interop-matrix.md

Flatcar inter-operation matrix

This document tracks Flatcar inter-operability across environments.

Ownership of an item implies ensuring test coverage in release tests of official Flatcar releases (L2 and above) as well as handling bugs and feature requests that affect the respective environment specifically. Please propose ownership by filing a PR for this document.

Public cloud (machines)

Environment	Full-Feature (release blocker)	Works	Tested (CI)	Owner	Reference (e.g. GH issue)	Notes
EC2	Partial	X	X	@flatcar/flatcar-maintainers		IAM 2.0 support missing
Azure	Partial	X	X	@flatcar/flatcar-maintainers		HyperV telemetry support missing; needs tracking issue
GCE	X	X	X	@flatcar/flatcar-maintainers
Digital Ocean (VMs)	X	X	X	@flatcar/flatcar-maintainers
Equinix Metal	X	X	X	@flatcar/flatcar-maintainers
ESXi / vSphere	X	X	X	@flatcar/flatcar-maintainers
Hetzner Cloud		X		[no owner]
Vultr VPS		X		[no owner]
Cloudscale		X		[no owner]
Oracle Cloud		X		[no owner]		Bring-your-own-image on OCI VMs; install via Ubuntu on OCI bare metal
Tencent				[no owner]
AliCloud				[no owner]
Yandex				[no owner]
Brightbox	X	X	X	@flatcar/flatcar-maintainers

Private Cloud (machines)

Environment	Full-Feature (release blocker)	Works	Tested (CI)	Owner	Reference (e.g. GH issue)	Notes
Azure Stack		w/ caveat		[no owner]		controller node not supported on Flatcar (cloud-init feature missing)
Tinkerbell		X		[no owner]
Rancher (VMs)		X		[no owner]
QEmu / KVM backed	X	X	X	@flatcar/flatcar-maintainers
OpenStack	X	X	X	@flatcar/flatcar-maintainers
VirtualBox		X		[no owner]
Vagrant		X		[no owner]		Isn't this plain qemu/kvm?

Managed Kubernetes

Environment	Full-Feature (release blocker)	Works	Tested (CI)	Owner	Reference (e.g. GH issue)	Notes
EKS		X		[no owner]
GiantSwarm		X		Provider

Cluster API

Environment	Full-Feature (release blocker)	Works	Tested (CI)	Owner	Reference (e.g. GH issue)	Notes
CAPB	X	X	X (upstream)	Upstream		Covered by CAPB release tests
CAPA	X	X	X (upstream)	Upstream		Covered by CAPA release tests
CAPA EKS				[no owner]
CAPZ		w/ caveat		@flatcar/flatcar-maintainers		WIP Prototype
CAPV		[no owner]
CAPM3		[no owner]
CAPG		[no owner]
CAPO		X	X (upstream)	Upstream

Kubernetes Distros

Environment	Full-Feature (release blocker)	Works	Tested (CI)	Owner	Reference (e.g. GH issue)	Notes
AKS Engine		X		[no owner]		https://kinvolk.io/blog/2020/12/supercharging-aks-engine-with-flatcar-container-linux/
Rancher (rke)		X		[no owner]
Rancher (rke2)				[no owner]
Lokomotive	X	X	X	@kinvolk/lokomotive-developers
Tanzu KG		X		[no owner]
K3s		X		[no owner]
EKS-Distro		X		[no owner]
KOPS		X		upstream
Kubematic		X		[no owner]
Gardener		X		[no owner]

Other

Please add below what does not fit into any of the categories above.

Environment	Full-Feature (release blocker)	Works	Tested (CI)	Owner	Reference (e.g. GH issue)	Notes