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modules/shared/telegraf: add /etc/flake-inputs.prom

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allows the flake inputs to be changed without restarting telegraf
This commit is contained in:
zowoq 2024-05-04 18:54:17 +10:00
parent 21c49c5357
commit 06b72a6b95
4 changed files with 25 additions and 30 deletions
modules
darwin/common
default.nixflake-inputs.nix
nixos/common
default.nix
shared
telegraf.nix

1
modules/darwin/common/default.nix
View file

@ -2,7 +2,6 @@
{
imports = [
./apfs-cleanup.nix
./flake-inputs.nix
./reboot.nix
./telegraf.nix
./upgrade-diff.nix

27
modules/darwin/common/flake-inputs.nix
View file

@ -1,27 +0,0 @@
{ inputs, lib, pkgs, ... }:
{
services.telegraf.extraConfig.inputs.file =
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}'';
# avoid adding store path references on flakes which me not need at runtime.
promText = 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)}
'';
in
[
{
data_format = "prometheus";
files = [
(pkgs.writeText "flake-inputs.prom" promText)
];
}
];
}

2
modules/nixos/common/default.nix
View file

@ -24,8 +24,6 @@
Restart = "on-failure";
};
srvos.flake = inputs.self;
boot.kernelPackages = pkgs.lib.mkIf (!config.boot.supportedFilesystems.zfs or false) pkgs.linuxPackages_latest;
zramSwap.enable = true;

25
modules/shared/telegraf.nix
View file

@ -1,5 +1,30 @@
{ 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;
};