KubeVirt

From David's Wiki
Revision as of 19:51, 13 February 2022 by David (talk | contribs) (→‎Windows)
\( \newcommand{\P}[]{\unicode{xB6}} \newcommand{\AA}[]{\unicode{x212B}} \newcommand{\empty}[]{\emptyset} \newcommand{\O}[]{\emptyset} \newcommand{\Alpha}[]{Α} \newcommand{\Beta}[]{Β} \newcommand{\Epsilon}[]{Ε} \newcommand{\Iota}[]{Ι} \newcommand{\Kappa}[]{Κ} \newcommand{\Rho}[]{Ρ} \newcommand{\Tau}[]{Τ} \newcommand{\Zeta}[]{Ζ} \newcommand{\Mu}[]{\unicode{x039C}} \newcommand{\Chi}[]{Χ} \newcommand{\Eta}[]{\unicode{x0397}} \newcommand{\Nu}[]{\unicode{x039D}} \newcommand{\Omicron}[]{\unicode{x039F}} \DeclareMathOperator{\sgn}{sgn} \def\oiint{\mathop{\vcenter{\mathchoice{\huge\unicode{x222F}\,}{\unicode{x222F}}{\unicode{x222F}}{\unicode{x222F}}}\,}\nolimits} \def\oiiint{\mathop{\vcenter{\mathchoice{\huge\unicode{x2230}\,}{\unicode{x2230}}{\unicode{x2230}}{\unicode{x2230}}}\,}\nolimits} \)

KubeVirt lets you setup and manage virtual machines on your kubernetes cluster.

Getting Started

Background

KubeVirt creates two new types of resources on your cluster: VirtualMachine (vm) and VirtualMachineInstance (vmi). VirtualMachine defines how to create VMIs. VirtualMachineInstance represent a running virtual machine.

Similar to deployments-pods, you will typically not create VirtualMachineInstance manually. Instead you define VirtualMachine in your manifests and control them using virtctl. Then KubeVirt will automatically create VirtualMachineInstance.

Requirements

See requirements

  • You need a kubernetes cluster with kubectl set up.
  • You do not need to install qemu-kvm libvirt-daemon-system on the nodes.

Install KubeVirt

See installation

Install commands
# Get the latest version string
export VERSION=$(curl -s https://api.github.com/repos/kubevirt/kubevirt/releases | grep tag_name | grep -v -- '-rc' | sort -r | head -1 | awk -F': ' '{print $2}' | sed 's/,//' | xargs)
echo $VERSION

# Deploy operator
kubectl create -f https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/kubevirt-operator.yaml
# Deploy custom resources
kubectl create -f https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/kubevirt-cr.yaml

# Install virtctl
VERSION=$(kubectl get kubevirt.kubevirt.io/kubevirt -n kubevirt -o=jsonpath="{.status.observedKubeVirtVersion}")
ARCH=$(uname -s | tr A-Z a-z)-$(uname -m | sed 's/x86_64/amd64/') || windows-amd64.exe
echo ${ARCH}
curl -L -o virtctl https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/virtctl-${VERSION}-${ARCH}
chmod +x virtctl
sudo install virtctl /usr/local/bin

Creating a VM

Loading ISOs into the cluster

Windows

  • Deploy the example manifest below.
  • During the install, you will need to load the `viostor` driver.
  • After install, load the remaining drivers using device manager.
  • Then you can remove the cdrom and windows-guest-tools disks.

{{hidden | Example manifest |

apiVersion: v1
kind: PersistentVolume
metadata:
  name: windows10vm-pv
spec:
  capacity:
    storage: 100Gi
  accessModes:
    - ReadWriteMany
  nfs:
    server: 192.168.1.44
    path: "/media/mergerfs1/Services/kubernetes_services/vms/windows10vm/"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: windows10vm-pvc
spec:
  storageClassName: ""
  volumeName: windows10vm-pv
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 100Gi
---
apiVersion: kubevirt.io/v1alpha3
kind: VirtualMachine
metadata:
  name: windows10vm
spec:
  running: false
  template:
    metadata:
      labels:
        kubevirt.io/domain: win10vm1
    spec:
      terminationGracePeriodSeconds: 300
      domain:
        cpu:
          cores: 4
        resources:
          requests:
            memory: 8G
        devices:
          disks:
            - bootOrder: 1
              cdrom:
                bus: sata
              name: cdrom
            - name: maindrive
              bootOrder: 1
              disk:
                bus: virtio
            - name: windows-guest-tools
              bootOrder: 2
              cdrom:
                bus: sata
          interfaces:
            - masquerade: {}
              model: e1000e
              name: nic-0
          sound:
            name: audio
            model: ich9
      networks:
        - name: nic-0
          pod: {}
      volumes:
        - name: cdrom
          persistentVolumeClaim:
            claimName: iso-win10
        - name: maindrive
          persistentVolumeClaim:
            claimName: windows10vm-pvc
        - containerDisk:
            image: quay.io/kubevirt/virtio-container-disk
          name: windows-guest-tools

Resources