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Add a warning msg in the upgrade process #217

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Dec 20, 2019
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Add a warning msg in the upgrade process #217

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7 changes: 4 additions & 3 deletions README.md
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Expand Up @@ -124,9 +124,10 @@ Install CSI Driver:
The change from v1alpha1 to v1beta1 snapshot APIs is not backward compatible.

If you have already deployed v1alpha1 snapshot APIs and external-snapshotter sidecar controller and want to upgrade to v1beta1, you need to do the following:
* Delete volume snapshots created using v1alpha1 snapshot CRDs and external-snapshotter sidecar controller.
* Uninstall v1alpha1 snapshot CRDs, external-snapshotter sidecar controller, and CSI driver.
* Install v1beta1 snapshot CRDs, snapshot controller, CSI external-snapshotter sidecar and CSI driver.
* <strong>Note: The underlying snapshots on the storage system will be deleted in the upgrade process!!!</strong>
1. Delete volume snapshots created using v1alpha1 snapshot CRDs and external-snapshotter sidecar controller.
2. Uninstall v1alpha1 snapshot CRDs, external-snapshotter sidecar controller, and CSI driver.
3. Install v1beta1 snapshot CRDs, snapshot controller, CSI external-snapshotter sidecar and CSI driver.


## Testing
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