🍾🚀 Bottlerocket OS as Cluster Host OS

[Gary-H9]

User Story

As a… administrator of the EKS Cluster in Modernisation Platform
I want to have the best possible host OS for the EKS cluster to run on
So that… I provide maximum value

Value / Purpose

By default we could use Amazon Linux but Bottlerocket offers many benefits which are listed here.

Useful Contacts

Gary Henderson, Jacob Woffenden

User Types

No response

Hypothesis

No response

Proposal

No response

Additional Information

Amazon Linux:

• Versatility: General-purpose OS, suitable for a wide range of applications and services.
• Customisation: Offers more flexibility for installing software and making configuration changes.
• Management: Supports traditional management methods like SSH, more familiar to system administrators.
• Compatibility: Well-supported and compatible with a wide range of software and services.
• Performance: May not be as optimised for container workloads as Bottlerocket.

Bottlerocket OS:

• Purpose-Built: Designed specifically for running containers, making it a good fit for EKS.
• Security: Offers enhanced security features, including read-only root filesystem and eBPF-based networking.
• Performance: Optimised for high performance and reduced resource usage, beneficial for containerised applications.
• Updates: Supports atomic updates, reducing the risk of update failures.
• Management: Requires container orchestrators like EKS for management, not suitable for direct SSH access or customisation.

Definition of Done

• Use bottlerocket OS for the Cluster Host images

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