Rust

Summary

Item	Value
API name	rust
source OCI image	rust:1-alpine
per-job resource ceiling	2 vCPU, 1024 MiB

The vCPU and RAM ceiling exists to prevent abuse; libkrun memory is elastic and the host only pays for what the guest touches.

Warmup

None: the official image already ships everything needed.

How the code is executed

The main file (the first in files) is compiled with rustc -o <binary> <file> and the binary is run with the job's stdin. A compilation error returns exception: "Compilation failed", with the rustc output in stderr. With no network, external crates are not available. Everything runs in a directory under /tmp (tmpfs), in a fresh VM destroyed at the end of the job.

Building the image

rc image build --stack rust

Example

curl -s http://127.0.0.1:8080/api/v1/run \
  -H 'Content-Type: application/json' \
  -d '{
    "language": "rust",
    "files": [
      {"name": "main.rs", "content": "fn main() {\n    println!(\"{}\", 6 * 7);\n}\n"}
    ]
  }'

Expected stdout: 42.