Deploy Longhorn storage for Kubernetes on Azure Arm VMs
Introduction
Understand Longhorn on Azure Cobalt 100
Create an Arm64 Azure virtual machine powered by Azure Cobalt 100
Allow network access to the Longhorn Web UI on Azure
Install and run Longhorn on a single-node Kubernetes cluster
Validate and benchmark Longhorn storage with fio
Next Steps

  Log an issue

  Fork and edit

  Discuss on Discord

About this Learning Path

Skill level:  Introductory
Reading time:  1 hr
Last updated:  03 Nov 2026
Skill level:
  Introductory
Reading time:
  1 hr
Last updated:
  03 Nov 2026
Author:Pareena Verma, Arm
Arm IP:Neoverse
Tags: Containers and Virtualization Microsoft Azure Cobalt Linux Longhorn Kubernetes K3s fio
Author:
  • Pareena Verma, Arm
Arm IP:
Neoverse
Tags:
Containers and Virtualization Microsoft Azure Cobalt Linux Longhorn Kubernetes K3s fio

Who is this for?

This is an introductory topic for developers, DevOps engineers, platform engineers, and Kubernetes administrators who want to deploy persistent storage for Kubernetes workloads using Longhorn on Arm-based cloud infrastructure.

What will you learn?

After completing this Learning Path, you'll be able to perform the following tasks:

  • Install and configure K3s Kubernetes on an Arm64 Azure virtual machine (VM) powered by Azure Cobalt 100.
  • Install and configure Longhorn distributed block storage on Arm64.
  • Create and manage Kubernetes persistent volumes using Longhorn.
  • Benchmark Kubernetes storage performance using fio.

Prerequisites

Before starting, you'll need the following prerequisites:

  • A Microsoft Azure account with access to Cobalt 100-based instances (Dpsv6)
  • Basic knowledge of Linux command-line operations
  • Familiarity with SSH and remote server access
  • Basic understanding of Kubernetes and containerized workloads

Summary

AI-assisted

This summary was drafted with an approved AI-assisted workflow and reviewed by Arm contributors before publication. Human technical review remains part of the process so the final page reflects engineering rigor, accuracy, and Arm editorial standards.

Close
?
You’ll deploy Longhorn-backed persistent storage on an Azure VM powered by Cobalt 100. First, you’ll provision a Dpsv6 VM, configure network access, and set up a single-node K3s cluster with the required iSCSI utilities. Then, you’ll install Longhorn, attach a PersistentVolumeClaim to a workload, and verify that its data survives pod recreation. Finally, you’ll run fio against the volume to capture baseline storage metrics.
Next