Tag an Amazon ECR Public repository - Amazon ECR Public
Tag basicsTagging your resources

Tag an Amazon ECR Public repository

To help you manage your Amazon ECR Public repositories, you can optionally assign your own metadata to each repository by using tags. This topic provides an overview about tags and how to create them.

Tag basics

A tag is a label that you assign to an AWS resource. Each tag consists of a key and an optional value. You define both of them.

You can use tags to categorize your AWS resources in different ways, for example, by purpose, owner, or environment. This is useful when you have many resources of the same type. This is because you can quickly identify a specific resource based on the tags you've assigned to it. For example, you can define a set of tags for your account's Amazon ECR Public repositories to track each repository's owner.

We recommend that you devise a set of tag keys that meets your specific needs. Using a consistent set of tag keys can help you keep better track of your resources and find specific resources quickly. That is, you can search and filter the resources based on the specific tags that you add.

Tags don't have any semantic meaning to Amazon ECR and are interpreted strictly as a string of characters. Tags aren't automatically assigned to your resources. You can edit tag keys and values, and you can remove tags from a resource at any time. You can set the value of a tag to an empty string. However, you can't set the value of a tag to null. If you add a tag that has the same key as an existing tag on that resource, the new value overwrites the old value. If you delete a resource, any tags for the resource are also deleted.

You can work with tags using the AWS Management Console, the AWS CLI, and the Amazon ECR Public API.

If you're using AWS Identity and Access Management (IAM), you can control which users in your AWS account have permission to manage tags.

Tagging your resources

You can tag new or existing Amazon ECR Public repositories.

If you're using the Amazon ECR console, you can apply tags to new resources when they're created or to existing resources by using the Tags option on the navigation pane at any time.

If you're using the Amazon ECR Public API, the AWS CLI, or an AWS SDK, you can apply tags to new repositories using the tags parameter on the CreateRepository API action or use the TagResource API action to apply tags to existing resources. For more information, see TagResource.

Additionally, if tags can't be applied when a repository is created, the repository creation process is rolled back. This ensures that repositories are either created with tags or not created at all and that no repositories are left untagged at any time. By tagging repositories when they're created, you eliminate the need to run custom tagging scripts after the repository is created.