Chainguard Container for pypy

PyPy is a fast and compliant implementation of the Python language.

Chainguard Containers are regularly-updated, secure-by-default container images.

Download this Container Image

For those with access, this container image is available on cgr.dev:

docker pull cgr.dev/ORGANIZATION/pypy:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Compatibility Notes

This image is comparable to the pypy/pypy image, with the following differences:

• Like all other Chainguard Images, pypy features a stripped down, minimal design
• It has few-to-zero CVEs
• It does not run as the root user

Getting Started

The PyPy Chainguard Image provides a minimal PyPy runtime suitable for workloads such as web applications, CLI utilities, interfacing with APIs, or other tasks. Currently Pypy only supports pypy-3.11 and pypy-3.10 which are also available as chainguard images.

Variants

We have two image variants available:

• A pypy:latest-dev variant that contains the pip, pypy, and apk package managers and the bash, ash, and sh shells.
• A minimal runtime variant that removes shells and package managers for additional security. To pull the minimal runtime variant from cgr.dev, run the following:

docker pull cgr.dev/<ORGANIZATION>/pypy:latest

The minimal runtime can be used to run an application that doesn't need non system wide packages and or a linux shell. An example hash.py function is given below;

import hashlib

def generate_hash(text: str, algorithm: str = "sha256") -> str:
    """
    Generate a hash of the given text using the specified algorithm.

    :param text: The input string to hash.
    :param algorithm: The hashing algorithm (e.g., 'md5', 'sha1', 'sha256', 'sha512').
    :return: The hexadecimal hash string.
    """
    try:
        hasher = hashlib.new(algorithm)
        hasher.update(text.encode("utf-8"))
        return hasher.hexdigest()
    except ValueError:
        return f"Error: Unsupported hashing algorithm '{algorithm}'"

# Example usage
print(generate_hash("Hello, World!", "sha256"))
print(generate_hash("Hello, World!", "md5"))
print(generate_hash("Hello, World!", "sha1"))

To execute the code above in a pypy container, run the following

FROM cgr.dev/<ORGANIZATION>/pypy:latest

WORKDIR /app

COPY app.py app.py

ENTRYPOINT ["pypy3", "-c", "/app/hash.py"]

To pull the dev variant, run this command:

docker pull cgr.dev/<ORGANIZATION>/pypy:latest-dev

To access the shell in the pypy:latest-dev image, you'll need to include an --entrypoint option, as in the following example:

docker run -it --entrypoint /bin/bash cgr.dev/<ORGANIZATION>/pypy:latest-dev

Usage with Dockerfiles

If you require additional packages that can be installed with the pip package manager, we recommend using a multistage build. This process involves installing packages in a virtual environment using the latest-dev variant, then copying this environment over to the minimal runtime image.

The following is a minimal example of a Dockerfile that uses a multistage build to run an app.py script after installing dependencies:

#!/usr/bin/env python

from flask import Flask

app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello, World!"

# syntax=docker/dockerfile:1

FROM cgr.dev/<ORGANISATION>/pypy:latest-dev as dev

WORKDIR /app

COPY requirements.txt requirements.txt
RUN pip install flask

FROM cgr.dev/<ORGANIZATION>/pypy:latest

WORKDIR /app

COPY app.py app.py

ENTRYPOINT ["pypy3", "-m", "flask", "--app", "/app/hello.py", "run", "--host", "0.0.0.0"]

Documentation and Resources

For more information, please refer to the following resources:

• Official documentation for PyPy
• PyPy github repository
• RPython framework

What are Chainguard Containers?

Chainguard Containers are minimal container images that are secure by default.

In many cases, the Chainguard Containers tagged as :latest contain only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager. Chainguard Containers are built with Wolfi, our Linux undistro designed to produce container images that meet the requirements of a more secure software supply chain.

The main features of Chainguard Containers include:

• Minimal design, without unnecessary software bloat
• Daily builds to ensure container images are up-to-date with available security patches
• High quality build-time SBOMs attesting to the provenance of all artifacts within the image
• Verifiable signatures provided by Sigstore
• Reproducible builds with Cosign and apko (read more about reproducibility)

For cases where you need container images with shells and package managers to build or debug, most Chainguard Containers come paired with a -dev variant.

Although the -dev container image variants have similar security features as their more minimal versions, they feature additional software that is typically not necessary in production environments. We recommend using multi-stage builds to leverage the -dev variants, copying application artifacts into a final minimal container that offers a reduced attack surface that won’t allow package installations or logins.

Learn More

To better understand how to work with Chainguard Containers, please visit Chainguard Academy and Chainguard Courses.

In addition to Containers, Chainguard offers VMs and Libraries. Contact Chainguard to access additional products.

Trademarks

This software listing is packaged by Chainguard. The trademarks set forth in this offering are owned by their respective companies, and use of them does not imply any affiliation, sponsorship, or endorsement by such companies.