Netdata

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 additional permissions and configurations will need to be set.

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.samba "/run/wrappers" ];

# permit to run sudo smbstatus -P
security.sudo.extraConfig = ''
  netdata ALL=(root) NOPASSWD: ${pkgs.samba}/bin/smbstatus
'';

# as documented here : https://github.com/netdata/netdata/blob/master/system/netdata.service.in
# review capabilityset above if other plugins are non functional
systemd.services.netdata.serviceConfig.CapabilityBoundingSet = ["CAP_SETGID"];

# enable profiling
services.samba.extraConfig = ''
smbd profiling level = on
'';