✨ Add Metal3 provider

[chess-knight]

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #21

Special notes for your reviewer:
Test on virtualized environment:
See docs https://book.metal3.io/quick-start

1. I created Ubuntu instance in gx-scs - flavor SCS-16V-64 and 200GiB disk
   • install libvirt https://ubuntu.com/server/docs/libvirt
   • install virt-install https://ubuntu.com/server/docs/virtual-machine-manager
2. Create libvirt network - https://book.metal3.io/quick-start#virtualized-configuration

   $ virsh net-info baremetal
   Name:           baremetal
   UUID:           ae14ef12-4ff1-4c54-90c8-38ebdec3542b
   Active:         yes
   Persistent:     yes
   Autostart:      no
   Bridge:         metal3

3. Create VMs - https://book.metal3.io/quick-start#virtualized-configuration
   • e.g. create 1 for control-plane and 3 for workers:

   virt-install \
     --connect qemu:///system \
     --name bmh-vm-01 `# workers 02, 03, 04` \
     --description "Virtualized BareMetalHost" \
     --osinfo=ubuntu-lts-latest \
     --ram=12288 \
     --vcpus=2 `# e.g. 3 vcpus for workers` \
     --disk size=25 `# add second disk (--disk size=20) for workers if you want to install rook-ceph` \
     --graphics=none \
     --console pty \
     --serial pty \
     --pxe \
     --network network=baremetal,mac="00:60:2f:31:81:01" `# workers 02, 03, 04` \
     --noautoconsole

   $ virsh list
    Id   Name        State
   ---------------------------
    1    bmh-vm-01   running
    2    bmh-vm-02   running
    3    bmh-vm-03   running
    4    bmh-vm-04   running

4. Install sushy-tools for Redfish communication - https://book.metal3.io/quick-start#sushy-tools---aka-the-bmc

   $ docker logs sushy-tools
    * Serving Flask app 'sushy_tools.emulator.main'
    * Debug mode: off
   WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
    * Running on http://192.168.222.1:8000
   Press CTRL+C to quit

5. Create KinD management cluster - https://book.metal3.io/quick-start#management-cluster
6. Install Dnsmasq - https://book.metal3.io/quick-start#dhcp-server
   • use this config:

   DHCP_HOSTS=00:60:2f:31:81:01,192.168.222.100;00:60:2f:31:81:02,192.168.222.101;00:60:2f:31:81:03,192.168.222.102;00:60:2f:31:81:04,192.168.222.103
   DHCP_IGNORE=tag:!known
   # IP of the host from VM perspective
   PROVISIONING_IP=192.168.222.1
   GATEWAY_IP=192.168.222.1
   DHCP_RANGE=192.168.222.100,192.168.222.149
   DNS_IP=provisioning
   

7. Skip Image server (we use osism images) - https://book.metal3.io/quick-start#image-server
8. Deploy Ironic - https://book.metal3.io/quick-start#deploy-ironic
9. Deploy Bare Metal Operator - https://book.metal3.io/quick-start#deploy-bare-metal-operator
10. Create BareMetalHosts - https://book.metal3.io/quick-start#create-baremetalhosts
    • 1 for control-plane and 3 for workers:

    apiVersion: v1
    kind: Secret
    metadata:
      name: bml-01 # workers 02, 03, 04
    type: Opaque
    stringData:
      username: replaceme
      password: replaceme
    ---
    apiVersion: metal3.io/v1alpha1
    kind: BareMetalHost
    metadata:
      name: bml-vm-01 # workers 02, 03, 04
      labels:
        type: control-plane # 'type: worker' for workers
    spec:
      online: true
      bootMACAddress: 00:60:2f:31:81:01 # workers 02, 03, 04
      bootMode: legacy
      hardwareProfile: libvirt
      bmc:
        address: redfish-virtualmedia+http://192.168.222.1:8000/redfish/v1/Systems/bmh-vm-01 # workers 02, 03, 04
        credentialsName: bml-01 # workers 02, 03, 04

    $ kubectl get bmh --show-labels
    NAME        STATE       CONSUMER   ONLINE   ERROR   AGE   LABELS
    bml-vm-01   available              true             11m   type=control-plane
    bml-vm-02   available              true             11m   type=worker
    bml-vm-03   available              true             11m   type=worker
    bml-vm-04   available              true             11m   type=worker

11. Deploy CAPI/CAPM3/CSO

    export CLUSTER_TOPOLOGY=true
    clusterctl init --infrastructure metal3
    # apply Metal3ClusterTemplate CRD until new CAPM3 release (current v1.7.0)
    kubectl apply -f https://raw.githubusercontent.com/metal3-io/cluster-api-provider-metal3/main/config/crd/bases/infrastructure.cluster.x-k8s.io_metal3clustertemplates.yaml
    kubectl label crd metal3clustertemplates.infrastructure.cluster.x-k8s.io cluster.x-k8s.io/v1beta1=v1beta1
    # install CSO in your favourite way

12. Create Cluster Stack

    apiVersion: clusterstack.x-k8s.io/v1alpha1
    kind: ClusterStack
    metadata:
      name: clusterstack
    spec:
      provider: metal3
      name: alpha
      kubernetesVersion: "1.28"
      channel: custom
      autoSubscribe: false
      noProvider: true
      versions:
      - v0-sha.b08777e

    $ kubectl get clusterstack
    NAME           PROVIDER   CLUSTERSTACK   K8S    CHANNEL   AUTOSUBSCRIBE   USABLE           LATEST                                       AGE   REASON   MESSAGE
    clusterstack   metal3     alpha          1.28   custom    false           v0-sha-b08777e   metal3-alpha-1-28-v0-sha-b08777e | v1.28.9   12m

13. Create Cluster

    apiVersion: cluster.x-k8s.io/v1beta1
    kind: Cluster
    metadata:
      name: my-cluster
    spec:
      topology:
        class: metal3-alpha-1-28-v0-sha.b08777e
        version: v1.28.9
        controlPlane:
          replicas: 1
        workers:
          machineDeployments:
          - class: default-worker
            name: alpha
            replicas: 3
        variables:
    #   Required
        - name: controlPlaneEndpoint
          value:
            host: 192.168.222.150
    #        port: 6443
    #   Optional
        - name: workerHostSelector
          value:
            matchLabels:
              type: worker
        - name: controlPlaneHostSelector
          value:
            matchLabels:
              type: control-plane
    ##   Experiment with other optional variables, e.g. try rook-ceph
    #    - name: user
    #      value:
    #        name: user
    #        sshKey: ssh-ed25519 ABCD... user@example.com
    #    - name: image
    #      value:
    #        checksum: https://swift.services.a.regiocloud.tech/swift/v1/AUTH_b182637428444b9aa302bb8d5a5a418c/openstack-k8s-capi-images/ubuntu-2204-kube-v1.28/ubuntu-2204-kube-v1.28.9.qcow2.CHECKSUM
    #        checksumType: sha256
    #        format: qcow2
    #        url: https://swift.services.a.regiocloud.tech/swift/v1/AUTH_b182637428444b9aa302bb8d5a5a418c/openstack-k8s-capi-images/ubuntu-2204-kube-v1.28/ubuntu-2204-kube-v1.28.9.qcow2
    #    - name: rook_ceph_cluster_values
    #      value: |
    #        enabled: true
    #    - name: workerDataTemplate
    #      value: my-cluster-workers-template
    #    - name: controlPlaneDataTemplate
    #      value: my-cluster-controlplane-template
    #---
    #apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
    #kind: Metal3DataTemplate
    #metadata:
    #  name: my-cluster-controlplane-template
    #spec:
    #  clusterName: my-cluster
    #---
    #apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
    #kind: Metal3DataTemplate
    #metadata:
    #  name: my-cluster-workers-template
    #spec:
    #  clusterName: my-cluster

    $ kubectl get cluster,metal3cluster
    NAME                                  CLUSTERCLASS                       PHASE         AGE   VERSION
    cluster.cluster.x-k8s.io/my-cluster   metal3-alpha-1-28-v0-sha.b08777e   Provisioned   62m   v1.28.9
    
    NAME                                                             AGE   READY   ERROR   CLUSTER      ENDPOINT
    metal3cluster.infrastructure.cluster.x-k8s.io/my-cluster-srg2j   62m   true            my-cluster   {"host":"192.168.222.150","port":6443}
    $ clusterctl get kubeconfig my-cluster > kubeconfig.yaml

14. Test kube-vip service loadbalancing

    $ kubectl --kubeconfig kubeconfig.yaml create deploy --image nginx --port 80 nginx
    # --load-balancer-ip needs to be specified because kube-vip-cloud-provider is missing
    $ kubectl --kubeconfig kubeconfig.yaml expose deployment nginx --port 80 --type LoadBalancer --load-balancer-ip 192.168.222.151
    $ curl 192.168.222.151
    <!DOCTYPE html>
    <html>
    <head>
    <title>Welcome to nginx!</title>
    <style>
    html { color-scheme: light dark; }
    body { width: 35em; margin: 0 auto;
    font-family: Tahoma, Verdana, Arial, sans-serif; }
    </style>
    </head>
    <body>
    <h1>Welcome to nginx!</h1>
    <p>If you see this page, the nginx web server is successfully installed and
    working. Further configuration is required.</p>
    
    <p>For online documentation and support please refer to
    <a href="http://nginx.org/">nginx.org</a>.<br/>
    Commercial support is available at
    <a href="http://nginx.com/">nginx.com</a>.</p>
    
    <p><em>Thank you for using nginx.</em></p>
    </body>
    </html>

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

• squash commits
• include documentation
• add unit tests