wasmtime / issue #9849 Network access example · git-wasmtime

I am trying to use container2wasm to run a Linux VM inside wasmtime. Here is my code:

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    // Create a new Wasmtime engine and store with unit data.
    // Construct the wasm engine with async support enabled.
    let mut config = Config::new();
    config.async_support(true);
    let engine = Engine::new(&config)?;

    // Embed the WebAssembly module into the binary.
    let wasm_bytes = include_bytes!("../images/ubuntu:22.04.wasm");

    // Create a linker to link the WASI module.
    let mut linker: Linker<WasiP1Ctx> = Linker::new(&engine);
    preview1::add_to_linker_async(&mut linker, |t| t)?;

    // Create a WASI context and put it in a Store; all instances in the store
    // share this context. `WasiCtxBuilder` provides a number of ways to
    // configure what the target program will have access to.
    let wasi_ctx = WasiCtxBuilder::new()
        .inherit_stdio()
        .inherit_network()
        .socket_addr_check(|_, _| Box::pin(ready(true)))
        .allow_ip_name_lookup(true)
        .allow_tcp(true)
        .allow_udp(true)
        .build_p1();
    let mut store = Store::new(&engine, wasi_ctx);

    // Load the WebAssembly module from the embedded bytes.
    let module = Module::new(&engine, wasm_bytes)?;
    let func = linker
        .module_async(&mut store, "", &module)
        .await?
        .get_default(&mut store, "")?
        .typed::<(), ()>(&store)?;

    // Create an instance of the module with a mutable store.
    func.call_async(&mut store, ()).await?;

    Ok(())
}

It works great and I have access to a shell/prompt. But for some reason, network requests fail:

$ cargo run --release
    Finished `release` profile [optimized] target(s) in 0.07s
     Running `target/release/prositronic`
root@localhost:/# apt-get update
apt-get update
Ign:1 http://security.ubuntu.com/ubuntu jammy-security InRelease
Ign:2 http://archive.ubuntu.com/ubuntu jammy InRelease
Ign:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
Ign:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
Ign:1 http://security.ubuntu.com/ubuntu jammy-security InRelease
Ign:2 http://archive.ubuntu.com/ubuntu jammy InRelease
Ign:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
Ign:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
Ign:2 http://archive.ubuntu.com/ubuntu jammy InRelease
Ign:1 http://security.ubuntu.com/ubuntu jammy-security InRelease
Ign:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
Ign:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
Err:1 http://security.ubuntu.com/ubuntu jammy-security InRelease
  Temporary failure resolving 'security.ubuntu.com'
Err:2 http://archive.ubuntu.com/ubuntu jammy InRelease
  Temporary failure resolving 'archive.ubuntu.com'
Err:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
  Temporary failure resolving 'archive.ubuntu.com'
Err:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
  Temporary failure resolving 'archive.ubuntu.com'
Reading package lists... Done
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease  Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease  Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease  Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease  Temporary failure resolving 'security.ubuntu.com'
W: Some index files failed to download. They have been ignored, or old ones used instead.
root@localhost:/#

Stream: git-wasmtime

Topic: wasmtime / issue #9849 Network access example

Wasmtime GitHub notifications bot (Dec 18 2024 at 11:26):