I bought it right when the lecture came out, and now I've been taking it intermittently for about a month due to work-related needs. First of all, I recommend it to all DevOps/engineers/developers who operate Prometheus or plan and review operations. In particular, I can feel that a lot of effort was put into ova, vagrant, source code (helm chart), .cmd (input command), etc. so that I could follow the practice. Thanks to you, I learned a lot. Thank you.