if [[ ! -f "${CLUSTER_TOPOLOGY_CONFIG_FILE}" ]]; then
    log 'cluster topology configuration file is not specified'
    exit 1
  fi

  export CLUSTER_NAMES
  export CLUSTER_POD_SUBNETS
  export CLUSTER_SVC_SUBNETS
  export CLUSTER_NETWORK_ID

  KUBE_CLUSTERS=$(jq '.[] | select(.kind == "Kubernetes" or .kind == null)' "${CLUSTER_TOPOLOGY_CONFIG_FILE}")

  while read -r value; do
    CLUSTER_NAMES+=("$value")

   Core changes:

  * Support for load balancers with source ranges

#### AWS

Core changes:

  * Support for ELBs with complex configurations: better subnet selection with
multiple subnets, and internal ELBs
  * Support for VPCs with private dns names
  * Multiple fixes to EBS volume mounting code for robustness, and to support
mounting the full number of AWS recommended volumes.