Compose profiles for selective services in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a service named web in a Docker Compose file.

Docker

services:
  web:
    image: nginx
    [1]: "80:80"

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

Avolumes

Bnetworks

Cports

Ddepends_on

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'volumes' instead of 'ports' to expose ports.

The ports key maps container ports to host ports, allowing access to the service.

2fill in blank

medium

Complete the code to add a profile named 'debug' to the service 'app'.

Docker

services:
  app:
    image: myapp
    profiles:
      - [1]

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Adebug

Btest

Cproduction

Drelease

Attempts:

3 left

💡 Hint

Common Mistakes

Using a profile name that is not defined or intended.

The profiles key allows selective activation of services. Here, 'debug' is the profile name.

3fill in blank

hard

Fix the error in the profile definition for the service 'db'.

Docker

services:
  db:
    image: postgres
    profiles: [1]

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A[debug]

B['debug']

C- debug

Ddebug

Attempts:

3 left

💡 Hint

Common Mistakes

Writing profiles as a plain string instead of a list.

The profiles key expects a list. Using ['debug'] is the correct YAML list syntax.

4fill in blank

hard

Fill both blanks to define two services with profiles 'frontend' and 'backend'.

Docker

services:
  ui:
    image: ui-image
    profiles:
      - [1]
  api:
    image: api-image
    profiles:
      - [2]

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

Afrontend

Bbackend

Cdatabase

Dcache

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing profile names between frontend and backend services.

Assigning 'frontend' to the UI service and 'backend' to the API service allows selective startup.

5fill in blank

hard

Fill all three blanks to create a service with a profile and port mapping.

Docker

services:
  cache:
    image: redis
    profiles:
      - [1]
    ports:
      - "[2]:[3]"

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

Acache

B6379

Dredis

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong port numbers or mismatching profile names.

The service 'cache' uses the profile 'cache' and maps port 6379 on host to 6379 in container.