A data resource "aws_availability_zones" "available" has not been declared in the root module.

by XDK 18. September 2019 21:45

Exception:

Error: Reference to undeclared resource
on base.tf line 65, in resource "aws_subnet" "public-subnet-a":
65: availability_zone = "${data.aws_availability_zones.available.names[0]}"
A data resource "aws_availability_zones" "available" has not been declared in
the root module.

Explanation:

The exception occurred while assigning the availability zone for a region in the terraform template.

resource "aws_subnet" "public-subnet-a" {
  vpc_id = "${aws_vpc.vpc.id}"
  map_public_ip_on_launch = true
  cidr_block = "10.0.10.0/24"
  availability_zone = "${data.aws_availability_zones.available.names[0]}"
  tags = {
  Name = "public-subnet-a:${var.labname}"
  }
}

Solution:

Add data module to get the availability zones for a region
data "aws_availability_zones" "available" {}

resource "aws_subnet" "public-subnet-a" {
  vpc_id = "${aws_vpc.vpc.id}"
  map_public_ip_on_launch = true
  cidr_block = "10.0.10.0/24"
  availability_zone = "${data.aws_availability_zones.available.names[0]}"
  tags = {
  Name = "public-subnet-a:${var.labname}"
  }
}

Tags:

Amazon Web Service | Terraform

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About the author

My name is Xavier Dilip Kumar Jayaraj having 13+ years of IT experience which includes solid experience and depth Knowledge in Application Life Cycle Management, Configuration Management, Implementation and Support using TFS on-premises and Azure DevOps. I have invested in gaining DevOps knowledege to expertise with Cloud Computing providers namely Microsoft Azure and Amazon Web Services in recent years. I am very positive to learn and adapt emerging technologies to client’s environment.

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The information provided here is based on my expreriences, troubleshooting and online/offline findings. It can be used as is on your own risk without any warranties and I impose no rights.