Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 17 discussion

Always remember that you should associate IAM roles to EC2 instances

The correct option to meet this requirement is A: Create an IAM role that grants access to the S3 bucket and attach the role to the EC2 instances. An IAM role is an AWS resource that allows you to delegate access to AWS resources and services. You can create an IAM role that grants access to the S3 bucket and then attach the role to the EC2 instances. This will allow the EC2 instances to access the S3 bucket and the documents stored within it. Option B is incorrect because an IAM policy is used to define permissions for an IAM user or group, not for an EC2 instance. Option C is incorrect because an IAM group is used to group together IAM users and policies, not to grant access to resources. Option D is incorrect because an IAM user is used to represent a person or service that interacts with AWS resources, not to grant access to resources.

Ans. A Here's why: IAM Role: Roles are designed to be assumed by entities like EC2 instances. By creating an IAM role with the necessary permissions to access the S3 bucket and attaching this role to the EC2 instances, you ensure that the instances can securely access the S3 bucket without needing to manage long-term credentials. IAM Policy: While policies define permissions, they need to be attached to roles or users. Attaching a policy directly to EC2 instances is not possible. IAM Group: Groups are used to manage permissions for multiple users, not instances. IAM User: Users are intended for individual people or applications, not for EC2 instances. By using an IAM role, you follow AWS best practices for security and manageability. If you have any more questions or need further clarification, feel free to ask!

IAM Role + EC2 instance = go-to solution

Ans A - as per "Buruguduystunstugudunstuy" response.

Answer-A

Below is the response from Amazon Q: To access S3 from an EC2 instance, you need to create an IAM role and associate that role with the EC2 instance. Here are the basic steps: 1. Create an IAM role and attach the AmazonS3ReadOnlyAccess or AmazonS3FullAccess managed policy to grant S3 access. 2. Launch the EC2 instance and select the IAM role you created during launch. 3. The instance will now have the permissions defined in the IAM role and you can access S3 from the instance.

Strangely straight forward, Almost had me confused.

For sure

The correct option to meet this requirement is A: Create an IAM role that grants access to the S3 bucket and attach the role to the EC2 instances. An IAM role is an AWS resource that allows you to delegate access to AWS resources and services. You can create an IAM role that grants access to the S3 bucket and then attach the role to the EC2 instances. This will allow the EC2 instances to access the S3 bucket and the documents stored within it. Option B is incorrect because an IAM policy is used to define permissions for an IAM user or group, not for an EC2 instance. Option C is incorrect because an IAM group is used to group together IAM users and policies, not to grant access to resources. Option D is incorrect because an IAM user is used to represent a person or service that interacts with AWS resources, not to grant access to resources.

EC2 instances should be associated with IAM roles. Policies can be applying to users and groups can help to apply multiple roles.

Option B may work but , suggests creating an IAM policy directly and attaching it to the EC2 instances. While this might work, it's not the recommended approach. Using an IAM role is more secure and manageable.

Always remember that you should associate IAM roles to EC2 instances. An IAM role is an AWS resource that allows you to delegate access to AWS resources and services. You can create an IAM role that grants access to the S3 bucket and then attach the role to the EC2 instances. This will allow the EC2 instances to access the S3 bucket and the documents stored within it.

IAM roles should be associated to EC2 instance

Option A MET THE REQUIREMENT

Option A is the correct approach because IAM roles are designed to provide temporary credentials to AWS resources such as EC2 instances. By creating an IAM role, you can define the necessary permissions and policies that allow the EC2 instances to access the S3 bucket securely. Attaching the IAM role to the EC2 instances will automatically provide the necessary credentials to access the S3 bucket without the need for explicit access keys or secrets. Option B is not recommended in this case because IAM policies alone cannot be directly attached to EC2 instances. Policies are usually attached to IAM users, groups, or roles. Option C is not the most appropriate choice because IAM groups are used to manage collections of IAM users and their permissions, rather than granting access to specific resources like S3 buckets. Option D is not the optimal solution because IAM users are intended for individual user accounts and are not the recommended approach for granting access to resources within EC2 instances.

IAM Roles manage who/what has access to your AWS resources, whereas IAM policies control their permissions. Therefore, a Policy alone is useless without an active IAM Role or IAM User.