nixpkgs-suyu/nixos/modules/services/logging/journalbeat.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.journalbeat;
lt6 = builtins.compareVersions cfg.package.version "6" < 0;
journalbeatYml = pkgs.writeText "journalbeat.yml" ''
name: ${cfg.name}
tags: ${builtins.toJSON cfg.tags}
${optionalString lt6 "journalbeat.cursor_state_file: /var/lib/${cfg.stateDir}/cursor-state"}
${cfg.extraConfig}
'';
in
{
options = {
services.journalbeat = {
enable = mkEnableOption "journalbeat";
package = mkOption {
type = types.package;
default = pkgs.journalbeat;
defaultText = "pkgs.journalbeat";
example = literalExample "pkgs.journalbeat7";
description = ''
The journalbeat package to use
'';
};
name = mkOption {
type = types.str;
default = "journalbeat";
description = "Name of the beat";
};
tags = mkOption {
type = types.listOf types.str;
default = [];
description = "Tags to place on the shipped log messages";
};
stateDir = mkOption {
type = types.str;
default = "journalbeat";
description = ''
Directory below <literal>/var/lib/</literal> to store journalbeat's
own logs and other data. This directory will be created automatically
using systemd's StateDirectory mechanism.
'';
};
extraConfig = mkOption {
type = types.lines;
default = optionalString lt6 ''
journalbeat:
seek_position: cursor
cursor_seek_fallback: tail
write_cursor_state: true
cursor_flush_period: 5s
clean_field_names: true
convert_to_numbers: false
move_metadata_to_field: journal
default_type: journal
'';
description = "Any other configuration options you want to add";
};
};
};
config = mkIf cfg.enable {
assertions = [
{
assertion = !hasPrefix "/" cfg.stateDir;
message =
"The option services.journalbeat.stateDir shouldn't be an absolute directory." +
" It should be a directory relative to /var/lib/.";
}
];
systemd.services.journalbeat = {
description = "Journalbeat log shipper";
wantedBy = [ "multi-user.target" ];
preStart = ''
mkdir -p ${cfg.stateDir}/data
mkdir -p ${cfg.stateDir}/logs
'';
serviceConfig = {
StateDirectory = cfg.stateDir;
ExecStart = ''
${cfg.package}/bin/journalbeat \
-c ${journalbeatYml} \
-path.data /var/lib/${cfg.stateDir}/data \
-path.logs /var/lib/${cfg.stateDir}/logs'';
Restart = "always";
};
};
};
}