Rancher Longhorn Chart
Important: Please install Longhorn chart in
Warning: Longhorn doesn’t support downgrading from a higher version to a lower version.
The following document pertains to running Longhorn from the Rancher 2.0 chart.
Longhorn is 100% open source software. Project source code is spread across a number of repos:
- Longhorn Engine – Core controller/replica logic https://github.com/longhorn/longhorn-engine
- Longhorn Instance Manager – Controller/replica instance lifecycle management https://github.com/longhorn/longhorn-instance-manager
- Longhorn Manager – Longhorn orchestration, includes CSI driver for Kubernetes https://github.com/longhorn/longhorn-manager
- Longhorn UI – Dashboard https://github.com/longhorn/longhorn-ui
- Rancher v2.1+
- Docker v1.13+
- Kubernetes v1.14+
- Make sure
blkidhas been installed in all nodes of the Kubernetes cluster.
- Make sure
open-iscsihas been installed in all nodes of the Kubernetes cluster. For GKE, recommended Ubuntu as guest OS image since it contains
To prevent damage to the Kubernetes cluster, we recommend deleting all Kubernetes workloads using Longhorn volumes (PersistentVolume, PersistentVolumeClaim, StorageClass, Deployment, StatefulSet, DaemonSet, etc).
From Rancher UI, navigate to
Catalog Appstab and delete Longhorn app.
I deleted the Longhorn App from Rancher UI instead of following the uninstallation procedure
Redeploy the (same version) Longhorn App. Follow the uninstallation procedure above.
Problems with CRDs
If your CRD instances or the CRDs themselves can’t be deleted for whatever reason, run the commands below to clean up. Caution: this will wipe all Longhorn state!
# Delete CRD instances and definitions curl -s https://raw.githubusercontent.com/longhorn/longhorn/v0.8.1/scripts/cleanup.sh |bash -s v062 curl -s https://raw.githubusercontent.com/longhorn/longhorn/v0.8.1/scripts/cleanup.sh |bash -s v070
Please see link for more information.