Terraform’s external data source is a useful escape hatch when you need to call out to a script to fetch data that isn’t available via a provider. However, it comes with a sharp edge that often catches people out: Terraform expects the result to be a flat map of string → string values. If yourContinueContinue reading “Returning Complex Objects from Terraform External Data Sources”
Category Archives: Infrastructure as Code
Deploying Azure Purview with Terraform: Overcoming AzureRM Limitations
Microsoft shifted the Azure Purview to be Tenant aligned, but the AzureRM Provider hasn’t made that move yet, so if you are deploying your Azure infrastructure using Terraform you need to do some alternative changes to get it to work, especially when you’re trying to deploy Purview securely using private networking. After a few painfulContinueContinue reading “Deploying Azure Purview with Terraform: Overcoming AzureRM Limitations”
How to Secure Your Terraform State File in Azure
Terraform has become the standard for managing cloud infrastructure, and with good reason. It provides consistent, repeatable deployments and integrates with almost every cloud provider. But there’s one piece that’s often overlooked until it causes problems: the Terraform state file. Your terraform.tfstate file is more than just metadata — it’s the single source of truthContinueContinue reading “How to Secure Your Terraform State File in Azure”
Implementing Test-Driven Development with Terraform
Test-driven development (TDD) isn’t just for application code anymore; Terraform has a native testing framework that lets you plan/apply infrastructure from tests, make assertions in HCL, and even run post-deployment checks that behave like smoke tests. In this post I’ll show you how to do TDD with Terraform (TTD), when to use plan vs applyContinueContinue reading “Implementing Test-Driven Development with Terraform”
Managing Azure API Versions Dynamically Using Terraform
When developing APIs for consumption from many callers you can’t just throw in new major or minor updates without impacting how they are calling the API. Doing this can cause major issues so you would normally develop APIs in things like Azure Web Applications with versioning. The callers of the APIs can then reference theseContinueContinue reading “Managing Azure API Versions Dynamically Using Terraform”
Validating Azure APIM in CI: A Practical Approach to Safe API Deployments
When deploying any code you want to validate it as much as you can before deploying. However with APIs in the APIM you can’t validate the XML Policy or the API logic until it is deployed into the API Management Service (APIM). This means you are limited to the options to validate the code, beforeContinueContinue reading “Validating Azure APIM in CI: A Practical Approach to Safe API Deployments”
Manage Complex Terraform Lists and Maps in a CSV Format
When developing some resource in Terraform you develop a large complex map or list of entries. This can become hard to manage, difficult to read and worst to maintain. An easier method is to convert these items into a Comma Separated Values (CSV) file. This will condense something that could be 100’s of lines down toContinueContinue reading “Manage Complex Terraform Lists and Maps in a CSV Format”
Best Practices for Terraform Module Testing and Validation
Terraform Modules are great for isolated components you can reuse and plug-in to your main Infrastructure as Core code base. They can then also be shared and used by multiple other teams at the same time to reduce repeated code, complexity and increase compliance. However, as they are isolated, they are harder to test, maintainContinueContinue reading “Best Practices for Terraform Module Testing and Validation”
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