beauholland / bicep-param-ignore-not-used

Using Bicep I want to deploy resources using a superset of parameters main.parameters.json file.

If unused parameters are present the deployment currently fails:

InvalidTemplate - Deployment template validation failed: 'The template parameters 'paramNotUsed' in the parameters file are not valid; they are not present in the original template and can therefore not be provided at deployment time. The only supported parameters for this template are 'paramUsed'.

What we want

We want to be able to use a .parameters.json file that contains a parameter that is NOT used - at least not error, or have the option to change to a warning?

One option might be adding option for tooling to: ignore, warn, error (current behaviour) if unused parameters are being passed.

Why

From an Azure DevOps Pipelines variables we want to be able to store variables in x2 places:

• Library Variable Sets using KeyVault for sensitive values
• .env.parameters.json files for all other non sensitive values

We have multiple .bicep files that require different parameters .env.parameters.json and don't require all params.

Similar post here

[Feature Suggestion] Deployment Parameters: Allow unused paramaters in deployment

Azure/bicep#5771

Steps to Repro

Requires Azure CLI https://learn.microsoft.com/en-us/cli/azure/install-azure-cli

Clone Repo

In the Azure Portal > create new resource group called "param-play" or similar

Open Terminal or command prompt

Log into Azure using your credentials

az login automatic

OR

az login --use-device-code manual

Set your subscription - if required

az account set --subscription "YOUR SUBSCRIPTION"

az deployment group what-if --resource-group "param-play" -f "main.bicep" --parameters "main.parameters.json"