Longhorn

🐮 Longhorn

[!info]
Longhorn is a lightweight, reliable, and easy-to-use distributed block storage system for Kubernetes.
It's designed to provide persistent volumes in cloud-native environments.

🔗 Project Homepage: Longhorn Homepage
📚 Docs: Longhorn Docs

🔍 Overview

• Type: Cloud-native block storage

• Use Case: Kubernetes persistent storage

• Deployment: #Helm-chart (recommended)

• Key Features:

  • Replication across nodes

  • Incremental backups and snapshots

  • UI and CLI management

  • CRD-based custom resource handling

🛠️ Features

• 🚀 Lightweight and easy to install

• 🧱 Supports incremental snapshot and backup

• 🔁 Synchronous block-level replication

• 🖥️ Built-in UI for volume and backup management

• ⚙️ Works with standard Kubernetes volume primitives

🏃 Getting Started

📦 Install Longhorn using Helm

[!tip] Customize Helm values by reviewing values.yaml

helm repo add longhorn https://charts.longhorn.io
helm repo update
helm install longhorn longhorn/longhorn

🔧 Customization and Configuration

[!example]+ Helm Values Example You can override values like storage class name, default replica count, or node selectors in your custom values.yaml.

defaultSettings:
  defaultReplicaCount: 3
  defaultDataPath: "/var/lib/longhorn"

🛠️ Troubleshooting

[!question]- Why is my volume stuck in detached state?

• Check if the node is available and has disk space.

• Look into the longhorn-manager logs for possible issues.

• Ensure the Longhorn UI shows the node as Ready.

[!warning]
Make sure default Kubernetes storage class is not conflicting with Longhorn if you're using multiple storage providers.

🔄 Related

• Kubernetes – Container orchestration platform

• Helm – Kubernetes package manager

• Rancher – Longhorn is part of the Rancher ecosystem

🌍 Explore More

• 🌐 Longhorn GitHub

• 🌐 Longhorn Troubleshooting

• 🌐 Longhorn UI

📚 Tags

• #Longhorn

• #Kubernetes

• #Helm

• #Storage

• #CloudNative

• #Volumes

• #DistributedSystems