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Create a new Air-gapped vSphere Cluster


Before you begin, be sure that you have created a Bootstrap Cluster

Create a new vSphere Kubernetes cluster

Use the following steps to create a new, air-gapped vSphere cluster.

  1. Configure your cluster to use an existing Docker registry as a mirror when attempting to pull images:

    IMPORTANT: The image must be created by the konvoy-image-builder project in order to use the registry mirror feature.

    export DOCKER_REGISTRY_URL=<https/http>://<registry-address>:<registry-port>
    export DOCKER_REGISTRY_CA=<path to the CA on the bastion>
    export DOCKER_REGISTRY_USERNAME=<username>
    export DOCKER_REGISTRY_PASSWORD=<password>
    • DOCKER_REGISTRY_URL: the address of an existing Docker registry accessible in the VPC that the new cluster nodes will be configured to use a mirror registry when pulling images.

    • DOCKER_REGISTRY_CA: (optional) the path on the bastion machine to the Docker registry CA. Konvoy will configure the cluster nodes to trust this CA. This value is only needed if the registry is using a self-signed certificate and the AMIs are not already configured to trust this CA.

    • DOCKER_REGISTRY_USERNAME: optional, set to a user that has pull access to this registry.

    • DOCKER_REGISTRY_PASSWORD: optional if username is not set.

  2. Create a Kubernetes cluster by copying the following command and substituting the valid values for your environment:

    dkp create cluster vsphere
      --cluster-name ${CLUSTER_NAME} \
      --network <NETWORK_NAME> \
      --control-plane-endpoint-host <CONTROL_PLANE_IP> \
      --data-center <DATACENTER_NAME> \
      --data-store <DATASTORE_NAME> \
      --folder <FOLDER_NAME> \
      --server <VCENTER_API_SERVER_URL> \
      --ssh-public-key-file </path/to/> \
      --resource-pool <RESOURCE_POOL_NAME> \
      --vm-template konvoy-ova-vsphere-os-release-k8s_release-vsphere-timestamp \
      --virtual-ip-interface <ip_interface_name> \
      --extra-sans "" \
      --registry-mirror-url=${DOCKER_REGISTRY_URL} \
      --registry-mirror-cacert=${DOCKER_REGISTRY_CA} \
      --registry-mirror-username=${DOCKER_REGISTRY_USERNAME} \

    If your environment uses HTTP/HTTPS proxies, you must include the flags --http-proxy, --https-proxy, and --no-proxy and their related values in this command for it to be successful. More information is available in Configure HTTP Proxy.

  3. Inspect the created cluster resources with the command:

    kubectl get clusters,kubeadmcontrolplanes,machinedeployments

  4. Use the wait command to monitor the cluster control-plane readiness:

    kubectl wait --for=condition=ControlPlaneReady "clusters/${CLUSTER_NAME}" --timeout=20m

    CODE${CLUSTER_NAME} condition met

    The READY status becomes True after the cluster control-plane becomes Ready in one of the following steps.

    After DKP creates the objects on the API server, the Cluster API controllers reconcile them, creating infrastructure and machines. As the controllers progress, they update the Status of each object.

  5. Run the DKP describe command to monitor the current status of the cluster:

    dkp describe cluster -c ${CLUSTER_NAME}

    NAME                                                                READY  SEVERITY  REASON  SINCE  MESSAGE
    Cluster/e2e-airgapped-1                                             True                     13h
    ├─ClusterInfrastructure - VSphereCluster/e2e-airgapped-1            True                     13h
    ├─ControlPlane - KubeadmControlPlane/e2e-airgapped-1-control-plane  True                     13h
    │ ├─Machine/e2e-airgapped-1-control-plane-7llgd                     True                     13h
    │ ├─Machine/e2e-airgapped-1-control-plane-vncbl                     True                     13h
    │ └─Machine/e2e-airgapped-1-control-plane-wbgrm                     True                     13h
        └─MachineDeployment/e2e-airgapped-1-md-0                          True                     13h
        ├─Machine/e2e-airgapped-1-md-0-74c849dc8c-67rv4                 True                     13h
        ├─Machine/e2e-airgapped-1-md-0-74c849dc8c-n2skc                 True                     13h
        ├─Machine/e2e-airgapped-1-md-0-74c849dc8c-nkftv                 True                     13h
        └─Machine/e2e-airgapped-1-md-0-74c849dc8c-sqklv                 True                     13h

  6. As they progress, the controllers also create Events, which you can list using the command:

    kubectl get events | grep ${CLUSTER_NAME}

    For brevity, this example uses grep. You can also use separate commands to get Events for specific objects, such as kubectl get events --field-selector involvedObject.kind="VSphereCluster" and kubectl get events --field-selector involvedObject.kind="VSphereMachine".

You can make the cluster self-managed with the information in the linked page.

Next Step:

You can explore your new cluster.

Known limitations

NOTE: Be aware of these limitations in the current release of DKP Konvoy.

  • The DKP Konvoy version used to create a bootstrap cluster must match the DKP Konvoy version used to create a workload cluster.

  • DKP Konvoy supports deploying one workload cluster.

  • DKP Konvoy generates a set of objects for one Node Pool.

  • DKP Konvoy does not validate edits to cluster objects.

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