CODEWITHSUNDEEP
amazon-web-servicesserverlessserverless-architectureamazon-cloudwatch-events
Harry Daniels
Harry Daniels

Reputation: 580

AWS Eventbridge: Pattern to capture ALL events

I'd like to deploy an AWS Event Rule in Eventbridge which is triggered by all events, with no filtering whatsoever.

I've tried the following patterns with no luck.

{
source: ["*"]
}

According to the documentation you cannot leave the pattern empty. Also, any fields not included in the pattern are wildcarded meaning they can be any value.

I've read articles saying Eventbridge can replace services such as SNS and SQS but without these finer controls I don't see that happening.

Thanks

Upvotes: 21

Views: 17122

Answers (6)

san99tiago
san99tiago

Reputation: 51

For anyone that is looking for the CDK-Python version, it can be achieved with:

event_pattern=aws_events.EventPattern(
    source=aws_events.Match.prefix(""),  # Do not filter anything
)

This follows the prefix approach explained in this response (https://stackoverflow.com/a/62407802/13957271).

Upvotes: 3

Marcin
Marcin

Reputation: 239000

Based on the comments.

The solution was to use empty prefix to match all events:

{
  "source": [{
    "prefix": ""
  }]
}

Upvotes: 35

K.Novichikhin
K.Novichikhin

Reputation: 378

For CDK in TypeScript you can provide a match pattern using as any[]:

import * as cdk from 'aws-cdk-lib';

const catchAllRule = new cdk.aws_events.Rule(stack, 'CatchAllRule', {
    targets: [...],
    eventBus: ...,
    eventPattern: {
        source: [ { prefix: ''} ] as any[]
    }
});

Generates this CloudFormation:

  EventId:
    Type: AWS::Events::Rule
    Properties:
      EventBusName:
        Ref: ...
      EventPattern:
        source:
          - prefix: ""
      State: ENABLED

This works in TypeScript. In other languages you may have to use escape hatch and override the property.

References:

Relevant issues:

Upvotes: 7

yuzik
yuzik

Reputation: 1

Using serverless framework you can use the following event pattern to receive ALL events from the bus eventBusName for your account with ID accountID:

  - eventBridge:
      eventBus: arn:aws:events:${aws:region}:${aws:accountId}:event-bus/eventBusName
      pattern:
        account: ["accountID"]

Upvotes: 0

Tim Bray
Tim Bray

Reputation: 1663

My favorite was { "version": ["0"] }

Upvotes: 4

alexis-donoghue
alexis-donoghue

Reputation: 3397

You can try to use exists filter: https://docs.aws.amazon.com/eventbridge/latest/userguide/content-filtering-with-event-patterns.html#filtering-exists-matching

One caveat of using this is that it's not working properly when defined in CloudFormation, but at least it works in SDK and in console.

Upvotes: 3

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