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Skopeo

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description Skopeo Overview

Skopeo is an open-source command-line tool that inspects and analyzes container images, providing information like layers, manifests, history, and vulnerabilities without requiring Docker daemon access.

help Skopeo FAQ

What does Skopeo do that Docker CLI cannot?

Skopeo can inspect, copy, and sign container images without requiring a running Docker daemon, making it ideal for CI/CD pipelines and headless environments. It can also directly copy images between registries—for example from Docker Hub to a private registry—without pulling them to local disk first.

How do you install Skopeo on Linux?

Skopeo is available through standard package managers on most Linux distributions, including 'dnf install skopeo' on Fedora and RHEL-based systems, and 'apt install skopeo' on Debian and Ubuntu. It can also be installed from source via its GitHub repository under the containers project organization.

Can Skopeo copy images between different container registries?

Yes, the 'skopeo copy' command is one of the tool's primary features, allowing users to copy container images directly between registries such as Docker Hub, Quay.io, Amazon ECR, and private Harbor instances. This eliminates the need to pull and push images manually through a local Docker daemon.

Is Skopeo related to Podman and Buildah?

Yes, Skopeo is part of the same open-source containers tooling ecosystem as Podman and Buildah, all maintained under the Red Hat-led containers GitHub organization. While Podman runs containers and Buildah builds them, Skopeo handles image inspection, copying, signing, and management tasks.

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