Requesting HTTP://graphs.ntppool.net/graph/{server ip}/offset.png receives 503 by now. Maybe it is time to provide iframe SVG snippet suitable for embed?
EDIT: image online after 30 mins since posting.
Patches welcome! Javascript/UI development is really slow for me, so it keeps being bumped on the priority list for other things where I can make bigger improvements in the same amount of time.
I improved on this on the beta site a few months ago so the images are generated by “splash” instead of phantomjs. Splash was much easier to make run under Kubernetes and with the new setup there are less moving parts (as long as you don’t count kubernetes itself anyway…).
https://github.com/abh/ntppool/commit/f08e2f77c2140ebc23c0b556f7f22e42155648bd
Your SVG suggestion is still a good one… Really all the D3.js code I did could likely use a good review and cleanup.