use_cloud_config="true"
    cat <<EOF >>/etc/gce.conf
regional = ${MULTIMASTER}
EOF
  fi
  if [[ -n "${GCE_ALPHA_FEATURES:-}" ]]; then
    use_cloud_config="true"
    # split GCE_ALPHA_FEATURES into an array by comma.
    IFS=',' read -r -a alpha_features <<< "${GCE_ALPHA_FEATURES}"
    for feature in "${alpha_features[@]}"; do
      cat <<EOF >>/etc/gce.conf
alpha-features = ${feature}
EOF
    done