Chainguard Container for dart

Container image for dart programming 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/dart:latest

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

Overview

cgr.dev/chainguard/dart:latest is a base image that can be used with your dart applications.

Usage

Create a webserver application

dart create -t server-shelf webserver

We'll make some changes in the Dockerfile now.

The base image will be changed to cgr.dev/chainguard/dart:latest This image contains latest stable version of dart sdk. Given Chainguard image by default ships with nonroot user, we'll need to update our COPY instructions in Dockerfile. After updating the instructions will look following:

COPY --chown=nonroot:nonroot pubspec.* ./
COPY --chown=nonroot:nonroot  . .

The final Dockerfile is following:

FROM cgr.dev/chainguard/dart:latest AS build

WORKDIR /app
COPY --chown=nonroot:nonroot pubspec.* ./
RUN ["dart", "pub", "get"]

COPY --chown=nonroot:nonroot . .
RUN ["dart", "compile", "exe", "bin/server.dart", "-o", "bin/server"]

FROM cgr.dev/chainguard/dart-runtime:latest
COPY --from=build /app/bin/server /app/bin/

EXPOSE 8080
CMD ["/app/bin/server"]

Build the application by invoking the following command:

docker build -t k3d-k3d.localhost:5005/webserver  . --no-cache --push

Run the application in detached mode:

docker run --rm -d -p 8080:8080 k3d-k3d.localhost:5005/webserver
curl localhost:8080
Hello, World!

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.