Dynamodb table replica support

[mwarkentin]

what

• This feature will allow setting replica configurations for aws_dynamodb_table resource.

why

• According to the note at AWS provider v3.4.0 docs, it's recommended to use replica configuration instead of aws_dynamodb_global_table resource and there is a lack of that functionality in this module.

references

• Closes Global Table regions #41
• Replaces Allow to set replica configuration on aws_dynamodb_table resource #66, Take over from #66 with suggestions #82

[SweetOps]

/test all

[mwarkentin]

FYI, I haven't tested these changes myself yet, working on getting a terraform 0.13 environment set up to test (we're in the middle of upgrading from 12 -> 13 right now).

[SweetOps]

/test all

[mwarkentin]

I believe for global tables stream_view_type needs to be NEW_AND_OLD_IMAGES - is that something we want to configure automatically or just document and expect the user to pass in?

[mwarkentin]

Looks like there's some billing_mode requirements as well:

Error: error initially creating DynamoDB Table (wave-devmw-multi-region) replicas: error creating DynamoDB Table (wave-devmw-multi-region) replica (us-east-2): ValidationException: Table write capacity should either be Pay-Per-Request or AutoScaled.

Edit: looks like there's an open issue for this: hashicorp/terraform-provider-aws#13097

Edit 2: Can create from scratch without an issue when using billing_mode = "PAY_PER_REQUEST":

[mwarkentin]

/test all

[mwarkentin]

@SweetOps ready for another look whenever you're around. I've tested:

• DynamoDB tables creation works in both single-region and multi-region mode (with a caveat)
• Single-region table can be converted to multi-region, and back again

[SweetOps]

/test all

[SweetOps]

/test all

[mwarkentin]

@SweetOps thanks!