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Terraform Data Source for AWS VPC Not Returning Expected CIDR Blocks

šŸ‘€ Views: 18 šŸ’¬ Answers: 1 šŸ“… Created: 2025-06-07
terraform aws vpc data-source HCL

I'm testing a new approach and I'm deploying to production and I tried several approaches but none seem to work... I am trying to retrieve the CIDR blocks of a specific VPC in AWS using the `aws_vpc` data source in Terraform, but I am not getting the expected results. My configuration looks like this: ```hcl provider "aws" { region = "us-west-2" } data "aws_vpc" "my_vpc" { id = "vpc-abc12345" } output "vpc_cidr" { value = data.aws_vpc.my_vpc.cidr_block } ``` When I run `terraform apply`, I am getting the output: `vpc_cidr = <null>`. I've double-checked the VPC ID, and it's correct. I also confirmed that the VPC exists in the AWS Management Console. To troubleshoot, I've tried adding a `terraform plan` and noticed this warning: `Warning: The vpc-abc12345 does not appear to be a valid VPC ID.` I verified the VPC ID format and it seems accurate, matching the expected format. I've also tried using the `filter` argument to query the VPC by tags, but that didn't yield better results: ```hcl data "aws_vpc" "my_vpc_by_tag" { filter { name = "tag:Name" values = ["my-vpc-name"] } } ``` Still no success. I’m using Terraform version 1.3.0, and my AWS provider version is 4.1.0. Is there a known scenario with the AWS provider regarding data sources, or is there something wrong with my configuration? Any help would be appreciated! Is there a better approach? This is part of a larger API I'm building. Any help would be greatly appreciated! This issue appeared after updating to Hcl latest. Thanks for your help in advance! The stack includes Hcl and several other technologies.