Let’s learn the AWS ARN full form regarding Amazon Web Services: The full form of AWS is “Amazon Web Services” and ARN is “Amazon Resource Name”. The Amazon Resource Name (ARN) is an identifier used to uniquely identify AWS resources. It is a string that follows a specific format, which includes the resource type, service namespace, and resource identifier.
For example, an ARN for an Amazon S3 bucket might look like this:
arn:aws:s3:::my-bucket
This ARN identifies the resource as an S3 bucket, and the resource identifier is “my-bucket”. ARNs are used in various AWS services to identify and authorize access to resources. They are a key part of AWS’s resource-based permissions model, which allows you to specify fine-grained access controls for AWS resources.
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What is the Full Form of AWS ARN?
AWS ARN Full Form = Amazon Web Services, Amazon Resource Name
Components of ARN
Amazon Resource Name (ARN) is a string that identifies an AWS resource. It is used to uniquely identify resources within the AWS ecosystem and is a key part of the resource-based permissions model in AWS.
ARNs have a specific format that includes the following components:
- Partition: The partition that the resource is in. For example, “aws” for resources in the global partition, and “aws-cn” for resources in the China partition.
- Service namespace: The service namespace of the resource. For example, “s3” for an Amazon S3 bucket, “ec2” for an Amazon EC2 instance, and “iam” for an IAM user.
- Region: The region where the resource is located. This is optional for some resources, such as IAM users and roles, which are not region-specific.
- Account ID: The ID of the AWS account that owns the resource.
- Resource type: The type of resource. This can be a specific resource, such as an Amazon S3 bucket or an Amazon EC2 instance, or a more general resource type, such as “user” for an IAM user or “role” for an IAM role.
- Resource identifier: A unique identifier for the resource within its resource type. For example, the name of an Amazon S3 bucket or the ID of an Amazon EC2 instance.
Here is an example of an ARN for an Amazon S3 bucket in the us-east-1 region, owned by the account with ID 123456789012:
arn:aws:s3:::my-bucket
In this example, “arn” indicates that this is an Amazon Resource Name, “aws” is the partition, “s3” is the service namespace, and “my-bucket” is the resource identifier. The region and account ID are not included because S3 buckets are not region-specific and do not have an associated account ID.
AWS ARN format
The format of an Amazon Resource Name (ARN) is:
arn:partition:service-namespace:region:account-id:resource-type/resource-identifier
Here is an example of an ARN for an Amazon S3 bucket in the us-east-1 region, owned by the account with ID 123456789012:
arn:aws:s3:us-east-1:123456789012:bucket/my-bucket
In this example:
- “arn” indicates that this is an Amazon Resource Name.
- “aws” is the partition.
- “s3” is the service namespace.
- “us-east-1” is the region.
- “123456789012” is the account ID.
- “bucket” is the resource type.
- “my-bucket” is the resource identifier.
Note that not all components of the ARN are required for every resource. For example, some resources, such as IAM users and roles, are not region-specific and do not have an associated region in their ARN. Similarly, some resources, such as Lambda functions, do not have a resource identifier and only include the resource type in their ARN.
Importance of AWS ARN
Amazon Resource Names (ARNs) are an important part of the AWS ecosystem and are used to uniquely identify AWS resources. They are used in various AWS services to identify and authorize access to resources and are a key part of AWS’s resource-based permissions model, which allows you to specify fine-grained access controls for AWS resources.
Here are some examples of how ARNs are used in AWS:
- In IAM policies: ARNs are used to specify the resources that a policy applies to. For example, you might use an ARN to allow an IAM user to access a specific Amazon S3 bucket.
- In AWS service APIs: ARNs are used to identify resources in API calls. For example, you might use an ARN to specify an Amazon EC2 instance when calling the EC2 DescribeInstances API.
- In AWS events: ARNs are used to identify the source of an event in AWS event-driven services, such as AWS Lambda and Amazon SNS.
- In AWS CloudFormation templates: ARNs are used to identify resources in AWS CloudFormation templates, which are used to automate the deployment and management of AWS resources.
Overall, ARNs are an essential part of working with AWS resources and are used in many different contexts within the AWS ecosystem.
How to get AWS ARN?
There are several ways to obtain the Amazon Resource Name (ARN) of an AWS resource. Here are a few options:
- From the AWS Management Console: You can view the ARN of a resource by going to the resource’s page in the AWS Management Console and looking for the ARN in the resource’s details. The location of the ARN may vary depending on the resource type and service.
- Using the AWS CLI: You can use the AWS CLI to retrieve the ARN of a resource by calling the appropriate AWS service’s describe or list command and specifying the resource. For example, to get the ARN of an Amazon S3 bucket, you could use the
aws s3api describe-bucketscommand and specify the name of the bucket. - Using the AWS SDKs: You can use the AWS SDKs for various programming languages to programmatically retrieve the ARN of a resource. The specific method for doing so will depend on the language and service you are using.
- From the resource itself: In some cases, the ARN of a resource may be displayed on the resource itself. For example, the ARN of an Amazon EC2 instance is displayed in the instance’s details in the AWS Management Console.
