@content
    def GET(self, cluster_id):
        cluster = self.get_object_or_404(objects.Cluster, cluster_id)
        roles_names = six.iterkeys(objects.Cluster.get_roles(cluster))
        return [RoleSerializer.serialize_from_cluster(cluster, name)
                for name in roles_names]
Send SIGABRT to child processes to instruct them to stop
dataset/ETHPy150Open openstack/fuel-web/nailgun/nailgun/api/v1/handlers/role.py/ClusterRolesCollectionHandler.GET--crossover with--dataset/ETHPy150Open gmr/tinman/tinman/controller.py/Controller.shutdown