1Z0-1123-25 Question 60
Select 2Your organization needs to migrate a production Oracle Linux 7 instance from AWS EC2 to Oracle Cloud Infrastructure (OCI). The instance contains custom configurations and a range of mission-critical applications that must remain intact after the move. You have decided to export the EC2 instance and import it as a custom image in OCI. Which two steps should you follow to ensure a seamless migration with minimal downtime?
- A
Export the AMI from EC2 to an OVA file, upload it to an OCI Object Storage bucket in the same region, and import it as a custom image.
- B
Create a fresh instance in OCI using the Oracle Linux 7 platform image and manually copy only application binaries from AWS EC2 to the new instance.
- C
Use AWS VM Export to generate VMDK files, upload them to OCI Object Storage, and import them as a custom image using the OCI Console or CLI.
- D
Enable cross-region replication in AWS to clone the instance directly into OCI without exporting or importing images.
- E
Shut down the EC2 instance and directly attach its root volume to a running OCI instance for reading all data in place.
Show answer and explanation
Correct answers: A, C
Explanation
To preserve a full OS configuration and custom applications while minimizing downtime, the recommended approach is to export the instance from AWS EC2 (either in OVA or VMDK format) and import it as a custom image into OCI. This ensures that the OS, applications, and settings remain intact when the new instance is launched in OCI. Refer to the official Oracle documentation for the image import process: https://docs.oracle.com/en-us/iaas/Content/Compute/Tasks/importingcustomimagestasks.htm.
- A. Correct.
Option 1: CORRECT. This is a valid method for migrating an EC2 instance to OCI. By exporting the EC2 AMI to an OVA file, uploading it to OCI Object Storage, and importing it as a custom image, you preserve OS configurations and installed applications. This aligns with OCI best practices for custom image import.
- B. Incorrect.
Option 2: INCORRECT. Simply creating a fresh instance on OCI and manually copying only binaries does not preserve nuanced OS configurations, system libraries, and dependencies. This approach can lead to inconsistencies or missing critical files.
- C. Correct.
Option 3: CORRECT. Using AWS VM Export to produce a VMDK file, uploading it to OCI Object Storage, and importing it as a custom image is another recommended path. It preserves the entire operating system and installed applications, ensuring minimal manual reconfiguration.
- D. Incorrect.
Option 4: INCORRECT. AWS cross-region replication cannot directly clone instances into OCI. That feature is limited to AWS regions and will not migrate resources to a separate cloud provider.
- E. Incorrect.
Option 5: INCORRECT. You cannot directly attach an AWS EC2 volume to an OCI instance. The volume formats and underlying cloud infrastructures differ, so you must export and import images properly.