Possible to create AWS DynamoDB Event source from Terraform?

[wi...@elevatedirect.com]

I'm setting up a configuration where updates in a DynamoDB trigger a Lambda function. All steps work except initializing an event source aka trigger. 

Workaround is to manually create the trigger and hardcoded that in the terraform config.

Should this be possible from terraform?

[Paul Hinze]

Hi there,

> Should this be possible from terraform?

Yep! I believe `aws_lambda_event_source_mapping` should do it:

https://terraform.io/docs/providers/aws/r/lambda_event_source_mapping.html

Hope this helps!

Paul

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[wi...@elevatedirect.com]

Hi Paul,

> Should this be possible from terraform?

Yep! I believe `aws_lambda_event_source_mapping` should do it:

https://terraform.io/docs/providers/aws/r/lambda_event_source_mapping.html

I have the mapping, but I need the stream aka event source aka trigger:

In the example, the ARN is:

event_source_arn = "arn:aws:kinesis:REGION:123456789012:stream/stream_name" 

When I create the DynamoDB using Terraform, there is a table without the stream/trigger.

When I create the mapping, I need to provide the name of a stream. So far, the only way I got this to work is to manually create a stream and put that in the config.

[Paul Hinze]

Aha - thanks for the clarification!

Yep you're right - looks like we need to support a few new attributes on aws_dynamodb_table for this to work in Terraform

Filed as an enhancement issue: https://github.com/hashicorp/terraform/issues/4188

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