Which service helps in setting up monitoring and alerts in AWS?

AWS CloudWatch is the service designed specifically for monitoring resources and applications running in AWS. It provides comprehensive capabilities to collect, track, and analyze metrics on the performance and health of AWS resources and applications.

With CloudWatch, you can set up custom metrics and alarms that notify you when specific thresholds are breached, allowing for real-time monitoring. This enables users to maintain operational resilience by automatically responding to changes in resource utilization or performance. The integration of CloudWatch with other AWS services also allows for dynamic scaling and adjustments based on performance metrics, making it a fundamental tool for system administrators.

In contrast, while AWS CloudTrail tracks API calls and changes made to your AWS resources for auditing, it does not provide real-time monitoring or alert capabilities. AWS Config monitors the configuration of AWS resources but focuses primarily on compliance and changes in configurations rather than performance metrics. AWS Elastic Beanstalk is an application management service; it helps deploy and manage applications but does not inherently provide monitoring and alerting functionalities like CloudWatch does.