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Update README.md

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Add upgrade details.

Signed-off-by: Sheng Yang <sheng.yang@rancher.com>
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Sheng Yang 2019-11-15 14:07:25 -08:00 committed by GitHub
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@ -39,7 +39,7 @@ Longhorn is 100% open source software. Project source code is spread across a nu
# Requirements # Requirements
1. Docker v1.13+ 1. Docker v1.13+
2. Kubernetes v1.8+. Recommend v1.12+. 2. Kubernetes v1.14+.
3. `open-iscsi` has been installed on all the nodes of the Kubernetes cluster. 3. `open-iscsi` has been installed on all the nodes of the Kubernetes cluster.
1. For GKE, recommended Ubuntu as guest OS image since it contains open-iscsi already. 1. For GKE, recommended Ubuntu as guest OS image since it contains open-iscsi already.
2. For Debian/Ubuntu, use `apt-get install open-iscsi` to install. 2. For Debian/Ubuntu, use `apt-get install open-iscsi` to install.
@ -128,6 +128,8 @@ Noted that the UI is unauthenticated when you installed Longhorn using YAML file
# Upgrade # Upgrade
[See here](docs/upgrade.md) for details.
## Upgrade Longhorn manager ## Upgrade Longhorn manager
##### On Kubernetes clusters Managed by Rancher 2.1 or newer ##### On Kubernetes clusters Managed by Rancher 2.1 or newer
@ -144,12 +146,7 @@ helm upgrade longhorn ./longhorn/chart
``` ```
## Upgrade Longhorn engine ## Upgrade Longhorn engine
After upgraded manager, follow [the steps here](docs/upgrade.md#upgrade-longhorn-engine) to upgrade Longhorn engine for existing volumes. After Longhorn Manager was upgraded, Longhorn Engine also need to be upgraded using Longhorn UI. [See here](docs/upgrade.md) for details.
1. Upgrade v0.5.0 to v0.6.0 requires offline upgrade. Live upgrade is not supported for this upgrade.
2. For non distruptive upgrade from previous version to v0.5.0, follow [the live upgrade steps here](./docs/upgrade.md#live-upgrade)
For more details about upgrade in Longhorn or upgrade from older versions, [see here](docs/upgrade.md).
# Create Longhorn Volumes # Create Longhorn Volumes