SOA-C02 Amazon Web Services Exam Lab Questions

To make the production environment highly available in accordance with company policy:

Database Migration: Move the MariaDB database from a single EC2 instance to Amazon RDS for MariaDB configured for Multi-AZ. This setup ensures high availability of the database with synchronous replication to a standby instance in a different Availability Zone.

Application Scalability: Deploy the application on EC2 instances within an Auto Scaling group. Configure the Auto Scaling group to operate across multiple Availability Zones to ensure that the application remains available even if one zone becomes unavailable.

Load Balancing: Place the EC2 instances behind an Elastic Load Balancer (ELB). The load balancer will distribute incoming application traffic across the multiple, geographically dispersed EC2 instances, further enhancing the availability and fault tolerance of the application.

This solution leverages AWS managed services to increase the reliability and availability of both the application and database layers, adhering to best practices for deploying critical production environments on AWS.

Using CloudFormation Stack Sets:

CloudFormation stack sets allow you to deploy CloudFormation stacks across multiple AWS accounts and regions.

Steps:

Go to the AWS Management Console.

Navigate to CloudFormation and select "StackSets."

Click on "Create StackSet."

Provide the template URL or upload a template file.

Configure the stack set options and specify the accounts and regions.

Deploy the stack set to the specified accounts and regions.

To fix the "403 Forbidden - Access Denied" error when accessing a static website hosted on Amazon S3, you need to ensure that the objects in the bucket have the appropriate permissions for public access. Here’s how to do it:

Login to AWS Management Console:

Open the Amazon S3 console at Amazon S3 Console.

Navigate to the Bucket:

In the S3 console, select the bucket hosting the static website.

Add a Bucket Policy:

Go to the Permissions tab.

Choose Bucket Policy and add the following policy to grant public read access to all objects in the bucket:

{

"Version": "2012-10-17",

"Statement": [

{

"Effect": "Allow",

"Principal": "*",

"Action": "s3:GetObject",

"Resource": "arn:aws:s3:::your-bucket-name/*"

}

]

}

Save the Policy:

After adding the policy, save the changes.

This policy ensures that all objects in the bucket are publicly accessible, resolving the 403 Forbidden error.

References:

Hosting a Static Website on Amazon S3

Bucket Policy Examples

When experiencing slow file retrieval from an EFS file system as usage increases, configuring the file system for Provisioned Throughput can improve performance.

Provisioned Throughput:

Amazon EFS offers two throughput modes: Bursting Throughput and Provisioned Throughput.

With Provisioned Throughput, you can set a fixed throughput limit for your file system independent of the amount of data stored.

Configuring Provisioned Throughput:

Go to the EFS console and select your file system.

Click on "Manage File System" and then "Edit."

Choose the "Provisioned Throughput" option and set the desired throughput limit.

Benefits:

Provisioned Throughput ensures consistent performance and is beneficial for applications with high throughput requirements.

It helps in cases where the default Bursting Throughput mode might not provide sufficient throughput during peak times.

References:

Amazon EFS Performance

Managing Amazon EFS File Systems