Deploy your VM in Kubernetes Cluster using Kubevirt

Solution for integration between Microservices & Virtual Machine | Deploy VM on top Kubernetes

https://kubevirt.io/

Intro

Kubevirt provides a seamless solution for integrating microservices with virtual machines in a Kubernetes cluster. To get started, install Kubevirt onto your cluster using the Kubevirt Operator, and then use the Kubevirt API to define and create virtual machines. With Kubevirt, you can manage virtual machines just like any other Kubernetes resource, using tools like kubectl to monitor and modify them.

In addition to Kubernetes features such as RBAC and network policies, Kubevirt also provides a user-friendly web-based interface for managing virtual machines. This allows you to easily create and configure VMs, as well as monitor their performance and resource usage. By deploying your VMs in Kubernetes with Kubevirt, you can enjoy the scalability and reliability of containerized microservices, while also leveraging the versatility and power of virtual machines for your application infrastructure.

Purpose

This scenario walks through the creation of a Virtual Machine Instance (VMI) on Kubernetes and then how virtctl is used to interact with its console. This tutorial based on Kubevirt Documentation.

Practical

Pre-requisites

• Kubernetes Cluster
• Kubevirt already installed on Kubernetes Cluster

Installation

Create VM

nano vm.yaml
...
apiVersion: kubevirt.io/v1alpha3
kind: VirtualMachine
metadata:
  name: testvm
spec:
  running: false
  template:
    metadata:
      labels:
        kubevirt.io/size: small
        kubevirt.io/domain: ubuntu-bionic
    spec:
      domain:
        cpu:
          cores: 1
        devices:
          disks:
            - name: containervolume
              disk:
                bus: virtio
            - name: cloudinitvolume
              disk:
                bus: virtio
          interfaces:
          - name: default
            masquerade: {}
        resources:
          requests:
            memory: 2048M
      networks:
      - name: default
        pod: {}
      volumes:
        - name: containervolume
          containerDisk:
            image: tedezed/ubuntu-container-disk:20.0
        - name: cloudinitvolume
          cloudInitNoCloud:
            userData: |-
              #cloud-config
              chpasswd:
                list: |
                  ubuntu:ubuntu
                  root:toor
                expire: False

Apply the manifest to Kubernetes

kubectl create ns vm
kubectl apply -f vm.yaml -n vm
...output...
virtualmachine.kubevirt.io "testvm" created
  virtualmachineinstancepreset.kubevirt.io "small" created

Manage Virtual Machines

To get a list of existing Virtual Machines

kubectl get vms -n vm
...output...
NAME     AGE    STATUS    READY
testvm   117s   Stopped   False
............
kubectl get vms -o yaml testvm -n vm

To start a Virtual Machine you can use:

virtctl start testvm -n vm
...output...
VM testvm was scheduled to start
............

kubectl get vms -n vm
...output...
NAME     AGE     STATUS    READY
testvm   4m27s   Running   True

After start we can check status VM

kubectl get vmis -n vm
NAME     AGE    PHASE     IP              NODENAME           READY
testvm   2m6s   Running   10.10.101.140   kubevirt-worker1   True

Controlling the State of the VM

To shut it down:

virtctl stop testvm -n vm

To delete a Virtual Machine:

kubectl delete vm testvm -n vm

Conclusion

In conclusion, Kubevirt is a powerful tool for deploying virtual machines in a Kubernetes cluster. By integrating microservices and virtual machines in this way, you can take advantage of the scalability and flexibility of containerized applications, while also leveraging the power and versatility of virtualization. With Kubevirt, you can manage virtual machines just like any other Kubernetes resource, using familiar tools and interfaces such as kubectl and web-based dashboards.

In addition, Kubevirt offers a range of features to help you get the most out of your virtual machines, including support for various operating systems, virtualized hardware devices, and high-performance networking. Whether you’re running a complex enterprise application or a simple development environment, Kubevirt can provide a seamless and integrated solution for all your virtualization needs. So, if you’re looking to deploy virtual machines in Kubernetes, be sure to check out Kubevirt and see how it can help you streamline your infrastructure and improve your application performance.

Our Tagline

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Reference

Use KubeVirt | KubeVirt.io

Getting KubeVirt and K0s to play nicely on Ubuntu 20.04 LTS | by Joseph Bironas | Medium

Tedezed/kubevirt-images-generator: Easy Kubevirt images generator — Public images repository 💿 (github.com)