How does ECS Fargate manage clock sync?

Question

Hi everyone!

I've been trying to understand the clock sync mechanism on ECS with Fargate mode to know its compliance with industry controls such as ISO certifications, I found that local time is managed on the host where containers are running but with Fargate mode which could be that host?

I'm still not able to find any AWS documentation that clarifies this other than the usage of the [time sync service](https://aws.amazon.com/about-aws/whats-new/2017/11/introducing-the-amazon-time-sync-service/), this document leads to a post explaining the usage of Network Time Protocol (NTP) and how it utilizes a fleet of redundant satellite-connected and atomic reference clocks in AWS regions, which seems to be a very good explanation but is there something else that I cloud be missing when understanding Farcate clock sync?

Thanks in advance

Accepted Answer

Hello,

The clock of the container will be the same as the clock of the host that it is running on. In case of Fargate, the containers are run on AWS Managed infrastructure and therefore the containers are synced with the clock of those hosts.

As a customer, you will not have visibility into the Fargate infrastructure. However, you can monitor the clock accuracy of AWS Fargate as described in this document - https://aws.amazon.com/about-aws/whats-new/2021/09/monitoring-clock-aws-fargate-amazon-ecs/

I hope this answers your question!

How does ECS Fargate manage clock sync?

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