78 lines
2.2 KiB
Nix
78 lines
2.2 KiB
Nix
{ config, lib, pkgs, options, ... }:
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let
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cfg = config.services.prometheus.exporters.junos-czerwonk;
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inherit (lib)
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mkOption
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types
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escapeShellArg
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mkIf
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concatStringsSep
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;
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configFile = if cfg.configuration != null then configurationFile else (escapeShellArg cfg.configurationFile);
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configurationFile = pkgs.writeText "prometheus-junos-czerwonk-exporter.conf" (builtins.toJSON (cfg.configuration));
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in
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{
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port = 9326;
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extraOpts = {
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environmentFile = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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File containing env-vars to be substituted into the exporter's config.
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'';
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};
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configurationFile = mkOption {
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type = types.nullOr types.path;
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default = null;
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description = ''
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Specify the JunOS exporter configuration file to use.
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'';
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};
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configuration = mkOption {
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type = types.nullOr types.attrs;
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default = null;
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description = ''
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JunOS exporter configuration as nix attribute set. Mutually exclusive with the `configurationFile` option.
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'';
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example = {
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devices = [
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{
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host = "router1";
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key_file = "/path/to/key";
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}
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];
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};
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};
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telemetryPath = mkOption {
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type = types.str;
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default = "/metrics";
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description = ''
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Path under which to expose metrics.
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'';
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};
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};
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serviceOpts = {
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serviceConfig = {
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DynamicUser = false;
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EnvironmentFile = mkIf (cfg.environmentFile != null) [ cfg.environmentFile ];
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RuntimeDirectory = "prometheus-junos-czerwonk-exporter";
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ExecStartPre = [
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"${pkgs.writeShellScript "subst-secrets-junos-czerwonk-exporter" ''
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umask 0077
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${pkgs.envsubst}/bin/envsubst -i ${configFile} -o ''${RUNTIME_DIRECTORY}/junos-exporter.json
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''}"
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];
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ExecStart = ''
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${pkgs.prometheus-junos-czerwonk-exporter}/bin/junos_exporter \
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-web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
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-web.telemetry-path ${cfg.telemetryPath} \
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-config.file ''${RUNTIME_DIRECTORY}/junos-exporter.json \
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${concatStringsSep " \\\n " cfg.extraFlags}
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'';
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};
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};
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}
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