Buildah

Definition

Buildah is an open-source tool that facilitates building Open Container Initiative (OCI) and Docker container images. It provides a command-line interface to create images from scratch or using existing images, without requiring a running container daemon. Buildah emphasizes security by allowing users to build images in a rootless mode, reducing the attack surface by not needing elevated privileges.

Secure Settings Example

# Build an image in rootless mode
buildah bud --isolation=chroot -t my-secure-image .

This command builds a container image using chroot isolation, which enhances security by minimizing the potential impact of vulnerabilities during the build process.

Insecure Settings Example

# Build an image with root privileges
sudo buildah bud -t my-insecure-image .

Using sudo to build images grants unnecessary root privileges, increasing the risk of privilege escalation and other security vulnerabilities.