#cloud-config merge_how: dict(recurse_array)+list(append) write_files: - path: /etc/sysconfig/heat-params owner: "root:root" permissions: "0644" content: | KUBE_ALLOW_PRIV="$KUBE_ALLOW_PRIV" KUBE_MASTER_IP="$KUBE_MASTER_IP" WAIT_HANDLE="$WAIT_HANDLE" DOCKER_VOLUME="$DOCKER_VOLUME"