AWS Tags – Resource Groups – Tag Editor

AWS Tags
Tags can be used to attach AWS resources to key/value pairs.
Metadata is tags. They are metadata.
Tagging allows the user to assign her own (words/phrases/labels) metadata to each resource in the form of tags.
Tags are not semantically related to the resources they are assigned and can be interpreted as a string.
AWS resources and services can be managed with tags. Images, security groups, and instances are all possible with tags.
You can categorize AWS resources in different ways. For example, by purpose, owner (Developer or Finance, etc.) or environment (DEV TEST, PROD etc.
Help filter and search for resources
can be used to organize the resource costs in the cost allocation report.
Although tags are not automatically assigned to resources, they can sometimes be inherited, for example. Services such as Auto Scaling and Elastic Beanstalk can create additional resources such as RDS instances or EC2 instances. They also tag the resource with a reference to themselves. These tags count towards the resource’s total tag limit.
The AWS Management Console allows you to define tags.
Amazon API.
Only resources that are already in existence can have tags assigned. They cannot be assigned when a resource is created, for example, when you use run-instances AWS CI command.
However, you can use the AWS Management console to create resource screens that allow you to specify tags that will be applied immediately after the resource has been created.
Each tag contains a key, valuekey, and optional value. Both can be controlled by the user.
A new tag can be created that shares the same key as an existing tag for that resource. The new value will overwrite the old value.
You can edit and remove keys and values from any resource at any time.
Value can be defined as an empty string but cannot be set to null.
IAM gives you the ability to manage which AWS account users have permission to create edit or delete tags.
Tags Restriction
Maximum number of tags per resource: 50
Maximum key length – 128 Unicode character in UTF-8
Maximum value length – 256 Unicode character in UTF-8
Case sensitive tags keys and values
The aws prefix is reserved for AWS usage. This prefix cannot be edited or removed and does not count against the tag per resource limit.
The tags allowed characters are: numbers, letters, spaces, and numbers represented in UTF-8 plus the following special characters. _ : / @.Tagging Strategy
AWS doesn’t enforce any tagging or naming conventions. It can be used as per the user’s convenience
Complex Tagging is a good option as the resource tags are limited. keyName = value1|value2|value3 or keyName = key1|value1;key2|value2EC2 Resources Tags
Instances cannot terminate, stop or delete a resource based on its tags. The resource identifier must also be specified for tags on EC2 instances
Public and shared resources can be tagged. However, the tags are only available to the AWS account that assigned them and not to other accounts sharing the resource.
All resources can be tagged. However, some resources cannot be tagged using API actions, the command line, or during creation. Cost Allocation Tags
You can use tags to organize the resource costs in the cost allocation report.
To track and categorize AWS costs, cost allocation tags can be used.
AWS generates a cost allocation report (CSV) when tags are applied to AWS resources, such as EC2 instances and S3 buckets. This report includes usage and costs aggregated using active tags.
Tags can be used to represent business categories (such cost centers, application names or owners) and organize costs across multiple services.
Allocation of costs

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