SOA-C02 Exam Dumps : AWS Certified SysOps Administrator - Associate (SOA-C02)

To manage scaling of EC2 instances in response to variable SQS message loads effectively:

Monitor SQS Queue Size: Utilize Amazon CloudWatch to monitor the number of visible messages in the SQS queue. This metric gives an indication of the workload that needs to be processed by the worker instances.

Metric Math Expression: Create a CloudWatch metric math expression that calculates the approximate number of messages visible per instance. This provides a more precise scaling metric, ensuring that each instance in the Auto Scaling group has a manageable load.

Target Tracking Scaling Policy: Implement a target tracking scaling policy based on this metric math expression. Configure the Auto Scaling group to automatically adjust its size to maintain a target value for the average number of SQS messages per instance. This approach ensures that the EC2 instances scale up during high traffic periods and scale down when the message load decreases.

This solution optimizes resource utilization and cost while maintaining performance by ensuring that the worker processes are neither overwhelmed nor idle.

Step-by-Step Explanation:

Understand the Problem:

Ensure all users in the organization have read-level access to a specific S3 bucket.

The data should not be accessible outside the organization.

Analyze the Requirements:

Grant read access to users within the organization.

Prevent access from outside the organization.

Evaluate the Options:

Option A: Specify "*" as the principal and PrincipalOrgId as a condition.

This grants access to all AWS principals but restricts it to those within the specified organization using the PrincipalOrgId condition.

Option B: Specify all account numbers as the principal.

This is impractical for a large organization and requires constant updates if accounts are added or removed.

Option C: Specify PrincipalOrgId as the principal.

The PrincipalOrgId condition must be used within a policy, not as a principal.

Option D: Specify the organization's management account as the principal.

This grants access only to the management account, not to all users within the organization.

Select the Best Solution:

Option A: Using "*" as the principal with the PrincipalOrgId condition ensures all users within the organization have the required access while preventing external access.

Amazon S3 Bucket Policies

AWS Organizations Policy Examples

Using "*" as the principal with the PrincipalOrgId condition efficiently grants read access to the S3 bucket for all users within the organization.

Step-by-Step Explanation:

Understand the Problem:

Share an AMI with other AWS accounts while ensuring it is encrypted with AWS KMS keys and accessible only to authorized accounts.

Analyze the Requirements:

Encrypt the AMI with a customer-managed key (CMK).

Share the AMI securely with specific AWS accounts.

Evaluate the Options:

Option A: Create a CMK and modify the key policy but do not create a copy of the AMI.

This does not re-encrypt the AMI with the CMK.

Option B: Create a CMK, modify the key policy, create a copy of the AMI, and specify the CMK.

This ensures the AMI is encrypted with the CMK and shared securely.

Option C: Create a CMK, modify the key policy, create a copy of the AMI, and make it public.

Making the AMI public does not meet the requirement of sharing with specific accounts only.

Option D: Modify the key policy of the AWS managed key and share the AMI.

AWS managed keys cannot have their key policies modified to add permissions for other accounts.

Select the Best Solution:

Option B: Creating a CMK, modifying the key policy, creating a copy of the AMI with the CMK, and specifying the permissions ensures the AMI is securely shared with specific AWS accounts.

Copying an AMI

Creating and Managing Keys

Sharing AMIs

This solution ensures the AMI is encrypted with a customer-managed key and shared securely with the specified AWS accounts.