Victoria metrics is just storage/aggregation/scraping and a simple UI for graphs (generally you want Grafana in front of it for most power/convenience). It also has vmagent which acts as aggregation/metric relabeling/scraping/format conversion in front of it

Then you'd either:

* push into it directly using prometheus write format * push using other formats supported (there is a bunch so if you already have infra to get metrics you can often just plug it in * set up vmagent to scrape destinations (uses same config format as prometheus)

I use it for a while now both for work (few hundred servers) and for home stuff and it is excellent, small and low on disk storage

(yes that sounds like PR, no, it is not, I'm just very happy user)