longhorn/chart

Longhorn Chart

Important

: Please install Longhorn chart in longhorn-system namespace only.

Warning

: Longhorn doesn't support downgrading from a higher version to a lower version.

Source Code

Longhorn is 100% open source software. Project source code is spread across a number of repos:

1. Longhorn Engine -- Core controller/replica logic https://github.com/longhorn/longhorn-engine
2. Longhorn Instance Manager -- Controller/replica instance lifecycle management https://github.com/longhorn/longhorn-instance-manager
3. Longhorn Manager -- Longhorn orchestration, includes CSI driver for Kubernetes https://github.com/longhorn/longhorn-manager
4. Longhorn UI -- Dashboard https://github.com/longhorn/longhorn-ui

Prerequisites

1. Docker v1.13+
2. Kubernetes v1.15+
3. Make sure curl, findmnt, grep, awk and blkid has been installed in all nodes of the Kubernetes cluster.
4. Make sure open-iscsi has been installed in all nodes of the Kubernetes cluster. For GKE, recommended Ubuntu as guest OS image since it contains open-iscsi already.

Installation

1. Add Longhorn char repository.

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

2. Update local Longhorn chart information from chart repository.

helm repo update

3. Install Longhorn chart.

• With Helm 2, the following command will create longhorn-system namespaceand install Longhorn chart together.

helm install longhorn/longhorn --name longhorn --namespace longhorn-system

• With Helm 3, the following commands will create longhorn-system namespace first, then install Longhorn chart.

kubectl create namespace longhorn-system
helm install longhorn longhorn/longhorn --namespace longhorn-system

Uninstallation

With Helm 2 to uninstall Longhorn.

helm delete longhorn --purge

With Helm 3 to uninstall Longhorn.

helm uninstall longhorn -n longhorn-system
kubectl delete namespace longhorn-system

---

Please see link for more information.