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Installing Skopeo

Distribution Packages

skopeo may already be packaged in your distribution.

Fedora

sudo dnf -y install skopeo

RHEL/CentOS ≥ 8 and CentOS Stream

sudo dnf -y install skopeo

RHEL/CentOS ≤ 7.x

sudo yum -y install skopeo

openSUSE

sudo zypper install skopeo

Alpine

sudo apk add skopeo

macOS

brew install skopeo

Nix / NixOS

$ nix-env -i skopeo

Debian

The skopeo package is available on Bullseye, and Debian Testing and Unstable.

# Debian Bullseye, Testing or Unstable/Sid
sudo apt-get update
sudo apt-get -y install skopeo

Raspberry Pi OS arm64 (beta)

Raspberry Pi OS uses the standard Debian's repositories, so it is fully compatible with Debian's arm64 repository. You can simply follow the steps for Debian to install Skopeo.

Ubuntu

The skopeo package is available in the official repositories for Ubuntu 20.10 and newer.

# Ubuntu 20.10 and newer
sudo apt-get -y update
sudo apt-get -y install skopeo

The Kubic project provides packages for Ubuntu 20.04 (it should also work with direct derivatives like Pop!_OS).

. /etc/os-release
echo "deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/ /" | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
curl -L https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/Release.key | sudo apt-key add -
sudo apt-get update
sudo apt-get -y upgrade
sudo apt-get -y install skopeo

Windows

Skopeo has not yet been packaged for Windows. There is an open feature request and contributions are always welcome.

Container Images

Skopeo container images are available at quay.io/skopeo/stable:latest. For example,

podman run docker://quay.io/skopeo/stable:latest copy --help

Read more.

Building from Source

Otherwise, read on for building and installing it from source:

To build the skopeo binary you need at least Go 1.12.

There are two ways to build skopeo: in a container, or locally without a container. Choose the one which better matches your needs and environment.

Building without a container

Building without a container requires a bit more manual work and setup in your environment, but it is more flexible:

  • It should work in more environments (e.g. for native macOS builds)
  • It does not require root privileges (after dependencies are installed)
  • It is faster, therefore more convenient for developing skopeo.

Install the necessary dependencies:

# Fedora:
sudo dnf install gpgme-devel libassuan-devel btrfs-progs-devel device-mapper-devel
# Ubuntu (`libbtrfs-dev` requires Ubuntu 18.10 and above):
sudo apt install libgpgme-dev libassuan-dev libbtrfs-dev libdevmapper-dev pkg-config
# macOS:
brew install gpgme
# openSUSE:
sudo zypper install libgpgme-devel device-mapper-devel libbtrfs-devel glib2-devel

Make sure to clone this repository in your GOPATH - otherwise compilation fails.

git clone https://github.com/containers/skopeo $GOPATH/src/github.com/containers/skopeo
cd $GOPATH/src/github.com/containers/skopeo && make bin/skopeo

By default the make command (make all) will build bin/skopeo and the documentation locally.

Building of documentation requires go-md2man. On systems that do not have this tool, the document generation can be skipped by passing DISABLE_DOCS=1:

DISABLE_DOCS=1 make

Building documentation

To build the manual you will need go-md2man.

# Debian:
sudo apt-get install go-md2man
# Fedora:
sudo dnf install go-md2man

# MacOS:
brew install go-md2man

Then

make docs

Building in a container

Building in a container is simpler, but more restrictive:

  • It requires the podman command and the ability to run Linux containers.
  • The created executable is a Linux executable, and depends on dynamic libraries which may only be available only in a container of a similar Linux distribution.
$ make binary

Installation

Finally, after the binary and documentation is built:

sudo make install