Might be worth installing netdata plugins into your hosts.
https://xcp-ng.org/forum/topic/2288/netdata-package-is-now-available-in-xcp-ng
Installing Netdata manually
...Just run yum install netdata-ui on each host you want to monitor and that's it. You can just go on http://host_address:19999 and view the different metrics.
If you want a centralized netdata and stream everything to a "central" host, feel free to read Netdata documentation on how to do so!