RsCNI

RsCNI is a CNI plugin library for Rust. This is based on containernetworking/cni.

[!WARNING] RsCNI is under experimental.

Use

RsCNI has a similar APIs to containernetworking/cni/pkg/skel.

The entrypoint structure is Plugin. It accepts callback functions defined as CmdFn to represent CNI Add, Del and Check commands.

pub struct Plugin {
    add: CmdFn,
    del: CmdFn,
    check: CmdFn,
    version_info: PluginInfo,
    about: String,
    dispatcher: Dispatcher,
}

CmdFn is the type for CNI commands. It is the function type that accepts Args that is CNI arguments and return CNIResult or Error. As we implement some functions satisfy this type, we can build our own CNI plugin.

pub type CmdFn = fn(args: Args) -> Result<CNIResult, Error>;

For async version, we have to implement the following type.

[!NOTE] To use async version of rscni, please enable the async feature in your Cargo.toml.

pub type CmdFn = fn(Args) -> Pin<Box<dyn Future<Output = Result<CNIResult, Error>>>>;

To run Plugin, we can call run() method like following.

fn main() {
    let version_info = PluginInfo::default();
    let mut dispatcher = Plugin::new(add, del, check, version_info, ABOUT_MSG);

    dispatcher.run().expect("Failed to complete the CNI call");
}

For details, please see examples/rscni-debug.

Example project

• rscni-debug

• async-rscni-debug

License

RsCNI is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.