Create a Data Source Provider for the "Service Discovery" Instances Resource

[matt-land]

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Description

Create a Data Source Provider for the Service Discovery Resources:

aws_service_discovery_instance

New or Affected Resource(s)

The following Data Sources would be new. (The resources already exist)

aws_service_discovery_instance

Potential Terraform Configuration

Below is a potential use case for how the data sources could be used in a Terraform Configuration

data "aws_service_discovery_dns_namespace" "foo" {
  count = length(var.control_plane_groups) > 0 ? 1 : 0
  type = "DNS_PRIVATE"
  name = "foo.io"
}

data "aws_service_discovery_service" "service_one" {
  count = length(var.control_plane_groups) > 0 ? 1 : 0
  name         = var.control_plane_groups[count.index]
  namespace_id = data.aws_service_discovery_dns_namespace.foo.id
}

data "aws_service_discovery_instances" "instances" {  # returns a list of matching instances
  service_id = data.aws_service_discovery_service.service_one.id  #required
  filter = [ # optional
    {name: "id", value: "blue*"},  # filter by InstanceId or prefix
    {name: "creator_request_id", value: ""}, # filter by CreatorRequestId or prefix
    {name: "health_status", value: "Healthy"}, # filter by health, accepts Healthy , Unhealthy , or Unknown
    {name: "attribute:AWS_INSTANCE_PORT", value: "8080"}, # filter by attribute AWS_INSTANCE_IPV4, AWS_INSTANCE_PORT, and custom attributes]
  ]
}


output "instances" {
  value = data.aws_service_discovery_instances.instances.*
}
# example response
[{
  id: "blue-one",
  creator_request_id: "",
  service_id: <service_id>,
  attributes: <attributes map of [AWS_INSTANCE_IPV4, AWS_INSTANCE_PORT, and custom attributes]>
  health_status: "Healthy"
}]

References

• Create a Data Source Provider for the "Service Discovery" Resources #14881
• New Data Sources: aws_service_discovery_service and aws_service_discovery_http_namespace  #25162

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