Thanks for the advise @JeffBerntsen, i tried using cloudflare's and google's NTP IP's instead of their domains.
192.168.1.8 (debian) is a VM, configured to auto-start, and it's running inside the xcp-ng host 192.168.1.7
I'm rebooting the xcp-ng host (from the xsconsole) and pinging the debian machine 192.168.1.8 to determine how long it takes to start replying to ICMP.
Here's the times I got (min:sec):
- NTP DISABLED: 1:14, 1:12, 1:12, 1:12 (avg 1:12)
- NTP enabled FQDN: 1:43, 1:43, 1:48, 1:52 (avg 1:46)
- NTP enabled IP: 1:27, 1:23, 1:18, 1:21 (avg 1:22)
So using NTP with an IP and hoping that it doesn't change seems to be the a good option.
Using the FQDN works as well since 30 seconds won't kill anyone and this is the option I'll use, but just was curious if this is something expected @stormi