.. -*- coding: utf-8-with-signature-unix; fill-column: 77 -*- ********************* Installing Tahoe-LAFS ********************* Welcome to `the Tahoe-LAFS project`_, a secure, decentralized, fault-tolerant storage system. See `about.rst`_ for an overview of the architecture and security properties of the system. This procedure should work on Windows, Mac, OpenSolaris, and too many flavors of Linux and of BSD to list. .. _the Tahoe-LAFS project: https://tahoe-lafs.org .. _about.rst: about.rst First: In Case Of Trouble ========================= In some cases these instructions may fail due to peculiarities of your platform. If the following instructions don't Just Work without any further effort on your part, then please write to `the tahoe-dev mailing list`_ where friendly hackers will help you out. .. _the tahoe-dev mailing list: https://tahoe-lafs.org/cgi-bin/mailman/listinfo/tahoe-dev Pre-Packaged Versions ===================== You may not need to build Tahoe at all. If you are on Windows, please see `windows.rst`_ for platform-specific instructions. If you are on a Mac, you can either follow these instructions, or use the pre-packaged bundle described in `OS-X.rst`_. The Tahoe project hosts pre-compiled "wheels" for all dependencies, so use the ``--find-links=`` option described below to avoid needing a compiler. Many Linux distributions include Tahoe-LAFS packages. Debian and Ubuntu users can ``apt-get install tahoe-lafs``. See `OSPackages`_ for other platforms. .. _OSPackages: https://tahoe-lafs.org/trac/tahoe-lafs/wiki/OSPackages .. _windows.rst: windows.rst .. _OS-X.rst: OS-X.rst Preliminaries ============= If you don't use a pre-packaged copy of Tahoe, you can build it yourself. You'll need Python2.7, pip, and virtualenv. On unix-like platforms, you will need a C compiler, the Python development headers, and some libraries (libffi-dev and libssl-dev). On a modern Debian/Ubuntu-derived distribution, this command will get you everything you need:: apt-get install build-essential python-dev libffi-dev libssl-dev python-virtualenv On OS-X, install pip and virtualenv as described below. If you want to compile the dependencies yourself (instead of using ``--find-links`` to take advantage of the pre-compiled ones we host), you'll also need to install Xcode and its command-line tools. Python 2.7 ---------- Check if you already have an adequate version of Python installed by running ``python -V``. The latest version of Python v2.7 is recommended, which is 2.7.11 as of this writing. Python v2.6.x and v3 do not work. On Windows, we recommend the use of native Python v2.7, not Cygwin Python. If you don't have one of these versions of Python installed, `download`_ and install the latest version of Python v2.7. Make sure that the path to the installation directory has no spaces in it (e.g. on Windows, do not install Python in the "Program Files" directory):: % python --version Python 2.7.11 .. _download: https://www.python.org/downloads/ pip --- Many Python installations already include ``pip``, but in case yours does not, get it with the `pip install instructions`_:: % pip --version pip 8.1.1 from ... (python 2.7) .. _pip install instructions: https://pip.pypa.io/en/stable/installing/ virtualenv ---------- If you do not have an OS-provided copy of ``virtualenv``, install it with the instructions from the `virtualenv documentation`_:: % virtualenv --version 15.0.1 .. _virtualenv documentation: https://virtualenv.pypa.io/en/latest/installation.html C compiler and libraries ------------------------ Except on OS-X, where the Tahoe project hosts pre-compiled wheels for all dependencies, you will need several C libraries installed before you can build. You will also need the Python development headers, and a C compiler (your python installation should know how to find these). On Debian/Ubuntu-derived systems, the necessary packages are ``python-dev``, ``libffi-dev``, and ``libssl-dev``, and can be installed with ``apt-get``. On RPM-based system (like Fedora) these may be named ``python-devel``, etc, instead, and cam be installed with ``yum`` or ``rpm``. Install the Latest Tahoe-LAFS Release ===================================== We recommend creating a fresh virtualenv for your Tahoe-LAFS install, to isolate it from any python packages that are already installed (and to isolate the rest of your system from Tahoe's dependencies). This example uses a virtualenv named ``venv``, but you can call it anything you like. Many people prefer to keep all their virtualenvs in one place, like ``~/.local/venvs/`` or ``~/venvs/``. It's usually a good idea to upgrade the virtualenv's ``pip`` and ``setuptools`` to their latest versions, with ``venv/bin/pip install -U pip setuptools``. Many operating systems have an older version of ``virtualenv``, which then includes older versions of pip and setuptools. Upgrading is easy, and only affects the virtualenv: not the rest of your computer. Then use the virtualenv's ``pip`` to install the latest Tahoe-LAFS release from PyPI with ``venv/bin/pip install tahoe-lafs``. After installation, run ``venv/bin/tahoe --version`` to confirm the install was successful:: % virtualenv venv New python executable in ~/venv/bin/python2.7 Installing setuptools, pip, wheel...done. % venv/bin/pip install -U pip setuptools Downloading/unpacking pip from https://pypi.python.org/... ... Successfully installed pip setuptools % venv/bin/pip install tahoe-lafs Collecting tahoe-lafs ... Installing collected packages: ... Successfully installed ... % venv/bin/tahoe --version tahoe-lafs: 1.11.0 foolscap: ... % On OS-X, instead of ``pip install tahoe-lafs``, use this command to take advantage of the hosted pre-compiled wheels:: venv/bin/pip install --find-links=https://tahoe-lafs.org/deps tahoe-lafs Install From a Source Tarball ----------------------------- You can also download the source tarball first, unpack it, then install from the unpacked source tree. Download the latest stable release, `Tahoe-LAFS v1.11.0`_. .. _Tahoe-LAFS v1.11.0: https://tahoe-lafs.org/downloads/tahoe-lafs-1.11.0.tar.bz2 Then unpack and install (again into a virtualenv):: % wget https://tahoe-lafs.org/downloads/tahoe-lafs-1.11.0.tar.bz2 ... % tar xf tahoe-lafs-1.11.0.tar.bz2 ... % cd tahoe-lafs-1.11.0 % virtualenv venv New python executable in ~/tahoe-lafs-1.11.0/venv/bin/python2.7 Installing setuptools, pip, wheel...done. % venv/bin/pip install . Processing ~/tahoe-lafs-1.11.0 ... Installing collected packages: ... Successfully installed ... % venv/bin/tahoe --version tahoe-lafs: 1.11.0 ... Hacking On Tahoe-LAFS --------------------- To modify the Tahoe source code, you should get a git checkout, and install with the ``--editable`` flag. You should also use the ``[test]`` extra to get the additional libraries needed to run the unit tests:: % git clone https://github.com/tahoe-lafs/tahoe-lafs.git % cd tahoe-lafs % virtualenv venv % venv/bin/pip install --editable .[test] Obtaining file::~/tahoe-lafs ... Successfully installed ... % venv/bin/tahoe --version tahoe-lafs: 1.11.0.post34.dev0 ... This way, you won't have to re-run the ``pip install`` step each time you modify the source code. Running the ``tahoe`` executable ================================ The rest of the Tahoe-LAFS documentation assumes that you can run the ``tahoe`` executable that you just created. You have four basic options: * Use the full path each time (e.g. ``~/venv/bin/tahoe``). * "`Activate`_" the virtualenv with ``. venv/bin/activate``, to get a subshell with a ``$PATH`` that includes the ``venv/bin/`` directory, then you can just run ``tahoe``. * Change your ``$PATH`` to include the ``venv/bin/`` directory, so you can just run ``tahoe``. * Symlink from ``~/bin/tahoe`` to the ``tahoe`` executable. Since ``~/bin`` is typically in your ``$PATH`` (at least if it exists when you log in), this will let you just run ``tahoe``. You might also find the `pipsi`_ tool convenient: ``pipsi install tahoe-lafs`` will create a new virtualenv, install tahoe into it, then symlink just the executable (into ``~/.local/bin/tahoe``). Then either add ``~/.local/bin/`` to your ``$PATH``, or make one last symlink into ``~/bin/tahoe``. .. _Activate: https://virtualenv.pypa.io/en/latest/userguide.html#activate-script .. _pipsi: https://pypi.python.org/pypi/pipsi/0.9 Running the Self-Tests ====================== To run the self-tests from a source tree, you'll need ``tox`` installed. On a Debian/Ubuntu system, use ``apt-get install tox``. You can also install it into your tahoe-specific virtualenv with ``pip install tox``. Then just run ``tox``. This will create a new fresh virtualenv, install Tahoe (from the source tree, including any changes you have made) and all its dependencies (including testing-only dependencies) into the virtualenv, then run the unit tests. This ensures that the tests are repeatable and match the results of other users, unaffected by any other Python packages installed on your machine. On a modern computer this will take 5-10 minutes, and should result in a "all tests passed" mesage:: % tox GLOB sdist-make: ~/tahoe-lafs/setup.py py27 recreate: ~/tahoe-lafs/.tox/py27 py27 inst: ~/tahoe-lafs/.tox/dist/tahoe-lafs-1.11.0a2.post8.dev0.zip py27 runtests: commands[0] | tahoe --version py27 runtests: commands[1] | trial --rterrors allmydata allmydata.test.test_auth AccountFileCheckerKeyTests test_authenticated ... [OK] test_missing_signature ... [OK] ... Ran 1186 tests in 423.179s PASSED (skips=7, expectedFailures=3, successes=1176) __________________________ summary ___________________________________ py27: commands succeeded congratulations :) Common Problems =============== If you see an error like ``fatal error: Python.h: No such file or directory`` while compiling the dependencies, you need the Python development headers. If you are on a Debian or Ubuntu system, you can install them with ``sudo apt-get install python-dev``. On RedHat/Fedora, install ``python-devel``. Similar errors about ``openssl/crypto.h`` indicate that you are missing the OpenSSL development headers (``libssl-dev``). Likewise ``ffi.h`` means you need ``libffi-dev``. Using Tahoe-LAFS ================ Now you are ready to deploy a decentralized filesystem. You will use the ``tahoe`` executable to create, configure, and launch your Tahoe-LAFS nodes. See `running.rst`_ for instructions on how to do that. .. _running.rst: running.rst