Resource tags

Resource tags are used to provide metadata or descriptive information for Azure resources; metadata is a way to describe data; think of it like a sticky note, comments in a document, or a tooltip – a sticky label that provides further information on the object it is describing. This is why it's called a tag.

Resource tags can be created via the Azure portal, PowerShell, the Azure CLI, ARM templates, or the REST API; they can also be managed via Azure Policy (which we will cover in the Azure Policy section of this chapter). Up to 15 resource tags for each resource can be created, and there is no automatic inheritance by resources; if a tag is set at the resource group level, the resource tag only applies to the resource it is attached to; this may be useful if we want to group things logically by a resource group, but have a way to independently label the resource with metadata that is not tied to a resource group or subscription.

Each resource tag consists...