Added Nginx, Node and Redis project

Signed-off-by: ajeetraina <ajeetraina@gmail.com>

nginx-nodejs-redis/docker-compose.yml

@@ -0,0 +1,25 @@
+version: '3.9'
+services:
+  redis:
+    image: 'redis:alpine'
+    ports:
+      - '6379:6379'
+  web1:
+    restart: on-failure
+    build: ./web1
+    ports:
+      - '81:5000'
+  web2:
+    restart: on-failure
+    build: ./web2
+    ports:
+      - '82:5000'
+  nginx:
+    build: ./nginx
+    ports:
+    - '80:80'
+    depends_on:
+    - web1
+    - web2
+
+

nginx-nodejs-redis/nginx/Dockerfile

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+FROM nginx
+RUN rm /etc/nginx/conf.d/default.conf
+COPY nginx.conf /etc/nginx/conf.d/default.conf

nginx-nodejs-redis/nginx/nginx.conf

@@ -0,0 +1,12 @@
+upstream loadbalancer {
+  server web1:5000;
+  server web2:5000;
+}
+
+server {
+  listen 80;
+  server_name localhost;
+  location / {
+    proxy_pass http://loadbalancer;
+  }
+}

nginx-nodejs-redis/web/Dockerfile

@@ -0,0 +1,9 @@
+FROM node:alpine
+
+WORKDIR /usr/src/app
+
+COPY ./package.json ./
+RUN npm install
+COPY ./server.js ./
+
+CMD ["npm","start"]

nginx-nodejs-redis/web/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "web",
+  "version": "1.0.0",
+  "description": "Running Node.js and Express.js on Docker",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "express": "^4.17.2",
+    "redis": "3.1.2"
+  },
+  "author": "",
+  "license": "MIT"
+}

nginx-nodejs-redis/web/server.js

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+const express = require('express');
+const redis = require('redis');
+const app = express();
+const redisClient = redis.createClient({
+  host: 'redis',
+  port: 6379
+});
+
+app.get('/', function(req, res) {
+    redisClient.get('numVisits', function(err, numVisits) {
+        numVisitsToDisplay = parseInt(numVisits) + 1;
+        if (isNaN(numVisitsToDisplay)) {
+            numVisitsToDisplay = 1;
+        }
+        res.send('Number of visits is: ' + numVisitsToDisplay);
+        numVisits++;
+        redisClient.set('numVisits', numVisits);
+    });
+});
+
+app.listen(5000, function() {
+    console.log('Web application is listening on port 5000');
+});

nginx-nodejs-redis/web1/Dockerfile

@@ -0,0 +1,9 @@
+FROM node:alpine
+
+WORKDIR /usr/src/app
+
+COPY ./package*.json ./
+RUN npm install
+COPY ./server.js ./
+
+CMD ["npm","start"]

nginx-nodejs-redis/web1/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "web1",
+  "version": "1.0.0",
+  "description": "Running Node.js and Express.js on Docker",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "express": "^4.17.2",
+    "redis": "3.1.2"
+  },
+  "author": "",
+  "license": "MIT"
+}

nginx-nodejs-redis/web1/server.js

@@ -0,0 +1,24 @@
+const express = require('express');
+const redis = require('redis');
+const app = express();
+const redisClient = redis.createClient({
+  host: 'redis',
+  port: 6379
+});
+
+
+app.get('/', function(req, res) {
+    redisClient.get('numVisits', function(err, numVisits) {
+        numVisitsToDisplay = parseInt(numVisits) + 1;
+        if (isNaN(numVisitsToDisplay)) {
+            numVisitsToDisplay = 1;
+        }
+        res.send('web1: Total number of visits is: ' + numVisitsToDisplay);
+        numVisits++;
+        redisClient.set('numVisits', numVisits);
+    });
+});
+
+app.listen(5000, function() {
+    console.log('Web app is listening on port 5000');
+});

nginx-nodejs-redis/web2/Dockerfile

@@ -0,0 +1,9 @@
+FROM node:alpine
+
+WORKDIR /usr/src/app
+
+COPY ./package.json ./
+RUN npm install
+COPY ./server.js ./
+
+CMD ["npm","start"]

nginx-nodejs-redis/web2/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "web2",
+  "version": "1.0.0",
+  "description": "Running Node.js and Express.js on Docker",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "express": "^4.17.2",
+    "redis": "3.1.2"
+  },
+  "author": "",
+  "license": "MIT"
+}

nginx-nodejs-redis/web2/server.js

@@ -0,0 +1,24 @@
+const express = require('express');
+const redis = require('redis');
+const app = express();
+const redisClient = redis.createClient({
+  host: 'redis',
+  port: 6379
+});
+
+
+app.get('/', function(req, res) {
+    redisClient.get('numVisits', function(err, numVisits) {
+        numVisitsToDisplay = parseInt(numVisits) + 1;
+        if (isNaN(numVisitsToDisplay)) {
+            numVisitsToDisplay = 1;
+        }
+        res.send('web2: Total number of visits is: ' + numVisitsToDisplay);
+        numVisits++;
+        redisClient.set('numVisits', numVisits);
+    });
+});
+
+app.listen(5000, function() {
+    console.log('Web app is listening on port 5000');
+});