108 lines
		
	
	
		
			2.8 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			108 lines
		
	
	
		
			2.8 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
{ config, lib, pkgs, ... }:
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with lib;
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let
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  cfg = config.services.restic.server;
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in
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{
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  meta.maintainers = [ maintainers.bachp ];
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  options.services.restic.server = {
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    enable = mkEnableOption "Restic REST Server";
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    listenAddress = mkOption {
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      default = ":8000";
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      example = "127.0.0.1:8080";
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      type = types.str;
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      description = "Listen on a specific IP address and port.";
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    };
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    dataDir = mkOption {
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      default = "/var/lib/restic";
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      type = types.path;
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      description = "The directory for storing the restic repository.";
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    };
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    appendOnly = mkOption {
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      default = false;
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      type = types.bool;
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      description = ''
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        Enable append only mode.
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        This mode allows creation of new backups but prevents deletion and modification of existing backups.
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        This can be useful when backing up systems that have a potential of being hacked.
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      '';
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    };
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    privateRepos = mkOption {
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      default = false;
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      type = types.bool;
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      description = ''
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        Enable private repos.
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        Grants access only when a subdirectory with the same name as the user is specified in the repository URL.
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      '';
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    };
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    prometheus = mkOption {
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      default = false;
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      type = types.bool;
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      description = "Enable Prometheus metrics at /metrics.";
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    };
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    extraFlags = mkOption {
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      type = types.listOf types.str;
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      default = [];
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      description = ''
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        Extra commandline options to pass to Restic REST server.
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      '';
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    };
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    package = mkOption {
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      default = pkgs.restic-rest-server;
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      defaultText = "pkgs.restic-rest-server";
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      type = types.package;
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      description = "Restic REST server package to use.";
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    };
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  };
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  config = mkIf cfg.enable {
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    systemd.services.restic-rest-server = {
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      description = "Restic REST Server";
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      after = [ "network.target" ];
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      wantedBy = [ "multi-user.target" ];
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      serviceConfig = {
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        ExecStart = ''
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          ${cfg.package}/bin/rest-server \
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          --listen ${cfg.listenAddress} \
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          --path ${cfg.dataDir} \
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          ${optionalString cfg.appendOnly "--append-only"} \
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          ${optionalString cfg.privateRepos "--private-repos"} \
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          ${optionalString cfg.prometheus "--prometheus"} \
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          ${escapeShellArgs cfg.extraFlags} \
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        '';
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        Type = "simple";
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        User = "restic";
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        Group = "restic";
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        # Security hardening
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        ReadWritePaths = [ cfg.dataDir ];
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        PrivateTmp = true;
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        ProtectSystem = "strict";
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        ProtectKernelTunables = true;
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        ProtectKernelModules = true;
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        ProtectControlGroups = true;
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        PrivateDevices = true;
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      };
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    };
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    users.users.restic = {
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      group = "restic";
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      home = cfg.dataDir;
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      createHome = true;
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      uid = config.ids.uids.restic;
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    };
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    users.groups.restic.gid = config.ids.uids.restic;
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  };
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}
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