AWS Resources - Schedules

Nitric Schedules are deployed to AWS using CloudWatch Events.

AWS Resources

The following resources are created when deploying to Schedules to AWS:

• CloudWatch Event Rules
• CloudWatch Event Targets
• SNS Topics
• SNS Subscriptions
• Lambda Functions for Subscribers

Deployment

To maximize consistency between cloud providers, Schedules are implemented by Nitric in AWS using SNS Topics. The Nitric CLI builds subscribers and deploys schedules:

• SNS Topics are created for each schedule
• CloudWatch Rules with cron expressions that match the schedule definitions are created
• SNS topics are setup as targets for the events created by rules
• AWS Lambda Functions are created which will run the scheduled code
• The Lambda Functions are setup as subscribers to the SNS topics
• IAM policies are setup enabling lambdas to be triggered by topics and CloudWatch to publish events