How do I convert existing AWS DynamoDB Locals Tables into Global Tables using boto3

0 votes

I have two DynamoDB tables in two different regions, with the same name, both streams enabled, both showing Global Table version 2019.11.21, one has data and one is empty. If I give examples, they can be shown below:

  • Region: us-east-1
  • Table name: MyTable
  • Global Table Version: 2019.11.21
  • The table has items: Yes
  • Region: us-east-2
  • Table name: MyTable
  • Global Table Version: 2019.11.21
  • The table has items: No

I used boto3 DynamoDB client.create_global_table() and client.update_global_table() without any success.

#1. Trying to create Global Table

import boto3

client = boto3.client('dynamodb')

response = client.create_global_table(

    GlobalTableName='MyTable',

    ReplicationGroup=[

        {

            'RegionName': 'us-east-1'

        },

    ]

)

Output:

botocore.exceptions.ClientError: An error occurred (ValidationException) when calling the CreateGlobalTable operation: One or more parameter values were invalid: Tables must be empty. These tables contain items: [TableReplica{regionName=us-east-1, tableName=MyTable}]

I understand that client.create_global_table() API call only applies to DynamoDB Table version 2017.11.29 which requires the tables to be empty. So, this won't work for me. Ref: here

#2. Trying to update Global Table

import boto3

client = boto3.client('dynamodb')

update_response = client.update_global_table(

    GlobalTableName='MyTable',

    ReplicaUpdates=[

        {

            'Create': {

                'RegionName': 'us-east-1'

            }

        }

    ]

)

Output:

botocore.errorfactory.GlobalTableNotFoundException: An error occurred (GlobalTableNotFoundException) when calling the UpdateGlobalTable operation: Global table not found: Global table with name: 'Mytable' does not exist.

Adding a second region us-east-2 also does not help.

The boto3 documentation version 1.17.66 does not specify anything particular about the DynamoDB table version to which this operation applies. So, I believe this should work for version 2019.11.21, but the Global Table first has to be in place. Ref: here

According to this blog post, a single region existing Local Table with items can be converted to a Global table. The example used in the blog post was using AWS CLI, but mentioned that AWS SDKs also could be used.

So, how can I do this with boto3?

Apr 5, 2022 in Others by Kichu
• 19,050 points
309 views

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