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v1.1.0-rc1
longhorn/chart/README.md
Bo Tao c2753700b0 Update longhorn chart README.md 
1. Remove Rancher from prerequisites.
2. Update to Kubernetes v1.15+.
3. Update the contents for installation and uninstallation.

Longhorn #1617

Signed-off-by: Bo Tao <bo.tao@rancher.com>
2020-10-22 15:06:57 -07:00

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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
  1. Update local Longhorn chart information from chart repository.
helm repo update
  1. 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.