mirror of https://github.com/docker/docs.git
desktop/enable wasm setting (#17545)
* desktop: update instruction for enabling wasm Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com> * desktop: rephrase wording used for the wasm integration Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com> * desktop: update wasm examples Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com> --------- Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>
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@ -1163,7 +1163,7 @@ manuals:
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- path: /desktop/containerd/
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title: containerd image store (Beta)
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- path: /desktop/wasm/
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title: Wasm (Beta)
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title: Wasm workloads (Beta)
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- sectiontitle: WSL
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section:
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- path: /desktop/wsl/
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@ -1,6 +1,6 @@
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---
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title: Docker+Wasm (Beta)
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description: How to use the Wasm integration in Docker Desktop
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title: Wasm workloads (Beta)
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description: How to run Wasm workloads with Docker Desktop
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keywords: Docker, WebAssembly, wasm, containerd, engine
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toc_max: 3
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---
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@ -15,23 +15,31 @@ alongside your Linux containers in Docker.
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> **Beta**
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>
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> The Docker+Wasm feature is currently in
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> [Beta](../../release-lifecycle.md/#beta). We recommend that you do not use
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> this feature in production environments as this feature may change or be
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> removed from future releases.
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> The Wasm feature is currently in [Beta](../../release-lifecycle.md/#beta).
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> We recommend that you do not use this feature in production environments as
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> this feature may change or be removed from future releases.
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## Turn on the Docker+Wasm integration
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## Enable Wasm workloads
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To use the Docker+Wasm integration, developers must turn on the
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[containerd image store](../containerd/index.md) feature.
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Wasm workloads require the [containerd image store](../containerd/index.md)
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feature to be enabled. If you’re not already using the containerd image store,
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then pre-existing images and containers will be inaccessible.
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> **Important**
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>
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> The Docker+Wasm integration requires the
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> [containerd image store](../containerd/index.md) feature. If you’re not
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> already using the containerd image store, then pre-existing images and
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> containers will be inaccessible.
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{: .important}
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1. Open the Docker Desktop **Settings**.
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2. Go to the **Features in development** tab.
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3. Check the following checkboxes:
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- **Use containerd for storing and pulling images**
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- **Enable Wasm**
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4. Select **Apply & restart** to save the settings.
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5. In the confirmation dialog, select **Install** to install the Wasm runtimes.
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Docker Desktop downloads and installs the following runtimes that you can use
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to run Wasm workloads:
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- `io.containerd.slight.v1`
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- `io.containerd.spin.v1`
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- `io.containerd.wasmedge.v1`
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- `io.containerd.wasmtime.v1`
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## Usage examples
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@ -40,11 +48,10 @@ To use the Docker+Wasm integration, developers must turn on the
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The following `docker run` command starts a Wasm container on your system:
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```console
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$ docker run -dp 8080:8080 \
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--name=wasm-example \
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$ docker run \
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--runtime=io.containerd.wasmedge.v1 \
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--platform=wasi/wasm32 \
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michaelirwin244/wasm-example
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--platform=wasi/wasm \
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secondstate/rust-example-hello
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```
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After running this command, you can visit [http://localhost:8080/](http://localhost:8080/) to see the "Hello world" output from this example module.
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@ -57,7 +64,7 @@ Note the `--runtime` and `--platform` flags used in this command:
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- `--runtime=io.containerd.wasmedge.v1`: informs the Docker engine that you want
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to use the Wasm containerd shim instead of the standard Linux container
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runtime
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- `--platform=wasi/wasm32`: specifies the architecture of the image you want to
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- `--platform=wasi/wasm`: specifies the architecture of the image you want to
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use. By leveraging a Wasm architecture, you don’t need to build separate
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images for the different machine architectures. The Wasm runtime takes care of
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the final step of converting the Wasm binary to machine instructions.
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@ -69,11 +76,9 @@ The same application can be run using the following Docker Compose file:
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```yaml
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services:
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app:
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image: michaelirwin244/wasm-example
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platform: wasi/wasm32
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image: secondstate/rust-example-hello
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platform: wasi/wasm
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runtime: io.containerd.wasmedge.v1
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ports:
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- 8080:8080
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```
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Start the application using the normal Docker Compose commands:
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@ -126,12 +131,12 @@ running in a container.
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server latest 2c798ddecfa1 2 minutes ago 3MB
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```
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Inspecting the image shows the image has a `wasi/wasm32` platform, a
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Inspecting the image shows the image has a `wasi/wasm` platform, a
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combination of OS and architecture:
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```console
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$ docker image inspect server | grep -A 3 "Architecture"
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"Architecture": "wasm32",
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"Architecture": "wasm",
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"Os": "wasi",
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"Size": 3001146,
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"VirtualSize": 3001146,
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@ -156,14 +161,14 @@ running in a container.
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# syntax=docker/dockerfile:1
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FROM scratch
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COPY --from=build /build/hello_world.wasm /hello_world.wasm
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ENTRYPOINT [ "hello_world.wasm" ]
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ENTRYPOINT [ "/hello_world.wasm" ]
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```
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3. Build and push the image specifying the `wasi/wasm32` architecture. Buildx
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3. Build and push the image specifying the `wasi/wasm` architecture. Buildx
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makes this easy to do in a single command.
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```console
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$ docker buildx build --platform wasi/wasm32 -t username/hello-world .
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$ docker buildx build --platform wasi/wasm -t username/hello-world .
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...
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=> exporting to image 0.0s
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=> => exporting layers 0.0s
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@ -193,7 +198,7 @@ in Docker Desktop settings and try again.
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### Failed to start shim: failed to resolve runtime path
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If you use an older version of Docker Desktop that doesn't support running Wasm
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containers, you will see an error message similar to the following:
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workloads, you will see an error message similar to the following:
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```
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docker: Error response from daemon: failed to start shim: failed to resolve runtime path: runtime "io.containerd.wasmedge.v1" binary not installed "containerd-shim-wasmedge-v1": file does not exist: unknown.
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@ -213,7 +218,7 @@ Update your Docker Desktop to the latest version and try again.
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## Feedback
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Thanks for trying the new Docker+Wasm integration. Give feedback or report any
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Thanks for trying out Wasm workloads with Docker. Give feedback or report any
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bugs you may find through the issues tracker on the
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[public roadmap item](https://github.com/docker/roadmap/issues/426){:
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target="_blank" rel="noopener" class="_"}.
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