Copying from build stage to final stage in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the Dockerfile line to copy files from the build stage to the final stage.

Docker

COPY --from=[1] /app/build /app

Drag options to blanks, or click blank then click option'

Astage1

Bfinal

Cbuilder

Dsource

Attempts:

3 left

💡 Hint

Common Mistakes

Using the final stage name instead of the build stage.

Using an undefined stage name.

The --from=builder option tells Docker to copy files from the build stage named 'builder'.

2fill in blank

medium

Complete the Dockerfile to name the build stage correctly.

Docker

FROM node:18 AS [1]

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Adeploy

Bruntime

Cfinal

Dbuilder

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'final' or 'runtime' which are usually for the last stage.

The build stage is named 'builder' to be referenced later for copying files.

3fill in blank

hard

Fix the error in the COPY command to correctly copy from the build stage.

Docker

COPY --from=[1] /usr/src/app/dist /app

Drag options to blanks, or click blank then click option'

Afinal

Bbuilder

Csource

Dlatest

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'final' or 'latest' which are not build stage names.

The correct stage to copy from is 'builder', which is the build stage.

4fill in blank

hard

Fill both blanks to complete the multi-stage Dockerfile snippet.

Docker

FROM python:3.12 AS [1]
RUN pip install -r requirements.txt
FROM alpine:latest AS [2]
COPY --from=[1] /app /app

Drag options to blanks, or click blank then click option'

Abuilder

Bfinal

Cruntime

Dbuild

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up stage names or using undefined names.

The first stage is named 'builder' where dependencies are installed. The second stage is 'final' where files are copied.

5fill in blank

hard

Fill all three blanks to complete the Dockerfile for copying build output to final stage.

Docker

FROM golang:1.20 AS [1]
WORKDIR /src
RUN go build -o app .
FROM scratch AS [2]
COPY --from=[1] [3] /app

Drag options to blanks, or click blank then click option'

Abuilder

Bfinal

C/src/app

D/app

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong stage names or wrong source path for COPY.

The build stage is named 'builder'. The final stage is 'final'. The built binary is at '/src/app' in the build stage.