.. include:: global.rst.inc
.. highlight:: bash
.. _installation:

Installation
============

There are different ways to install |project_name|:

- :ref:`distribution-package` - easy and fast if a package is
  available from your distribution.
- :ref:`pyinstaller-binary` - easy and fast, we provide a ready-to-use binary file
  that comes bundled with all dependencies.
- :ref:`source-install`, either:

  - :ref:`pip-installation` - installing a source package with pip needs
    more installation steps and requires all dependencies with
    development headers and a compiler.
  - :ref:`git-installation`  - for developers and power users who want to
    have the latest code or use revision control (each release is
    tagged).

.. _installation-requirements:

Pre-Installation Considerations
-------------------------------

Repository File System
~~~~~~~~~~~~~~~~~~~~~~

- |project_name| stores data only 3 directory levels deep and uses short file and
  directory names.
- |project_name| requires read and write permissions on the repository file system.
- |project_name| stores backup metadata and data into so-called segment files. The 
  target size of these files and also the count of these files per directory is set 
  in the :ref:`config-file`.
- |project_name| uses a generic and very portable mkdir-based `locking`_ mechanism.
  POSIX locks, NFS locks, windows file locks, lockf(), flock() and hardlinks are
  **not** used.
- Hardlinks are only required when performing an in-place upgrade of an Attic
  repository. 
- A journaling file system is strongly recommended. More information can be
  found in :ref:`file-systems`.
- |project_name| requires the following file system operations:

  - create, open, read, write, seek, close, rename, delete
  - link - when upgrading an Attic repo in-place
  - listdir, stat
  - fsync on files and directories to ensure data is written onto storage media
    (some file systems do not support fsync on directories, which Borg accomodates for)

:ref:`data-structures` contains additional information about how |project_name|
manages data.

.. _locking: https://en.wikipedia.org/wiki/File_locking#Lock_files

(G)LIBC requirements
--------------------

Borg uses some filesytem functions from Python's `os` standard library module
with `follow_symlinks=False`. These are implemented since quite a while with
the non-symlink-following (g)libc functions like e.g. `lstat` or `lutimes`
(not: `stat` or `utimes`).

Some stoneage systems (like RHEL/CentOS 5) and also Python interpreter binaries
compiled to be able to run on such systems (like Python installed via Anaconda)
might miss these functions and Borg won't be able to work correctly.
This issue will be detected early and Borg will abort with a fatal error.

For the Borg binaries, there are additional (g)libc requirements, see below.

.. _distribution-package:

Distribution Package
--------------------

Some distributions might offer a ready-to-use ``borgbackup``
package which can be installed with the package manager.

.. important:: Those packages may not be up to date with the latest
               |project_name| releases. Before submitting a bug
               report, check the package version and compare that to
               our latest release then review :doc:`changes` to see if
               the bug has been fixed. Report bugs to the package
               maintainer rather than directly to |project_name| if the
               package is out of date in the distribution.

.. keep this list in alphabetical order

============ ============================================= =======
Distribution Source                                        Command
============ ============================================= =======
Arch Linux   `[community]`_                                ``pacman -S borg``
Debian       `Debian packages`_                            ``apt install borgbackup``
Gentoo       `ebuild`_                                     ``emerge borgbackup``
GNU Guix     `GNU Guix`_                                   ``guix package --install borg``
Fedora/RHEL  `Fedora official repository`_                 ``dnf install borgbackup``
FreeBSD      `FreeBSD ports`_                              ``cd /usr/ports/archivers/py-borgbackup && make install clean``
Mageia       `cauldron`_                                   ``urpmi borgbackup``
NetBSD       `pkgsrc`_                                     ``pkg_add py-borgbackup``
NixOS        `.nix file`_                                  N/A
OpenBSD      `OpenBSD ports`_                              ``pkg_add borgbackup``
OpenIndiana  `OpenIndiana hipster repository`_             ``pkg install borg``
openSUSE     `openSUSE official repository`_               ``zypper in python3-borgbackup``
OS X         `Brew cask`_                                  ``brew cask install borgbackup``
Raspbian     `Raspbian testing`_                           ``apt install borgbackup``
Ubuntu       `Ubuntu packages`_, `Ubuntu PPA`_             ``apt install borgbackup``
============ ============================================= =======

.. _[community]: https://www.archlinux.org/packages/?name=borg
.. _Debian packages: https://packages.debian.org/search?keywords=borgbackup&searchon=names&exact=1&suite=all&section=all
.. _Fedora official repository: https://apps.fedoraproject.org/packages/borgbackup
.. _FreeBSD ports: http://www.freshports.org/archivers/py-borgbackup/
.. _ebuild: https://packages.gentoo.org/packages/app-backup/borgbackup
.. _GNU Guix: https://www.gnu.org/software/guix/package-list.html#borg
.. _pkgsrc: http://pkgsrc.se/sysutils/py-borgbackup
.. _cauldron: http://madb.mageia.org/package/show/application/0/release/cauldron/name/borgbackup
.. _.nix file: https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/backup/borg/default.nix
.. _OpenBSD ports: http://cvsweb.openbsd.org/cgi-bin/cvsweb/ports/sysutils/borgbackup/
.. _OpenIndiana hipster repository: http://pkg.openindiana.org/hipster/en/search.shtml?token=borg&action=Search
.. _openSUSE official repository: http://software.opensuse.org/package/borgbackup
.. _Brew cask: https://caskroom.github.io/
.. _Raspbian testing: http://archive.raspbian.org/raspbian/pool/main/b/borgbackup/
.. _Ubuntu packages: http://packages.ubuntu.com/xenial/borgbackup
.. _Ubuntu PPA: https://launchpad.net/~costamagnagianfranco/+archive/ubuntu/borgbackup

Please ask package maintainers to build a package or, if you can package /
submit it yourself, please help us with that! See :issue:`105` on
github to followup on packaging efforts.

.. _pyinstaller-binary:

Standalone Binary
-----------------

.. note:: Releases are signed with an OpenPGP key, see
          :ref:`security-contact` for more instructions.

|project_name| binaries (generated with `pyinstaller`_) are available
on the releases_ page for the following platforms:

* **Linux**: glibc >= 2.13 (ok for most supported Linux releases). Maybe older
  glibc versions also work, if they are compatible to 2.13.
* **Mac OS X**: 10.10 (does not work with older OS X releases)
* **FreeBSD**: 10.2 (unknown whether it works for older releases)

To install such a binary, just drop it into a directory in your ``PATH``,
make borg readable and executable for its users and then you can run ``borg``::

    sudo cp borg-linux64 /usr/local/bin/borg
    sudo chown root:root /usr/local/bin/borg
    sudo chmod 755 /usr/local/bin/borg

Optionally you can create a symlink to have ``borgfs`` available, which is an
alias for ``borg mount``::

    ln -s /usr/local/bin/borg /usr/local/bin/borgfs

Note that the binary uses /tmp to unpack |project_name| with all dependencies.
It will fail if /tmp has not enough free space or is mounted with the ``noexec`` option.
You can change the temporary directory by setting the ``TEMP`` environment variable before running |project_name|.

If a new version is released, you will have to manually download it and replace
the old version using the same steps as shown above.

.. _pyinstaller: http://www.pyinstaller.org
.. _releases: https://github.com/borgbackup/borg/releases

.. _platforms:

Features & platforms
--------------------

Besides regular file and directory structures, |project_name| can preserve

    * Symlinks (stored as symlink, the symlink is not followed)
    * Special files:

        * Character and block device files (restored via mknod)
        * FIFOs ("named pipes")
        * Special file *contents* can be backed up in ``--read-special`` mode.
          By default the metadata to create them with mknod(2), mkfifo(2) etc. is stored.
    * Hardlinked regular files, devices, FIFOs (considering all items in the same archive)
    * Timestamps in nanosecond precision: mtime, atime, ctime
    * Permissions:

        * IDs of owning user and owning group
        * Names of owning user and owning group (if the IDs can be resolved)
        * Unix Mode/Permissions (u/g/o permissions, suid, sgid, sticky)

On some platforms additional features are supported:

.. Yes/No's are grouped by reason/mechanism/reference.

+------------------+----------+-----------+------------+
| Platform         | ACLs     | xattr     | Flags      |
|                  | [#acls]_ | [#xattr]_ | [#flags]_  |
+==================+==========+===========+============+
| Linux x86        | Yes      | Yes       | Yes [1]_   |
+------------------+          |           |            |
| Linux PowerPC    |          |           |            |
+------------------+          |           |            |
| Linux ARM        |          |           |            |
+------------------+----------+-----------+------------+
| Mac OS X         | Yes      | Yes       | Yes (all)  |
+------------------+----------+-----------+            |
| FreeBSD          | Yes      | Yes       |            |
+------------------+----------+-----------+            |
| OpenBSD          | n/a      | n/a       |            |
+------------------+----------+-----------+            |
| NetBSD           | n/a      | No [2]_   |            |
+------------------+----------+-----------+------------+
| Solaris 11       | No [3]_              | n/a        |
+------------------+                      |            |
| OpenIndiana      |                      |            |
+------------------+----------+-----------+------------+
| Windows (cygwin) | No [4]_  | No        | No         |
+------------------+----------+-----------+------------+

Some Distributions (e.g. Debian) run additional tests after each release, these
are not reflected here.

Other Unix-like operating systems may work as well, but have not been tested at all.

Note that most of the platform-dependent features also depend on the file system.
For example, ntfs-3g on Linux isn't able to convey NTFS ACLs.

.. [1] Only "nodump", "immutable", "compressed" and "append" are supported.
    Feature request :issue:`618` for more flags.
.. [2] Feature request :issue:`1332`
.. [3] Feature request :issue:`1337`
.. [4] Cygwin tries to map NTFS ACLs to permissions with varying degress of success.

.. [#acls] The native access control list mechanism of the OS. This normally limits access to
    non-native ACLs. For example, NTFS ACLs aren't completely accessible on Linux with ntfs-3g.
.. [#xattr] extended attributes; key-value pairs attached to a file, mainly used by the OS.
    This includes resource forks on Mac OS X.
.. [#flags] aka *BSD flags*. The Linux set of flags [1]_ is portable across platforms.
    The BSDs define additional flags.

.. _source-install:

From Source
-----------

Dependencies
~~~~~~~~~~~~

To install |project_name| from a source package (including pip), you have to install the
following dependencies first:

* `Python 3`_ >= 3.4.0, plus development headers. Even though Python 3 is not
  the default Python version on most systems, it is usually available as an
  optional install.
* OpenSSL_ >= 1.0.0, plus development headers.
* libacl_ (that pulls in libattr_ also), both plus development headers.
* liblz4_, plus development headers.
* some Python dependencies, pip will automatically install them for you
* optionally, the llfuse_ Python package is required if you wish to mount an
  archive as a FUSE filesystem. See setup.py about the version requirements.
* optionally libb2_. If it is not found a bundled implementation is used instead.

If you have troubles finding the right package names, have a look at the
distribution specific sections below and also at the Vagrantfile in our repo.

In the following, the steps needed to install the dependencies are listed for a
selection of platforms. If your distribution is not covered by these
instructions, try to use your package manager to install the dependencies.  On
FreeBSD, you may need to get a recent enough OpenSSL version from FreeBSD
ports.

After you have installed the dependencies, you can proceed with steps outlined
under :ref:`pip-installation`.

Debian / Ubuntu
+++++++++++++++

Install the dependencies with development headers::

    sudo apt-get install python3 python3-dev python3-pip python-virtualenv \
    libssl-dev openssl \
    libacl1-dev libacl1 \
    liblz4-dev liblz4-1 \
    build-essential
    sudo apt-get install libfuse-dev fuse pkg-config    # optional, for FUSE support

In case you get complaints about permission denied on ``/etc/fuse.conf``: on
Ubuntu this means your user is not in the ``fuse`` group. Add yourself to that
group, log out and log in again.

Fedora / Korora
+++++++++++++++

Install the dependencies with development headers::

    sudo dnf install python3 python3-devel python3-pip python3-virtualenv
    sudo dnf install openssl-devel openssl
    sudo dnf install libacl-devel libacl
    sudo dnf install lz4-devel
    sudo dnf install gcc gcc-c++
    sudo dnf install redhat-rpm-config                 # not needed in Korora
    sudo dnf install fuse-devel fuse pkgconfig         # optional, for FUSE support


Mac OS X
++++++++

Assuming you have installed homebrew_, the following steps will install all the
dependencies::

    brew install python3 lz4 openssl
    brew install pkg-config                            # optional, for FUSE support
    pip3 install virtualenv

For FUSE support to mount the backup archives, you need at least version 3.0 of
FUSE for OS X, which is available as a pre-release_.

.. _pre-release: https://github.com/osxfuse/osxfuse/releases


FreeBSD
++++++++
Listed below are packages you will need to install |project_name|, its dependencies,
and commands to make fuse work for using the mount command.

::

     pkg install -y python3 openssl liblz4 fusefs-libs pkgconf
     pkg install -y git
     python3.4 -m ensurepip # to install pip for Python3
     To use the mount command:
     echo 'fuse_load="YES"' >> /boot/loader.conf
     echo 'vfs.usermount=1' >> /etc/sysctl.conf
     kldload fuse
     sysctl vfs.usermount=1


Windows 10's Linux Subsystem
++++++++++++++++++++++++++++

.. note::
    Running under Windows 10's Linux Subsystem is experimental and has not been tested much yet.

Just follow the Ubuntu Linux installation steps. You can omit the FUSE stuff, it won't work anyway.


Cygwin
++++++

.. note::
    Running under Cygwin is experimental and has only been tested with Cygwin
    (x86-64) v2.5.2. Remote repositories are known broken, local repositories should work.

Use the Cygwin installer to install the dependencies::

    python3 python3-devel python3-setuptools
    binutils gcc-g++
    libopenssl openssl-devel
    liblz4_1 liblz4-devel
    git make openssh

You can then install ``pip`` and ``virtualenv``::

    easy_install-3.4 pip
    pip install virtualenv


.. _pip-installation:

Using pip
~~~~~~~~~

Virtualenv_ can be used to build and install |project_name| without affecting
the system Python or requiring root access.  Using a virtual environment is
optional, but recommended except for the most simple use cases.

.. note::
    If you install into a virtual environment, you need to **activate** it
    first (``source borg-env/bin/activate``), before running ``borg``.
    Alternatively, symlink ``borg-env/bin/borg`` into some directory that is in
    your ``PATH`` so you can just run ``borg``.

This will use ``pip`` to install the latest release from PyPi::

    virtualenv --python=python3 borg-env
    source borg-env/bin/activate

    # install Borg + Python dependencies into virtualenv
    pip install borgbackup
    # or alternatively (if you want FUSE support):
    pip install borgbackup[fuse]

To upgrade |project_name| to a new version later, run the following after
activating your virtual environment::

    pip install -U borgbackup  # or ... borgbackup[fuse]

.. _git-installation:

Using git
~~~~~~~~~

This uses latest, unreleased development code from git.
While we try not to break master, there are no guarantees on anything. ::

    # get borg from github
    git clone https://github.com/borgbackup/borg.git

    virtualenv --python=python3 borg-env
    source borg-env/bin/activate   # always before using!

    # install borg + dependencies into virtualenv
    pip install sphinx  # optional, to build the docs
    cd borg
    pip install -r requirements.d/development.txt
    pip install -r requirements.d/fuse.txt  # optional, for FUSE support
    pip install -e .  # in-place editable mode

    # optional: run all the tests, on all supported Python versions
    # requires fakeroot, available through your package manager
    fakeroot -u tox

.. note:: As a developer or power user, you always want to use a virtual environment.
