monitor stub url: https://cloud-guru.github.io/monitors/ hot working: telegraf openstack influxdata/telegraf#2013 gophercloud/gophercloud#178 https://docs.openstack.org/developer/performance-docs/methodologies/monitoring/index.html#telegraf-deployment-and-configuration-files https://www.w3cschool.cn/doc_influxdata/dict cold working: collectd, qdr, prometheus grafana https://www.youtube.com/embed/adNVWly9sCU?rel=0&modestbranding=1