Costing and Resource Tagging

• tag is a label assigned to AWS resource.
• tag consists of a key and an optional value, define by you.
• Used to categorize AWS resources by purpose/owner/environment.
• useful to quickly identify a specific resource based on assigned tags
• tagging can also be used for better cost allocation.
• With AWS IAM can control which users have permission to create, edit, or delete tags
• work with tags using
  • the AWS Management Console
  • the AWS CLI
  • the Amazon EC2 API
• Tag Restrictions
  • Maximum number of tags per resource – 50
  • For each resource, each tag key must be unique, and each tag key can have only one value.
  • Maximum key length – 128 Unicode characters in UTF-8
  • Maximum value length – 256 Unicode characters in UTF-8
  • Tag keys and values are case-sensitive.

Example – tags assigned to instances

• one tag with key Owner
• another with key Stack
• Each tag also has an associated value.

Resource Tagging

• Help track expenses throughout the model.
• Some of the tags are
  • Owner – Used to identify who is responsible for the resource
  • Cost Center/Business Unit – Used to identify the cost center or business unit associated with a resource; typically for cost allocation and tracking
  • Customer – Used to identify a specific client that a particular group of resources serves
  • Project – Used to identify the project(s) the resource supports
• Activate an AWS-generated createdBy tag
• Tag is automatically applied for cost allocation purposes
• Tag helps account for resources that might otherwise go uncategorized.
• The createdBy tag is available for supported AWS services and resources only
• Tag value contains data associated with specific API or console events.