How Cigna Implemented a Multi-Region Centralized Alerting System on AWS
AWS Cloud Operations Blog
This article describes Cigna's implementation of a centralized multi-region alerting system called "Alarm Funnel" on AWS.
Specifically, the article covers:
- Overview of Amazon CloudWatch and the need for centralized alerting in a multi-account AWS environment
- Architecture of Alarm Funnel leveraging services like AWS Lambda, AWS Step Functions, and Amazon DynamoDB
- How Alarm Funnel handles multi-region challenges using an active/active design with a distributed locking mechanism
- Details on the DynamoDB locking table and the logic for obtaining locks across regions
- Step Function architecture for processing alarms and ensuring exactly-once delivery
- Conclusion highlighting Alarm Funnel's resilience and benefits for Cigna
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