This post introduces 2 basic solutions about docker monitoring. And what's more, we want to dig into metrics exporting methods. In order to do some data analysis, we want to extract metrics in a usable/simple format (e.g. CSV). It's easy to query some metrics, but the tools paid less attention to export multiple metrics joined by timestamp(this can be some scenarios about data analysis, or dev daily report), we are going to build a small tools for this.