1Z0-1072-25 Question 29
Select 2Your organization maintains a set of mission-critical VM instances on Oracle Cloud Infrastructure (OCI). The DevOps team releases frequent OS updates and application patches, and they want to incorporate these changes into a standardized custom image. They also need to minimize downtime when rolling out the updated image to existing workloads. Which two strategies can help achieve this using OCI compute image options? (Choose two.)
- A
- Create a new custom image from a patch-updated instance, then launch a new instance with that image for a rolling upgrade.
- B
- Use the 'Update Image in Place' feature to automatically upgrade the operating system on the running instance without re-provisioning.
- C
- Bring your own image from an on-premises environment and directly replace the running instance� boot volume with it.
- D
- Terminate or decommission existing instances after ensuring any critical data is stored on persistent block volumes, then launch replacement instances from the newly created custom image.
Show answer and explanation
Correct answers: A, D
Explanation
OCI offers multiple image options, including Oracle-provided images, custom images, and support for importing your own images. To minimize downtime during updates, you can create a new custom image from a patched instance and then launch new instances, gradually migrating workloads to the updated image. Alternatively, you can safely terminate old instances (after securing data) and spin up new ones using the new custom image. Refer to OCI� official documentation on 'Managing Custom Images' for best practices and detailed steps.
- A. Correct.
Option 1: CORRECT. Creating a new custom image from a fully patched instance is a recommended approach. You can then launch new instances using that updated image, allowing a rolling or phased upgrade strategy with minimal downtime.
- B. Incorrect.
Option 2: INCORRECT. There is no 'Update Image in Place' feature that automatically replaces the running boot image with a new custom image. You must create new instances or replace boot volumes.
- C. Incorrect.
Option 3: INCORRECT. While you can import images from on-premises, you cannot simply replace a running instance� boot volume with an imported image without going through the proper import and instance creation process. It also does not ensure minimal downtime by itself.
- D. Correct.
Option 4: CORRECT. Terminating or decommissioning old instances (once data is stored on separate block volumes or otherwise preserved) and launching new ones from the updated custom image is a practical way to roll out changes without affecting the entire fleet at once.