docs: update using-SPDK-vhostuser-and-kata.md
Use `ctr` instead of `Docker`.
Fixes:
-# Setup to run SPDK vhost-user devices with Kata Containers and Docker*
+# Setup to run SPDK vhost-user devices with Kata Containers
> **Note:** This guide only applies to QEMU, since the vhost-user storage
> device is only available for QEMU now. The enablement work on other
@@ -222,26 +222,43 @@ minor `0` should be created for it, in order to be recognized by Kata runtime:
$ sudo mknod /var/run/kata-containers/vhost-user/block/devices/vhostblk0 b 241 0
```
-> **Note:** The enablement of vhost-user block device in Kata containers
-> is supported by Kata Containers `1.11.0-alpha1` or newer.
-> Make sure you have updated your Kata containers before evaluation.
-
## Launch a Kata container with SPDK vhost-user block device
-To use `vhost-user-blk` device, use Docker to pass a host `vhost-user-blk`
-device to the container. In docker, `--device=HOST-DIR:CONTAINER-DIR` is used
+To use `vhost-user-blk` device, use `ctr` to pass a host `vhost-user-blk`
+device to the container. In your `config.json`, you should use `devices`
to pass a host device to the container.
-For example:
+For example (only `vhost-user-blk` listed):
+
+```json
+{
+ "linux": {
+ "devices": [
+ {
+ "path": "/dev/vda",
+ "type": "b",
+ "major": 241,
+ "minor": 0,
+ "fileMode": 420,
+ "uid": 0,
+ "gid": 0
+ }
+ ]
+ }
+}
+```
+
+With `rootfs` provisioned under `bundle` directory, you can run your SPDK container:
```bash
-$ sudo docker run --runtime kata-runtime --device=/var/run/kata-containers/vhost-user/block/devices/vhostblk0:/dev/vda -it busybox sh
+$ sudo ctr run -d --runtime io.containerd.run.kata.v2 --config bundle/config.json spdk_container
```
Example of performing I/O operations on the `vhost-user-blk` device inside
container:
```
+$ sudo ctr t exec --exec-id 1 -t spdk_container sh
/ # ls -l /dev/vda
brw-r--r-- 1 root root 254, 0 Jan 20 03:54 /dev/vda
/ # dd if=/dev/vda of=/tmp/ddtest bs=4k count=20
