Feature request: Data source for available datacenters.

[james-masson]

I'd like to create a prepared query that should exist in every datacenter.

Currently there seems to be no way to retrieve the list of datacenters that Consul has available, to provide these to a configured resource.

Configuring and updating a resource manually across a set of datacenters doesn't seem ideal.

Terraform Version

v0.15.1

Terraform Configuration Files

## This is what I would like to exist...
data "consul_datacenters" "this" {
}

# This was just from your examples... not the query I'm interested in.
resource "consul_prepared_query" "myapp-query" {
  for_each = toset(  data.consul_datacenters.this.all )
  name         = "myquery"
  datacenter   = each.key
  token        = "abcd"
  stored_token = "wxyz"
  only_passing = true
  near         = "_agent"

  service = "myapp"
  tags    = ["active", "!standby"]

  failover {
    nearest_n   = 3
    datacenters = ["us-west1", "us-east-2", "asia-east1"]
  }

  dns {
    ttl = "30s"
  }
}

[remilapeyre]

Hi @james-masson, thanks for opening this issue. @Seth-Karlo made a PR to add this new datasource and it will ship in the next release that should be in a couple of days.