Retrieving list of AWS parameter store values and searching them

Terraform Providers AWS
1

Hey there,

We’re storing output values in the AWS SSM Parameter Store, and I’m having trouble figuring out how to take a list of parameters, and make it a little easier to reference them in other modules.

Here’s what I mean. Say I’ve got this code, to retrieve everything under /infrastructure/vpc in a certain AWS account:

data "aws_ssm_parameters_by_path" "vpc" {
  path = "/infrastructure/vpc"
  recursive = true
}

data.aws_ssm_parameters_by_path.vpc.names produces this list:

[
        "/infrastructure/vpc/private-subnets/app.dataA",
        "/infrastructure/vpc/private-subnets/app.dataB",
        "/infrastructure/vpc/private-subnets/app.privateA",
        "/infrastructure/vpc/private-subnets/app.privateB",
        "/infrastructure/vpc/public-subnets/app.publicA",
        "/infrastructure/vpc/public-subnets/app.publicB",
        "/infrastructure/vpc/vpc-id",
    ]

If we were importing a state file, we could just get these values by referencing the name of the output, however now I’ve got these strings to deal with.

Ideally, what I would like to do is retrieve the values of these parameters and build a map that would look something like this:

"vpc-id" = "parameterValue"
"app.publicA" = "parameterValue"

And they would be referenced like this:

local.mapname.vpc-id

I’ve been messing around with HCL to try to get what I want but haven’t really gotten anywhere, so I figure I’ll toss this out to the hivemind to see what you can come up with.