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