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##############################################################################
# Copyright (c) 2016 NEC 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 argparse
import collections
from flask import Flask
from flask import request
import json
import os
import time
import novaclient.client as novaclient
import nova_force_down
class DoctorInspectorSample(object):
nova_api_version = '2.11'
def __init__(self):
self.servers = collections.defaultdict(list)
self.nova = novaclient.Client(self.nova_api_version,
os.environ['OS_USERNAME'],
os.environ['OS_PASSWORD'],
os.environ['OS_TENANT_NAME'],
os.environ['OS_AUTH_URL'],
connection_pool=True)
# check nova is available
self.nova.servers.list(detailed=False)
self.init_servers_list()
def init_servers_list(self):
opts = {'all_tenants': True}
servers=self.nova.servers.list(search_opts=opts)
self.servers.clear()
for server in servers:
try:
host=server.__dict__.get('OS-EXT-SRV-ATTR:host')
self.servers[host].append(server)
app.logger.debug('get hostname=%s from server=%s' % (host, server))
except Exception as e:
app.logger.debug('can not get hostname from server=%s' % server)
def disable_compute_host(self, hostname):
for server in self.servers[hostname]:
self.nova.servers.reset_state(server, 'error')
# NOTE: We use our own client here instead of this novaclient for a
# workaround. Once keystone provides v2.1 nova api endpoint
# in the service catalog which is configured by OpenStack
# installer, we can use this:
#
# self.nova.services.force_down(hostname, 'nova-compute', True)
#
nova_force_down.force_down(hostname)
app = Flask(__name__)
app.debug = True
inspector = DoctorInspectorSample()
@app.route('/events', methods=['POST'])
def event_posted():
app.logger.debug('event posted at %s' % time.time())
app.logger.debug('inspector = %s' % inspector)
app.logger.debug('received data = %s' % request.data)
d = json.loads(request.data)
hostname = d['hostname']
event_type = d['type']
if event_type == 'compute.host.down':
inspector.disable_compute_host(hostname)
return "OK"
def get_args():
parser = argparse.ArgumentParser(description='Doctor Sample Inspector')
parser.add_argument('port', metavar='PORT', type=int, nargs='?',
help='a port for inspector')
return parser.parse_args()
def main():
args = get_args()
app.run(port=args.port)
if __name__ == '__main__':
main()
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