CWASI Containerd shim

CWASI is a WebAssembly OCI-compliant runtime shim that identifies and selects the best inter-function data exchange approach based on serverless functions location. We got inspired by RunWasi Wasmedge.

Features

• Novel model for serverless function communication
• Wasm modules static linking via function embedding
• Co-hosted function communication optimization via kernel buffer
• Remote function communication via message broker

Prerequisites

• Rust
• Containerd
• Wasmedge -v 0.11.2
• Redis
• Cri-tools for execution

Installation

cargo build --release

Copy binary to $PATH

sudo cp target/release/containerd-shim-cwasi-v1 /usr/local/bin/containerd-shim-cwasi-v1

Usage

Example 1
export REDIS_IP=<redis-ip>
sudo crictl pull docker.io/wasmedge/example-wasi:latest
sudo ctr -n k8s.io run  --runtime=io.containerd.cwasi.v1 --annotation cwasi.secondary.function=true --net-host=true docker.io/wasmedge/example-wasi:latest cwasi /wasi_example_main.wasm 50000000

Example 2
export REDIS_IP=<redis-ip>
sudo crictl pull docker.io/keniack/alice-wasm-app:latest
sudo crictl pull docker.io/keniack/my_math_lib:latest
sudo ctr -n k8s.io run --rm --runtime=io.containerd.cwasi.v1 --annotation cwasi.secondary.function=true --net-host=true docker.io/keniack/alice-wasm-app:latest cwasi /alice-wasm-app.wasm 5 10

Contributing

Contributions are welcome! We would like to hear it from you. For any questions or suggestions open an issue or start a discussion. For contributions please fork this repository and open a pull request with your changes.