Nginx/Node/Redis and Flask/Redis Compose example (#222)
* Added Node, Nginx and Redis Project * Added Flask/Redismaster
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FROM python:3.11.0a6-alpine3.15
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WORKDIR /code
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COPY requirements.txt /code
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RUN pip install -r requirements.txt --no-cache-dir
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COPY . /code
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CMD python app.py
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## Compose sample application
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### Python/Flask application using a Redis database
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Project structure:
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```
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.
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├── Dockerfile
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├── README.md
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├── app.py
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├── docker-compose.yml
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└── requirements.txt
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```
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[_docker-compose.yml_](docker-compose.yml)
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```
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services:
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redis:
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image: redislabs/redismod
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ports:
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- '6379:6379'
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web:
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build: .
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ports:
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- "5000:5000"
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volumes:
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- .:/code
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depends_on:
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- redis
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```
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## Deploy with docker-compose
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```
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$ docker-compose up -d
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[+] Running 24/24
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⠿ redis Pulled
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...
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⠿ 565225d89260 Pull complete
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[+] Building 12.7s (10/10) FINISHED
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=> [internal] load build definition from Dockerfile ...
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[+] Running 3/3
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⠿ Network flask-redis_default Created
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⠿ Container flask-redis-redis-1 Started
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⠿ Container flask-redis-web-1 Started
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```
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## Expected result
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Listing containers must show one container running and the port mapping as below:
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```
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$ docker-compose ps
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NAME COMMAND SERVICE STATUS PORTS
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flask-redis-redis-1 "redis-server --load…" redis running 0.0.0.0:6379->6379/tcp
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flask-redis-web-1 "/bin/sh -c 'python …" web running 0.0.0.0:5000->5000/tcp
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```
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After the application starts, navigate to `http://localhost:5000` in your web browser or run:
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```
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$ curl localhost:5000
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This webpage has been viewed 2 time(s)
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```
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## Monitoring Redis keys
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Connect to redis database by using ```redis-cli``` command and monitor the keys.
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```
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redis-cli -p 6379
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127.0.0.1:6379> monitor
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OK
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1646634062.732496 [0 172.21.0.3:33106] "INCRBY" "hits" "1"
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1646634062.735669 [0 172.21.0.3:33106] "GET" "hits"
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```
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Stop and remove the containers
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```
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$ docker-compose down
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```
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from flask import Flask
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from redis import Redis
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app = Flask(__name__)
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redis = Redis(host='redis', port=6379)
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@app.route('/')
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def hello():
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redis.incr('hits')
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counter = str(redis.get('hits'),'utf-8')
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return "This webpage has been viewed "+counter+" time(s)"
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if __name__ == "__main__":
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app.run(host="0.0.0.0", debug=True)
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services:
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redis:
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image: redislabs/redismod
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ports:
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- '6379:6379'
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web:
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build: .
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ports:
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- "5000:5000"
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volumes:
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- .:/code
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depends_on:
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- redis
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flask
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redis
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services:
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redis:
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image: 'redislabs/redismod'
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ports:
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- '6379:6379'
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web1:
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restart: on-failure
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build: ./web
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hostname: web1
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ports:
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- '81:5000'
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web2:
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restart: on-failure
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build: ./web
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hostname: web2
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ports:
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- '82:5000'
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nginx:
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build: ./nginx
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ports:
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- '80:80'
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depends_on:
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- web1
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- web2
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FROM nginx:1.21.6
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RUN rm /etc/nginx/conf.d/default.conf
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COPY nginx.conf /etc/nginx/conf.d/default.conf
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upstream loadbalancer {
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server web1:5000;
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server web2:5000;
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}
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server {
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listen 80;
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server_name localhost;
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location / {
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proxy_pass http://loadbalancer;
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}
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}
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node_modules
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@ -0,0 +1,9 @@
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FROM node:14.17.3-alpine3.14
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WORKDIR /usr/src/app
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COPY package.json package-lock.json ./
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RUN npm ci
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COPY ./server.js ./
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CMD ["npm","start"]
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{
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"name": "web",
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"version": "1.0.0",
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"lockfileVersion": 1,
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"requires": true,
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"dependencies": {
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"accepts": {
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"version": "1.3.8",
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"resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
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"integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
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"requires": {
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"mime-types": "~2.1.34",
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"negotiator": "0.6.3"
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}
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},
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"array-flatten": {
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"version": "1.1.1",
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"resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
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"integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
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},
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"body-parser": {
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"version": "1.19.2",
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"resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.2.tgz",
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"integrity": "sha512-SAAwOxgoCKMGs9uUAUFHygfLAyaniaoun6I8mFY9pRAJL9+Kec34aU+oIjDhTycub1jozEfEwx1W1IuOYxVSFw==",
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"requires": {
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"bytes": "3.1.2",
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"content-type": "~1.0.4",
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"debug": "2.6.9",
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"depd": "~1.1.2",
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"http-errors": "1.8.1",
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"iconv-lite": "0.4.24",
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"on-finished": "~2.3.0",
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"qs": "6.9.7",
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"raw-body": "2.4.3",
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"type-is": "~1.6.18"
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}
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},
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"bytes": {
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"version": "3.1.2",
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"resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
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"integrity": "sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg=="
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},
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"content-disposition": {
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"version": "0.5.4",
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"resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
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"integrity": "sha512-FveZTNuGw04cxlAiWbzi6zTAL/lhehaWbTtgluJh4/E95DqMwTmha3KZN1aAWA8cFIhHzMZUvLevkw5Rqk+tSQ==",
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"requires": {
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"safe-buffer": "5.2.1"
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}
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},
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"content-type": {
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"version": "1.0.4",
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"resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
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"integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA=="
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},
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"cookie": {
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"version": "0.4.2",
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"resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.2.tgz",
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"integrity": "sha512-aSWTXFzaKWkvHO1Ny/s+ePFpvKsPnjc551iI41v3ny/ow6tBG5Vd+FuqGNhh1LxOmVzOlGUriIlOaokOvhaStA=="
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},
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"cookie-signature": {
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"version": "1.0.6",
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"resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
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"integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
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},
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"debug": {
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"version": "2.6.9",
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"resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
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"integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
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"requires": {
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"ms": "2.0.0"
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}
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},
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"denque": {
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"version": "1.5.1",
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"resolved": "https://registry.npmjs.org/denque/-/denque-1.5.1.tgz",
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"integrity": "sha512-XwE+iZ4D6ZUB7mfYRMb5wByE8L74HCn30FBN7sWnXksWc1LO1bPDl67pBR9o/kC4z/xSNAwkMYcGgqDV3BE3Hw=="
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},
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"depd": {
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"version": "1.1.2",
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"resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
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"integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak="
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},
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"destroy": {
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"version": "1.0.4",
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"resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
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"integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
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},
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"ee-first": {
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"version": "1.1.1",
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"resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
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"integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
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},
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"encodeurl": {
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"version": "1.0.2",
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"resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
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"integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
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},
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"escape-html": {
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"version": "1.0.3",
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"resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
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"integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
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},
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"etag": {
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"version": "1.8.1",
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"resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
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"integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
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},
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"express": {
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"version": "4.17.3",
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"resolved": "https://registry.npmjs.org/express/-/express-4.17.3.tgz",
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"integrity": "sha512-yuSQpz5I+Ch7gFrPCk4/c+dIBKlQUxtgwqzph132bsT6qhuzss6I8cLJQz7B3rFblzd6wtcI0ZbGltH/C4LjUg==",
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"requires": {
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"accepts": "~1.3.8",
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"array-flatten": "1.1.1",
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"body-parser": "1.19.2",
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"content-disposition": "0.5.4",
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"content-type": "~1.0.4",
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"cookie": "0.4.2",
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"cookie-signature": "1.0.6",
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"debug": "2.6.9",
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"depd": "~1.1.2",
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"encodeurl": "~1.0.2",
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"escape-html": "~1.0.3",
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"etag": "~1.8.1",
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"finalhandler": "~1.1.2",
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"fresh": "0.5.2",
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"merge-descriptors": "1.0.1",
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"methods": "~1.1.2",
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"on-finished": "~2.3.0",
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"parseurl": "~1.3.3",
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"path-to-regexp": "0.1.7",
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"proxy-addr": "~2.0.7",
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"qs": "6.9.7",
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"range-parser": "~1.2.1",
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"safe-buffer": "5.2.1",
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"send": "0.17.2",
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"serve-static": "1.14.2",
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"setprototypeof": "1.2.0",
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"statuses": "~1.5.0",
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"type-is": "~1.6.18",
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"utils-merge": "1.0.1",
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"vary": "~1.1.2"
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}
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},
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"finalhandler": {
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"version": "1.1.2",
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"resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.2.tgz",
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"integrity": "sha512-aAWcW57uxVNrQZqFXjITpW3sIUQmHGG3qSb9mUah9MgMC4NeWhNOlNjXEYq3HjRAvL6arUviZGGJsBg6z0zsWA==",
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"requires": {
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"debug": "2.6.9",
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"encodeurl": "~1.0.2",
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"escape-html": "~1.0.3",
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"on-finished": "~2.3.0",
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"parseurl": "~1.3.3",
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"statuses": "~1.5.0",
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"unpipe": "~1.0.0"
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}
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},
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"forwarded": {
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"version": "0.2.0",
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"resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
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"integrity": "sha512-buRG0fpBtRHSTCOASe6hD258tEubFoRLb4ZNA6NxMVHNw2gOcwHo9wyablzMzOA5z9xA9L1KNjk/Nt6MT9aYow=="
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},
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"fresh": {
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"version": "0.5.2",
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"resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
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"integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac="
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},
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"http-errors": {
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"version": "1.8.1",
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||||||
|
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},
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"raw-body": {
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"requires": {
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}
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},
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"redis": {
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"requires": {
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}
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},
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},
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}
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},
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|
"safe-buffer": {
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"version": "5.2.1",
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"integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="
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},
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"version": "2.1.2",
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"send": {
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"version": "0.17.2",
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"requires": {
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"debug": "2.6.9",
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"depd": "~1.1.2",
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"destroy": "~1.0.4",
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"encodeurl": "~1.0.2",
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"escape-html": "~1.0.3",
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"etag": "~1.8.1",
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"fresh": "0.5.2",
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"http-errors": "1.8.1",
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"mime": "1.6.0",
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"ms": "2.1.3",
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"on-finished": "~2.3.0",
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"range-parser": "~1.2.1",
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|
"statuses": "~1.5.0"
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|
},
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|
"dependencies": {
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|
"ms": {
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"version": "2.1.3",
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"resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
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}
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|
}
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|
},
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|
"serve-static": {
|
||||||
|
"version": "1.14.2",
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"resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.2.tgz",
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"integrity": "sha512-+TMNA9AFxUEGuC0z2mevogSnn9MXKb4fa7ngeRMJaaGv8vTwnIEkKi+QGvPt33HSnf8pRS+WGM0EbMtCJLKMBQ==",
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|
"requires": {
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"encodeurl": "~1.0.2",
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|
"escape-html": "~1.0.3",
|
||||||
|
"parseurl": "~1.3.3",
|
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|
"send": "0.17.2"
|
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|
}
|
||||||
|
},
|
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|
"setprototypeof": {
|
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|
"version": "1.2.0",
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"resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
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},
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"statuses": {
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"version": "1.5.0",
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|
"resolved": "https://registry.npmjs.org/statuses/-/statuses-1.5.0.tgz",
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|
"integrity": "sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow="
|
||||||
|
},
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|
"toidentifier": {
|
||||||
|
"version": "1.0.1",
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||||||
|
"resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
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|
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|
},
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|
"type-is": {
|
||||||
|
"version": "1.6.18",
|
||||||
|
"resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
|
||||||
|
"integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
|
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|
"requires": {
|
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|
"media-typer": "0.3.0",
|
||||||
|
"mime-types": "~2.1.24"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"unpipe": {
|
||||||
|
"version": "1.0.0",
|
||||||
|
"resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
|
||||||
|
"integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
|
||||||
|
},
|
||||||
|
"utils-merge": {
|
||||||
|
"version": "1.0.1",
|
||||||
|
"resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
|
||||||
|
"integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
|
||||||
|
},
|
||||||
|
"vary": {
|
||||||
|
"version": "1.1.2",
|
||||||
|
"resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
|
||||||
|
"integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
@ -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"
|
||||||
|
}
|
@ -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');
|
||||||
|
});
|
Loading…
Reference in New Issue