EventBridge

• Formerly known as CloudWatch Events

• Schedule: Cron jobs (scheduled scripts)

• Event Pattern: Event rules to react to a service doing something

• Trigger Lambda functions, send SQS/SNS messages…

EventBridge – Event Bus

• An event bus receives events from sources, evaluates them using rules, and routes them to the appropriate targets.

• Types of event buses:

  • Default event bus: Receives events from AWS services

  • Custom event bus: Receives events from custom applications and services

  • Partner event bus: Receives events from an event source created by a SaaS partner

• Event buses support cross-account access

• Cron Jobs: when creating an EB rule, we can select “Schedule” instead of event pattern to trigger an event based on a cron expression.

• Can archive events (all or based on a filter) sent to an event bus to replay later

• EventBridge is recommended for decoupling applications that reacts to events from third-party SaaS applications.

EventBridge – Schema Registry

• Defines how the data is structured in the event bus

• Schema can be versioned

EventBridge – Resource-based Policy

• Manage permissions for a specific Event Bus

• Example: allow/deny events from another AWS account or AWS region

• Use case: aggregate all events from your AWS Organization in a single AWS account or AWS region