#Must be run with role foo, since foo has sudo access or other permissions
@hosts(*env.roledefs['foo'])
def do_foo_actions():
    sudo("mkdir /usr/local/program")
    sudo("chown -R bar:bar /usr/local/program")

#Most of the work here is done in role bar. But the folder /usr/local/program must exist before we can deploy
@hosts(*env.roledefs['bar'])
def deploy_program():
    for h in env.roledefs['foo']:
        with settings(host_string=h):
            do_foo_actions()
    #From here on out, commands will be run as hadoop rather than hadoopadmin
    put(..., "/usr/local/program")