Create a subscription governance strategy
At the beginning of any cloud governance implementation, you identify a cloud organization structure that meets your business needs. This step often involves forming a cloud center of excellence team (also called a cloud enablement team or a cloud custodian team). This team is empowered to implement governance practices from a centralized location for the entire organization.
Teams often start their Azure governance strategy at the subscription level. There are three main aspects to consider when you create and manage subscriptions: billing, access control, and subscription limits.
Let's look at each of these aspects in more detail.
You can create one billing report per subscription. If you have multiple departments and need to do a "chargeback" of cloud costs, one possible solution is to organize subscriptions by department or by project.
Resource tags can also help. You'll explore tags later in this module. When you define how many subscriptions you need and what to name them, take into account your internal billing requirements.
A subscription is a deployment boundary for Azure resources. Every subscription is associated with an Azure Active Directory tenant. Each tenant provides administrators the ability to set granular access through defined roles by using Azure role-based access control.
When you design your subscription architecture, consider the deployment boundary factor. For example, do you need separate subscriptions for development and for production environments? With separate subscriptions, you can control access to each one separately and isolate their resources from one another.
Subscriptions also have some resource limitations. For example, the maximum number of network Azure ExpressRoute circuits per subscription is 10. Those limits should be considered during your design phase. If you'll need to exceed those limits, you might need to add more subscriptions. If you hit a hard limit maximum, there's no flexibility to increase it.
Management groups are also available to assist with managing subscriptions. A management group manages access, policies, and compliance across multiple Azure subscriptions. You'll learn more about management groups later in this module.
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