post_install() { getent group grafana >/dev/null || groupadd -r grafana getent passwd grafana >/dev/null || useradd -d /var/lib/grafana -g grafana -r -M -s /bin/false grafana chown grafana:grafana /var/{lib,log}/grafana } post_upgrade() { post_install } post_remove() { userdel grafana }