AWS Lambda
Developer Guide

Step 1: Create a Lambda Function

  1. Sign in to the AWS Management Console and open the AWS Lambda console at

  2. Choose Create a Lambda function.

  3. In Select blueprint, choose the lambda-canary blueprint.

  4. In Configure triggers:

    • Choose CloudWatch Events - Schedule.

    • In Rule name, type a name (for example, CheckWebsiteScheduledEvent).

    • In Rule description, type a description (for example, CheckWebsiteScheduledEvent trigger).

    • In Schedule expression, specify rate(1 minute). Note that you can specify the value as a rate or in the cron expression format. All schedules use the UTC time zone, and the minimum precision for schedules is one minute.


      When setting a rate expression, the first execution is immediate and subsequent executions occur based on the rate schedule. In the preceding example, the subsequent execution rate would be every minute.

      For more information on expressions schedules, see Schedule Expressions Using Rate or Cron.


    • In Enable trigger, we recommend that you leave the trigger in a disabled state until you have tested it.

    • Choose Next.

  5. In Configure function, do the following:

    • Specify your Lambda function name (for example, CheckWebsitePeriodically).

    • In Runtime, specify Python3.6, Python 2.7, Node.js 6.10 or Node.js 4.3, depending on your preferred language.

    • Review the code provided by the template. Later in this tutorial, you will update the function code so that the function will return an error. You can either specify a non-existing URL or replace search text to a string that is not on the page.

    • In Role*, choose Create new role from template(s).

    • In Role name, type a name for the role.

    • In Policy templates, Lambda provides a list of optional, additional templates that extend the basic Lambda permissions. For the purpose of this tutorial, you can leave this field blank because your Lambda function already has the basic execution permission it needs.

    • In Advanced settings, leave the default configurations and choose Next.

  6. In Review, review the configuration and then choose Create Function.

Next Step

Step 2: Test the Lambda Function (Using a Sample Test Event)

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