Sending events between event buses in the same account and Region in Amazon EventBridge
You can configure EventBridge to send and receive events between event buses in the same AWS account and Region.
When you configure EventBridge to send or receive events between event buses, you use IAM roles on the sender event bus to give the sender event bus permission to send events to the receiver event bus. You use Resource-based policies on the receiver event bus to give the receiver event bus permission to receive events from the sender event bus. You can also allow or deny events from certain event buses, specific rules associated with the event bus, or events from specific sources. For more information about event bus permissions, including example policies, see Permissions for event buses in Amazon EventBridge.
The steps to configure EventBridge to send events to or receive events between event buses in your account include the following:
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To use an existing IAM role, you need to give either the sender event bus permissions to the receiver event bus or the receiver event bus permissions to the sender event bus.
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On the sender event bus, set up one or more rules that have the receiver event bus as the target and create an IAM role. For an example of the policy that should be attached to the role, see Example policy: Send events to an event bus in the same account in Amazon EventBridge.
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On the receiver event bus, edit the permissions to allow events to be passed from the other event bus.
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On the receiver event, set up one or more rules that match events that come from the sender event bus.
Note
EventBridge can't route events received from a sender event bus to a third event bus.
Events sent from one event bus to another are charged as custom events. For more
information, see Amazon EventBridge
Pricing
Creating rules that send events to a different event bus in the same AWS account and Region
To send events to another event bus, you create a rule with an event bus as a target. Specifying an event bus in the same AWS account and Region as a target is part of creating the rule.
To create a rule that sends events to a different event bus in the same AWS account and Region using the console
Follow the steps in the Creating rules that react to events in Amazon EventBridge procedure.
In the Select targets step, when prompted to choose a target type:
Select EventBridge event bus.
Select Event bus in the same AWS account and Region.
For Event bus as a target, select an event bus from the drop-down list.
Complete creating the rule following the procedure steps.
