115 lines
3.5 KiB
Nix
115 lines
3.5 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.services.eris-server;
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stateDirectoryPath = "\${STATE_DIRECTORY}";
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nullOrStr = with lib.types; nullOr str;
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in {
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options.services.eris-server = {
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enable = lib.mkEnableOption "an ERIS server";
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package = lib.mkOption {
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type = lib.types.package;
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default = pkgs.eris-go;
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defaultText = lib.literalExpression "pkgs.eris-go";
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description = "Package to use for the ERIS server.";
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};
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decode = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Whether the HTTP service (when enabled) will decode ERIS content at /uri-res/N2R?urn:eris:.
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Enabling this is recommended only for private or local-only servers.
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'';
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};
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listenCoap = lib.mkOption {
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type = nullOrStr;
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default = ":5683";
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example = "[::1]:5683";
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description = ''
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Server CoAP listen address. Listen on all IP addresses at port 5683 by default.
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Please note that the server can service client requests for ERIS-blocks by
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querying other clients connected to the server. Whether or not blocks are
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relayed back to the server depends on client configuration but be aware this
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may leak sensitive metadata and trigger network activity.
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'';
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};
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listenHttp = lib.mkOption {
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type = nullOrStr;
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default = null;
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example = "[::1]:8080";
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description = "Server HTTP listen address. Do not listen by default.";
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};
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backends = lib.mkOption {
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type = with lib.types; listOf str;
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description = ''
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List of backend URLs.
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Add "get" and "put" as query elements to enable those operations.
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'';
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example = [
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"badger+file:///var/db/eris.badger?get&put"
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"coap+tcp://eris.example.com:5683?get"
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];
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};
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mountpoint = lib.mkOption {
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type = nullOrStr;
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default = null;
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example = "/eris";
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description = ''
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Mountpoint for FUSE namespace that exposes "urn:eris:…" files.
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'';
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};
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};
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config = lib.mkIf cfg.enable {
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assertions = [{
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assertion = lib.strings.versionAtLeast cfg.package.version "20231219";
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message =
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"Version of `config.services.eris-server.package` is incompatible with this module";
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}];
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systemd.services.eris-server = let
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cmd = "${cfg.package}/bin/eris-go server"
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+ (lib.optionalString (cfg.listenCoap != null)
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" --coap '${cfg.listenCoap}'")
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+ (lib.optionalString (cfg.listenHttp != null)
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" --http '${cfg.listenHttp}'")
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+ (lib.optionalString cfg.decode " --decode")
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+ (lib.optionalString (cfg.mountpoint != null)
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" --mountpoint '${cfg.mountpoint}'");
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in {
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description = "ERIS block server";
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after = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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environment.ERIS_STORE_URL = toString cfg.backends;
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script = lib.mkIf (cfg.mountpoint != null) ''
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export PATH=${config.security.wrapperDir}:$PATH
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${cmd}
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'';
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serviceConfig = let
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umounter = lib.mkIf (cfg.mountpoint != null)
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"-${config.security.wrapperDir}/fusermount -uz ${cfg.mountpoint}";
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in if (cfg.mountpoint == null) then {
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ExecStart = cmd;
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} else
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{
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ExecStartPre = umounter;
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ExecStopPost = umounter;
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} // {
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Restart = "always";
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RestartSec = 20;
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AmbientCapabilities = "CAP_NET_BIND_SERVICE";
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};
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};
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};
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meta.maintainers = with lib.maintainers; [ ehmry ];
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}
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