Nginx/Node/Redis and Flask/Redis Compose example

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

flask-redis/README.md

@@ -35,15 +35,6 @@ services:
 
 ```
 $ docker-compose up -d
-Creating network "flask-redis_default" with the default driver
-Pulling redis (redislabs/redismod:)...
-...
-...
-web_1    |    WARNING: This is a development server. Do not use it in a production deployment.
-web_1    |  * Running on http://172.19.0.3:5000/ (Press CTRL+C to quit)
-web_1    |  * Restarting with stat
-web_1    |  * Debugger is active!
-web_1    |  * Debugger PIN: 598-320-965
 ```
 
 ## Expected result

nginx-nodejs-redis/README.md

@@ -5,26 +5,20 @@
 Project structure:
 ```
 .
+├── README.md
 ├── docker-compose.yml
 ├── nginx
 │   ├── Dockerfile
 │   └── nginx.conf
-├── web
-│   ├── Dockerfile
-│   ├── package.json
-│   └── server.js
-├── web1
-│   ├── Dockerfile
-│   ├── package.json
-│   └── server.js
-└── web2
+└── web
     ├── Dockerfile
     ├── package.json
     └── server.js
 
-4 directories, 12 files
-```
+2 directories, 7 files
 
+
+```
 [_docker-compose.yml_](docker-compose.yml)
 ```
 redis:
@@ -60,10 +54,6 @@ When deploying the application, docker-compose maps port 80 of the nginx service
 
 ```
 $ docker-compose up -d
-Creating nginx-nodejs-redis_redis_1 ... done
-Creating nginx-nodejs-redis_web1_1  ... done
-Creating nginx-nodejs-redis_web2_1  ... done
-Creating nginx-nodejs-redis_nginx_1 ... done
 ```
 
 
@@ -74,16 +64,6 @@ Listing containers must show three containers running and the port mapping as be
 
 ```
 docker-compose ps
-           Name                        Command              State           Ports         
-------------------------------------------------------------------------------------------
-nginx-nodejs-redis_nginx_1   /docker-entrypoint.sh ngin     Up      0.0.0.0:80->80/tcp    
-                             ...                                                          
-nginx-nodejs-redis_redis_1   docker-entrypoint.sh redis     Up      0.0.0.0:6379->6379/tcp
-                             ...                                                          
-nginx-nodejs-redis_web1_1    docker-entrypoint.sh npm       Up      0.0.0.0:81->5000/tcp  
-                             start                                                        
-nginx-nodejs-redis_web2_1    docker-entrypoint.sh npm       Up      0.0.0.0:82->5000/tcp  
-                             start   
 ```
 
 ## Testing the app
@@ -105,10 +85,6 @@ $ curl localhost:80
 web2: Total number of visits is: 3
 ```
 
-```
-$ curl localhost:80
-web2: Total number of visits is: 4
-``` 
 
 
 ## Stop and remove the containers

nginx-nodejs-redis/docker-compose.yml

@@ -6,12 +6,14 @@ services:
       - '6379:6379'
   web1:
     restart: on-failure
-    build: ./web1
+    build: ./web
+    hostname: web1
     ports:
       - '81:5000'
   web2:
     restart: on-failure
-    build: ./web2
+    build: ./web
+    hostname: web2
     ports:
       - '82:5000'
   nginx:

nginx-nodejs-redis/web/server.js

@@ -1,5 +1,4 @@
-const express = require('express');
-const redis = require('redis');
+const os = require('os');
 const app = express();
 const redisClient = redis.createClient({
   host: 'redis',

nginx-nodejs-redis/web1/Dockerfile

@@ -1,9 +0,0 @@
-FROM node:14.17.3-alpine3.14
-
-WORKDIR /usr/src/app
-
-COPY ./package*.json ./
-RUN npm install
-COPY ./server.js ./
-
-CMD ["npm","start"]

nginx-nodejs-redis/web1/package.json

@@ -1,15 +0,0 @@
-{
-  "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

@@ -1,24 +0,0 @@
-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

@@ -1,9 +0,0 @@
-FROM node:14.17.3-alpine3.14
-
-WORKDIR /usr/src/app
-
-COPY ./package.json ./
-RUN npm install
-COPY ./server.js ./
-
-CMD ["npm","start"]

nginx-nodejs-redis/web2/package.json

@@ -1,15 +0,0 @@
-{
-  "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

@@ -1,24 +0,0 @@
-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');
-});