Kubermatic machine-controller

Table of Contents

• Kubermatic machine-controller
  • Table of Contents
  • Features
    • What works
    • Supported Kubernetes versions
  • What does not work
  • Quickstart
    • Deploy the machine-controller
    • Creating a machineDeployment
  • Advanced usage
    • Specifying the apiserver endpoint
    • CA-data
    • Apiserver endpoint
      • Example cluster-info ConfigMap
  • Development
    • Testing
      • Unittests
      • End-to-End locally
  • Troubleshooting
  • Contributing
    • Before you start
    • Pull requests
  • Changelog

Features

What works

• Creation of worker nodes on AWS, Digitalocean, Openstack, Azure, Google Cloud Platform, Nutanix, VMWare Cloud Director, VMWare Vsphere, Linode, Hetzner cloud and Kubevirt (experimental)
• Using Ubuntu, Flatcar or CentOS 7 distributions (not all distributions work on all providers)

Supported Kubernetes versions

machine-controller tries to follow the Kubernetes version support policy as close as possible.

Currently supported K8S versions are:

• 1.26
• 1.25
• 1.24

What does not work

• Master creation (Not planned at the moment)

Quickstart

Deploy the machine-controller

make deploy

Creating a machineDeployment

# edit examples/$cloudprovider-machinedeployment.yaml & create the machineDeployment
kubectl create -f examples/$cloudprovider-machinedeployment.yaml

Advanced usage

Specifying the apiserver endpoint

By default the controller looks for a cluster-info ConfigMap within the kube-public Namespace. If one is found which contains a minimal kubeconfig (kubeadm cluster have them by default), this kubeconfig will be used for the node bootstrapping. The kubeconfig only needs to contain two things:

• CA-Data
• The public endpoint for the Apiserver

If no ConfigMap can be found:

CA-data

The CA will be loaded from the passed kubeconfig when running outside the cluster or from /var/run/secrets/kubernetes.io/serviceaccount/ca.crt when running inside the cluster.

Apiserver endpoint

The first endpoint from the kubernetes endpoints will be taken. kubectl get endpoints kubernetes -o yaml

Example cluster-info ConfigMap

apiVersion: v1
kind: ConfigMap
metadata:
  name: cluster-info
  namespace: kube-public
data:
  kubeconfig: |
    apiVersion: v1
    clusters:
    - cluster:
        certificate-authority-data: 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
        server: https://hfvt4dkgb.europe-west3-c.dev.kubermatic.io:30002
      name: ""
    contexts: []
    current-context: ""
    kind: Config
    preferences: {}
    users: []

Development

Testing

Unittests

Simply run make test-unit

End-to-End locally

[WIP]

Troubleshooting

If you encounter issues file an issue or talk to us on the #kubermatic channel on the Kubermatic Slack.

Contributing

Thanks for taking the time to join our community and start contributing!

Before you start

• Please familiarize yourself with the Code of Conduct before contributing.
• See CONTRIBUTING.md for instructions on the developer certificate of origin that we require.
• Read how we're using ZenHub for project and roadmap planning

Pull requests

• We welcome pull requests. Feel free to dig through the issues and jump in.

Changelog

See the list of releases to find out about feature changes.