Modularization and reuse in templates

- [Instructor] As our code base grows, it's natural … to want to use components and minimize errors. … A key design principle in software development … is to create modularized code, so it makes sense … that we would want to do the same … for our IaC solutions, as well. … Let's discuss the options we have for our tools. … Terraform provides us with modules … which can be reused as part of the configurations we create. … ARM templates include nested and linked templates. … If we remember, ARM templates are JSON-based. … Let's go through the elements. … The structure of a template file begins … by specifying the schema, which targets … a resource group or a subscription deployment. … Content version is required … and specifies the template version. … API version is useful when deploying … templates in multiple environments. … This allows the resource provider … to ensure resources have the correct APIs. … Parameters and variables are similar to any language. … Functions are user-defined functions that we choose to run. …