With CloudWatch, you can collect metrics, logs, and events, providing visibility into your system's performance and health. In this Guidance, a CloudWatch alarm monitors the Amazon SQS dead-letter queue depth, alerting when the configured threshold is exceeded. Alarms can trigger automated actions when thresholds are breached. These services support operational excellence by automating monitoring, issue detection, and change auditing, improving operational processes.

AWS KMS allows you to create and manage cryptographic keys used for data encryption. In this architecture, AWS KMS encrypts all messages stored in the Amazon SQS queue. Secrets Manager securely stores sensitive information like Salesforce credentials and connection secrets, helping manage access to applications and resources.

AWS KMS stores multiple encrypted copies of your keys in systems designed for 99.999999999% durability. AWS maintains multiple copies of the encrypted keys, providing high durability and ensuring keys are accessible when needed.

EventBridge is a serverless event bus service, eliminating the need to provision hardware or software for additional jobs. By using serverless services like EventBridge, your workloads can scale seamlessly without you having to managing instances, so you can instead focus on building applications instead of managing infrastructure.

For serverless services like EventBridge, you only pay for what you use. Serverless computing allows you to run compute resources only when needed, eliminating the need to pay for idle capacity.

EventBridge minimizes the need for physical infrastructure, reducing overall resource consumption. Using serverless services helps lower carbon emissions compared to running on-premises with physical servers and hardware.