How is Lambda activated automatically?
Open the CloudWatch Console at https://console.aws.amazon.com/cloudwatch/.
- In the navigation pane, choose Events, Create Rule.
- For Event Source, do the following:
- For Destinations, choose Add Destination, Lambda Function.
- For Function, select the Lambda function you created.
- Choose Configure details.
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What events can trigger Lambda?
An updated list of services that can trigger asynchronous lambda from AWS:
- Amazon Simple Storage Service.
- Amazon Simple Notification Service.
- Simple email service from Amazon.
- AWS Cloud Training.
- Amazon CloudWatch logs.
- Amazon CloudWatch events.
- AWS CodeCommit.
- AWS configuration.
How do I invoke Lambda manually?
Invoke Lambda from the AWS console:
- Step 1 – Sign in to the AWS Console and navigate to ‘Lambda’.
- Step 2: Click on the name of the function.
- Step 3 – In the top right panel, click ‘Configure Test Events’.
- Step 4: Create an event for the lambda function using JSON below and click ‘Create’.
What services can Lambda call?
Here is a list of services that call Lambda functions synchronously:
- Elastic Load Balancing (Application Load Balancer)
- Amazon Cognito.
- Amazon Lex.
- Amazon Alexa.
- Amazon API Gateway.
- Amazon CloudFront ( [email protected] )
- Amazon Kinesis Data Firehose.
What does Lambda return to the caller?
Lambda sends the events directly to the function and returns the function’s response to the caller. The payload is a string that contains an event in JSON format. The name of the file where the AWS CLI writes the function’s response is response.json.
Where do I find errors in invoke-AWS Lambda?
For synchronous invocation, details about the function response, including any errors, are included in the response body and headers. For any type of invocation, you can find more information in the execution log and trace. When an error occurs, your function may be called multiple times.
How does Lambda work for asynchronous invocation?
For asynchronous invocation, Lambda adds events to a queue before dispatching them to your function. If your function doesn’t have enough capacity to keep up with the queue, events may be lost. Occasionally your function may receive the same event multiple times, even if no error is thrown.
When to return toonyrequestexception in AWS Lambda?
For example, Lambda returns TooManyRequestsException if the function execution causes it to exceed an account-level ( ConcurrentInvocationLimitExceeded ) or function-level ( ReservedFunctionConcurrentInvocationLimitExceeded ) concurrency limit.