machine-controller

README

Generic machine controller

Table of Contents

• Features
• Running
  • Requirements
  • Creating a machine
• Cloud provider
• Operating system
• Container runtimes
• Development

Features

What works

• Creation of worker nodes on AWS, Digitalocean, Openstack, Azure and Hetzner cloud
• Using Ubuntu, CoreOS/RedHat ContainerLinux or CentOS 7 distributions
• Using Ubuntu with CRI-O container runtime instead of Docker

What does not work

• Master creation (Not planned at the moment)

Quickstart

Deploy the machine-controller

kubectl apply -f examples/machine-controller.yaml

Creating a machine

# edit examples/machine.yaml & create the machine
kubectl create -f examples/machine.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

This project provides easy to use e2e testing using Hetzner cloud. To run the e2e tests locally, the following steps are required:

• Populate the environment variable HZ_TOKEN with a valid Hetzner cloud token
• Run make e2e-cluster to get a simple kubeadm cluster on Hetzner
• Run hack/run-machine-controller.sh to locally run the machine-controller for your freshly created cluster

Now you can either

• Run the tests for all providers via go test -race -tags=e2e -parallel 240 -v -timeout 30m ./test/e2e/... -identifier $USER
• Check test/e2e/provisioning/all_e2e_test.go for the available tests, then run only a specific one via go test -race -tags=e2e -parallel 24 -v -timeout 20m ./test/e2e/... -identifier $USER -run $TESTNAME

Note: All e2e tests require corresponding credentials to be present, check test/e2e/provisioning/all_e2e_test.go for details

Note: After finishing testing, pleae clean up after yourself:

• Execute ./test/tools/integration/cleanup_machines.sh while the machine-controller is still running
• Execute make -C test/tools/integration destroy to clean up the test control plane

You can also insert your ssh key into the created instances by editing the manifests in test/e2e/provisioning/testdata/