101 lines
		
	
	
		
			3.2 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			101 lines
		
	
	
		
			3.2 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
{ config, lib, pkgs, utils, ... }:
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with lib;
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let
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  name = "Ubiquiti mFi Controller";
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  cfg = config.services.mfi;
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  stateDir = "/var/lib/mfi";
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  # XXX 2 runtime exceptions using jre8: JSPException on GET / ; can't initialize ./data/keystore on first run.
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  cmd = "@${pkgs.jre7}/bin/java java -jar ${stateDir}/lib/ace.jar";
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  mountPoints = [
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    { what = "${pkgs.mfi}/dl"; where = "${stateDir}/dl"; }
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    { what = "${pkgs.mfi}/lib"; where = "${stateDir}/lib"; }
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    { what = "${pkgs.mongodb248}/bin"; where = "${stateDir}/bin"; }
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    { what = "${cfg.dataDir}"; where = "${stateDir}/data"; }
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  ];
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  systemdMountPoints = map (m: "${utils.escapeSystemdPath m.where}.mount") mountPoints;
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  ports = [ 6080 6880 6443 6843 ];
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in
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{
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  options = {
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    services.mfi = {
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      enable = mkEnableOption name;
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      openPorts = mkOption {
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        type = types.bool;
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        default = true;
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        description = "Whether to open TCP ports ${concatMapStrings (a: "${toString a} ") ports}for the services.";
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      };
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      dataDir = mkOption {
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        type = types.str;
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        default = "${stateDir}/data";
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        description = ''
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          Where to store the database and other data.
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          This directory will be bind-mounted to ${stateDir}/data as part of the service startup.
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        '';
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      };
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    };
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  };
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  config = mkIf cfg.enable {
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    networking.firewall.allowedTCPPorts = mkIf config.services.mfi.openPorts ports;
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    users.users.mfi = {
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      uid = config.ids.uids.mfi;
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      description = "mFi controller daemon user";
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      home = "${stateDir}";
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    };
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    # We must create the binary directories as bind mounts instead of symlinks
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    # This is because the controller resolves all symlinks to absolute paths
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    # to be used as the working directory.
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    systemd.mounts = map ({ what, where }: {
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        bindsTo = [ "mfi.service" ];
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        partOf = [ "mfi.service" ];
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        unitConfig.RequiresMountsFor = stateDir;
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        options = "bind";
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        what = what;
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        where = where;
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      }) mountPoints;
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    systemd.services.mfi = {
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      description = "mFi controller daemon";
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      wantedBy = [ "multi-user.target" ];
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      after = [ "network.target" ] ++ systemdMountPoints;
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      partOf = systemdMountPoints;
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      bindsTo = systemdMountPoints;
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      unitConfig.RequiresMountsFor = stateDir;
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      preStart = ''
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        # Clear ./webapps each run.
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        rm -rf                               "${stateDir}/webapps"
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        mkdir -p                             "${stateDir}/webapps"
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        ln -s "${pkgs.mfi}/webapps/ROOT.war" "${stateDir}/webapps"
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        # Copy initial config only once.
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        test -e "${stateDir}/conf" || cp -ar "${pkgs.mfi}/conf" "${stateDir}/conf"
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        test -e "${stateDir}/data" || cp -ar "${pkgs.mfi}/data" "${stateDir}/data"
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        # Fix Permissions.
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        # (Bind-mounts cause errors; ignore exit codes)
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        chown -fR mfi:      "${stateDir}" || true
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        chmod -fR u=rwX,go= "${stateDir}" || true
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      '';
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      postStop = ''
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        rm -rf "${stateDir}/webapps"
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      '';
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      serviceConfig = {
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        Type = "simple";
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        ExecStart = "${cmd} start";
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        ExecStop = "${cmd} stop";
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        User = "mfi";
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        PermissionsStartOnly = true;
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        UMask = "0077";
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        WorkingDirectory = "${stateDir}";
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      };
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    };
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  };
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}
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