Installing And Configuring Kubevirt On Microk8S

This article outlines the steps and considerations for installing Kubevirt, a virtual machine platform built on Kubernetes. It covers crucial components, installation procedures, and compatibility considerations when using Microk8s as the underlying Kubernetes distribution.

install kubevirt

do not install it on microk8s

install windows on kubevirt:

https://charlottemach.com/2020/11/03/windows-kubevirt-k3s.html

VirtualMachine is like Deployment while VirtualMachineInstance is like Pod

export kubeconfig file path to ~/.bashrc

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export KUBECONFIG=<kubeconfig_filepath>

download and modify the manifests

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# prefer ustc and azure mirrors of quay.io
export VERSION=$(curl -s https://api.github.com/repos/kubevirt/kubevirt/releases | grep tag_name | grep -v -- '-rc' | head -1 | awk -F': ' '{print $2}' | sed 's/,//' | xargs)
echo $VERSION
curl -OLk https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/kubevirt-operator.yaml
curl -OLk https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/kubevirt-cr.yaml
export VERSION=$(curl -s https://api.github.com/repos/kubevirt/containerized-data-importer/releases | grep tag_name | grep -v -- '-rc' | head -1 | awk -F': ' '{print $2}' | sed 's/,//' | xargs)
curl -LkO https://ghproxy.net/github.com/kubevirt/containerized-data-importer/releases/download/$VERSION/cdi-operator.yaml
curl -LkO https://ghproxy.net/github.com/kubevirt/containerized-data-importer/releases/download/$VERSION/cdi-cr.yaml

check if it works

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kubectl get pods -n kubevirt
kubectl get vmi

install virtctl

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# get the download address from: https://github.com/kubevirt/kubevirt/releases/
curl -LkO <download_address>
sudo mv <downloaded_binary> /usr/bin/virtctl
sudo chmod +x /usr/bin/virtctl

create vm (already with tun device inside)

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# init_vm.yaml
apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
name: <vm_name>
spec:
runStrategy: Always
template:
spec:
terminationGracePeriodSeconds: 30
dnsConfig:
nameservers:
- 8.8.8.8
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 }

apply it to run the vm

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kubectl apply -f init_vm.yaml
kubectl get vm
kubectl get vmi

to interact with the vm

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virtctl console <vm_name>
# ssh config is stored at: ~/.ssh/kube_known_hosts
virtctl ssh <user>@<vm_name>
# run this under gui, with `vncviewer` in path
# install with `apt install tigervnc-viewer`
virtctl vnc <vm_name>

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