aws_instance: resolve:ssm:/ ami not working in combination w/ root_block_device #43488
Description
Terraform and AWS Provider Version
# terraform version
Terraform v1.12.2
on linux_amd64
+ provider registry.opentofu.org/hashicorp/aws v6.4.0
+ provider registry.terraform.io/hashicorp/aws v6.4.0Affected Resource(s) or Data Source(s)
resource "aws_instance"
...terraform config...
Expected Behavior
The ami should be looked up in ssm and instance created. This is what happens when there is no root_block_device definition.
Actual Behavior
Getting the following error:
Error: collecting instance settings: operation error EC2: DescribeImages, https response error StatusCode: 400, RequestID: c4fdfe66-6f8e-4f9e-933e-869698dda468, api error InvalidAMIID.Malformed: Invalid id: "resolve:ssm:/aws/service/canonical/ubuntu/server-minimal/24.04/stable/current/amd64/hvm/ebs-gp3/ami-id" (expecting "ami-...")Relevant Error/Panic Output
07:51:23.972 STDOUT terraform: module.ec2_instance.aws_instance.this: Creating...
07:51:25.569 STDERR terraform: ╷
07:51:25.569 STDERR terraform: │ Error: collecting instance settings: operation error EC2: DescribeImages, https response error StatusCode: 400, RequestID: c4fdfe66-6f8e-4f9e-933e-869698dda468, api error InvalidAMIID.Malformed: Invalid id: "resolve:ssm:/aws/service/canonical/ubuntu/server-minimal/24.04/stable/current/amd64/hvm/ebs-gp3/ami-id" (expecting "ami-...")
07:51:25.569 STDERR terraform: │
07:51:25.569 STDERR terraform: │ with module.ec2_instance.aws_instance.this,
07:51:25.569 STDERR terraform: │ on ../../../../modules/aws/ec2_instance/1.0/main.tf line 16, in resource "aws_instance" "this":
07:51:25.570 STDERR terraform: │ 16: resource "aws_instance" "this" {
07:51:25.570 STDERR terraform: │
07:51:25.570 STDERR terraform: ╵
07:51:25.969 STDOUT terraform: Releasing state lock. This may take a few moments...
07:51:26.103 ERROR terraform invocation failed in .
07:51:26.103 ERROR error occurred:
* Failed to execute "terraform apply" in .
╷
│ Error: collecting instance settings: operation error EC2: DescribeImages, https response error StatusCode: 400, RequestID: c4fdfe66-6f8e-4f9e-933e-869698dda468, api error InvalidAMIID.Malformed: Invalid id: "resolve:ssm:/aws/service/canonical/ubuntu/server-minimal/24.04/stable/current/amd64/hvm/ebs-gp3/ami-id" (expecting "ami-...")Sample Terraform Configuration
Click to expand configuration
resource "aws_instance" "this" {
ami = "resolve:ssm:/aws/service/canonical/ubuntu/server-minimal/24.04/stable/current/amd64/hvm/ebs-gp3/ami-id"
instance_type = "t3a.small"
subnet_id = data.aws_subnet.main.id
associate_public_ip_address = true
root_block_device {
volume_type = "gp3"
volume_size = 10
tags = {
"Name" = "root"
}
}
}
Steps to Reproduce
terraform init
terraform apply
Debug Logging
Click to expand log output
GenAI / LLM Assisted Development
n/a
Important Facts and References
when root_block_device block is ommited, all works as expected:
resource "aws_instance" "this" {
ami = "resolve:ssm:/aws/service/canonical/ubuntu/server-minimal/24.04/stable/current/amd64/hvm/ebs-gp3/ami-id"
instance_type = "t3a.small"
subnet_id = data.aws_subnet.main.id
associate_public_ip_address = true
}
...terraform config...Would you like to implement a fix?
No