Which Azure resources benefit most from this analyzer?

Resources with extensive Set-type attributes such as Application Gateway, Load Balancer, Firewall, Front Door, and Network Security Groups (NSG).

Can this be integrated into a CI/CD pipeline?

Yes, it is specifically designed to help automate the filtering of plan outputs in CI/CD to prevent unnecessary manual review of spurious changes.

Does this skill require specific Python dependencies?

No, the analyzer is built to run on Python 3.8+ using only the standard library, ensuring compatibility across most environments.

How do I generate the necessary input for this skill?

Run 'terraform plan -out=plan.tfplan' followed by 'terraform show -json plan.tfplan' to create the JSON file required for analysis.

What is a false-positive diff in Terraform?

A false-positive diff occurs when Terraform flags a resource for modification because the internal order of elements in a Set has changed, even though the configuration values remain identical.

Terraform AzureRM Set Diff Analyzer

Name: Terraform AzureRM Set Diff Analyzer
Author: MoonAxis

byMoonAxis

•

Cloud Infrastructure

Analyzes Terraform plan JSON for the AzureRM provider to filter out false-positive diffs caused by Set-type attribute reordering.

The Terraform AzureRM Set Diff Analyzer is designed to solve the common 'noise' problem in Azure infrastructure deployments where Terraform flags resources as changed due to internal ordering shifts in Set-type attributes. By parsing the JSON output of a terraform plan, this skill distinguishes between genuine configuration changes and spurious diffs in complex resources like Application Gateways, Network Security Groups, and Load Balancers. This allows developers and DevOps engineers to focus on actual infrastructure modifications, reducing review fatigue and improving the reliability of CI/CD pipelines.

Key Features

01Supports complex Azure resources including Application Gateway and NSGs

02Parses standard Terraform plan JSON output for deep analysis

03Streamlines plan reviews by isolating actual resource modifications

04Identifies false-positive diffs in Set-type attributes

05Lightweight execution using Python standard libraries

062 GitHub stars

Use Cases

01Automating Terraform plan verification in CI/CD pipelines

02Reviewing complex Azure Application Gateway changes without reordering noise

03Auditing Network Security Group rule updates to ensure only intended changes are present

Key Features

01Supports complex Azure resources including Application Gateway and NSGs

02Parses standard Terraform plan JSON output for deep analysis

03Streamlines plan reviews by isolating actual resource modifications

04Identifies false-positive diffs in Set-type attributes

05Lightweight execution using Python standard libraries

062 GitHub stars

Use Cases

01Automating Terraform plan verification in CI/CD pipelines

02Reviewing complex Azure Application Gateway changes without reordering noise

03Auditing Network Security Group rule updates to ensure only intended changes are present