![]() img claims to be daemonless, but it uses buildkit so is probably doing some trickery there. The project was quite active until late 2018 and has only received a few patches since. That said, I haven't seen traction with it compared to the other options mentioned. Img - img was written by Jess Frazelle and is often quoted in these sorts of guides and is a wrapper for buildkit. They are forking the daemon and then killing it after a build. buildkit currently only runs as a daemon, but you will hear people claim otherwise. Stand-alone buildkit - buildkit was started by Tõnis Tiigi from Docker Inc as a brand new container builder with caching and concurrency in mind. There's also more of a focus on image distribution and strong isolation. It uses containerd just like Docker, and supports both container-level isolation with runc and "lightweight VMs" such as runV. Pouch - from Alibaba, pouch is billed as "An Efficient Enterprise-class Container Engine". Podman is marketed as being daemonless and rootless, but still ends up having to mount overlay filesystems and use a UNIX socket. Podman and buildah combination - RedHat / IBM's effort, which uses their own OSS toolchain to generate OCI images. There are a few efforts that attempt to strip "docker" back to its component pieces, the original UX we all fell in love with:ĭocker - docker itself now uses containerd to run containers, and has support for enabling buildkit to do highly efficient, caching builds. Update for Nov 2020: anyone using Docker's set of official base-images should also read: Preparing for the Docker Hub Rate Limits Alternatives to Docker The main Docker CLI has become a lot more than build/ship/run, and also lugs around several years of baggage, it now comes bundled with Docker Swarm and EE features. Nothing as such, Docker runs well on armhf, arm64, and on x86_64. ![]() I'll then wrap things up and let you know how to get in touch with suggestions, feedback and your own stories around wants and needs in container tooling. This post covers tooling which can build an image from a Dockerfile, and so anything which limits the user to only Java (jib) or Go (ko) for instance is out of scope. ![]() The first option in the post will show how to use the built-in buildkit option for Docker's CLI, then buildkit stand-alone (on Linux only), followed by Google's container builder, Kaniko. The easiest way to think about OpenFaaS is as a CaaS platform for Kubernetes which can run microservices, and add in FaaS and event-driven tooling for free. I'll use OpenFaaS as the case-study, which uses OCI-format container images for its workloads. In this post I'll outline several ways to build containers without the need for Docker itself.
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