Comment 33 for bug 1818614

cause of this issue:

The problem is that the following is being passed to neutron-keepalived-state-change when spawned:

'--AGENT-root_helper_daemon=%s' % self.agent_conf.AGENT.root_helper_daemon

And in my env root_helper_daemon is not configured or running (which is the neutron default fwiw).

So we need to not pass that if it is not set so that neutron-keepalive-state-change won't try to use it so e.g. right now in ps i have:

... --AGENT-root_helper=sudo /usr/bin/neutron-rootwrap /etc/neutron/rootwrap.conf --AGENT-root_helper_daemon=None

The "None" is what is breaking it.