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Docker compose nginx, node & redis
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| // ./app/Dockerfile | |
| FROM node:4.1.0 | |
| WORKDIR /src/app | |
| ADD package.json package.json | |
| RUN npm install |
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| // ./app/server.js | |
| let http = require('http'); | |
| let redis = require('redis'); | |
| const PORT = process.env.PORT || 3000; | |
| const DB_HOST = process.env.REDIS_PORT_6379_TCP_ADDR || '127.0.01'; | |
| const DB_PORT = process.env.REDIS_PORT_6379_TCP_PORT || 6379; | |
| const KEY_COUNTER = 'counter'; | |
| let client = redis.createClient(DB_PORT, DB_HOST); | |
| /** | |
| * @summary Increments and return a counter | |
| * @public | |
| * @function increment | |
| * | |
| * @returns {Promise} | |
| * | |
| * @example | |
| * increment() | |
| * .then(count => console.log(count)); | |
| * > 1 | |
| */ | |
| function increment() { | |
| return new Promise((resolve, reject) => client.incr(KEY_COUNTER, (err, reply) => { | |
| if (err) return reject(err); | |
| return resolve(reply); | |
| })); | |
| } | |
| let server = http.createServer((request, response) => { | |
| response.writeHead(200, {'Content-Type': 'text/html'}); | |
| response.write('<!DOCTYPE html>'); | |
| increment() | |
| .then(count => { | |
| response.write(`This page has been viewed ${count} times!`); | |
| response.end(); | |
| }) | |
| .catch( err => { | |
| response.write('Hello World!'); | |
| response.end(); | |
| }) | |
| }); | |
| server.listen(PORT, () => { | |
| process.stdout.write(`Listening on port: ${PORT} \n`); | |
| }); |
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| // ./docker-compose.yml | |
| nginx: | |
| build: ./nginx | |
| links: | |
| - node1:node1 | |
| - node2:node2 | |
| ports: | |
| - "80:80" | |
| node1: | |
| build: ./app | |
| volumes: | |
| - "./app:/src/app" | |
| ports: | |
| - "3000" | |
| links: | |
| - redis | |
| command: node server | |
| node2: | |
| build: ./app | |
| volumes: | |
| - "./app:/src/app" | |
| ports: | |
| - "3000" | |
| links: | |
| - redis | |
| command: node server | |
| redis: | |
| image: redis | |
| ports: | |
| - "6379" |
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| // ./nginx/Dockerfile | |
| FROM nginx:latest | |
| COPY nginx.conf /etc/nginx/nginx.conf |
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| // ./nginx/nginx.conf | |
| worker_processes 3; | |
| events { worker_connections 1024; } | |
| http { | |
| upstream node-app { | |
| least_conn; | |
| server node1:3000 weight=10 max_fails=3 fail_timeout=30s; | |
| server node2:3000 weight=10 max_fails=3 fail_timeout=30s; | |
| } | |
| server { | |
| listen 80; | |
| location / { | |
| proxy_pass http://node-app; | |
| proxy_http_version 1.1; | |
| proxy_set_header Upgrade $http_upgrade; | |
| proxy_set_header Connection 'upgrade'; | |
| proxy_set_header Host $host; | |
| proxy_cache_bypass $http_upgrade; | |
| } | |
| } | |
| } |
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