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Operating system

Support matrix

Cloud provider

Ubuntu Container Linux CentOS Flatcar RHEL SLES Amazon Linux 2
AWS ✓ ✓ ✓ ✓ ✓ ✓ ✓
Azure ✓ ✓ ✓ ✓ ✓ x x
Digitalocean ✓ ✓ ✓ x x x x
Google Cloud Platform ✓ ✓ x x ✓ x x
Hetzner ✓ x ✓ x x x x
Packet ✓ ✓ ✓ x x x x
Openstack ✓ ✓ ✓ x ✓ x x

Configuring a operating system

The operating system to use can be set via machine.spec.providerConfig.operatingSystem. Allowed values:

  • amzn2
  • centos
  • rhel
  • sles
  • ubuntu

OS specific settings can be set via machine.spec.providerConfig.operatingSystemSpec.

Supported OS versions

Note that the table below lists the OS versions that we are validating in our automated tests. Machine controller may work with other OS versions that are not listed in the table but support won’t be provided.

Versions
AmazonLinux2 2.x
CentOS 7.4.x, 7.6.x, 7.7.x
RHEL 8.0, 8.1
SLES SLES 15 SP1
Ubuntu 18.04 LTS

Ubuntu

apiVersion: "cluster.k8s.io/v1alpha1"
kind: MachineDeployment
metadata:
  name: machine1
  namespace: kube-system
spec:
  paused: false
  replicas: 1
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  minReadySeconds: 0
  selector:
    matchLabels:
      foo: bar
  template:
    metadata:
      labels:
        foo: bar
    spec:
      providerConfig:
        value:
          ...
          operatingSystem: "ubuntu"
          operatingSystemSpec:
            # do a apt-get dist-upgrade on start and reboot if required
            distUpgradeOnBoot: true

Container Linux

apiVersion: "cluster.k8s.io/v1alpha1"
kind: MachineDeployment
metadata:
  name: machine1
  namespace: kube-system
spec:
  paused: false
  replicas: 1
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  minReadySeconds: 0
  selector:
    matchLabels:
      foo: bar
  template:
    metadata:
      labels:
        foo: bar
    spec:
      providerConfig:
        value:
          ...
          operatingSystem: "flatcar"
          operatingSystemSpec:
            # disable auto update
            disableAutoUpdate: true

CentOS

apiVersion: "cluster.k8s.io/v1alpha1"
kind: MachineDeployment
metadata:
  name: machine1
  namespace: kube-system
spec:
  paused: false
  replicas: 1
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  minReadySeconds: 0
  selector:
    matchLabels:
      foo: bar
  template:
    metadata:
      labels:
        foo: bar
    spec:
      providerConfig:
        value:
          ...
          operatingSystem: "centos"