Mounting read-only volumes in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the Docker run command to mount a volume as read-only.

Docker

docker run -v /host/data:/container/data[1] alpine ls /container/data

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

A:r

B:rw

C:ro

D:read

Attempts:

3 left

💡 Hint

Common Mistakes

Using ':rw' which mounts the volume as read-write.

Using ':r' or ':read' which are invalid suffixes.

The ':ro' suffix mounts the volume as read-only, preventing writes inside the container.

2fill in blank

medium

Complete the Docker Compose volume definition to mount a host directory as read-only.

Docker

volumes:
  data:
    driver: local
    driver_opts:
      device: /host/data
      o: [1]
      type: none

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

Aro

Brw

Cread

Dr

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'rw' which allows writing.

Using 'read' or 'r' which are not valid mount options.

The option 'o: ro' sets the mount to read-only in Docker Compose volume options.

3fill in blank

hard

Fix the error in the Docker run command to correctly mount the volume as read-only.

Docker

docker run -v /host/data:/container/data[1] alpine ls /container/data

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

A:ro

B:read-only

C:readonly

D:rw

Attempts:

3 left

💡 Hint

Common Mistakes

Using ':readonly' or ':read-only' which are invalid.

Using ':rw' which mounts as read-write.

The correct suffix for read-only volume mount is ':ro'. Other variants cause errors.

4fill in blank

hard

Complete the code to mount a host directory as read-only and run a container that lists its contents.

Docker

docker run -v /host/data:/container/data[1] alpine ls /container/data

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

A:

B:ro

C:rw

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Missing ':' between host and container paths.

Using ':rw' instead of ':ro' for read-only.

The first blank needs ':' to separate host and container paths; the second blank ':ro' sets read-only mode.

5fill in blank

hard

Fill both blanks to create a Docker Compose service that mounts a volume read-only and runs a command.

Docker

services:
  app:
    image: alpine
    volumes:
      - /host/data:/container/data[1]
    command: ls [2] /container/data

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

A:

B:ro

D-l

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting ':' between paths.

Not using ':ro' for read-only volume.

Forgetting '-l' for detailed listing.

Use ':' to separate paths, ':ro' for read-only, and '-l' to list files in long format.