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Kamaji and IONOS Cloud

The Kamaji Control Plane provider was able to create an IONOS Cloud backed Kubernetes cluster by providing Kamaji Control Planes.

NAME                                                           READY  SEVERITY  REASON  SINCE  MESSAGE
Cluster/kamaji-quickstart                                      True                     10m
├─ClusterInfrastructure - IonosCloudCluster/kamaji-quickstart  True                     11m
├─ControlPlane - KamajiControlPlane/kamaji-quickstart
└─Workers
  └─MachineDeployment/kamaji-quickstart                        True                     19s
    └─Machine/kamaji-quickstart-xqwjx-5xhln                    True                     105s

Example manifests

apiVersion: cluster.x-k8s.io/v1beta1
kind: Cluster
metadata:
  name: kamaji-quickstart
  labels:
    cluster.x-k8s.io/cluster-name: kamaji-quickstart
spec:
  clusterNetwork:
    apiServerPort: 6443
    pods:
      cidrBlocks:
        - 192.168.0.0/16
  controlPlaneRef:
    kind: KamajiControlPlane
    apiVersion: controlplane.cluster.x-k8s.io/v1alpha1
    name: kamaji-quickstart
  infrastructureRef:
    apiVersion: infrastructure.cluster.x-k8s.io/v1alpha1
    kind: IonosCloudCluster
    name: kamaji-quickstart
---
apiVersion: v1
kind: Secret
metadata:
  name: kamaji-quickstart-credentials
  labels:
    cluster.x-k8s.io/cluster-name: kamaji-quickstart
type: Opaque
stringData:
  token: REDACTED
---
apiVersion: infrastructure.cluster.x-k8s.io/v1alpha1
kind: IonosCloudCluster
metadata:
  name: kamaji-quickstart
  labels:
    cluster.x-k8s.io/cluster-name: kamaji-quickstart
spec:
  credentialsRef:
    name: kamaji-quickstart-credentials
---
kind: KamajiControlPlane
apiVersion: controlplane.cluster.x-k8s.io/v1alpha1
metadata:
  name: kamaji-quickstart
  labels:
    cluster.x-k8s.io/cluster-name: kamaji-quickstart
spec:
  replicas: 1
  version: 1.29.2
  dataStoreName: default
  addons:
    coreDNS: {}
    kubeProxy: {}
  network:
    serviceType: LoadBalancer
---
apiVersion: cluster.x-k8s.io/v1beta1
kind: MachineDeployment
metadata:
  name: kamaji-quickstart
  labels: cluster.x-k8s.io/cluster-name: kamaji-quickstart
spec:
  clusterName: kamaji-quickstart
  replicas: 1
  selector:
    matchLabels:
  template:
    metadata:
      labels:
        node-role.kubernetes.io/node: ""
        cluster.x-k8s.io/cluster-name: kamaji-quickstart
    spec:
      clusterName: kamaji-quickstart
      version: 1.29.2
      bootstrap:
        configRef:
          name: kamaji-quickstart
          apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
          kind: KubeadmConfigTemplate
      infrastructureRef:
        name: kamaji-quickstart
        apiVersion: infrastructure.cluster.x-k8s.io/v1alpha1
        kind: IonosCloudMachineTemplate
---
apiVersion: infrastructure.cluster.x-k8s.io/v1alpha1
kind: IonosCloudMachineTemplate
metadata:
  name: kamaji-quickstart
  labels:
    cluster.x-k8s.io/cluster-name: kamaji-quickstart
spec:
  template:
    spec:
      datacenterID: REDACTED
      numCores: 2
      memoryMB: 4096
      disk:
        image:
          id: REDACTED
---
apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
kind: KubeadmConfigTemplate
metadata:
  name: kamaji-quickstart
  labels:
    cluster.x-k8s.io/cluster-name: kamaji-quickstart
spec:
  template:
    spec:
      users:
        - name: root
          sshAuthorizedKeys: [REDACTED]
      files:
        - content: |
            {"datacenter-id":"REDACTED"}
          owner: root:root
          path: /etc/ie-csi/cfg.json
          permissions: '0644'
      postKubeadmCommands:
        - |
          export system_uuid=$(kubectl --kubeconfig /etc/kubernetes/kubelet.conf get node $(hostname) -ojsonpath='{..systemUUID }')
          kubectl --kubeconfig /etc/kubernetes/kubelet.conf patch node $(hostname) --type strategic -p '{"spec": {"providerID": "ionos://'${system_uuid}'"}}'
      joinConfiguration:
        nodeRegistration:
          kubeletExtraArgs:
            cloud-provider: ""
          criSocket: unix:///run/containerd/containerd.sock

Technical considerations

The Cluster API IONOS Cloud infrastructure provider supports Kamaji managed Control Planes starting from v0.4.0.

To make use of service type LoadBalancer for the KamajiControlPlane, you need to install the IONOS Cloud Controller Manager. Alternatively, you can install the CAPI stack in a managed cluster.