What is required to ensure multiple Azure resources are deployed consistently?

To ensure multiple Azure resources are deployed consistently, creating a single deployment template is a fundamental approach. By utilizing a deployment template, which typically comes in the form of an Azure Resource Manager (ARM) template, you can define the infrastructure and configuration for several resources in a single file. This ensures that all resources are set up in the same way, with consistent parameters, configurations, and dependencies, which minimizes the chances of errors that might occur due to manual setup.

This method also allows for the deployment of resources in a repeatable and predictable manner. You can use this template whenever you need to provision the same resources, whether it’s in a development, testing, or production environment, ensuring that every deployment maintains the same structure and settings as defined in the template.

The other methods mentioned may support deployment consistency to some extent, but they do not guarantee it as effectively as a well-defined deployment template. For example, Azure Automation can help with automating deployment processes, but it may not ensure the same consistency without controlling the specifics within the automation scripts. Azure Policies are useful for enforcing rules on resource properties but do not themselves deploy resources. Diagnostic settings are important for monitoring and logging but do not affect how resources are deployed.