awscdk cfnPractitioner

Tracing Terraform Failures: Mastering AWS DevOps Agent

5 min read AWS DevOps BlogOct 26, 2026Reviewed for accuracy

Practitioner — Hands-on experience recommended

In complex cloud environments, failures often cross Terraform state boundaries, complicating diagnosis. This is where AWS DevOps Agent comes into play. It helps trace failures by correlating alarms and mapping the dependency chain across state boundaries. By inspecting AWS CloudTrail, it narrows down the root cause, allowing teams to focus on the real issue instead of getting lost in the weeds.

To set up AWS DevOps Agent, you need to create an agent space and associate it with your AWS account. Use the awscc_devopsagent_agent_space resource to define your agent space, and ensure you tag it appropriately for better organization. The configuration parameters include agent_space_name for naming your space and ManagedBy to indicate the management tool. Be aware that on the first apply, you might encounter a race condition with IAM trust policy propagation, which can cause the association to fail. Simply re-running the apply usually resolves this issue. Ensure you are using Terraform 1.6.0 or later along with the appropriate provider versions for a smooth experience.

Key takeaways

→Utilize AWS DevOps Agent to trace failures across Terraform state boundaries effectively.
→Configure your agent space with proper tags to enhance project organization.
→Be prepared for potential race conditions during the first apply of your IAM role configuration.

Why it matters

In production, the ability to trace failures accurately can save hours of debugging and reduce downtime. This tool allows teams to quickly identify and resolve issues that span multiple Terraform states, improving overall system reliability.

Code examples

HCL

1resource "awscc_devopsagent_agent_space" "this" {
2  name = var.agent_space_name
3
4  tags = [
5    { key = "Project",   value = var.project },
6    { key = "ManagedBy", value = "terraform" },
7  ]
8}

HCL

1data "aws_iam_policy_document" "agent_assume_role" {
2  statement {
3    effect  = "Allow"
4    actions = ["sts:AssumeRole"]
5
6    principals {
7      type        = "Service"
8      identifiers = ["aidevops.amazonaws.com"]
9    }
10
11    condition {
12      test     = "StringEquals"
13      variable = "aws:SourceAccount"
14      values   = [local.account_id]
15    }
16
17    condition {
18      test     = "ArnEquals"
19      variable = "aws:SourceArn"
20      values   = [awscc_devopsagent_agent_space.this.arn]
21    }
22  }
23}

HCL

1resource "awscc_devopsagent_association" "account" {
2  agent_space_id = awscc_devopsagent_agent_space.this.agent_space_id
3  service_id     = "aws"
4
5  configuration = {
6    aws = {
7      account_id         = local.account_id
8      account_type       = "monitor"
9      assumable_role_arn = aws_iam_role.devops_agent.arn
10    }
11  }
12}