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![Dockerfile CODE EDITOR FROM node:12-alpine RUN apk add --update --no-cache curl git vim RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app USER node WORKDIR /home/node/app COPY package*.json ./ COPY --chown=node:node . . RUN npm install EXPOSE 8080 CMD [ “node”, “app.js” ] 1. Build the base 2. Install container-level dependencies 3. Set working directory & user 4. Copy code, set permissions, and install project dependencies 5. Expose ports and invoke commands](https://image.slidesharecdn.com/kathleenjuelldockercon20202-200529022244/75/How-To-Build-and-Run-Node-Apps-with-Docker-and-Compose-18-2048.jpg)
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How To Build and Run Node Apps with Docker and Compose
The document provides a comprehensive guide on building and running Node.js applications using Docker and Docker Compose. It covers essential steps such as creating Dockerfiles, setting up service definitions, and managing environment variables, along with deployment considerations. It also highlights best practices for containerization, including the use of volumes and securing applications with Let's Encrypt.
How To Build and Run Node Apps with Docker and Compose
- 1. How to Buildand Run Node Applications With Docker and Compose - Kathleen Juell, Developer @ DigitalOcean, @katjuell
- 6. ● Building containers ●Containerizing for development with Compose ● Containerizing for deployment
- 10.
- 11. Containers and VMs ●Container features ○ Lightweight ○ Portable ○ Isolated Containers Virtual Machines
- 12. 1. Building anImage for a Node App
- 13. Dockerfile CODE EDITOR FROM node:12-alpine 1.Build the base
- 14. Dockerfile CODE EDITOR FROM node:12-alpine RUNapk add --update --no-cache vim 1. Build the base 2. Install container-level dependencies
- 15. Dockerfile CODE EDITOR FROM node:12-alpine RUNapk add --update --no-cache curl git vim 1. Build the base 2. Install container-level dependencies
- 16. Dockerfile CODE EDITOR FROM node:12-alpine RUNapk add --update --no-cache curl git vim RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app USER node WORKDIR /home/node/app 1. Build the base 2. Install container-level dependencies 3. Set working directory & user
- 17. Dockerfile CODE EDITOR FROM node:12-alpine RUNapk add --update --no-cache curl git vim RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app USER node WORKDIR /home/node/app COPY package*.json ./ COPY --chown=node:node . . RUN npm install 1. Build the base 2. Install container-level dependencies 3. Set working directory & user 4. Copy code, set permissions, and install project dependencies
- 18. Dockerfile CODE EDITOR FROM node:12-alpine RUNapk add --update --no-cache curl git vim RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app USER node WORKDIR /home/node/app COPY package*.json ./ COPY --chown=node:node . . RUN npm install EXPOSE 8080 CMD [ “node”, “app.js” ] 1. Build the base 2. Install container-level dependencies 3. Set working directory & user 4. Copy code, set permissions, and install project dependencies 5. Expose ports and invoke commands
- 19.
- 20. ● Build: dockerbuild -t <docker-demo> . ● Run: docker run --name <docker-demo> -p 80:8080 -d <docker-demo> ● Logs: docker logs <container-id> ● Check: docker ps -a ● Exec: docker exec -it <container-id> sh
- 21.
- 22. 2. Development Setup withCompose
- 23. A. Prepare theApplication
- 24. ● Service: Arunning container ● Service definition: Information about how the container will run
- 25. ● Service: Arunning container ● Service definition: Information about how the container will run ● 12FA principles to consider: 1. Store config in the environment & separate it from code; 2. Treat backing services as attached resources
- 26. Where to look& what to do? ● Where are your database credentials defined? ● Anything else that talks to an attached service?
- 27. Before: const mongoose =require('mongoose'); const MONGO_USERNAME = 'sammy'; const MONGO_PASSWORD = 'your_password'; const MONGO_HOSTNAME = '127.0.0.1'; const MONGO_PORT = '27017'; const MONGO_DB = 'sharkinfo'; const url = `mongodb://${MONGO_USERNAME}:${MONGO_PASSWORD}@${MONGO_H OSTNAME}:${MONGO_PORT}/${MONGO_DB}?authSource=admin`; mongoose.connect(url, {useNewUrlParser: true});
- 28. After: const mongoose =require('mongoose'); const { MONGO_USERNAME, MONGO_PASSWORD, MONGO_HOSTNAME, MONGO_PORT, MONGO_DB } = process.env; const url = `mongodb://${MONGO_USERNAME}:${MONGO_PASSWORD}@${MONGO_H OSTNAME}:${MONGO_PORT}/${MONGO_DB}?authSource=admin`; mongoose.connect(url, {useNewUrlParser: true});
- 29. Environment Variables: ● Use.env file
- 30. Environment Variables: ● Use.env file MONGO_USERNAME=sammy MONGO_PASSWORD=your_password MONGO_PORT=27017 MONGO_DB=sharkinfo
- 31. Environment Variables: ● Use.env file ● Credentials manager (orchestrated environments)
- 32. One more stopat `db.js`: . . . const options = { useNewUrlParser: true, reconnectTries: Number.MAX_VALUE, reconnectInterval: 500, connectTimeoutMS: 10000, }; const url = `mongodb://${MONGO_USERNAME}:${MONGO_PASSWORD}@${MONGO_HOSTNAME}:${MO NGO_PORT}/${MONGO_DB}?authSource=admin`; mongoose.connect(url, options).then( function() { console.log('MongoDB is connected'); }) .catch( function(err) { console.log(err); });
- 33. And an additionto `package.json`: ... "dependencies": { "ejs": "^2.6.1", "express": "^4.16.4", "mongoose": "^5.4.10" }, "devDependencies": { "nodemon": "^1.18.10" } }
- 34. B. Write theCompose File
- 35. Compose File CODE EDITOR version: '3.4' services: nodejs: build: context:. dockerfile: Dockerfile image: nodejs container_name: nodejs 1. Tell Compose how it should build the app image
- 36. Compose File CODE EDITOR version: '3.4' services: nodejs: build: context:. dockerfile: Dockerfile image: nodejs container_name: nodejs env_file: .env environment: - MONGO_HOSTNAME=db volumes: - .:/home/node/app - node_modules:/home/node/app/node_modules 1. Tell Compose how it should build the app image 2. Add environment and volume info
- 37. Compose File CODE EDITOR version: '3.4' services: nodejs: build: context:. dockerfile: Dockerfile image: nodejs container_name: nodejs env_file: .env environment: - MONGO_HOSTNAME=db volumes: - .:/home/node/app - node_modules:/home/node/app/node_modules 1. Tell Compose how it should build the app image 2. Add environment and volume info
- 38. Compose File CODE EDITOR version: '3.4' services: nodejs: build: context:. dockerfile: Dockerfile image: nodejs container_name: nodejs env_file: .env environment: - MONGO_HOSTNAME=db volumes: - .:/home/node/app - node_modules:/home/node/app/node_modules 1. Tell Compose how it should build the app image 2. Add environment and volume info
- 39. Compose File CODE EDITOR version: '3.4' services: nodejs: build: context:. dockerfile: Dockerfile image: nodejs container_name: nodejs env_file: .env environment: - MONGO_HOSTNAME=db volumes: - .:/home/node/app - node_modules:/home/node/app/node_modules: delegated 1. Tell Compose how it should build the app image 2. Add environment and volume info
- 40. Compose File CODE EDITOR version: '3.4' services: nodejs: build: context:. dockerfile: Dockerfile image: nodejs container_name: nodejs env_file: .env environment: - MONGO_HOSTNAME=db volumes: - .:/home/node/app - node_modules:/home/node/app/node_modules: delegated ports: - "80:8080" command: ./wait-for.sh db:27017 -- /home/node/app/node_modules/.bin/nodemon app.js 1. Tell Compose how it should build the app image 2. Add environment and volume info 3. Add ports and commands
- 41. Compose File CODE EDITOR . .. db: image: mongo:4.2-bionic container_name: db1. Tell Compose what image it should use
- 42. Compose File CODE EDITOR . .. db: image: mongo:4.2-bionic container_name: db env_file: .env environment: - MONGO_INITDB_ROOT_USERNAME=$MONGO_USERNAME - MONGO_INITDB_ROOT_PASSWORD=$MONGO_PASSWORD 1. Tell Compose what image it should use 2. Add environment info
- 43. Compose File CODE EDITOR . .. db: image: mongo:4.2-bionic container_name: db env_file: .env environment: - MONGO_INITDB_ROOT_USERNAME=$MONGO_USERNAME - MONGO_INITDB_ROOT_PASSWORD=$MONGO_PASSWORD volumes: - dbdata:/data/db 1. Tell Compose what image it should use 2. Add environment info 3. Add volumes
- 44. Compose File CODE EDITOR . .. volumes: dbdata: node_modules:1. Add top-level volumes key for named volumes
- 45. ● Run: docker-composeup -d ● List: docker-compose ps ● Logs: docker-compose logs <container> ● Exec: docker-compose exec <container> <command> ● Down: docker-compose down
- 46.
- 47. 3. Preparing toDeploy
- 48. Compose File TODO CODE EDITOR version: '3.4' services: nodejs: image:<yourDockerHubUsername>/nodejs:v1 container_name: nodejs 1. Application images: Pull from registry
- 49. Compose File TODO CODE EDITOR version: '3.4' services: nodejs: image:<yourDockerHubUsername>/nodejs:v1 container_name: nodejs volumes: - app_code:/home/node/app - node_modules:/home/node/app/node_modules 1. Application images: Pull from registry 2. Use Named Volumes: Prefer them over bind mounts for app code
- 50. Compose File TODO CODE EDITOR webserver: image: nginx:1.17-alpine container_name:webserver ports: - "80:80" volumes: - app_code:/var/www/html - ./nginx-conf:/etc/nginx/conf.d depends_on: - nodejs 1. Application images: Pull from registry 2. Use Named Volumes: Prefer them over bind mounts for app code 3. Add a web server
- 51. Compose File TODO CODE EDITOR webserver: image: nginx:1.17-alpine container_name:webserver ports: - "80:80" volumes: - app_code:/var/www/html - ./nginx-conf:/etc/nginx/conf.d depends_on: - nodejs 1. Application images: Pull from registry 2. Use Named Volumes: Prefer them over bind mounts for app code 3. Add a web server
- 52. Compose File TODO CODE EDITOR certbot: image: certbot/certbot container_name:certbot volumes: - certbot-etc:/etc/letsencrypt - certbot-var:/var/lib/letsencrypt - app_code:/var/www/html depends_on: - webserver command: certonly --webroot --webroot-path=/var/www/html --email sammy@example.com --agree-tos --no-eff-email --staging -d example.com -d www.example.com 1. Application images: Pull from registry 2. Use Named Volumes: Prefer them over bind mounts for app code 3. Add a web server
- 53. Compose File TODO CODE EDITOR webserver: image: nginx:1.17-alpine container_name:webserver ports: - "80:80" volumes: - app_code:/var/www/html - ./nginx-conf:/etc/nginx/conf.d - certbot-etc:/etc/letsencrypt - certbot-var:/var/lib/letsencrypt depends_on: - nodejs 1. Application images: Pull from registry 2. Use Named Volumes: Prefer them over bind mounts for app code 3. Add a web server
- 54. Compose File TODO CODE EDITOR webserver: image: nginx:1.17-alpine container_name:webserver ports: - "80:80" volumes: - app_code:/var/www/html - ./nginx-conf:/etc/nginx/conf.d - certbot-etc:/etc/letsencrypt - certbot-var:/var/lib/letsencrypt depends_on: - nodejs 1. Application images: Pull from registry 2. Use Named Volumes: Prefer them over bind mounts for app code 3. Add a web server 4. Docker for certs: How To Secure a Containerized Node Application with Let's Encrypt
- 55. How to Buildand Run Node Applications With Docker and Compose - Kathleen Juell, Developer @ DigitalOcean, @katjuell