EventBus and Schema Discover for Webhook Events

Each event type received via the Github webhook will be forwarded to an EventBridge event bus where its schema will be inferred by a discoverer and stored in a schema registry.

EventBus

The following command will create an event bus named github-actions-event-bus:

aws --region us-east-1 events create-event-bus --name github-actions-event-bus

Schema Registry

EventBridge includes the default schema registry, “discovered-schemas“, which can be accessed from the AWS console:

“Amazon EventBridge” > Schemas > “Discovered schema registry“

Our discoverer will “scan” the event bus in order to infer the event schemas before storing them in the default registry.

Discoverer

Run the following to enable the discoverer for our event bus:

aws --region us-east-1 schemas create-discoverer \
    --source-arn arn:aws:events:us-east-1:xxxxxxxxxxxx:event-bus/git-actions-event-bus \
    --description "Schema discoverer for events on github-actions-event-bus event bus"

sample output:

{
    "Description": "Schema discoverer for events on github-actions-event-bus event bus",
    "DiscovererArn": "arn:aws:schemas:us-east-1:xxxxxxxxxxxx:discoverer/events-event-bus-git-actions-event-bus",
    "DiscovererId": "events-event-bus-git-actions-event-bus",
    "SourceArn": "arn:aws:events:us-east-1:xxxxxxxxxxxx:event-bus/git-actions-event-bus",
    "State": "STARTED",
     ...
     ...
}	

The output includes:

"State": "STARTED",

This confirms schema discovery has been enabled for the Event bus.