KubeVirt — 安装KubeVirt及启动VM

kubernetes version: v1.18.8

kubevirt version: v0.35.0

安装KubeVirt

• 验证硬件是否支持虚拟化

  $ virt-host-validate qemu
    QEMU: Checking for hardware virtualization                                 : PASS
    QEMU: Checking if device /dev/kvm exists                                   : PASS
    QEMU: Checking if device /dev/kvm is accessible                            : PASS
    QEMU: Checking if device /dev/vhost-net exists                             : PASS
    QEMU: Checking if device /dev/net/tun exists                               : PASS
  

• 安装KubeVirt

  # Pick an upstream version of KubeVirt to install
  $ export RELEASE=v0.35.0
  # Deploy the KubeVirt operator
  $ kubectl apply -f https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/kubevirt-operator.yaml
  # Create the KubeVirt CR (instance deployment request) which triggers the actual installation
  $ kubectl apply -f https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/kubevirt-cr.yaml
  # wait until all KubeVirt components are up
  $ kubectl -n kubevirt wait kv kubevirt --for condition=Available
  

  如果硬件不支持虚拟化，可以通过以下方法开启软件仿真：

  • 编辑kubevirt配置

  $ kubectl edit -n kubevirt kubevirt kubevirt
  

  • 添加以下内容：

  spec:
    ...
    configuration:
      developerConfiguration:
        useEmulation: true
  

• 查看kubevirt组件

  $ kubectl get pod -n kubevirt

  NAME                               READY   STATUS    RESTARTS   AGE
  virt-api-64999f7bf5-85dgb          1/1     Running   0          1m
  virt-api-64999f7bf5-vh98w          1/1     Running   0          1m
  virt-controller-8696ccdf44-8rrqs   1/1     Running   0          1m
  virt-controller-8696ccdf44-qq7tb   1/1     Running   0          1m
  virt-handler-dv2zb                 1/1     Running   0          1m
  virt-handler-hz9k8                 1/1     Running   0          1m
  virt-handler-zlnzs                 1/1     Running   0          1m
  virt-operator-78fbcdfdf4-jlv58     1/1     Running   0          1m
  virt-operator-78fbcdfdf4-rbkww     1/1     Running   0          1m
  

启动虚拟机

• 部署VirtualMachineInstance

  kubectl apply -f vmi.yaml

  # $ cat vmi.yaml
  apiVersion: kubevirt.io/v1alpha3
  kind: VirtualMachineInstance
  metadata:
    name: testvmi-nocloud
  spec:
    terminationGracePeriodSeconds: 30
    domain:
      resources:
        requests:
          memory: 1024M
      devices:
        disks:
        - name: containerdisk
          disk:
            bus: virtio
        - name: emptydisk
          disk:
            bus: virtio
        - disk:
            bus: virtio
          name: cloudinitdisk
    volumes:
    - name: containerdisk
      containerDisk:
        image: kubevirt/fedora-cloud-container-disk-demo:latest
    - name: emptydisk
      emptyDisk:
        capacity: "2Gi"
    - name: cloudinitdisk
      cloudInitNoCloud:
        userData: |-
          #cloud-config
          password: fedora
          chpasswd: { expire: False }
  

• kubectl get pod

  NAME                                      READY   STATUS    RESTARTS   AGE
  virt-launcher-testvmi-nocloud-2gg8h       2/2     Running   0          5m
  

• kubectl get vmi

  NAME              AGE   PHASE     IP               NODENAME
  testvmi-nocloud   19h   Running   172.16.154.205   k8s-node-01
  

• 通过console访问vmi