engine: describe how to use the c8d image store with docker-ce

Signed-off-by: David Karlsson <david.karlsson@docker.com>

_data/toc.yaml

@@ -1346,6 +1346,8 @@ manuals:
         title: Use the VFS storage driver
       - path: /storage/storagedriver/aufs-driver/
         title: Use the AUFS storage driver (deprecated)
+      - path: /storage/containerd/
+        title: containerd snapshotters
   - sectiontitle: Networking
     section:
     - path: /network/

storage/containerd.md

@@ -0,0 +1,58 @@
+---
+title: containerd image store with Docker Engine
+keywords: containerd, snapshotters, image store, docker engine
+description: Enabling the containerd image store on Docker Engine
+---
+
+> **Note**
+>
+> The containerd image store is an experimental feature of Docker Engine.
+> If you're using Docker Desktop, don't use the instructions on this page. See
+> [containerd image store with Docker Desktop](../desktop/containerd/index.md).
+
+containerd, the industry-standard container runtime, uses snapshotters instead
+of the classic storage drivers for storing image and container data.
+While the `overlay2` driver still remains the default driver for Docker Engine,
+you can opt in to using containerd snapshotters as an experimental feature.
+
+To learn more about the containerd image store and its benefits, refer to
+[containerd image store on Docker Desktop](../desktop/containerd/index.md).
+
+## Enable containerd image store on Docker Engine
+
+Switching to containerd snapshotters causes you to temporarily lose images and
+containers created using the classic storage drivers.
+Those resources still exist on your filesystem, and you can retrieve them by
+turning off the containerd snapshotters feature.
+
+The following steps explain how to enable the containerd snapshotters feature.
+
+1. Add the following configuration to your `/etc/docker/daemon.json`
+   configuration file:
+
+   ```json
+   {
+     "features": {
+       "containerd-snapshotter": true
+     }
+   }
+   ```
+
+2. Save the file.
+3. Restart the daemon for the changes to take effect.
+
+   ```console
+   $ sudo systemctl restart docker
+   ```
+
+After restarting the daemon, running `docker info` shows that you're using
+containerd snapshotter storage drivers.
+
+{% raw %}
+```console
+$ docker info -f '{{ .DriverStatus }}'
+[[driver-type io.containerd.snapshotter.v1]]
+```
+{% endraw %}
+
+Docker Engine uses the `overlayfs` containerd snapshotter by default.