Measuring latency/jitter/throughput/etc between multiple sites

Hi all,

Looking for a good approach to take measurements of these metrics between multiple sites (~20). Ideally something scalable with not a ton of manual triggering. So something that can just run in the background and take measurements periodically (once a day or something?) and record results.

I expect to have a host at every site that would be facilitating these tests/measurements.

And ideally it's something open source/free and simple and a bit turnkey. Obviously I can set up iperf at every site, icmp/ping sweeps at every site, etc, but that's going to be a huge slog to get measurements between each site if it's all manual.

Maybe there's some FOSS solution out there that does what I'm looking for? Again, not looking for buy some mega software for this if it can be avoided. Just looking for those few metrics to get a 'baseline' of network performance between all our sites, that can run at regular intervals and records results.

Thanks!