dkron

packaged by Chainguard

Chainguard Container for dkron

Minimal Wolfi-based Dkron image. Dkron is a distributed, fault-tolerant job scheduling system for cloud native environments.

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/dkron: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 dkron image is based on the upstream Dkron project and maintains full compatibility with the official Dkron distribution. This image provides the same functionality as the upstream container with the following benefits:

• Built on Wolfi, providing a more secure foundation with fewer vulnerabilities
• Regularly updated with the latest security patches
• Minimal attack surface with only essential dependencies included
• Verifiable signatures and SBOMs for enhanced supply chain security

There are no breaking changes compared to the upstream Dkron container.

Getting Started

The dkron image can be used as a drop-in replacement for the upstream Dkron container. Here are several ways to get started:

Single Server Mode

To run Dkron in single server mode:

docker run --rm -p 8080:8080 -p 8946:8946 \
  -e DKRON_NODE_NAME=server1 \
  -e DKRON_SERVER=true \
  -e DKRON_BOOTSTRAP_EXPECT=1 \
  cgr.dev/ORGANIZATION/dkron:latest agent

You can then access the web interface at http://localhost:8080.

Multi-Server Cluster

For a production cluster, you can start multiple servers. First, start the bootstrap server:

docker run --rm -p 8080:8080 -p 8946:8946 \
  -e DKRON_NODE_NAME=server1 \
  -e DKRON_SERVER=true \
  -e DKRON_BOOTSTRAP_EXPECT=3 \
  cgr.dev/ORGANIZATION/dkron:latest agent

Using Helm

You can deploy Dkron using Helm with a values file:

cat > dkron-values.yaml <<EOF
image:
  repository: cgr.dev/ORGANIZATION/dkron
  tag: latest
  pullPolicy: IfNotPresent
EOF

helm install dkron \
  https://raw.githubusercontent.com/distribworks/dkron-helm/master/dkron-2.0.3.tgz \
  -f dkron-values.yaml

For more advanced configuration options, refer to the official Dkron documentation.

Documentation and Resources

• Official Dkron Documentation
• Dkron API Reference
• Dkron GitHub Repository
• Dkron Helm Chart
• Chainguard Academy for container security best practices

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.