kubevirt-demo

• kubevirt-demo
  • Kubernetes Cluster Setup
    • Kind Cluster
    • Install Kubevirt's Operator and Custom Resource Definitions
    • Install Kubevirt's Containerized Data Importer
  • Deployment
    • Ubuntu 20.04 VM
      • Import the Ubuntu 20.04 Cloud Image
      • Deploy the Ubuntu VM using the DataVolume
      • Connect to the Console of the Ubuntu VMI
      • Possible Issue

Kubernetes Cluster Setup

Kind Cluster

Setup Local Kubernetes Cluster with Kind Cluster

kind create cluster --config examples/kind-cluster/kind-multi-node.yaml

Install Kubevirt's Operator and Custom Resource Definitions

This demo was tested with kubevirt version v0.38.1. You may choose to run export VERSION=v0.38.1 instead of the export command below.

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

Wait until the kubevirt status is Deployed

kubectl get all -n kubevirt

Install Kubevirt's Containerized Data Importer

This demo was tested with CDI version v1.30.0. You may choose to run export VERSION=v1.30.0 instead of the export command below.

export VERSION=$(curl -s https://github.com/kubevirt/containerized-data-importer/releases/latest | grep -o "v[0-9]\.[0-9]*\.[0-9]*")
kubectl create -f https://github.com/kubevirt/containerized-data-importer/releases/download/$VERSION/cdi-operator.yaml
kubectl create -f https://github.com/kubevirt/containerized-data-importer/releases/download/$VERSION/cdi-cr.yaml

Deployment

Ubuntu 20.04 VM

Import the Ubuntu 20.04 Cloud Image

Open the examples/ubuntu/data-volume.yaml file and confirm the URL for the cloud image still exists at https://cloud-images.ubuntu.com/. If it doesn't exist you'll have to update it.

If it exists, import the disk image using a DataVolume

kubectl apply -f examples/ubuntu/data-volume.yaml

Wait for the import process to complete

kubectl get datavolume

Deploy the Ubuntu VM using the DataVolume

kubectl apply -f examples/ubuntu/vm.yaml

Check the Virtual Machine Instance (VMI) has been created

kubectl get vm, vmi, pod

Connect to the Console of the Ubuntu VMI

kubectl virt connect ubuntuvm

Login with the ubuntu user. The user details can be found in the examples/ubuntu/vm.yaml. You'll have to decode the value of userDataBase64 with echo "<STRING> | base64 --decode.

Possible Issue

After connecting to the console, you may get the following error that usually shows up if you delete a VM and recreate it using the same DataVolume

Error check 1

ubuntu@ubuntuvm:~$ ping 8.8.8.8
ping: connect: Network is unreachable

Error check 2

ubuntu@ubuntuvm:~$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 6a:84:90:ca:0a:41 brd ff:ff:ff:ff:ff:ff
root@ubuntuvm:~#

Take note of the mac address, it is next to link/ether. In this example it is 6a:84:90:ca:0a:41

Error check 3

root@ubuntuvm:~# netplan try
Warning: Stopping systemd-networkd.service, but it can still be activated by:
  systemd-networkd.socket
[]
Cannot find unique matching interface for enp1s0: {'macaddress': '8a:ff:02:a4:29:e4'}
Do you want to keep these settings?


Press ENTER before the timeout to accept the new configuration

To solve the error, you need edit the contents of the /etc/netplan/50-cloud-init.yaml and replace the mac address with the correct one. Once netplan try shows no errors you can run network apply to apply the fix.