Buildah vs Skaffold

Buildah is a free command-line tool for building OCI container images on Linux. It can create images from working containers, Dockerfiles, or Containerfiles, and can also build through commands and scripts without a build file. Output can use OCI format or the traditional upstream Docker image format. Builds can run without root privileges, and Buildah follows a fork-exec model rather than running as a daemon. Its commands create, mount, unmount, delete, and rename working containers, as well as create or delete images; users can also pull images from a specified location and push local images elsewhere. Buildah is based on a Go API that other tools can vendor, and Podman uses it for Dockerfile builds while remaining independently installable. Buildah requires a kernel with OverlayFS or fuse-overlayfs support; RHEL or CentOS requires version 7.4 or later. Installation guidance warns that short image names can be spoofed and recommends fully qualified names from trusted registries or pulling by digest. The project points users to tutorials, releases, and a mailing list for questions.

Skaffold is Google’s open-source project for building, pushing and deploying applications. It runs client-side and has no component installed on a cluster. In development mode, it watches source files and can rebuild images, synchronize files, test images and redeploy when changes are detected. Its command-line interface can build, test, render, apply, deploy and clean application artifacts. Listed capabilities include policy-based image tagging, resource port-forwarding, logging and file syncing. Builder integrations include Docker, Jib, Bazel, custom builders, Buildpacks and ko. Deployment options include kubectl, kpt, Helm, Docker, Google Cloud Run, Kustomize and Render. Cloud Code provides extensions for Visual Studio Code and JetBrains IDEs. Skaffold supports Linux, macOS and Windows and is listed at free as an open-source project with standalone CLI and IDE integrations. It checks Google servers for updates by default, although that check can be disabled. Installation documentation says anonymized usage data is collected with an opt-out. Its gRPC server is not compatible with HTTPS.