aws_ec2_instance_type_offerings should have an attribute for location_types and locations

[robomon1]

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Terraform CLI and Terraform AWS Provider Version

Terraform v0.13.3

• provider registry.terraform.io/-/aws v3.7.0
• provider registry.terraform.io/hashicorp/aws v3.7.0

Affected Resource(s)

aws_ec2_instance_type_offerings

Terraform Configuration Files

terraform {
  required_version = "~> 0.13.3"
}

provider "aws" {
  region = "us-west-2"
}

# Get all available availability zones
data "aws_availability_zones" "available" {
  state = "available"
}

output "zone_names" {
  value = data.aws_availability_zones.available.names
}
output "zone_ids" {
  value = data.aws_availability_zones.available.zone_ids
}

# We want only the availability zones where t2.micro is supported
data "aws_ec2_instance_type_offerings" "az" {
  filter {
    name   = "instance-type"
    values = ["t2.micro"]
  }

  location_type = "availability-zone"
}

# We can get instance_types attribute
output "location_types" {
  value = data.aws_ec2_instance_type_offerings.az.instance_types
}

# But what we really want is a locations attribute which gives me
# just the locations supported by the instance types as shown by the
# aws cli for describe-instance-type-offerings.  There are 4 availability
# zones but ony 3 of them support t2.micro

# aws ec2 describe-instance-type-offerings --location-type availability-zone \
#            --filters Name=instance-type,Values=t2.micro \
#            --region us-west-2
# {
#     "InstanceTypeOfferings": [
#         {
#             "InstanceType": "t2.micro",
#             "LocationType": "availability-zone",
#             "Location": "us-west-2b"
#         },
#         {
#             "InstanceType": "t2.micro",
#             "LocationType": "availability-zone",
#             "Location": "us-west-2a"
#         },
#         {
#             "InstanceType": "t2.micro",
#             "LocationType": "availability-zone",
#             "Location": "us-west-2c"
#         }
#     ]
# }

Debug Output

Panic Output

Expected Behavior

I expect to get all the attributes including LocationTypes and Locations from the datasource

Actual Behavior

There is no way to get to the LocationTypes and Locations data returned by an aws_ec2_instance_type_offering datasource.

Steps to Reproduce

1. terraform init
2. terraform apply

Important Factoids

I'm using us-west-2 because the t2.micro is only supported in us-west-2a, us-west-2b, and us-west-2c but there is also a us-west-2d az

[mjulianotq]

I've submitted PR #17794 which adds these fields to the data. Please go give it a thumbs up if you want this feature.

I have need of the feature to dynamically choose which availability zones are used in a cluster based on the instance type chosen for the cluster. Right now, I'm just crossing my fingers that the first 2 randomly chosen AZs support my chosen instance type, and if they don't, deleting and trying again. The instance type I've been testing with is supported in all but one of the AZs in us-east-1, which has been fine for testing, but I'm nearing production on my module, so I need this badly enough to do it myself.

[ewbankkit]

Closed via #16704.

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