Some notes about the development, testing and deployment workflow of docker
Architecture
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In Development
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In Production
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Docker Container
npm run start
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Docker Container
npm run build
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Dockerfile.dev
for development
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FROM node:alpine
WORKDIR '/app'
COPY package.json .
RUN npm install
COPY . .
CMD ["npm", "run", "start"]
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Could be run using
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docker build -f Dockerfile.dev .
docker run -p 3000:3000 <imageID>
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Using Volumes to reflect change in local code
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docker run -p 3000:3000 -v /app/node_modules -v $(pwd):/app <imageID>
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- Map the pwd into the ‘/app’ folder
- Put a bookmark on the node_modules folder, do not map to outside folder
Gitbash
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winpty docker run -it -p 3000:3000 -v /app/node_modules -v "/$(PWD)":/app CONTAINER_ID
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PowerShell
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docker run -it -p 3000:3000 -v /app/node_modules -v ${pwd}:/app CONTAINER_ID
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Docker Compose shorthand for volume
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version: '3'
services:
web:
stdin_open: true
environment:
- CHOKIDAR_USEPOLLING=true
build:
context: .
dockerfile: Dockerfile.dev
ports:
- '3000:3000'
volumes:
- /app/node_modules
- .:/app
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Executing Tests
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docker run -it <imageID> npm run test
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docker exec -it <containerID> npm run test
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Docker Compose for Running Tests
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version: '3'
services:
web:
stdin_open: true
environment:
- CHOKIDAR_USEPOLLING=true
build:
context: .
dockerfile: Dockerfile.dev
ports:
- '3000:3000'
volumes:
- /app/node_modules
- .:/app
tests:
stdin_open: true
build:
context: .
dockerfile: Dockerfile.dev
volumes:
- /app/node_modules
- .:/app
command: ['npm', 'run', 'test']
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Attach to the test suite
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docker ps
docker attach <tests_containerID>
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Dockerfile (Production)
Multi-Step Builds
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FROM node:alpine
WORKDIR '/app'
COPY package.json .
RUN npm install
COPY . .
RUN npm run build
FROM nginx
COPY --from=0 /app/build /usr/share/nginx/html
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To run
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docker build .
docker run -p 8080:80 <imageID>
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