Using rancher cluster on 4 different hosts in different regions. Sometimes I face different problems with networking, but they are mostly fixed restarting the containers. Its just hard to detect or diagnose them in time. Integrated network state monitoring could be such a great feature for Rancher!
Thank you for the feedback, the networking issues are definitely on my radar.
I had no problem running a cross-cloud cluster with rancher 1.x. You simply have to make sure the IPSec ports are open between hosts for the overlay network.