Which statement describes immutable infrastructure rollback approach?

Which statement describes immutable infrastructure rollback approach?

• A. Modify the live server configuration to revert changes.
• B. Patch the running instance in place.
• C. Replace servers by deploying the previously tested image.
• D. Disable deployment monitoring to avoid alerts.

Answer: (C)

In immutable infrastructure, changes are made by replacing components with new, pre-built artifacts rather than altering running ones. Rollback is achieved by deploying the previously tested image to replace the current one. This brings the system back to a known-good state quickly and deterministically, because the server fleet is rebuilt from a verified artifact instead of trying to undo changes in place. Replacing servers by deploying the previously tested image fits this approach because it avoids in-place edits and drift. You simply roll back to the earlier artifact that already passed testing and verification. Modifying the live server configuration, patching the running instance, or turning off monitoring all involve in-place changes or masking problems, which undermine the reproducibility and reliability that immutable infrastructure aims for.

In immutable infrastructure, changes are made by replacing components with new, pre-built artifacts rather than altering running ones. Rollback is achieved by deploying the previously tested image to replace the current one. This brings the system back to a known-good state quickly and deterministically, because the server fleet is rebuilt from a verified artifact instead of trying to undo changes in place.

Replacing servers by deploying the previously tested image fits this approach because it avoids in-place edits and drift. You simply roll back to the earlier artifact that already passed testing and verification.

Modifying the live server configuration, patching the running instance, or turning off monitoring all involve in-place changes or masking problems, which undermine the reproducibility and reliability that immutable infrastructure aims for.