flyteplugins-rs

[!WARNING] Experimental, and not yet published. The examples in this repository import it from source; APIs may change.

Launch Rust Flyte tasks from Python.

A Rust task container runs a compiled binary and no Python. This package is the launch-time half: it reads a worker binary's self-described interface, declares the matching Flyte task, and builds the worker image from Rust sources.

from pathlib import Path

import flyteplugins_rs as rs

import interface_gen  # generated by `<binary> describe-interface`

my_task, rust_env = rs.rust_task(
    crate_dir=Path(__file__).parent,
    binary="hello-trace",
    fallback_descriptor=interface_gen.DESCRIPTOR,
    retries=2,          # any TaskTemplate option passes through
)

flyte run task.py my_task --x 21 --label demo

The task's name, inputs, and outputs are never written here — they come from the Rust fn signature, so renaming a parameter cannot silently diverge from what gets launched.

rust_env is the environment holding the task. A Python parent calling it needs depends_on=[rust_env], which carries the worker image into the deployment plan:

env = flyte.TaskEnvironment(name="my_pipeline", depends_on=[rust_env])

@env.task
async def pipeline(x: int) -> str:
    return await my_task(x=x, label="demo")

What it does

  • Interface — runs <binary> describe-interface when a local build exists, and refreshes the generated interface_gen.py from it. Inside a container (no cargo build) the generated module is used instead.
  • Image — declares the worker image as flyte.Image layers, so the remote image builder can compile it (no Dockerfile, no local docker). No layer asks for Python, so the image gets no venv.
  • Task — a container task typed rust-task, whose args match the worker's contract, and whose args[0] is the binary (image layers cannot set an ENTRYPOINT).

Key dates

PyPI data
Data sourced directly from PyPI's database.
  • Released:
Newer release available (0.0.3)

1 maintainer

PyPI data
Data sourced directly from PyPI's database.
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License

Apache-2.0

Requires

Python >=3.10

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