In case one node is down how switch other node automatically

Dear friends,

I am using Rancher 2.0.4, I have one doubt In case one node is down how to switch another node automatically, for example, I am using node 1 with three containers, and also I have one more node as node 2, In my node 1 resource limit reached 80 % CPU usage, how it automatically switch node 2 with the same container without downtime.