dinker
apko
dinker | apko | |
---|---|---|
2 | 14 | |
12 | 1,078 | |
- | 6.8% | |
10.0 | 9.4 | |
3 months ago | 1 day ago | |
Go | Go | |
ISC License | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
dinker
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Crafting container images without Dockerfiles
(Self plug) I had the same thoughts as the author, and made this: https://github.com/andrewbaxter/dinker . Like stated in the article, if you're doing rust or go all you want is to dump the binary in the image. There's no reason to do the build inside the docker vm in that case, and it's super fast, and only uses dumb filesystem access - no daemons like docker, weird wip container managers like buildah, etc.
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Rails on Docker ยท Fly
Self hoisting here, I put this together to make it easier to generate single (extra) layer docker images without needing a docker agent, capabilities, chroot, etc: https://github.com/andrewbaxter/dinker
Caveat: it doesn't work on Fly.io. They seem to be having some issue with OCI manifests: https://github.com/containers/skopeo/issues/1881 . They're also having issues with new docker versions pushing from CI: https://community.fly.io/t/deploying-to-fly-via-github-actio... ... the timing of this post seems weird.
FWIW the article says
> create a Docker image, also known as an OCI image
I don't think this is quite right. From my investigation, Docker and OCI images are basically content addressed trees, starting with a root manifest that points to other files and their hashes (root -> images -> layers -> layer configs + files). The OCI manifests and configs are separate to Docker manifests and configs and basically Docker will support both side by side.
apko
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Distroless images using melange and apko
apko allows us to build OCI container images from .apk packages.
- Build OCI images from APK packages directly without Dockerfile
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Docker Is Four Things
We have built something very similar to what you are describing: https://github.com/chainguard-dev/apko
- Apko: APK-based OCI image builder
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Tool to build Docker images
apko
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An Overview of Kubernetes Security Projects at KubeCon Europe 2023
Chainguard also appears to have several open source projects.The most popular one is apko, used for building OCI images from APK packages.
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aws-cli v2: how much smaller can it get? Answer: a lot smaller :)
Once those are done, I just need to build aws-cli package, put those APK files in a final image with Chainguard's apko.
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Crafting container images without Dockerfiles
This is one of my absolute favorite topics. Pardon me while I rant and self-promote :D
Dockerfiles are great for flexibility, and have been a critical contributor to the adoption of Docker containers. It's very easy to take a base image, add a thing to it, and publish your version.
Unfortunately Dockerfiles are also full of gotchas and opaque cargo-culted best practices to avoid them. Being an open-ended execution environment, it's basically impossible to tell even during the build what's being added to the image, which has downstream implications for anybody trying to get an SBOM from the image for example.
Instead, I contribute to a number of tools to build and manage images without Dockerfiles. Each of them are less featureful than Dockerfiles, but being more constrained in what they can do, you can get a lot more visibility into what they're doing, since they're not able to do "whatever the user wants".
1. https://github.com/google/go-containerregistry is a Go module to interact with images in the registry and in tarballs and layouts, in the local docker daemon. You can append layers, squash layers, modify metadata, etc.
2. crane is a CLI that uses the above (in the same repo) to make many of the same modifications from the commandline. `crane append` for instance adds a layer containing some contents to an image, entirely in the registry, without even pulling the base image.
3. ko (https://ko.build) is a tool to build Go applications into images without Dockerfiles or Docker at all. It runs `go build`, appends that binary on top of a base image, and pushes it directly to the registry. It generates an SBOM declaring what Go modules went into the app it put into the image, since that's all it can do.
4. apko (https://apko.dev) is a tool to assemble an image from pre-built apks, without Docker. It's capable of producing "distroless" images easily with config in YAML. It generates an SBOM declaring exactly what apks it put in the image, since that's all it can do.
Bazel's rules_docker is another contender in the space, and GCP's distroless images use it to place Debian .debs into an image. Apko is its spiritual successor, and uses YAML instead of Bazel's own config language, which makes it a lot easier to adopt and use (IMO), with all of the same benefits.
I'm excited to see more folks realizing that Dockerfiles aren't always necessary, and can sometimes make your life harder. I'm extra excited to see more tools and tutorials digging into the details of how container images work, and preaching the gospel that they can be built and modified using existing tooling and relatively simple libraries. Excellent article!
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Vulnerability scanner written in Go that uses osv.dev data
Depends exactly what you're trying to create it for. I advocate for doing it during the build process rather than as a step after.
We open sourced a few tools that do it automatically for containers:
https://github.com/chainguard-dev/apko
https://github.com/chainguard-dev/melange
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Apko: A Better Way To Build Containers?
apko takes apk packages and builds them into OCI images (aka Docker images). Sounds quite simple, because it is:
What are some alternatives?
buildah - A tool that facilitates building OCI images.
distroless - ๐ฅ Language focused docker images, minus the operating system.
manifest-tool - Command line tool to create and query container image manifest list/indexes
docker-pushmi-pullyu - Copy Docker images directly to a remote host without using Docker Hub or a hosted registry.
bazel-nix-example
containerd - An open and reliable container runtime
lamby - ๐๐ค Simple Rails & AWS Lambda Integration
melange - build APKs from source code
nix2container - An archive-less dockerTools.buildImage implementation
osv-scanner - Vulnerability scanner written in Go which uses the data provided by https://osv.dev
dockerfile-rails - Provides a Rails generator to produce Dockerfiles and related files.
nerdctl - contaiNERD CTL - Docker-compatible CLI for containerd, with support for Compose, Rootless, eStargz, OCIcrypt, IPFS, ...