anchor.diff:  Validate the cluster:
   
   ```
  -$ kops validate cluster --name=$KOPS_CLUSTER_NAME
  +$ kops validate cluster --name=example.cluster.com
   Validating cluster example.cluster.com
   
   INSTANCE GROUPS
   NAME      ROLE  MACHINETYPE MIN MAX SUBNETS
  -master-us-east-1a Master  m3.medium 1 1 us-east-1a
  -master-us-east-1b Master  m3.medium 1 1 us-east-1b
  -master-us-east-1c Master  c4.large  1 1 us-east-1c
  -nodes     Node  t2.medium 5 5 us-east-1a,us-east-1b,us-east-1c
  +master-eu-central-1a Master  m3.medium 1 1 eu-central-1a
  +master-eu-central-1b Master  m3.medium 1 1 eu-central-1b
  +master-eu-central-1c Master  c4.large  1 1 eu-central-1c
  +nodes     Node  t2.medium 5 5 eu-central-1a,eu-central-1b,eu-central-1c
   
   NODE STATUS
   NAME        ROLE  READY
  
positive.code: 
  By default, `create cluster` command creates a single master node and two worker nodes in the specified zones.
  
  Create a Kubernetes cluster using the following command. This will create a cluster with a single master, multi-node and multi-az configuration:
  
      kops create cluster \
        --name $KOPS_CLUSTER_NAME \
        --zones $AWS_AVAILABILITY_ZONES \
        --state $KOPS_STATE_STORE \
        --yes
  
  The `create cluster` command only creates and stores the cluster config in the S3 bucket. Adding `--yes` option ensures that the cluster is immediately created as well.
  
  Alternatively, you may not specify the `--yes` option as part of the `kops create cluster` command. Then you can use `kops edit cluster cluster.k8s.local` command to view the current cluster state and make changes. The cluster creation, in that case, is started with the following command:
  
      kops update cluster $KOPS_CLUSTER_NAME --yes
  
  The cluster can be verified as shown:
  
  ```
  $ kops validate cluster --name=$KOPS_CLUSTER_NAME
  Validating cluster example.cluster.com
  
  INSTANCE GROUPS
  NAME      ROLE  MACHINETYPE MIN MAX SUBNETS
  master-us-east-1d Master  m3.medium 1 1 us-east-1d
  nodes     Node  t2.medium 2 2 us-east-1d,us-east-1e
  
  NODE STATUS
  NAME        ROLE  READY
  
negative.code: 
  For a cluster created using kops, this can be done by editing the cluster configuration using the command shown:
  
    kops edit cluster --name example.cluster.k8s.local
  
  This will open up the cluster configuration in a text editor. Update the `spec` attribute such that it looks like as shown:
  
  