first commit

Author: dev-scripts

.gitignore

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+node_modules
+logfile.log

README.md

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+version: '3.7'
+services:
+  elasticsearch:
+    image: 'docker.elastic.co/elasticsearch/elasticsearch:8.10.2'
+    container_name: elasticsearch-logging
+    volumes:
+      - 'data_es:/usr/share/elasticsearch/data'
+    environment:
+      - discovery.type=single-node
+      - CLI_JAVA_OPTS=-Xms2g -Xmx2g
+      - bootstrap.memory_lock=true
+      - xpack.security.enabled=false
+      - xpack.security.enrollment.enabled=false
+    ports:
+      - '9300:9200'
+    networks:
+      - elasticsearch-kibana-node-js-logging
+  kibana:
+    image: 'docker.elastic.co/kibana/kibana:8.10.2'
+    container_name: kibina-logging
+    environment:
+      - 'ELASTICSEARCH_HOSTS=http://elasticsearch:9200'
+      - 'XPACK_ENCRYPTEDSAVEDOBJECTS_ENCRYPTIONKEY=d1a66dfd-c4d3-4a0a-8290-2abcb83ab3aa'
+    ports:
+      - '5701:5601'
+    networks:
+      - elasticsearch-kibana-node-js-logging
+  app:
+    build: .
+    container_name: app-logging
+    restart: unless-stopped
+    ports:
+      - '3002:8000'
+    stdin_open: true
+    tty: true
+    networks:
+      - elasticsearch-kibana-node-js-logging
+volumes:
+  data_es:
+    driver: local
+networks:
+  elasticsearch-kibana-node-js-logging: null

docker-compose.yml

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+FROM node:20
+
+WORKDIR /app
+COPY package.json .
+RUN npm install
+COPY . .
+EXPOSE 8000
+CMD npm start

dockerfile

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+var express = require('express');
+var app = express();
+const logger = require('./logger');
+
+app.get('/', function (req, res) {
+  res.send('Hello World.');
+  logger.info('I am infor message');  //logs the info log message
+  logger.error('I am error message'); //logs the error log message
+});
+
+app.listen(8000, function () {
+  console.log('Listening on port 8000!');
+});

index.js

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+const winston = require('winston');
+const { ElasticsearchTransport } = require('winston-elasticsearch');
+
+const esTransportOpts = {
+  level: 'info',
+  index: 'an-index',
+  clientOpts: { 
+    node: 'http://elasticsearch:9200', // Replace with your Elasticsearch node URL or you can place it to the .env file
+
+  },
+  transformer: logData => {
+    return {
+      "@timestamp": (new Date()).getTime(),
+      severity: logData.level,
+      message: `[${logData.level}] LOG Message: ${logData.message}`,
+      fields: {}
+    }
+}
+};
+
+const logger = winston.createLogger({
+  level: 'info',
+  format: winston.format.json(),
+  transports: [
+    new winston.transports.File({ filename: 'logfile.log', level: 'error' }), // Save errors to file
+    new ElasticsearchTransport(esTransportOpts) // Use ElasticsearchTransport instead of Elasticsearch
+  ]
+});
+
+if (process.env.NODE_ENV !== 'production') {
+  logger.add(new winston.transports.Console({ // Log to console if not in production
+    format: winston.format.simple()
+  }));
+}
+
+module.exports = logger;