Important Note: User data plugins for machine-controller are deprecated and will soon be removed. Operating System Manager is the successor of user data plugins. It's responsible for creating and managing the required configurations for worker nodes in a Kubernetes cluster with better modularity and extensibility. Please refer to Operating System Manager for more details.

• Kubermatic machine-controller
  • Table of Contents
  • Features
    • What Works
    • Supported Kubernetes Versions
    • Community Providers
  • What Doesn't Work
  • Quickstart
    • Deploy machine-controller
    • Creating a MachineDeployment
  • Advanced Usage
    • Specifying the Apiserver Endpoint
    • CA Data
    • Apiserver Endpoint
      • Example cluster-info ConfigMap
  • Development
    • Testing
      • Unit Tests
      • End-to-End Locally
  • Troubleshooting
  • Contributing
    • Before You Start
    • Pull Requests
  • Changelog

• Creation of worker nodes on AWS, Digitalocean, Openstack, Azure, Google Cloud Platform, Nutanix, VMWare Cloud Director, VMWare vSphere, Hetzner Cloud and Kubevirt
• Using Ubuntu, Flatcar, CentOS 7 or Rocky Linux 8 distributions (not all distributions work on all providers)

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

Currently supported K8S versions are:

• 1.27
• 1.26
• 1.25

Some cloud providers implemented in machine-controller have been graciously contributed by community members. Those cloud providers are not part of the automated end-to-end tests run by the machine-controller developers and thus, their status cannot be guaranteed. The machine-controller developers assume that they are functional, but can only offer limited support for new features or bugfixes in those providers.

The current list of community providers is:

• Linode
• Vultr
• OpenNebula

• Master creation (Not planned at the moment)

• Install cert-manager for generating certificates used by webhooks since they serve using HTTPS

kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.11.2/cert-manager.yaml

• Run kubectl apply -f examples/operating-system-manager.yaml to deploy the operating-system-manager which is responsible for managing user data for worker machines.
• Run kubectl apply -f examples/machine-controller.yaml to deploy the machine-controller.

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

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:

The Certificate Authority (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.

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

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: []

Simply run make test-unit

[WIP]

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

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

• 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

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

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