$ for c in $(kubectl config view -o jsonpath='{.contexts[\*].name}'); do kubectl --context=$c create -f configmaps/zonefetch.yaml; done
 ```



Let’s have a quick peek at our Replica Set:




```
$ cat replicasets/nginx-rs.yaml


apiVersion: extensions/v1beta1  
kind: ReplicaSet  
metadata:  
  name: nginx  
  labels:  
    app: nginx  
    type: demo  
spec:  
  replicas: 9  
  template:  
    metadata:  
      labels:  
        app: nginx  
    spec:  
      containers:  
      - image: nginx  
        name: frontend  
        ports:  
          - containerPort: 80  
        volumeMounts:  
        - name: html-dir  
          mountPath: /usr/share/nginx/html  
      - image: busybox  
        name: zone-fetcher  
        command:  
          - "/bin/sh"  
          - "-c"  
          - "/zonefetch/zonefetch.sh"  
        volumeMounts:  
        - name: zone-fetch  
          mountPath: /zonefetch  
        - name: html-dir  
          mountPath: /usr/share/nginx/html  
      volumes:  
        - name: zone-fetch  
          configMap:  
            defaultMode: 0777  
            name: zone-fetch  
        - name: html-dir  
          emptyDir:  
            medium: ""
 ```



The Replica Set consists of 9 replicas, spread evenly across 9 clusters within the Cluster Federation. Annotations can also be used to control which clusters Pods are scheduled to. This is accomplished by adding annotations to the Replica Set spec, as follows:




```
apiVersion: extensions/v1beta1  
kind: ReplicaSet  
metadata:  
  name: nginx-us  
  annotations:  
    federation.kubernetes.io/replica-set-preferences: ```  
        {  
            "rebalance": true,  
            "clusters": {  
                "gce-us-central1-a": {  
                    "minReplicas": 2,  
                    "maxReplicas": 4,  
                    "weight": 1  
                },  
                "gce-us-central10b": {  
                    "minReplicas": 2,  
                    "maxReplicas": 4,  
                    "weight": 1  
                }  
            }  
        }
 ```



For the purpose of our demo, we’ll keep things simple and spread our Pods evenly across the Cluster Federation.



Let’s create the federated Replica Set:




```
$ kubectl --context=federation-cluster create -f replicasets/nginx-rs.yaml
 ```



Verify the Replica Sets and Pods were created in each cluster:




```
$ for c in $(kubectl config view -o jsonpath='{.contexts[\*].name}'); do kubectl --context=$c get rs; done  

NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         42s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         14m  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         45s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         46s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         47s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         48s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         49s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         49s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         49s


$ for c in $(kubectl config view -o jsonpath='{.contexts[\*].name}'); do kubectl --context=$c get po; done  

NAME          READY     STATUS    RESTARTS   AGE  
nginx-ph8zx   2/2       Running   0          25s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-sbi5b   2/2       Running   0          27s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-pf2dr   2/2       Running   0          28s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-imymt   2/2       Running   0          30s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-9cd5m   2/2       Running   0          31s