Error from server (NotFound): replicationcontrollers "db" not found

[allcentury]

I'm going through your repo here in an effort to deploy a rails app to GC. When I follow your tutorial I run:

$ kubectl run db --image=postgres --port=5432
deployment "db" created

Then I wait for the pod to start and when it does I see:

$ kubectl get po
NAME                  READY     STATUS    RESTARTS   AGE
db-3402021059-64hv8   1/1       Running   0          25s

I then run the next command you list (step 3 in GCE deploy):

$ kubectl expose rc db
Error from server (NotFound): replicationcontrollers "db" not found

I believe this command sets up a load balancer so the database can receive traffic from other pods but I'm not 100% sure.