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 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.