EventBridge Rule Controller has an Error when using ARN for EventBus Name After Initial Creation #2423
Description
Describe the bug
I am adding an event rule to one of my event busses in EventBridge via the EventBridge controller. On initial deploy, when I use an arn for the eventBusName, I'm successfully creating the EventRule as expected. If I make a change to a value and re-sync the rule, I'm getting an error
conditions:
- message: 'Immutable Spec fields have been modified: EventBusName'
status: 'True'
type: ACK.Terminal
- lastTransitionTime: '2025-04-10T19:14:05Z'
message: Resource not synced
reason: resource is in terminal condition
status: 'False'
type: ACK.ResourceSynced
Steps to reproduce
Create an event rule with a spec similar to:
spec:
eventBusName: arn:aws:events:eu-central-1:<my-account-id>:event-bus/<my-event-bus>
eventPattern: '{"detail-type":["event1","event2"]}'
name: my-event-rule
targets:
- arn: arn:aws:sqs:eu-central-1:<my-account-id>:my-queue-target
id: my-super-awesome-queue-target
On first apply, everything is fine and the resource syncs. Now lets add an event:
spec:
eventBusName: arn:aws:events:eu-central-1:<my-account-id>:event-bus/<my-event-bus>
eventPattern: '{"detail-type":["event1","event2","event3"]}'
name: my-event-rule
targets:
- arn: arn:aws:sqs:eu-central-1:<my-account-id>:my-queue-target
id: my-super-awesome-queue-target
This will give you the error:
conditions:
- message: 'Immutable Spec fields have been modified: EventBusName'
status: 'True'
type: ACK.Terminal
- lastTransitionTime: '2025-04-10T19:14:05Z'
message: Resource not synced
reason: resource is in terminal condition
status: 'False'
type: ACK.ResourceSynced
Expected outcome
Sync should be successful because I'm not changing the name of the EventBus, so it should not be trying to modify the value of that field. Something to note, I'm using the arn, not the bus name. This is based off of the schema for this prop:
/**
* The name or ARN of the event bus to associate with this rule. If you omit
* this, the default event bus is used.
*
* @schema RuleSpec#eventBusName
*/
readonly eventBusName?: string;
Environment
- Kubernetes version: 1.30
- Using EKS (yes/no), if so version? yes, eks.29
- AWS service targeted (S3, RDS, etc.) EventBridge