How to Use AWS IAM Role on AWS EKS PODs

Using a native-AWS way to use an AWS IAM Role in an EKS POD, without using third-party software. Reducing the latency, and improving your EKS security. Build, Deploy, and Manage Websites, Apps or Processes On AWS' Secure, Reliable Network. Sign Up for a Free Account & Experience AWS' Secure, Reliable, Scalable...

A native-AWS way to attach an IAM role into the Kubernetes POD, without third-party software, reducing latency and improving your EKS security.

How It Works

It’s possible to attach an IAM role in a Kubernetes POD without using third-party software, such as kube2iam and kiam. This is thanks to the integration between AWS IAM and Kubernetes ServiceAccount, following the approach of IAM Roles for Service Accounts (IRSA).

Benefits

There are quite a few benefits of using IRSA with Kubernetes PODs.

• Granular restriction (per cluster, per namespace, etc.).
• It’s also possible to not use it.
• More flexible than the other tools.
• One less point of failure (maybe a few less).
• Lesser resource consumption.
• More pods per node.
• Latency may reduce by ~50ms.
• Especially for the first request.
• Prevent issues with caching the credentials.
• This software takes a few minutes to update its cache.
• Better auditing.
• Instead of checking the logs of kube2iam/kiam pods, you can check AWS CloudTrails.
• Easier to set up.
• AWS provides full support.

Pre-requirements

There are a few pre-requirements that you’ll need to attempt in order to use the IAM role in a POD.

• An IAM OpenID Connect provider pointing to the AWS EKS OpenID Connect provider URL.
• AWS EKS cluster 1.13 or above.
• A trust relationship between your IAM Role and the OpenID Provider.

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