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Fix design doc link
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k8s-ci-robot authored and xing-yang committed Jul 2, 2018
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Expand Up @@ -278,7 +278,7 @@ type StorageClass struct {
![CSI Snapshot Diagram](csi-snapshot_diagram.png?raw=true "CSI Snapshot Diagram")


External snapshotter is part of Kubernetes implementation of [Container Storage Interface (CSI)](https://github.com/container-storage-interface/spec). It is an external controller that monitors `VolumeSnapshot` and `VolumeSnapshotData` objects and creates/deletes snapshot from volumes. The original CSI design can be found at Kubernetes proposal at https://github.com/kubernetes/community/blob/master/contributors/design-proposals/storage/container-storage-interface.md.
External snapshotter is part of Kubernetes implementation of [Container Storage Interface (CSI)](https://github.com/container-storage-interface/spec). It is an external controller that monitors `VolumeSnapshot` and `VolumeSnapshotData` objects and creates/deletes snapshot from volumes. The original Kubernetes CSI design can be found at Kubernetes [design proposal](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/storage/container-storage-interface.md).

External snapshotter follows [controller](https://github.com/kubernetes/community/blob/master/contributors/devel/controllers.md) pattern and uses informers to watch for `VolumeSnapshot` and `VolumeSnapshotData` create/update/delete events. It filters out `VolumeSnapshot` instances with `Snapshotter==<CSI driver name>` and processes these events in workqueues with exponential backoff. Real handling is deferred to the `Handler` interface.

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