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nixos/telegraf: switch to setting types

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This allows to split up configuration into multiple modules
This commit is contained in:
Jörg Thalheim 2020-09-08 07:59:50 +02:00
parent 157d7354d6
commit 8edc4619ab
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GPG key ID: 003F2096411B5F92
2 changed files with 13 additions and 13 deletions
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21
nixos/modules/services/monitoring/telegraf.nix
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@ -5,14 +5,8 @@ with lib;
let
cfg = config.services.telegraf;
configFile = pkgs.runCommand "config.toml" {
buildInputs = [ pkgs.remarshal ];
preferLocalBuild = true;
} ''
remarshal -if json -of toml \
< ${pkgs.writeText "config.json" (builtins.toJSON cfg.extraConfig)} \
> $out
'';
settingsFormat = pkgs.formats.toml {};
configFile = settingsFormat.generate "config.toml" cfg.extraConfig;
in {
###### interface
options = {
@ -42,7 +36,7 @@ in {
extraConfig = mkOption {
default = {};
description = "Extra configuration options for telegraf";
type = types.attrs;
type = settingsFormat.type;
example = {
outputs = {
influxdb = {
@ -67,7 +61,7 @@ in {
systemd.services.telegraf = let
finalConfigFile = if config.services.telegraf.environmentFile == null
then configFile
else "/tmp/config.toml";
else "/var/run/telegraf/config.toml";
in {
description = "Telegraf Agent";
wantedBy = [ "multi-user.target" ];
@ -75,12 +69,15 @@ in {
serviceConfig = {
EnvironmentFile = config.services.telegraf.environmentFile;
ExecStartPre = lib.optional (config.services.telegraf.environmentFile != null)
''${pkgs.envsubst}/bin/envsubst -o /tmp/config.toml -i "${configFile}"'';
(pkgs.writeShellScript "pre-start" ''
umask 077
${pkgs.envsubst}/bin/envsubst -i "${configFile}" > /var/run/telegraf/config.toml
'');
ExecStart=''${cfg.package}/bin/telegraf -config ${finalConfigFile}'';
ExecReload="${pkgs.coreutils}/bin/kill -HUP $MAINPID";
RuntimeDirectory = "telegraf";
User = "telegraf";
Restart = "on-failure";
PrivateTmp = true;
# for ping probes
AmbientCapabilities = [ "CAP_NET_RAW" ];
};

5
nixos/tests/telegraf.nix
View file

@ -6,12 +6,15 @@ import ./make-test-python.nix ({ pkgs, ...} : {
machine = { ... }: {
services.telegraf.enable = true;
services.telegraf.environmentFile = pkgs.writeText "secrets" ''
SECRET=example
'';
services.telegraf.extraConfig = {
agent.interval = "1s";
agent.flush_interval = "1s";
inputs.exec = {
commands = [
"${pkgs.runtimeShell} -c 'echo example,tag=a i=42i'"
"${pkgs.runtimeShell} -c 'echo $SECRET,tag=a i=42i'"
];
timeout = "5s";
data_format = "influx";