Add & improve prometheus features on javascript & typescript backends

Author: ganatan

backend-javascript/.env.development

@@ -40,10 +40,16 @@ DB_MYSQL_PASSWORD=Trustno1
 
 # === ELASTICSEARCH ===
 LOGSTASH_ENABLED=false
-ELASTIC_ENABLED=true
+ELASTIC_ENABLED=false
 ELASTICSEARCH_NODE=http://localhost:9200
 
 # === REDIS ===
 REDIS_ENABLED=false
 REDIS_REQUIRED=false
-REDIS_URL=redis://localhost:6379
+REDIS_URL=redis://localhost:6379
+
+# === PROMETHEUS ===
+PROMETHEUS_ENABLED=true
+# PROMETHEUS_MODE=http_requests_total
+PROMETHEUS_MODE=all
+

backend-javascript/.env.production

@@ -40,10 +40,14 @@ DB_MYSQL_PASSWORD=Trustno1
 
 # === ELASTICSEARCH ===
 LOGSTASH_ENABLED=false
-ELASTIC_ENABLED=true
+ELASTIC_ENABLED=false
 ELASTICSEARCH_NODE=http://localhost:9200
 
 # === REDIS ===
 REDIS_ENABLED=false
 REDIS_REQUIRED=false
-REDIS_URL=redis://localhost:6379
+REDIS_URL=redis://localhost:6379
+
+# === PROMETHEUS ===
+PROMETHEUS_ENABLED=true
+PROMETHEUS_MODE=http_requests_total

backend-javascript/.env.test

@@ -39,10 +39,14 @@ DB_MYSQL_PASSWORD=Trustno1
 
 # === ELASTICSEARCH ===
 LOGSTASH_ENABLED=false
-ELASTIC_ENABLED=true
+ELASTIC_ENABLED=false
 ELASTICSEARCH_NODE=http://localhost:9200
 
 # === REDIS ===
 REDIS_ENABLED=false
 REDIS_REQUIRED=false
-REDIS_URL=redis://localhost:6379
+REDIS_URL=redis://localhost:6379
+
+# === PROMETHEUS ===
+PROMETHEUS_ENABLED=true
+PROMETHEUS_MODE=http_requests_total

backend-javascript/docker/docker-compose.prometheus.yml

@@ -0,0 +1,14 @@
+
+services:
+  prometheus:
+    image: prom/prometheus
+    container_name: prometheus
+    volumes:
+      - prometheus_data:/prometheus
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml
+    ports:
+      - "9090:9090"
+
+volumes:
+  prometheus_data:
+

backend-javascript/docker/prometheus.yml

@@ -0,0 +1,15 @@
+global:
+  scrape_interval: 25s
+
+scrape_configs:
+  - job_name: 'backend-javascript'
+    metrics_path: '/metrics'
+    static_configs:
+      - targets:
+          - host.docker.internal:3001
+
+  - job_name: 'backend-typescript'
+    metrics_path: '/metrics'
+    static_configs:
+      - targets:
+          - host.docker.internal:3002

backend-javascript/package.json

@@ -54,7 +54,9 @@
     "compose:rebuild-force": "docker-compose down && docker-compose up -d --build --force-recreate",
     "compose:monitoring": "docker compose -f docker/docker-compose.monitoring.yml up -d",
     "compose:monitoring:clean": "docker compose -f docker/docker-compose.monitoring.yml down --volumes --rmi all",
-    "compose:logstash": "docker compose -f docker/docker-compose.logstash.yml up -d"
+    "compose:logstash": "docker compose -f docker/docker-compose.logstash.yml up -d",
+    "compose:prometheus": "docker compose -f docker/docker-compose.prometheus.yml up -d",
+    "compose:prometheus:clean": "docker compose -f docker/docker-compose.prometheus.yml down --volumes --rmi all"
   },
   "keywords": [
     "nodejs",

backend-javascript/prometheus.yml

@@ -3,27 +3,23 @@ import compression from 'compression';
 
 import appConfig from './config/app.config.js';
 
-import logger from './infrastructure/logger/logger.js';
-
-import configureSecurity from './middlewares/security/security.js';
-
 import initLocals from './middlewares/core/init-locals.js';
+import configureSecurity from './middlewares/security/security.js';
+import fakeAuth from './middlewares/auth/fake-auth.js';
+import correlationIdMiddleware from './middlewares/core/correlation-id.js';
 
-// import redisClient from './core/cache/redis.client.js';
+import requestLogger from './infrastructure/logger/request-logger.js';
 
 import notFoundHandler from './middlewares/error/not-found-handler.js';
 import responseHandler from './middlewares/response/response-handler.js';
 import errorHandler from './middlewares/error/error-handler.js';
 
-import correlationIdMiddleware from './middlewares/core/correlation-id.js';
-import requestLogger from './infrastructure/logger/request-logger.js';
-
-import fakeAuth from './middlewares/auth/fake-auth.js';
-
-import metricsRoutes from './routes/metrics.routes.js';
 import healthRoutes from './routes/health.routes.js';
+import testRoutes from './routes/test.routes.js';
+import metricsRoutes from './routes/metrics.routes.js';
 import versionRoutes from './routes/version.routes.js';
 import swaggerRoutes from './routes/swagger.routes.js';
+
 import appRoutes from './routes/app.routes.js';
 import rootRoutes from './routes/root.routes.js';
 
@@ -43,30 +39,12 @@ if (['development', 'test'].includes(appConfig.app.nodeEnv)) {
 app.use(correlationIdMiddleware);
 app.use(requestLogger);
 
-app.get('/test-elk', (req, res) => {
-  logger.info('Test ELK réussi : requête GET /test', { route: '/test' });
-  console.log('Requête /test : log envoyé vers ELK');
-  res.send('Log envoyé vers ElasticSearch');
-});
-
-// app.get('/test-redis', async (req, res, next) => {
-//   try {
-//     await redisClient.set('test-redis', 'Redis is working!');
-//     const value = await redisClient.get('test-redis');
-
-//     console.log('Requête /test-redis : valeur dans Redis =', value);
-
-//     res.send(`Redis test : ${value}`);
-//   } catch (error) {
-//     next(error);
-//   }
-// });
-
-app.use(metricsRoutes);
 app.use(healthRoutes);
-
+app.use(testRoutes);
+app.use(metricsRoutes);
 app.use(versionRoutes);
 app.use(swaggerRoutes);
+
 app.use(appRoutes);
 app.use(rootRoutes);
 

backend-javascript/src/app.js

@@ -4,7 +4,7 @@ import { incrementHttpRequests } from '../metrics/metrics.js';
 
 const requestLogger = (req, res, next) => {
   const startTime = Date.now();
-
+  console.log('00000000001:request-logger');
   res.on('finish', () => {
     incrementHttpRequests(req.method, req.originalUrl, res.statusCode);
 

backend-javascript/src/infrastructure/logger/request-logger.js

@@ -1,15 +1,29 @@
 import client from 'prom-client';
 
-client.collectDefaultMetrics();
+const PROMETHEUS_ENABLED = process.env.PROMETHEUS_ENABLED === 'true';
 
-const httpRequestCounter = new client.Counter({
-  name: 'http_requests_total',
-  help: 'Nombre total de requêtes HTTP',
-  labelNames: ['method', 'route', 'status'],
-});
+if (PROMETHEUS_ENABLED) {
+  client.collectDefaultMetrics();
+}
+
+let httpRequestCounter = null;
+
+if (PROMETHEUS_ENABLED) {
+  httpRequestCounter = new client.Counter({
+    name: 'http_requests_total',
+    help: 'Nombre total de requêtes HTTP',
+    labelNames: ['method', 'route', 'status'],
+  });
+}
 
 function incrementHttpRequests(method, route, status) {
-  httpRequestCounter.inc({ method, route, status });
+  if (httpRequestCounter) {
+    httpRequestCounter.inc({
+      method: method,
+      route: route,
+      status: String(status),
+    });
+  }
 }
 
 export { client, incrementHttpRequests };