Meta-data service regularly stalls/errors

This may or may not be related to my other post (though don’t normally happen together);

Quite regularly I’m experiencing the meta-data service either stalling (or at least not outputting any logs) or unable to discover self with errors around such. Sadly I don’t have an example of the latter right now. I’ll add if when it happens again.

Restarting the network services stack will generally rectify the situation. Restarting the one host specific meta-data service in question sometimes works, but stopping and starting the stack is more reliable.

Any ideas?

Here’s the Environment that is running;

Rancher - 1.6.12
Rancher Agent - 1.2.7
Rancher Container Orchestration - Cattle
Docker - 17.06.2-ce
Host/Server OS - Ubuntu 16.04.3 LTS
Cloud - Azure