def on_get(self, req, resp):
"""
Handles GET requests for Clusters.
:param req: Request instance that will be passed through.
:type req: falcon.Request
:param resp: Response instance that will be passed through.
:type resp: falcon.Response
"""
clusters_dir, error = cherrypy.engine.publish(
'store-get', '/commissaire/clusters/')[0]
if error:
self.logger.warn(
'Etcd does not have any clusters. Returning [] and 404.')
resp.status = falcon.HTTP_404
req.context['model'] = None
return
results = []
# Don't let an empty clusters directory through
if len(clusters_dir._children):
for cluster in clusters_dir.leaves:
results.append(cluster.key.split('/')[-1])
resp.status = falcon.HTTP_200
req.context['model'] = Clusters(clusters=results)
else:
self.logger.debug('Etcd has a clusters directory but no content.')
resp.status = falcon.HTTP_200
req.context['model'] = None
def on_delete(self, req, resp, address):
"""
Handles the Deletion of a Host.
:param req: Request instance that will be passed through.
:type req: falcon.Request
:param resp: Response instance that will be passed through.
:type resp: falcon.Response
:param address: The address of the Host being requested.
:type address: str
"""
resp.body = '{}'
store_manager = cherrypy.engine.publish('get-store-manager')[0]
try:
host = Host.new(address=address)
WATCHER_QUEUE.dequeue(host)
store_manager.delete(host)
self.logger.debug(
'Deleted host {0} and dequeued it from the watcher.'.format(
host.address))
resp.status = falcon.HTTP_200
except:
resp.status = falcon.HTTP_404
# Also remove the host from all clusters.
# Note: We've done all we need to for the host deletion,
# so if an error occurs from here just log it and
# return.
try:
clusters = store_manager.list(Clusters(clusters=[]))
except:
self.logger.warn('Store does not have any clusters')
return
for cluster in clusters.clusters:
try:
self.logger.debug('Checking cluster {0}'.format(cluster.name))
if address in cluster.hostset:
self.logger.info('Removing {0} from cluster {1}'.format(
address, cluster.name))
cluster.hostset.remove(address)
store_manager.save(cluster)
self.logger.info(
'{0} has been removed from cluster {1}'.format(
address, cluster.name))
except:
self.logger.warn(
'Failed to remove {0} from cluster {1}'.format(
address, cluster.name))
