Comment 5 for bug 1781918

hi @hongbin,
    controller and conmpute01 zun version really inconsistent.
    controller Master
    conmpute01 stable/queens

I chenged the Zun version of compute01 to Master deployment.there was a very strange mistake.

compute node ：
[root@compute01 zun]# tail -f /var/log/zun/zun-compute.log

 '--config-file', '/etc/zun/zun.conf', '--privsep_context', 'zun.common.privileged.default', '--privsep_sock_path', '/tmp/tmpnfqB7A/privsep.sock']
2018-07-17 15:31:39.768 26094 WARNING oslo.privsep.daemon [-] privsep log:
2018-07-17 15:31:39.769 26094 WARNING oslo.privsep.daemon [-] privsep log: We trust you have received the usual lecture from the local System
2018-07-17 15:31:39.769 26094 WARNING oslo.privsep.daemon [-] privsep log: Administrator. It usually boils down to these three things:
2018-07-17 15:31:39.769 26094 WARNING oslo.privsep.daemon [-] privsep log:
2018-07-17 15:31:39.769 26094 WARNING oslo.privsep.daemon [-] privsep log: #1) Respect the privacy of others.
2018-07-17 15:31:39.770 26094 WARNING oslo.privsep.daemon [-] privsep log: #2) Think before you type.
2018-07-17 15:31:39.770 26094 WARNING oslo.privsep.daemon [-] privsep log: #3) With great power comes great responsibility.
2018-07-17 15:31:39.770 26094 WARNING oslo.privsep.daemon [-] privsep log:
2018-07-17 15:31:39.770 26094 WARNING oslo.privsep.daemon [-] privsep log: sudo: no tty present and no askpass program specified
2018-07-17 15:31:42.268 26094 CRITICAL oslo.privsep.daemon [-] privsep helper command exited non-zero (1)
2018-07-17 15:31:42.269 26094 ERROR oslo_service.periodic_task [-] Error during Manager.inventory_host: FailedToDropPrivileges: privsep helper command exited non-zero (1)
2018-07-17 15:31:42.269 26094 ERROR oslo_service.periodic_task Traceback (most recen