def get_instance(self):
""" This returns a boto Instance resource; if boto can't find the instance or if no entry for instance in database,
it raises Server.DoesNotExist error and removes database entry if appropriate """
self.log.debug("function get_instance for user %s" % self.user.name)
server = Server.get_server(self.user.name)
resource = yield retry(boto3.resource,
"ec2",
region_name=SERVER_PARAMS["REGION"])
try:
ret = yield retry(resource.Instance, server.server_id)
self.log.debug("return for get_instance for user %s: %s" %
(self.user.name, ret))
# boto3.Instance is lazily loaded. Force with .load()
yield retry(ret.load)
if ret.meta.data is None:
Server.remove_server(server.server_id)
raise Server.DoesNotExist()
return ret
except ClientError as e:
self.log.error("get_instance client error: %s" % e)
if "InvalidInstanceID.NotFound" not in str(e):
self.log.error("Couldn't find instance for user '%s'" %
self.user.name)
Server.remove_server(server.server_id)
raise Server.DoesNotExist()
raise e
