Creating an RDS DB Cross Region Replica in AWS using Terraform

So over the past week I’ve been scratching my head trying to figure out how to create a replica of my amazon aurora database in another region for DR purposes and deploying it via terraform.

The primary instance is located in us-east-1 and for our purposes, it was decided to create the DR replica in eu-west-1. Ireland is round the corner and things like the VPC and security-groups were already created.

I started off by creating a main.tf file which contained my two providers, one for the primary region (us-east-1) and another for the DR region (eu-west-1).

Adding the alias to the eu-west-1 provider allows us to reference it in the appropriate module later on.

In the same file, I added the two module blocks -

Check out the file structure below -

Let’s start with the primary cluster to which our application writes to and from where we source the data sent to the replica.

Couple of quick points -

Take a look at the DR side below -

If you need actual helpful stuff, go here -

Hope this helps!!

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