Backup and restore strategies in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to create a backup of a Docker volume named 'data_volume'.

Docker

docker run --rm -v data_volume:/data -v $(pwd):/backup busybox tar [1] -cvf /backup/data_backup.tar /data

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

A-tvf

B-cvf

C-xvf

D-rvf

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-xvf' which extracts instead of creating an archive.

Using '-tvf' which only lists contents of an archive.

The -cvf option in tar creates a new archive file. Here, it creates a backup archive of the volume.

2fill in blank

medium

Complete the command to restore a Docker volume from a backup file named 'data_backup.tar'.

Docker

docker run --rm -v data_volume:/data -v $(pwd):/backup busybox tar [1] -xvf /backup/data_backup.tar -C /data

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

A-tvf

B-rvf

C-xvf

D-cvf

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-cvf' which creates an archive instead of extracting.

Using '-tvf' which only lists contents of an archive.

The -xvf option extracts files from the archive. This restores the volume data from the backup.

3fill in blank

hard

Fix the error in the command to backup a Docker container's filesystem to a tar file.

Docker

docker export [1] > container_backup.tar

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

Acontainer_id

Bcontainer_name

Cimage_name

Dvolume_name

Attempts:

3 left

💡 Hint

Common Mistakes

Using image name instead of container ID or name.

Using volume name which is invalid for export.

The docker export command requires a container ID or name, not an image or volume name.

4fill in blank

hard

Fill the blank to create a backup of a Docker volume named 'app_data' into a compressed tar file.

Docker

docker run --rm -v app_data:/data -v $(pwd):/backup busybox tar [1] -czvf /backup/app_data_backup.tar.gz /data

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

A-tvf

B-xvf

C-cvf

D-czvf

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-cvf' which creates an uncompressed archive.

Using extract or list options instead of create and compress.

The -czvf option creates a compressed gzip archive of the volume. The z enables gzip compression.

5fill in blank

hard

Fill both blanks to restore a compressed backup 'app_data_backup.tar.gz' into a Docker volume named 'app_data'.

Docker

docker run --rm -v app_data:/data -v $(pwd):/backup busybox tar [1] -xzvf /backup/app_data_backup.tar.gz -C [2]

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

A-xzvf

B-xvf

C/data

D/backup

Attempts:

3 left

💡 Hint

Common Mistakes

Using create options instead of extract.

Using wrong target directory for extraction.

The -xzvf option extracts a gzip compressed archive. /data is the target directory inside the container where the volume is mounted.