def _site_users():
    userlist = sudo("cat /etc/passwd | awk '/site/'").split('\n')
    siteuserlist = [user.split(':')[0] for user in userlist if 'site_' in user]
    return siteuserlist
When the cluster state includes one container that has a dataset with
dataset/ETHPy150Open bretth/woven/woven/webservers.py/_site_users--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/control/test/test_httpapi.py/ContainerStateTestsMixin.test_one_container_maximum_size