Data sources allow Terraform to use information defined outside of Terraform, defined by another separate Terraform configuration, or modified by functions.
Using a data source
A data source is accessed via a special kind of resource known as a data resource, declared using a data block as shown below:
data "tencentcloud_availability_zones" "my_favourite_zone" {
name = "ap-guangzhou-3"
}
Referencing a data source
The syntax for referencing data from a data source is data.<TYPE>.<NAME>.<ATTRIBUTE> as shown below:
resource "tencentcloud_subnet" "app" {
...
availability_zone = data.tencentcloud_availability_zones.default.zones.0.name
...
}