 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 'inspector app shutting down...'
+
+ app.run(host="0.0.0.0", port=self.port)