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")