diff --git a/README.md b/README.md index 770f2fa..4627833 100644 --- a/README.md +++ b/README.md @@ -30,11 +30,12 @@ a MySQL database. - [`NGINX / ASP.NET / MySQL`](https://github.com/docker/awesome-compose/tree/master/nginx-aspnet-mysql) - Sample Nginx reverse proxy with an C# backend using ASP.NET - [`NGINX / Flask / MongoDB`](https://github.com/docker/awesome-compose/tree/master/nginx-flask-mongo) - Sample Python/Flask application with Nginx proxy and a Mongo database. -- [`NGINX / Flask / MySQL`](https://github.com/docker/awesome-compose/tree/master/nginx-flask-mysql) - Sample Python/Flask -application with an Nginx proxy and a MySQL database. +- [`NGINX / Flask / MySQL`](https://github.com/docker/awesome-compose/tree/master/nginx-flask-mysql) - Sample Python/Flask application with an Nginx proxy and a MySQL database. +- [`NGINX / Node.js / Redis`](https://github.com/docker/awesome-compose/tree/master/nginx-nodejs-redis) - Sample Node.js application with Nginx proxy and a Redis database - [`NGINX / Go`](https://github.com/docker/awesome-compose/tree/master/nginx-golang) - Sample Nginx proxy with a Go backend. - [`NGINX / WSGI / Flask`](https://github.com/docker/awesome-compose/tree/master/nginx-wsgi-flask) - Sample Nginx reverse proxy with a Flask backend using WSGI. - [`PostgreSQL / pgAdmin`](https://github.com/docker/awesome-compose/tree/master/postgresql-pgadmin) - Sample setup for postgreSQL database with pgAdmin web interface +- [`Python / Flask / Redis`](https://github.com/docker/awesome-compose/tree/master/flask-redis) - Sample Python/Flask and a Redis database - [`React / Spring / MySQL`](https://github.com/docker/awesome-compose/tree/master/react-java-mysql) - Sample React application with a Spring backend and a MySQL database. - [`React / Express / MySQL`](https://github.com/docker/awesome-compose/tree/master/react-express-mysql) - Sample React diff --git a/flask-redis/Dockerfile b/flask-redis/Dockerfile new file mode 100644 index 0000000..856d946 --- /dev/null +++ b/flask-redis/Dockerfile @@ -0,0 +1,6 @@ +FROM python:3.11.0a6-alpine3.15 +WORKDIR /code +COPY requirements.txt /code +RUN pip install -r requirements.txt --no-cache-dir +COPY . /code +CMD python app.py diff --git a/flask-redis/README.md b/flask-redis/README.md new file mode 100644 index 0000000..dc2fdd7 --- /dev/null +++ b/flask-redis/README.md @@ -0,0 +1,82 @@ +## Compose sample application + +### Python/Flask application using a Redis database + +Project structure: + +``` +. +├── Dockerfile +├── README.md +├── app.py +├── docker-compose.yml +└── requirements.txt +``` + +[_docker-compose.yml_](docker-compose.yml) + +``` +services: + redis: + image: redislabs/redismod + ports: + - '6379:6379' + web: + build: . + ports: + - "5000:5000" + volumes: + - .:/code + depends_on: + - redis +``` + +## Deploy with docker-compose + +``` +$ docker-compose up -d +[+] Running 24/24 + ⠿ redis Pulled + ... + ⠿ 565225d89260 Pull complete +[+] Building 12.7s (10/10) FINISHED + => [internal] load build definition from Dockerfile ... +[+] Running 3/3 + ⠿ Network flask-redis_default Created + ⠿ Container flask-redis-redis-1 Started + ⠿ Container flask-redis-web-1 Started +``` + +## Expected result + +Listing containers must show one container running and the port mapping as below: +``` + +$ docker-compose ps +NAME COMMAND SERVICE STATUS PORTS +flask-redis-redis-1 "redis-server --load…" redis running 0.0.0.0:6379->6379/tcp +flask-redis-web-1 "/bin/sh -c 'python …" web running 0.0.0.0:5000->5000/tcp +``` + +After the application starts, navigate to `http://localhost:5000` in your web browser or run: +``` +$ curl localhost:5000 +This webpage has been viewed 2 time(s) +``` + +## Monitoring Redis keys + +Connect to redis database by using ```redis-cli``` command and monitor the keys. +``` +redis-cli -p 6379 +127.0.0.1:6379> monitor +OK +1646634062.732496 [0 172.21.0.3:33106] "INCRBY" "hits" "1" +1646634062.735669 [0 172.21.0.3:33106] "GET" "hits" +``` + + +Stop and remove the containers +``` +$ docker-compose down +``` diff --git a/flask-redis/app.py b/flask-redis/app.py new file mode 100644 index 0000000..873a3cf --- /dev/null +++ b/flask-redis/app.py @@ -0,0 +1,14 @@ +from flask import Flask +from redis import Redis + +app = Flask(__name__) +redis = Redis(host='redis', port=6379) + +@app.route('/') +def hello(): + redis.incr('hits') + counter = str(redis.get('hits'),'utf-8') + return "This webpage has been viewed "+counter+" time(s)" + +if __name__ == "__main__": + app.run(host="0.0.0.0", debug=True) diff --git a/flask-redis/docker-compose.yml b/flask-redis/docker-compose.yml new file mode 100644 index 0000000..4029e17 --- /dev/null +++ b/flask-redis/docker-compose.yml @@ -0,0 +1,13 @@ +services: + redis: + image: redislabs/redismod + ports: + - '6379:6379' + web: + build: . + ports: + - "5000:5000" + volumes: + - .:/code + depends_on: + - redis diff --git a/flask-redis/requirements.txt b/flask-redis/requirements.txt new file mode 100644 index 0000000..1a5dc97 --- /dev/null +++ b/flask-redis/requirements.txt @@ -0,0 +1,2 @@ +flask +redis diff --git a/nginx-nodejs-redis/README.md b/nginx-nodejs-redis/README.md new file mode 100644 index 0000000..c2e5886 --- /dev/null +++ b/nginx-nodejs-redis/README.md @@ -0,0 +1,108 @@ +## Compose sample application + +## Node.js application with Nginx proxy and Redis database + +Project structure: +``` +. +├── README.md +├── docker-compose.yml +├── nginx +│   ├── Dockerfile +│   └── nginx.conf +└── web + ├── Dockerfile + ├── package.json + └── server.js + +2 directories, 7 files + + +``` +[_docker-compose.yml_](docker-compose.yml) +``` +redis: + image: 'redislabs/redismod' + ports: + - '6379:6379' + web1: + restart: on-failure + build: ./web + hostname: web1 + ports: + - '81:5000' + web2: + restart: on-failure + build: ./web + hostname: web2 + ports: + - '82:5000' + nginx: + build: ./nginx + ports: + - '80:80' + depends_on: + - web1 + - web2 +``` +The compose file defines an application with four services `redis`, `nginx`, `web1` and `web2`. +When deploying the application, docker-compose maps port 80 of the nginx service container to port 80 of the host as specified in the file. + + +> ℹ️ **_INFO_** +> Redis runs on port 6379 by default. Make sure port 6379 on the host is not being used by another container, otherwise the port should be changed. + +## Deploy with docker-compose + +``` +$ docker-compose up -d +[+] Running 24/24 + ⠿ redis Pulled ... + ⠿ 565225d89260 Pull complete +[+] Building 2.4s (22/25) + => [nginx-nodejs-redis_nginx internal] load build definition from Dockerfile ... +[+] Running 5/5 + ⠿ Network nginx-nodejs-redis_default Created + ⠿ Container nginx-nodejs-redis-web2-1 Started + ⠿ Container nginx-nodejs-redis-redis-1 Started + ⠿ Container nginx-nodejs-redis-web1-1 Started + ⠿ Container nginx-nodejs-redis-nginx-1 Started +``` + + +## Expected result + +Listing containers must show three containers running and the port mapping as below: + + +``` +docker-compose ps +``` + +## Testing the app + +After the application starts, navigate to `http://localhost:80` in your web browser or run: + +``` +curl localhost:80 +curl localhost:80 +web1: Total number of visits is: 1 +``` + +``` +curl localhost:80 +web1: Total number of visits is: 2 +``` +``` +$ curl localhost:80 +web2: Total number of visits is: 3 +``` + + + +## Stop and remove the containers + +``` +$ docker-compose down +``` + diff --git a/nginx-nodejs-redis/docker-compose.yml b/nginx-nodejs-redis/docker-compose.yml new file mode 100644 index 0000000..7f3748c --- /dev/null +++ b/nginx-nodejs-redis/docker-compose.yml @@ -0,0 +1,27 @@ + +services: + redis: + image: 'redislabs/redismod' + ports: + - '6379:6379' + web1: + restart: on-failure + build: ./web + hostname: web1 + ports: + - '81:5000' + web2: + restart: on-failure + build: ./web + hostname: web2 + ports: + - '82:5000' + nginx: + build: ./nginx + ports: + - '80:80' + depends_on: + - web1 + - web2 + + diff --git a/nginx-nodejs-redis/nginx/Dockerfile b/nginx-nodejs-redis/nginx/Dockerfile new file mode 100644 index 0000000..67cab10 --- /dev/null +++ b/nginx-nodejs-redis/nginx/Dockerfile @@ -0,0 +1,3 @@ +FROM nginx:1.21.6 +RUN rm /etc/nginx/conf.d/default.conf +COPY nginx.conf /etc/nginx/conf.d/default.conf diff --git a/nginx-nodejs-redis/nginx/nginx.conf b/nginx-nodejs-redis/nginx/nginx.conf new file mode 100644 index 0000000..83c222b --- /dev/null +++ b/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; + } +} diff --git a/nginx-nodejs-redis/web/.gitignore b/nginx-nodejs-redis/web/.gitignore new file mode 100644 index 0000000..3c3629e --- /dev/null +++ b/nginx-nodejs-redis/web/.gitignore @@ -0,0 +1 @@ +node_modules diff --git a/nginx-nodejs-redis/web/Dockerfile b/nginx-nodejs-redis/web/Dockerfile new file mode 100644 index 0000000..3d1b21f --- /dev/null +++ b/nginx-nodejs-redis/web/Dockerfile @@ -0,0 +1,9 @@ +FROM node:14.17.3-alpine3.14 + +WORKDIR /usr/src/app + +COPY package.json package-lock.json ./ +RUN npm ci +COPY ./server.js ./ + +CMD ["npm","start"] diff --git 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"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" +} diff --git a/nginx-nodejs-redis/web/server.js b/nginx-nodejs-redis/web/server.js new file mode 100644 index 0000000..ae1d6d5 --- /dev/null +++ b/nginx-nodejs-redis/web/server.js @@ -0,0 +1,24 @@ +const os = require('os'); +const express = require('express'); +const app = express(); +const redis = require('redis'); +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(os.hostname() +': Number of visits is: ' + numVisitsToDisplay); + numVisits++; + redisClient.set('numVisits', numVisits); + }); +}); + +app.listen(5000, function() { + console.log('Web application is listening on port 5000'); +});