cAdvisor is pretty good at what it does. At its core, it's a metrics collections daemon that iterates over cgroup controllers and sends them to a backend server

cAdvisor is pretty good at what it does. At its core, it's a metrics collections daemon that iterates over cgroup controllers and sends them to a backend server for centralized alerting and long-term retention. It does other helpful things with the docker API such as extracting container labels so that you can rightsize resource allocations based on workload metadata. What's not to like?