How can the developer update the application to meet these requirements with MINIMUM changes?
Rewrite the application to be cloud native and to run on AWS Lambda, where the logs can be reviewed in Amazon CloudWatch.
Set up centralized logging by using Amazon OpenSearch Service, Logstash, and OpenSearch Dashboards.
Scale down the application to one larger EC2 instance where only one instance is recording logs.
Install the unified Amazon CloudWatch agent on the EC2 instances. Configure the agent to push the application logs to CloudWatch.
Explanations:
While moving to AWS Lambda could offer cloud-native benefits and logging in CloudWatch, it requires a significant rewrite of the application, which contradicts the requirement for minimum changes.
Setting up Amazon OpenSearch Service, Logstash, and OpenSearch Dashboards is a robust solution for centralized logging but involves considerable setup and configuration, thus not meeting the requirement for minimal changes.
Scaling down to one larger EC2 instance compromises high availability, as it introduces a single point of failure. Additionally, this option does not address the need for centralized log management.
Installing the unified Amazon CloudWatch agent on the EC2 instances allows for centralized logging by automatically pushing application logs to CloudWatch. This approach requires minimal changes to the existing application setup while maintaining high availability across multiple instances.
I scheme that the answer is:
Install the unified Amazon CloudWatch agent on the EC2 instances. Configure the agent to push the application logs to CloudWatch.