Which AWS key service is used to ensure reliability?

Amazon CloudWatch is the key service used to ensure reliability in AWS environments. It is designed for monitoring AWS resources and applications in real-time, enabling users to collect and track metrics, collect log files, and set alarms. By providing visibility into the operational health of applications and infrastructure, Amazon CloudWatch helps organizations ensure that their services remain reliable and performant.

Through CloudWatch, users can create alarms that trigger actions in response to metric thresholds being surpassed, such as scaling an application or notifying administrators about issues. This proactive monitoring capability allows teams to respond quickly to emerging problems, thereby maintaining service reliability. Additionally, CloudWatch integrates seamlessly with other AWS services for a comprehensive view of application health and performance.

Using Amazon CloudWatch ensures that potential issues are identified before they impact the end-users, which is essential for maintaining high availability and reliability of applications hosted in the cloud.