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|
{ config
, lib
, pkgs
, options
, ...
}:
let
inherit (lib)
escapeShellArgs
mkOption
optionals
types
;
cfg = config.services.prometheus.exporters.fastly;
in
{
port = 9118;
extraOpts = with types; {
configFile = mkOption {
type = nullOr path;
default = null;
example = "./fastly-exporter-config.txt";
description = ''
Path to a fastly-exporter configuration file.
Example one can be generated with `fastly-exporter --config-file-example`.
'';
};
tokenPath = mkOption {
type = path;
description = ''
A run-time path to the token file, which is supposed to be provisioned
outside of Nix store.
'';
};
};
serviceOpts = {
serviceConfig = {
LoadCredential = "fastly-api-token:${cfg.tokenPath}";
};
script = let
call = escapeShellArgs ([
"${pkgs.prometheus-fastly-exporter}/bin/fastly-exporter"
"-listen" "${cfg.listenAddress}:${toString cfg.port}"
] ++ optionals (cfg.configFile != null) [
"--config-file" cfg.configFile
] ++ cfg.extraFlags);
in ''
export FASTLY_API_TOKEN="$(cat $CREDENTIALS_DIRECTORY/fastly-api-token)"
${call}
'';
};
}
|