netdata is a metrics tool, which comes with a lot of sane preconfiguration. It contains of various plugins, which need to be enabled sometimes with additional effort.

Adding node

Install the netdata package and enable the service.
When adding new node in the web interface you get a token, write that token to /var/lib/netdata/cloud.d/token
As root run nix-shell -p netdata --run "netdata-claim.sh"

Python Plugins

nvidia-smi

To enable the nvidia-smi plugin you have to make sure nvidia-smi can be called by netdata.

systemd.services.enable = true;
systemd.services.netdata.path = [pkgs.linuxPackages.nvidia_x11];
services.netdata.configDir."python.d.conf" = pkgs.writeText "python.d.conf" ''
  nvidia_smi: yes
'';

samba

To enable samba plugin a lot of things need to be done.

Still I could not make samba to work, because systemd services seem to be forbidden to run sudo. Please update if you are able to make it work.

systemd.services.enable = true;
services.netdata.configDir."python.d.conf" = pkgs.writeText "python.d.conf" ''
  samba: yes
'';

# add samba and sudo to path of python plugin
systemd.services.netdata.path = [ pkgs.sudo pkgs.samba ];

# permit to run sudo smbstatus -P
security.sudo.extraConfig = ''
  netdata ALL=(root) NOPASSWD: ${pkgs.samba}/bin/smbstatus
'';
# as documented here : https://learn.netdata.cloud/docs/agent/collectors/python.d.plugin/samba
# but seem not to work
systemd.services.netdata.serviceConfig.CapabilityBoundingSet = ["~"];