106 lines
4.0 KiB
Nix
106 lines
4.0 KiB
Nix
{ pkgs, lib, config, ... }:
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let
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cfg = config.services.nixseparatedebuginfod;
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url = "127.0.0.1:${toString cfg.port}";
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in
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{
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options = {
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services.nixseparatedebuginfod = {
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enable = lib.mkEnableOption "separatedebuginfod, a debuginfod server providing source and debuginfo for nix packages";
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port = lib.mkOption {
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description = "port to listen";
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default = 1949;
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type = lib.types.port;
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};
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nixPackage = lib.mkOption {
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type = lib.types.package;
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default = pkgs.nix;
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defaultText = lib.literalExpression "pkgs.nix";
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description = ''
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The version of nix that nixseparatedebuginfod should use as client for the nix daemon. It is strongly advised to use nix version >= 2.18, otherwise some debug info may go missing.
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'';
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};
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allowOldNix = 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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Do not fail evaluation when {option}`services.nixseparatedebuginfod.nixPackage` is older than nix 2.18.
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'';
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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 = cfg.allowOldNix || (lib.versionAtLeast cfg.nixPackage.version "2.18");
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message = "nixseparatedebuginfod works better when `services.nixseparatedebuginfod.nixPackage` is set to nix >= 2.18 (instead of ${cfg.nixPackage.name}). Set `services.nixseparatedebuginfod.allowOldNix` to bypass.";
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} ];
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systemd.services.nixseparatedebuginfod = {
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wantedBy = [ "multi-user.target" ];
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wants = [ "nix-daemon.service" ];
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after = [ "nix-daemon.service" ];
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path = [ cfg.nixPackage ];
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serviceConfig = {
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ExecStart = [ "${pkgs.nixseparatedebuginfod}/bin/nixseparatedebuginfod -l ${url}" ];
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Restart = "on-failure";
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CacheDirectory = "nixseparatedebuginfod";
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# nix does not like DynamicUsers in allowed-users
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User = "nixseparatedebuginfod";
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Group = "nixseparatedebuginfod";
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# hardening
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# Filesystem stuff
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ProtectSystem = "strict"; # Prevent writing to most of /
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ProtectHome = true; # Prevent accessing /home and /root
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PrivateTmp = true; # Give an own directory under /tmp
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PrivateDevices = true; # Deny access to most of /dev
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ProtectKernelTunables = true; # Protect some parts of /sys
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ProtectControlGroups = true; # Remount cgroups read-only
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RestrictSUIDSGID = true; # Prevent creating SETUID/SETGID files
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PrivateMounts = true; # Give an own mount namespace
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RemoveIPC = true;
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UMask = "0077";
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# Capabilities
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CapabilityBoundingSet = ""; # Allow no capabilities at all
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NoNewPrivileges = true; # Disallow getting more capabilities. This is also implied by other options.
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# Kernel stuff
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ProtectKernelModules = true; # Prevent loading of kernel modules
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SystemCallArchitectures = "native"; # Usually no need to disable this
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ProtectKernelLogs = true; # Prevent access to kernel logs
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ProtectClock = true; # Prevent setting the RTC
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# Networking
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RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6";
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# Misc
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LockPersonality = true; # Prevent change of the personality
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ProtectHostname = true; # Give an own UTS namespace
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RestrictRealtime = true; # Prevent switching to RT scheduling
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MemoryDenyWriteExecute = true; # Maybe disable this for interpreters like python
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RestrictNamespaces = true;
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};
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};
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users.users.nixseparatedebuginfod = {
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isSystemUser = true;
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group = "nixseparatedebuginfod";
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};
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users.groups.nixseparatedebuginfod = { };
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nix.settings.extra-allowed-users = [ "nixseparatedebuginfod" ];
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environment.variables.DEBUGINFOD_URLS = "http://${url}";
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environment.systemPackages = [
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# valgrind support requires debuginfod-find on PATH
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(lib.getBin pkgs.elfutils)
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];
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environment.etc."gdb/gdbinit.d/nixseparatedebuginfod.gdb".text = "set debuginfod enabled on";
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};
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}
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