aws-cloudformation / aws-cloudformation/cloudformation-coverage-roadmap

Support MoveReplicationTask when modifying ReplicationTask.ReplicationInstanceArn

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enhancement
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Description

### Name of the resource

AWS::DMS::ReplicationTask

### Resource name

_No response_

### Description

Currently modifying [ReplicationTask.ReplicationInstanceArn](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-dms-replicationtask.html#cfn-dms-replicationtask-replicationinstancearn) replaces the task, requiring data migration to start all over.

Modifying this attribute should use the `MoveReplicationTask` API to just move the task to the new instance.
https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Tasks.Moving.html

### Other Details

_No response_

Contributor guide

Open the contributing guide

Research direction

Start by reading the AWS DMS documentation for MoveReplicationTask and the CloudFormation behavior for AWS::DMS::ReplicationTask, especially ReplicationInstanceArn updates. Confirm the current replacement behavior and define done as changing the attribute moving the task to the new replication instance without restarting migration.

Written by the indexing model from the issue text.

Assessment

Tech stack
aws
Domain
cloud, data
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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