infra/modules/shared/telegraf.nix
zowoq 06b72a6b95 modules/shared/telegraf: add /etc/flake-inputs.prom
allows the flake inputs to be changed without restarting telegraf
2024-05-09 22:31:50 +00:00

32 lines
1 KiB
Nix

{ inputs, lib, ... }:
{
environment.etc =
let
inputsWithDate = lib.filterAttrs (_: input: input ? lastModified) inputs.self.inputs;
flakeAttrs = input: (lib.mapAttrsToList (n: v: ''${n}="${v}"'')
(lib.filterAttrs (_: v: (builtins.typeOf v) == "string") input));
lastModified = name: input: ''
flake_input_last_modified{input="${name}",${lib.concatStringsSep "," (flakeAttrs input)}} ${toString input.lastModified}'';
in
{
"flake-inputs.prom" = {
text = builtins.unsafeDiscardStringContext ''
# HELP flake_registry_last_modified Last modification date of flake input in unixtime
# TYPE flake_input_last_modified gauge
${lib.concatStringsSep "\n" (lib.mapAttrsToList lastModified inputsWithDate)}
'';
};
};
services.telegraf.extraConfig.inputs = {
file = [
{
data_format = "prometheus";
files = [ "/etc/flake-inputs.prom" ];
}
];
prometheus = {
metric_version = 2;
};
};
}