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docs: update using-SPDK-vhostuser-and-kata.md

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Use `ctr` instead of `Docker`.

Fixes: #3054

Signed-off-by: bin <bin@hyper.sh>
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bin 2021-11-17 22:50:15 +08:00
parent e34893a0c4
commit 46fd5069c9
1 changed files with 26 additions and 9 deletions
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docs/use-cases/using-SPDK-vhostuser-and-kata.md
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@ -1,4 +1,4 @@
# 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