Tagging your Amazon Cloud Map resources
A tag is a label that you assign to an Amazon resource. Each tag consists of a key and an optional value, both of which you define.
Tags enable you to categorize your Amazon resources by, for example, purpose, owner, or environment. When you have many resources of the same type, 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 Amazon Cloud Map services to help you track each service's owner and stack level. We recommend that you devise a consistent set of tag keys for each resource type.
Tags are not automatically assigned to your resources. After you add a tag, you can edit tag keys and values or remove tags from a resource at any time. If you delete a resource, any tags for the resource are also deleted.
Tags don't have any semantic meaning to Amazon Cloud Map and are interpreted strictly as a string of characters. You can set the value of a tag to an empty string, but 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.
You can work with tags using the Amazon Web Services Management Console, the Amazon CLI, and the Amazon Cloud Map API.
If you're using Amazon Identity and Access Management (IAM), you can control which users in your Amazon account have permission to create, edit, or delete tags.
How resources are tagged
You can tag new or existing Amazon Cloud Map namespaces and services.
If you're using the Amazon Cloud Map console, you can apply tags to new resources when they are created or to existing resources at any time using the Tags tab on the relevant resource page.
If you're using the Amazon Cloud Map API, the Amazon CLI, or an Amazon SDK, you can apply tags to new resources using the
tags parameter on the relevant API action or to existing resources using the TagResource API action. For more
information, see TagResource.
Some resource-creating actions enable you to specify tags for a resource when the resource is created. If tags cannot be applied during resource creation, the resource creation process fails. This ensures that resources you intended to tag on creation are either created with specified tags or not created at all. If you tag resources at the time of creation, you don't need to run custom tagging scripts after resource creation.
The following table describes the Amazon Cloud Map resources that can be tagged, and the resources that can be tagged on creation.
Tagging support for Amazon Cloud Map resources | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Resource | Supports tags | Supports tag propagation | Supports tagging on creation (Amazon Cloud Map API, Amazon CLI, Amazon SDK) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Amazon Cloud Map namespaces |
Yes |
No. Namespace tags don't propagate to any other resources associated with the namespace. |
Yes |
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|
Amazon Cloud Map services |
Yes |
No. Service tags don't propagate to any other resources associated with the service. |
Yes |
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Restrictions
The following basic restrictions apply to tags:
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Maximum number of tags for each resource – 50
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For each resource, each tag key must be unique, and each tag key can have only one value.
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Maximum key length – 128 Unicode characters in UTF-8
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Maximum value length – 256 Unicode characters in UTF-8
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If your tagging schema is used across multiple Amazon services and resources, remember that other services might have restrictions on allowed characters. Generally allowed characters are letters, numbers, spaces representable in UTF-8, and the following characters: + - = . _ : / @.
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Tag keys and values are case sensitive.
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Don't use
aws:,AWS:, or any upper or lowercase combination of such as a prefix for either keys or values, as it is reserved for Amazon use. You can't edit or delete tag keys or values with this prefix. Tags with this prefix don't count against your tags-per-resource limit.