CODEWITHSUNDEEP
amazon-web-servicesaws-lambda
Naxi
Naxi

Reputation: 2044

How to schedule aws lambda to run

I am having a use case where I have to run a lambda function daily between 1am -5am every 5 minutes & then 8pm-11pm every 10 mins.

What should be the cron expression for this ? Or how can we achieve this behavior.

Upvotes: 2

Views: 2705

Answers (2)

x89
x89

Reputation: 3480

As mentioned in the answer above, you can create an AWS Events Bridge Rule and set your Lambda function as the target. You can specify a rate or cron schedule expression. For example, the following expression will run your Lambda function after every ten minutes on all weekdays.

schedule = "cron(0/10 * ? * MON-FRI *)"

Note that you will also need to give your role the lambda:InvokeFunction permission so EventsBridge can trigger your Lambda function.

If you are using Terraform, here's a good tutorial for the Terraform setup for this architecture: https://medium.com/geekculture/terraform-setup-for-scheduled-lambda-functions-f01931040007

Upvotes: 1

Nahidur Rahman
Nahidur Rahman

Reputation: 815

You can achieve this by using AWS CloudWatch Events or AWS CloudWatch EventBridge.

Note that CloudWatch Events and EventBridge are the same underlying service and API, but EventBridge provides more features.

You may need to define two cron expressions for your use case. Cron expression can be as following,

cron(0/5 1-5 ? * ? *)       # 1am-5am every 5 minutes
cron(0/10 20-23 ? * ? *)    # 8pm-11pm every 10 minutes

Click on the links below to know more about cron expression. https://docs.aws.amazon.com/lambda/latest/dg/services-cloudwatchevents-expressions.html

https://docs.aws.amazon.com/eventbridge/latest/userguide/scheduled-events.html

Upvotes: 3

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