DCA · Question #49
Which of the following is NOT backed up when performing a Docker Trusted backup operation?
The correct answer is C. Image blobs. Docker Trusted Registry (DTR) backup operations primarily store metadata and configurations, but not the actual image layer data (blobs), which are managed by the configured storage backend.
Question
Which of the following is NOT backed up when performing a Docker Trusted backup operation?
Options
- AAccess control to repos and images
- BRepository metadata
- CImage blobs
- DDTR configurations
How the community answered
(45 responses)- A7% (3)
- B2% (1)
- C89% (40)
- D2% (1)
Why each option
Docker Trusted Registry (DTR) backup operations primarily store metadata and configurations, but not the actual image layer data (blobs), which are managed by the configured storage backend.
Access control information for repositories and images, including user permissions, is an essential part of a DTR backup.
Repository metadata, such as image tags, vulnerability scan results, and other repository-specific data, is included in a DTR backup.
When performing a DTR backup operation, the actual image layer data, commonly referred to as image blobs, are NOT backed up. Image blobs are stored in the underlying object storage backend (e.g., S3, NFS) configured for DTR, and their backup and lifecycle management are handled independently by that storage solution, not DTR's internal backup mechanism.
All Docker Trusted Registry configurations, including cluster settings, user management, and general setup, are preserved in a DTR backup.
Concept tested: Docker Trusted Registry (DTR) backup scope
Source: https://docs.mirantis.com/docker-enterprise/v3.2/dtr/admin/back-up-and-restore.html
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