Reference on Flatcar Container Linux

Constants and IDs

Mon, 01 Jan 0001 00:00:00 +0000

This document contains well-known constants and IDs used by Flatcar Container Linux.

Omaha application ID

This UUID is used to identify Container Linux to the update service, i.e. as an appid over the Omaha protocol .

Label	Value	Notes
Container Linux	`e96281a6-d1af-4bde-9a0a-97b76e56dc57`	-

GPT partition types

These GUIDs are dedicated GPT partition types for specific Container Linux usages.

Label	Value	Notes
`coreos-usr`	`5dfbf5f4-2848-4bac-aa5e-0d9a20b745a6`	Alias for historical `coreos-rootfs`, currently used for `/usr` only
`coreos-resize`	`3884dd41-8582-4404-b9a8-e9b84f2df50e`	Support for auto-resizing via `extend-filesystems`, current default type for `/`
`coreos-reserved`	`c95dc21a-df0e-4340-8d7b-26cbfa9a03e0`	Reserved for OEM usage, support for customizations via `OEM-CONFIG` partition
`coreos-root-raid`	`be9067b9-ea49-4f15-b4f6-f36f8c9e1818`	RAID partition containing a rootfs, see notes for details and limitations

For more information on the partitioning scheme used by Flatcar Container Linux, read the disk layout documentation.

Integrations

Mon, 01 Jan 0001 00:00:00 +0000

Flatcar Container Linux users can be found here: https://github.com/flatcar/Flatcar/blob/main/ADOPTERS.md#who-is-using-flatcar . Please help us keep the list current by letting us know of other projects that use Flatcar Container Linux.

This document tracks projects that integrate with Flatcar Container Linux. Please help us keep the list current by letting us know of other projects that use Flatcar Container Linux.

Projects

Amazon Web Services : Amazon’s cloud computing solution. Offers Flatcar Container Linux.
Google Cloud Platform : Google’s cloud computing solution. Offers Flatcar Container Linux.
Microsoft Azure : Microsoft’s cloud computing solution. Offers Flatcar Container Linux.
DigitalOcean : An independent cloud computing solution. Offers Flatcar Container Linux.

Supply chain security mechanisms

Mon, 01 Jan 0001 00:00:00 +0000

Flatcar Container Linux Supply Chain Security and SLSA

The Supply Chain Levels for Software Artifacts (SLSA or ‘salsa’ for short) industry standard defines a checklist of standards and controls to prevent tampering, improve integrity, and secure packages and infrastructure in software projects. This document describes the Flatcar Container Linux project’s current and planned compliance with the requirements of SLSA and provides a deep dive into the processes and mechanisms to secure the Flatcar project supply chain.