Running cron jobs in the cloud — Amazon EC2 vs AWS Lambda

1

Vault by HashiCorp

When running cron jobs on Amazon EC2, you can, for example, use a secrets store like Vault. With Vault, your cron jobs can dynamically get the credentials they need. The secrets don’t get stored on the machine that’s running the cron jobs, and if you change a secret, the cron jobs will automatically receive that change. The downside of implementing a solution like Vault, however, is the overhead of managing the secrets store. You’ll need to set up the store itself, maintain the underlying server and see to getting the credentials from the store and into your cron job.

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2

Serverless

AWS Lambda is taking its place as the new standard for task automation in AWS environments. When used with the Serverless framework, AWS Lambda allows you to combine a great developer experience with the advantage of only paying for what you use, saving on compute costs. Of course, Lambda has its limitations, but in a large proportion of cases it can be a solution for recurring tasks and cron jobs in the cloud that is easier to develop for, more secure, and more observable than EC2.

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3

Amazon EC2 Systems Manager

With AWS Lambda, you can use a number of off-the-shelf services to handle secrets management. You can choose between AWS SSM and AWS Secrets Manager, or you can use the Serverless Framework’s secrets management functionality to take care of secrets without additional operational overhead. Check out our article on secrets management for AWS Lambda for a comparison of these three options.

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4

AWS Secrets Manager

With AWS Lambda, you can use a number of off-the-shelf services to handle secrets management. You can choose between AWS SSM and AWS Secrets Manager, or you can use the Serverless Framework’s secrets management functionality to take care of secrets without additional operational overhead. Check out our article on secrets management for AWS Lambda for a comparison of these three options.

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