Chainguard Container for ruby-fips

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/ruby-fips:latest

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

Compatibility Notes

The Chainguard ruby-fips image is based on the ruby image. Like other Chainguard Containers, ruby-fips was built with minimalism and security in mind, and has the following differences from the ruby image:

• Does not run as the root user
• Contains only the minimum packages needed to operate
• Bundler typically installs to /home/nonroot instead of /usr/lib/bundle
• Environment variables, especially gem paths, sometimes differ from the official Ruby image
• Does not default to using UTF-8 encoding (you will need to specify this yourself)
• Ruby applications requiring third-party dependencies through Rubygems may need multi-stage builds using -dev variants

FIPS Support

This Chainguard Container ships with a validated redistribution of OpenSSL's FIPS provider module. For more on FIPS support in Chainguard Containers, consult the guide on FIPS-enabled Chainguard Images on Chainguard Academy.

Getting Started

Create a Ruby script:

cat > hello.rb <<EOF
require 'openssl'

puts "Ruby version: #{RUBY_VERSION}"
puts "FIPS mode: #{OpenSSL.fips_mode}"
puts "Hello from Ruby!"
EOF

Run the script:

docker run --rm -v $(pwd):/workspace -w /workspace \
  cgr.dev/ORGANIZATION/ruby-fips:latest hello.rb

To verify FIPS mode is enabled:

docker run --rm cgr.dev/ORGANIZATION/ruby-fips:latest ruby -r 'openssl' -e 'puts "FIPS mode: #{OpenSSL.fips_mode}"'

Documentation and Resources

• Ruby Documentation
• Getting Started with the Ruby Chainguard Image

What are Chainguard Containers?

Chainguard's free tier of Starter container images are built with Wolfi, our minimal Linux undistro.

All other Chainguard Containers are built with Chainguard OS, Chainguard's minimal Linux operating system 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 development, or -dev, variant.

In all other cases, including Chainguard Containers tagged as :latest or with a specific version number, the container images include only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager.

Although the -dev container image variants have similar security features as their more minimal versions, they include additional software that is typically not necessary in production environments. We recommend using multi-stage builds to copy artifacts from the -dev variant into a more minimal production image.

Need additional packages?

To improve security, Chainguard Containers include only essential dependencies. Need more packages? Chainguard customers can use Custom Assembly to add packages, either through the Console, chainctl, or API.

To use Custom Assembly in the Chainguard Console: navigate to the image you'd like to customize in your Organization's list of images, and click on the Customize image button at the top of the page.

Learn More

Refer to our Chainguard Containers documentation on Chainguard Academy. Chainguard also offers VMs and Libraries — contact us for access.

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.