Pet VMs in Kubernetes? WTH

Fabian Deutsch, Red Hat

devconf.cz, 2017

@dummdida - dummida.tumblr.com

https://www.flickr.com/photos/infinitelydigital/3763912574/

Why?

Pet VMs

• Many knobs and switches
• Hand crafted - VM and its contents

"Oh! I deleted the VM. Argh."

Kubernetes

• It's all about running containers
• Images become ready-to-use containers

"Oh - I deleted a container?"

Workloads: Differ

Infrastructure: Similar

Container Cluster

VM Cluster

Same infrastructure & different workloads

Container and VM Cluster

First Try

s /docker/qemu/

Try: Don't run a pod but a pet VM instead

Keep everything Kubernetes, just replace the launcher

Ugh.

(Fail)

Representation + Handling

Try Again

KubeVirt

• Virtualization add-on to Kubernetes
• Resources, controllers & daemons

Kubernetes

virt-controller

VM (TPR)

virt-handler

VM

kubelet

Cluster

Host

Pod

$ curl run.kubevirt.io/demo.sh | bash

(Fedora 25, Ubuntu 16.04.1 LTS)

Up Next →

• Disks

• Networks

• Improved Scheduling

…

Beyond

• Live Migration

• Templating

• Host API

• K8s TPR Improvements

• K8s Snapshot Improvements

• K8s Volume Cloning

…

Ouch. Issues. Ouch. Gaps.

Opportunities

Common ground for cluster wide virtualization management.

• Focus on virtualization and consume infrastructure
• Embrace Kubernetes as a cluster manager
• Improve Kubernetes in supporting other workloads

Questions?

http://kubevirt.io

@kubevirt

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