apiVersion: v1
kind: ReplicationController
metadata:
  name: nginx
spec:
  replicas: 3
  selector:
    app: nginx
  template:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

$ kubectl create -f ./replication.yaml
replicationcontrollers/nginx

$ kubectl describe replicationcontrollers/nginx
Name:           nginx
Namespace:      default
Image(s):       nginx
Selector:       app=nginx
Labels:         app=nginx
Replicas:       3 current / 3 desired
Pods Status:    0 Running / 3 Waiting / 0 Succeeded / 0 Failed
Events:
  FirstSeen                             LastSeen                        Count   From
SubobjectPath   Reason                  Message
  Thu, 24 Sep 2015 10:38:20 -0700       Thu, 24 Sep 2015 10:38:20 -0700 1
{replication-controller }                       SuccessfulCreate        Created pod: nginx-qrm3m
  Thu, 24 Sep 2015 10:38:20 -0700       Thu, 24 Sep 2015 10:38:20 -0700 1
{replication-controller }                       SuccessfulCreate        Created pod: nginx-3ntk0
  Thu, 24 Sep 2015 10:38:20 -0700       Thu, 24 Sep 2015 10:38:20 -0700 1
{replication-controller }                       SuccessfulCreate        Created pod: nginx-4ok8v