Terraform AWS Param Store with json

Since it took me a while to get this syntax sorted I am noting this for future use.

NOTE: This is non-sensitive parameters not secrets. You are probably better of using secrets manager for secrets. And I did not try but the Param Store SecureString type will probably not work for below.

I stored this json in Param Store as StringList with Value

{"email":"riaan@email.com","engine_version":"3.11.20","host_instance_type":"mq.t3.micro"}

test

❯ aws ssm get-parameter --name "/microservice/blah/development" --region us-east-1 | jq
{
  "Parameter": {
    "Name": "/microservice/blah/development",
    "Type": "StringList",
    "Value": "{\"email\":\"riaan@email.com\",\"engine_version\":\"3.11.20\",\"host_instance_type\":\"mq.t3.micro\"}",
    "Version": 6,
    "LastModifiedDate": "2023-12-01T08:53:33.920000-06:00",
    "ARN": "arn:aws:ssm:us-east-1:xxx:parameter/microservice/blah/development",
    "DataType": "text"
  }
}

get it to a local var

data "aws_ssm_parameter" "cfg" {
  provider = aws.target1
  name = "/microservice/blah/development"
}

locals {
  cfg = jsondecode(data.aws_ssm_parameter.cfg.value)
}

in terraform reference like this

  #engine_version = "3.11.20"
  engine_version = local.cfg.engine_version