feat: Notify systemd for start, stop, watchdog

lib/controller.ts

@@ -39,6 +39,12 @@ const AllExtensions = [
 type ExtensionArgs = [Zigbee, MQTT, State, PublishEntityState, EventBus,
     (enable: boolean, name: string) => Promise<void>, () => void, (extension: Extension) => Promise<void>];
 
+let sdNotify: any = null;
+try {
+    sdNotify = process.env.NOTIFY_SOCKET ? require('sd-notify') : null;
+} catch {
+}
+
 export class Controller {
     private eventBus: EventBus;
     private zigbee: Zigbee;
@@ -162,6 +168,12 @@ export class Controller {
             (data) => utils.publishLastSeen(data, settings.get(), false, this.publishEntityState));
 
         logger.info(`Zigbee2MQTT started!`);
+
+        const watchdogInterval = sdNotify?.watchdogInterval() || 0;
+        if (watchdogInterval > 0) {
+            sdNotify.startWatchdogMode(Math.floor(watchdogInterval / 2));
+        }
+        sdNotify?.ready();
     }
 
     @bind async enableDisableExtension(enable: boolean, name: string): Promise<void> {
@@ -186,6 +198,8 @@ export class Controller {
     }
 
     async stop(restart = false): Promise<void> {
+        sdNotify?.stopping();
+
         // Call extensions
         await this.callExtensions('stop', this.extensions);
         this.eventBus.removeListeners(this);
@@ -202,6 +216,8 @@ export class Controller {
             logger.error('Failed to stop Zigbee2MQTT');
             await this.exit(1, restart);
         }
+
+        sdNotify?.stopWatchdogMode();
     }
 
     async exit(code: number, restart = false): Promise<void> {

package.json

@@ -111,5 +111,8 @@
   },
   "bin": {
     "zigbee2mqtt": "cli.js"
+  },
+  "optionalDependencies": {
+    "sd-notify": "^2.8.0"
   }
 }

scripts/install.sh

@@ -36,10 +36,12 @@ Description=zigbee2mqtt
 After=network.target
 
 [Service]
-ExecStart=/usr/bin/npm start
+Type=notify
+ExecStart=/usr/bin/node index.js
 WorkingDirectory=/opt/zigbee2mqtt
 StandardOutput=inherit
 StandardError=inherit
+WatchdogSec=10s
 Restart=always
 User=pi
 

test/controller.test.js

@@ -1,3 +1,4 @@
+process.env.NOTIFY_SOCKET = "mocked";
 const data = require('./stub/data');
 const logger = require('./stub/logger');
 const zigbeeHerdsman = require('./stub/zigbeeHerdsman');
@@ -16,6 +17,16 @@ const mocksClear = [
 
 const fs = require('fs');
 
+jest.mock('sd-notify', () => {
+    return {
+        watchdogInterval: () => {return 3000;},
+        startWatchdogMode: (interval) => {},
+        stopWatchdogMode: () => {},
+        ready: () => {},
+        stopping: () => {},
+    };
+}, {virtual: true});
+
 describe('Controller', () => {
     let controller;
     let mockExit;