100 lines
2.9 KiB
Nix
100 lines
2.9 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.litestream;
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settingsFormat = pkgs.formats.yaml {};
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in
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{
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options.services.litestream = {
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enable = mkEnableOption "litestream";
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package = mkOption {
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description = "Package to use.";
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default = pkgs.litestream;
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defaultText = literalExpression "pkgs.litestream";
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type = types.package;
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};
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settings = mkOption {
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description = ''
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See the <link xlink:href="https://litestream.io/reference/config/">documentation</link>.
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'';
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type = settingsFormat.type;
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example = {
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dbs = [
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{
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path = "/var/lib/db1";
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replicas = [
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{
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url = "s3://mybkt.litestream.io/db1";
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}
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];
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}
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];
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};
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};
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environmentFile = mkOption {
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type = types.nullOr types.path;
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default = null;
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example = "/run/secrets/litestream";
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description = ''
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Environment file as defined in <citerefentry>
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<refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum>
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</citerefentry>.
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Secrets may be passed to the service without adding them to the
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world-readable Nix store, by specifying placeholder variables as
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the option value in Nix and setting these variables accordingly in the
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environment file.
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By default, Litestream will perform environment variable expansion
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within the config file before reading it. Any references to ''$VAR or
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''${VAR} formatted variables will be replaced with their environment
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variable values. If no value is set then it will be replaced with an
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empty string.
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<programlisting>
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# Content of the environment file
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LITESTREAM_ACCESS_KEY_ID=AKIAxxxxxxxxxxxxxxxx
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LITESTREAM_SECRET_ACCESS_KEY=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/xxxxxxxxx
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</programlisting>
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Note that this file needs to be available on the host on which
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this exporter is running.
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'';
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};
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};
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config = mkIf cfg.enable {
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environment.systemPackages = [ cfg.package ];
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environment.etc = {
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"litestream.yml" = {
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source = settingsFormat.generate "litestream-config.yaml" cfg.settings;
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};
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};
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systemd.services.litestream = {
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description = "Litestream";
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wantedBy = [ "multi-user.target" ];
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after = [ "networking.target" ];
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serviceConfig = {
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EnvironmentFile = mkIf (cfg.environmentFile != null) cfg.environmentFile;
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ExecStart = "${cfg.package}/bin/litestream replicate";
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Restart = "always";
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User = "litestream";
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Group = "litestream";
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};
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};
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users.users.litestream = {
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description = "Litestream user";
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group = "litestream";
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isSystemUser = true;
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};
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users.groups.litestream = {};
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};
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meta.doc = ./litestream.xml;
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}
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