anchor.diff:  <2> If you do not provide these parameters and values, the installation program
   provides the default value.
   <3> You can optionally provide the `sshKey` value that you use to access the
  -machines in your cluster.+machines in your cluster.
  +<4> To configure faster storage for etcd, especially for larger clusters, set the
  +storage type as `io1` and set `iops` to `2000`.
  
positive.code:   platform:
      aws:
        rootVolume:
          iops: 4000
          size: 500
          type: io1
        type: c5.9xlarge
        zones:
        - us-west-2c
    replicas: 5
  
negative.code:       zones:
        - us-west-2a
        - us-west-2b
        rootVolume:
          iops: 4000
          size: 500
          type: io1
        type: m5.xlarge
    replicas: 3
  compute: <2>
  