Disable and enable AWS lambda trigger programmatically

Question

Is there a way for us to disable & enable the Lambda trigger programmatically (e.g. for scheduled maintains purposes)?

Ashan · Accepted Answer · 2017-09-24 04:55:08Z

19

You can disable and enable Lambda triggers by using following approaches with Update Event Source Mapping, based on how you are going to do it.

Using AWS CLI: You can use AWS CLI update-event-source-mapping command with --enabled | --no-enabled parameters.
Using AWS SDK (E.g NodeJS): You can use AWS SDK updateEventSourceMapping method with Enabled: true || false attribute.
Using AWS REST API: You can use AWS REST API UpdateEventSourceMapping with "Enabled": boolean attributes.

Note: You need to grant relevant permission for each of the approach to execute using IAM Roles/Users or temporarily access credentials.

answered Sep 24, 2017 at 4:55

Ashan

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Kannaiyan · Accepted Answer · 2017-09-13 13:59:30Z

2

It is documented under EventSourceMapping, you specify which event arn should map to a given lambda, it will do the trigger association.

Below is the API using node js,

http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Lambda.html#createEventSourceMapping-property

Using CLI: http://docs.aws.amazon.com/cli/latest/reference/lambda/create-event-source-mapping.html

All supported languages have this API as well.

answered Sep 13, 2017 at 13:59

Kannaiyan

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3 Comments

Yuchen Over a year ago

I try using the AWSLambdaClientBuilder.defaultClient().listEventSourceMappings() and it returns an empty list. Doesn't seems like it? Or maybe it doesn't support S3 events?

Kannaiyan Over a year ago

Try the clip before you take it to code. There are other things you might be configured wrong.

Justin Kruse Over a year ago

Using EventSourceMapping won't work because those functions only work with Kinesis streams, SQS, and DynamoDB streams: see the documentation for listEventSourceMappings under the input documentation for params: docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/… I've tried to return all by not specifying a function ARN and only get those with SQS (I don't have any Kinesis or DynamoDB events), no SNS or others.

Blundell · Accepted Answer · 2020-10-10 12:56:15Z

Enable/Disable in Java:

AWSLambda client = AWSLambdaClientBuilder.standard().build();
UpdateEventSourceMappingRequest request = new UpdateEventSourceMappingRequest()
    .withUUID(uuid)
    .withFunctionName("myFunction")
    .withEnabled(true) // false to disable
    .withBatchSize(123);
UpdateEventSourceMappingResult response = client.updateEventSourceMapping(request);

In Kotlin:

val client: AWSLambda = AWSLambdaClientBuilder.standard().build()
val request: UpdateEventSourceMappingRequest = UpdateEventSourceMappingRequest()
                .withUUID(uuid)
                .withFunctionName("myFunction")
                .withEnabled(false) // true to enable
                .withBatchSize(10)
val response: UpdateEventSourceMappingResult = client.updateEventSourceMapping(request)

Dependency Needed:

implementation 'com.amazonaws:aws-java-sdk-lambda:1.11.+'

luissquall · Accepted Answer · 2022-09-27 15:00:05Z

1

All credits to @ashan, for anyone like me who would prefer to have an example of how to do it using AWS cli, replace $uuid with your trigger UUID:

# Enable lambda polling & invocation
aws lambda update-event-source-mapping --uuid  "$uuid" --enabled

# Disable it
aws lambda update-event-source-mapping --uuid  "$uuid" --no-enabled

answered Sep 27, 2022 at 15:00

luissquall

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