rysolv VS prom-client

I really liked rysolv but the project is currently broken and unmaintained, fixing it does not seem like too much of a problem.

I would advice against it, people might not like to contribute to a permissive licensed project as they will worry it will become closed source (like reddit) , see this and this for more.

rysolv.

rysolv (Just watch out for this bug).

There is libretexts and rysolv.

That's pretty much rysolv (there are other platforms for that, but last i checked they are not as good).

There is this weird glitch with chromium that it sometimes does not work under certain types of links, but for some it works well, i fixed it and it should . the bug is also reported here.

Websites prove their identity via certificates, which are valid for a set time period. The certificate for www.rysolv.com expired on 7/28/2022.

The numbers do seem a little too small, i think it should be viable economically for freelance developers to work on this, you might also want to provide links to rysolv (The best open source platform for bounties last i checked IMO) to allow third party to also contribute bounties.

There is also rysolv.

prom-client

This approach will work as long as you don’t need to run multiple instances of the application in cluster mode. For collecting metrics in cluster mode, prom-client provides a good example with metric aggregation. But what if you’re running the application through the process manager PM2, where you don’t have access to the running cluster?

You would need to build a custom endpoint if it's a custom application that Prometheus can scrape but there are many libraries for that like prom-client for NodeJS or prometheus-net for C#. The list of client libraries can be found here.

For node, try this: https://github.com/siimon/prom-client

The metric itself is process_start_time_seconds (from the prom-client NodeJS package), which returns the timestamp in seconds corresponding to the start time of the process.

Consumer lag will quickly show any functional or technical issue with your event stream. By using the code examples from this blogpost, you can avoid having to dive into the SDKs yourself. Of course, you can adopt the metric collection to send the metric to the logs or to another metrics system like prometheus, datadog, or open telemetry.

There is a node client library for backend dev.