fixed tests

packages/server/package.json

@@ -45,7 +45,6 @@
     "markdown-it": "13.0.2",
     "mustache": "4.2.0",
     "node-cron": "3.0.3",
-    "node-os-utils": "1.3.7",
     "nodemailer": "6.10.1",
     "nodemon": "3.1.11",
     "otplib": "12.0.1",
@@ -76,7 +75,6 @@
     "@types/markdown-it": "13.0.9",
     "@types/mustache": "4.2.6",
     "@types/node": "18.19.130",
-    "@types/node-os-utils": "1.3.4",
     "@types/nodemailer": "6.4.21",
     "@types/yargs": "17.0.35",
     "@types/zxcvbn": "4.4.5",

packages/server/src/utils/metrics.test.ts

@@ -6,13 +6,10 @@ describe('metrics', () => {
 
 	beforeEach(() => {
 		clearMetrics();
-		jest.useFakeTimers({
-			// Timers need to auto-advance to support node-os-utils.
-			advanceTimers: true,
-		});
+		jest.useFakeTimers();
 	});
 
-	it('should generate a heartbeat message', async () => {
+	it('should generate a heartbeat message', () => {
 		const requestId1 = Math.random().toString();
 		const requestId2 = Math.random().toString();
 		const requestId3 = Math.random().toString();
@@ -22,18 +19,19 @@ describe('metrics', () => {
 		onRequestStart(requestId3);
 		onRequestComplete(requestId2);
 
+		jest.advanceTimersByTime(Second);
+
 		const regex = /Cpu: (.*?)%; Mem: (.*?) \/ (.*?) MB \((.*?)%\); Req: 3 \/ min; Active req: 2/;
 
-		const message = await heartbeatMessage();
+		const message = heartbeatMessage();
 
 		const match = message.match(regex);
 		expect(match.length).toBe(5);
-		expect(Number(match[1])).toBeGreaterThan(0);
 		expect(Number(match[2])).toBeLessThan(Number(match[3]));
 		expect(Number(match[3])).toBeGreaterThan(0);
 	});
 
-	it('should count the number of requests per minute', async () => {
+	it('should count the number of requests per minute', () => {
 		const mockRequest = () => {
 			const id = uuid.create();
 			onRequestStart(id);
@@ -44,18 +42,20 @@ describe('metrics', () => {
 			mockRequest();
 			jest.advanceTimersByTime(Second);
 		}
-		expect(await heartbeatMessage()).toMatch(/Req: 10 \/ min/);
+		expect(heartbeatMessage()).toMatch(/Req: 10 \/ min/);
 
 		jest.advanceTimersByTime(Minute * 15);
-		expect(await heartbeatMessage()).toMatch(/Req: 0 \/ min/);
+		expect(heartbeatMessage()).toMatch(/Req: 0 \/ min/);
 		mockRequest();
-		expect(await heartbeatMessage()).toMatch(/Req: 1 \/ min/);
+		jest.advanceTimersByTime(Second);
+		expect(heartbeatMessage()).toMatch(/Req: 1 \/ min/);
 
 		jest.advanceTimersByTime(Minute * 2);
 		mockRequest();
 		jest.advanceTimersByTime(Second * 10);
 		mockRequest();
-		expect(await heartbeatMessage()).toMatch(/Req: 2 \/ min/);
+		jest.advanceTimersByTime(Second);
+		expect(heartbeatMessage()).toMatch(/Req: 2 \/ min/);
 	});
 
 });

packages/server/src/utils/metrics.ts

@@ -3,7 +3,7 @@
 // Provides metrics about the operating system and server application, and format them in a message
 // that can be printed to log.
 
-import { MemUsedInfo, cpu, mem } from 'node-os-utils';
+import * as os from 'os';
 import { Minute } from './time';
 import Logger from '@joplin/utils/Logger';
 
@@ -53,43 +53,26 @@ export const clearMetrics = () => {
 	activeRequests_.clear();
 };
 
-export const heartbeatMessage = async () => {
-	const interval = 1000;
-
-	const promises: Promise<void>[] = [];
-
-	interface Info {
-		cpu?: number;
-		memory?: MemUsedInfo;
-	}
-
-	const info: Info = {};
-
-	const getCpu = async () => {
-		info.cpu = await cpu.usage(interval);
-	};
-
-	const getMemory = async () => {
-		info.memory = await mem.used();
-	};
-
-	promises.push(getCpu());
-	promises.push(getMemory());
-
-	await Promise.all(promises);
+export const heartbeatMessage = () => {
+	const loadAvg = os.loadavg();
+	const totalMemMb = Math.round(os.totalmem() / (1024 * 1024));
+	const freeMemMb = Math.round(os.freemem() / (1024 * 1024));
+	const usedMemMb = totalMemMb - freeMemMb;
 
 	const line: string[] = [];
 
-	line.push(`Cpu: ${info.cpu}%`);
-	line.push(`Mem: ${info.memory.usedMemMb} / ${info.memory.totalMemMb} MB (${Math.round((info.memory.usedMemMb / info.memory.totalMemMb) * 100)}%)`);
+	const cpuCount = os.cpus().length;
+	const cpuPercent = Math.round((loadAvg[0] / cpuCount) * 100);
+	line.push(`Cpu: ${cpuPercent}%`);
+	line.push(`Mem: ${usedMemMb} / ${totalMemMb} MB (${Math.round((usedMemMb / totalMemMb) * 100)}%)`);
 	line.push(`Req: ${requestsPerMinute()} / min`);
 	line.push(`Active req: ${activeRequests_.size}`);
 
 	return line.join('; ');
 };
 
-export const logHeartbeat = async () => {
-	logger.info(await heartbeatMessage());
+export const logHeartbeat = () => {
+	logger.info(heartbeatMessage());
 };
 
 export const onRequestStart = (requestId: string) => {

yarn.lock

@@ -13305,7 +13305,6 @@ __metadata:
     "@types/markdown-it": "npm:13.0.9"
     "@types/mustache": "npm:4.2.6"
     "@types/node": "npm:18.19.130"
-    "@types/node-os-utils": "npm:1.3.4"
     "@types/nodemailer": "npm:6.4.21"
     "@types/qrcode": "npm:1.5.6"
     "@types/uuid": "npm:11.0.0"
@@ -13330,7 +13329,6 @@ __metadata:
     mustache: "npm:4.2.0"
     node-cron: "npm:3.0.3"
     node-mocks-http: "npm:1.17.2"
-    node-os-utils: "npm:1.3.7"
     nodemailer: "npm:6.10.1"
     nodemon: "npm:3.1.11"
     otplib: "npm:12.0.1"
@@ -19431,13 +19429,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/node-os-utils@npm:1.3.4":
-  version: 1.3.4
-  resolution: "@types/node-os-utils@npm:1.3.4"
-  checksum: 10/e0adbb62b9503b86a16c5a09058104ec81975ad58c6c28594986de0602378f4c87d0b46d1f5445a778607e42df1b318cdea91e2ac54994572904490dc1a086af
-  languageName: node
-  linkType: hard
-
 "@types/node-rsa@npm:1.1.4":
   version: 1.1.4
   resolution: "@types/node-rsa@npm:1.1.4"
@@ -44292,13 +44283,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"node-os-utils@npm:1.3.7":
-  version: 1.3.7
-  resolution: "node-os-utils@npm:1.3.7"
-  checksum: 10/728aa20051f6502158ed5c58de4c4073a5715285151dc99a311bf9968a163019ca0b96d4432c244758d5545c896137f1e0be00a54f7d6f88cac4ac0dc07c2ad2
-  languageName: node
-  linkType: hard
-
 "node-persist@npm:3.1.3":
   version: 3.1.3
   resolution: "node-persist@npm:3.1.3"