# Installation Instructions

## System Requirements

### Kernel Version Requirements
To run Buildah on Red Hat Enterprise Linux or CentOS, version 7.4 or higher is required.
On other Linux distributions Buildah requires a kernel version of 4.0 or
higher in order to support the OverlayFS filesystem.  The kernel version can be checked
with the 'uname -a' command.

### runc Requirement

Buildah uses `runc` to run commands when `buildah run` is used, or when `buildah build-using-dockerfile`
encounters a `RUN` instruction, so you'll also need to build and install a compatible version of
[runc](https://github.com/opencontainers/runc) for Buildah to call for those cases.  If Buildah is installed
via a package manager such as yum, dnf or apt-get, runc will be installed as part of that process.

## Package Installation

Buildah is available on several software repositories and can be installed via a package manager such
as yum, dnf or apt-get on a number of Linux distributions.

## Installation from GitHub

Prior to installing Buildah, install the following packages on your Linux distro:
* make
* golang (Requires version 1.8.1 or higher.)
* bats
* btrfs-progs-devel
* bzip2
* device-mapper-devel
* git
* go-md2man
* gpgme-devel
* glib2-devel
* libassuan-devel
* ostree-devel
* runc (Requires version 1.0 RC4 or higher.)
* skopeo-containers

### Fedora

In Fedora, you can use this command:

```
 dnf -y install \
    make \
    golang \
    bats \
    btrfs-progs-devel \
    device-mapper-devel \
    glib2-devel \
    gpgme-devel \
    libassuan-devel \
    ostree-devel \
    git \
    bzip2 \
    go-md2man \
    runc \
    skopeo-containers
```

Then to install Buildah on Fedora follow the steps in this example:


```
  mkdir ~/buildah
  cd ~/buildah
  export GOPATH=`pwd`
  git clone https://github.com/projectatomic/buildah ./src/github.com/projectatomic/buildah
  cd ./src/github.com/projectatomic/buildah
  make
  sudo make install
  buildah --help
```

### RHEL, CentOS

In RHEL and CentOS 7, ensure that you are subscribed to `rhel-7-server-rpms`,
`rhel-7-server-extras-rpms`, and `rhel-7-server-optional-rpms`, then
run this command:

```
 yum -y install \
    make \
    golang \
    bats \
    btrfs-progs-devel \
    device-mapper-devel \
    glib2-devel \
    gpgme-devel \
    libassuan-devel \
    ostree-devel \
    git \
    bzip2 \
    go-md2man \
    runc \
    skopeo-containers
```

The build steps for Buildah on RHEL or CentOS are the same as Fedora, above.

### Ubuntu

In Ubuntu zesty and xenial, you can use these commands:

```
  apt-get -y install software-properties-common
  add-apt-repository -y ppa:alexlarsson/flatpak
  add-apt-repository -y ppa:gophers/archive
  apt-add-repository -y ppa:projectatomic/ppa
  apt-get -y -qq update
  apt-get -y install bats btrfs-tools git libapparmor-dev libdevmapper-dev libglib2.0-dev libgpgme11-dev libostree-dev libseccomp-dev libselinux1-dev skopeo-containers go-md2man
  apt-get -y install golang-1.8
```
Then to install Buildah on Ubuntu follow the steps in this example:

```
  mkdir ~/buildah
  cd ~/buildah
  export GOPATH=`pwd`
  git clone https://github.com/projectatomic/buildah ./src/github.com/projectatomic/buildah
  cd ./src/github.com/projectatomic/buildah
  PATH=/usr/lib/go-1.8/bin:$PATH make runc all TAGS="apparmor seccomp"
  sudo make install install.runc
  buildah --help
```

### Debian

To install the required dependencies, you can use those commands, tested under Debian GNU/Linux amd64 9.3 (stretch):

```
gpg --recv-keys 0x018BA5AD9DF57A4448F0E6CF8BECF1637AD8C79D
gpg --export 0x018BA5AD9DF57A4448F0E6CF8BECF1637AD8C79D >> /usr/share/keyrings/projectatomic-ppa.gpg
echo 'deb [signed-by=/usr/share/keyrings/projectatomic-ppa.gpg] http://ppa.launchpad.net/projectatomic/ppa/ubuntu zesty main' > /etc/apt/sources.list.d/projectatomic-ppa.list
apt update
apt -y install -t stretch-backports libostree-dev golang
apt -y install bats btrfs-tools git libapparmor-dev libdevmapper-dev libglib2.0-dev libgpgme11-dev libseccomp-dev libselinux1-dev skopeo-containers go-md2man
``` 

The build steps on Debian are otherwise the same as Ubuntu, above.