Software Requirements
---------------------
+.. highlight:: shell-example
+
Before installing, please verify that you have the following programs:
- `Xen Hypervisor <http://www.xen.org/>`_, version 3.0 or above, if
- `KVM Hypervisor <http://www.linux-kvm.org>`_, version 72 or above, if
running on KVM. In order to use advanced features, such as live
migration, virtio, etc, an even newer version is recommended (qemu-kvm
- versions 0.11.X or above have shown good behavior).
+ versions 0.11.X and above have shown good behavior).
- `DRBD <http://www.drbd.org/>`_, kernel module and userspace utils,
- version 8.0.7 or above
+ version 8.0.7 or above; note that Ganeti doesn't yet support version 8.4
+- `RBD <http://ceph.newdream.net/>`_, kernel modules
+ (``rbd.ko``/``libceph.ko``) and userspace utils (``ceph-common``)
- `LVM2 <http://sourceware.org/lvm2/>`_
- `OpenSSH <http://www.openssh.com/portable.html>`_
- `bridge utilities <http://www.linuxfoundation.org/en/Net:Bridge>`_
- `Python <http://www.python.org/>`_, version 2.4 or above, not 3.0
- `Python OpenSSL bindings <http://pyopenssl.sourceforge.net/>`_
- `simplejson Python module <http://code.google.com/p/simplejson/>`_
-- `pyparsing Python module <http://pyparsing.wikispaces.com/>`_
+- `pyparsing Python module <http://pyparsing.wikispaces.com/>`_, version
+ 1.4.6 or above
- `pyinotify Python module <http://trac.dbzteam.org/pyinotify/>`_
- `PycURL Python module <http://pycurl.sourceforge.net/>`_
- `ctypes Python module
<http://starship.python.net/crew/theller/ctypes/>`_, if running on
python 2.4 (optional, used for node daemon memory locking)
-- `socat <http://www.dest-unreach.org/socat/>`_
+- `socat <http://www.dest-unreach.org/socat/>`_, see :ref:`note
+ <socat-note>` below
- `Paramiko <http://www.lag.net/paramiko/>`_, if you want automated SSH
setup; optional otherwise but manual setup of the nodes required
+- `affinity Python module <http://pypi.python.org/pypi/affinity/0.1.0>`_,
+ optional python package for supporting CPU pinning under KVM
+- `ElementTree Python module <http://effbot.org/zone/element-index.htm>`_,
+ if running on python 2.4 (optional, used by the ``ovfconverter`` tool)
+- `qemu-img <http://qemu.org/>`_, if you want to use ``ovfconverter``
+- `fping <http://fping.sourceforge.net/>`_
These programs are supplied as part of most Linux distributions, so
usually they can be installed via the standard package manager. Also
many of them will already be installed on a standard machine. On
Debian/Ubuntu, you can use this command line to install all required
-packages, except for DRBD and Xen::
+packages, except for RBD, DRBD and Xen::
$ apt-get install lvm2 ssh bridge-utils iproute iputils-arping \
ndisc6 python python-pyopenssl openssl \
python-pyparsing python-simplejson \
- python-pyinotify python-pycurl socat
+ python-pyinotify python-pycurl socat fping
+
+Note that this does not install optional packages::
+
+ $ apt-get install python-paramiko python-affinity qemu-img
+
+If some of the python packages are not available in your system,
+you can try installing them using ``easy_install`` command.
+For example::
+
+ $ apt-get install python-setuptools
+ $ cd / && sudo easy_install \
+ affinity
+
+
+On Fedora to install all required packages except RBD, DRBD and Xen::
+
+ $ yum install openssh openssh-clients bridge-utils iproute ndisc6 \
+ pyOpenSSL pyparsing python-simplejson python-inotify \
+ python-lxm socat fping
+
+For optional packages use the command::
+
+ $ yum install python-paramiko python-affinity qemu-img
If you want to build from source, please see doc/devnotes.rst for more
dependencies.
+.. _socat-note:
+.. note::
+ Ganeti's import/export functionality uses ``socat`` with OpenSSL for
+ transferring data between nodes. By default, OpenSSL 0.9.8 and above
+ employ transparent compression of all data using zlib if supported by
+ both sides of a connection. In cases where a lot of data is
+ transferred, this can lead to an increased CPU usage. Additionally,
+ Ganeti already compresses all data using ``gzip`` where it makes sense
+ (for inter-cluster instance moves).
+
+ To remedey this situation, patches implementing a new ``socat`` option
+ for disabling OpenSSL compression have been contributed and will
+ likely be included in the next feature release. Until then, users or
+ distributions need to apply the patches on their own.
+
+ Ganeti will use the option if it's detected by the ``configure``
+ script; auto-detection can be disabled by explicitly passing
+ ``--enable-socat-compress`` (use the option to disable compression) or
+ ``--disable-socat-compress`` (don't use the option).
+
+ The patches and more information can be found on
+ http://www.dest-unreach.org/socat/contrib/socat-opensslcompress.html.
+
+Haskell requirements
+~~~~~~~~~~~~~~~~~~~~
+
+Starting with Ganeti 2.7, the Haskell GHC compiler and a few base
+libraries are required in order to build Ganeti (but not to run and
+deploy Ganeti on production machines). More specifically:
+
+- `GHC <http://www.haskell.org/ghc/>`_ version 6.12 or higher
+- or even better, `The Haskell Platform
+ <http://hackage.haskell.org/platform/>`_ which gives you a simple way
+ to bootstrap Haskell
+- `json <http://hackage.haskell.org/package/json>`_, a JSON library
+- `network <http://hackage.haskell.org/package/network>`_, a basic
+ network library
+- `parallel <http://hackage.haskell.org/package/parallel>`_, a parallel
+ programming library (note: tested with up to version 3.x)
+- `bytestring <http://hackage.haskell.org/package/bytestring>`_ and
+ `utf8-string <http://hackage.haskell.org/package/utf8-string>`_
+ libraries; these usually come with the GHC compiler
+- `deepseq <http://hackage.haskell.org/package/deepseq>`_
+
+Some of these are also available as package in Debian/Ubuntu::
+
+ $ apt-get install ghc6 libghc6-json-dev libghc6-network-dev \
+ libghc6-parallel-dev libghc6-deepseq-dev
+
+Or in newer versions of these distributions (using GHC 7.x)::
+
+ $ apt-get install ghc libghc-json-dev libghc-network-dev \
+ libghc-parallel-dev libghc-deepseq-dev \
+ libghc-utf8-string-dev
+
+In Fedora, they are available via packages as well::
+
+ $ yum install ghc ghc-json-devel ghc-network-devel \
+ ghc-parallel-devel ghc-deepseq-devel
+
+If using a distribution which does not provide them, first install
+the Haskell platform. You can also install ``cabal`` manually::
+
+ $ apt-get install cabal-install
+
+Then install the additional libraries via
+``cabal``::
+
+ $ cabal install json network parallel utf8-string
+
+The compilation of the htools components is automatically enabled when
+the compiler and the requisite libraries are found. You can use the
+``--enable-htools`` configure flag to force the selection (at which
+point ``./configure`` will fail if it doesn't find the prerequisites).
+
+
+Haskell optional features
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Optionally, more functionality can be enabled if your build machine has
+a few more Haskell libraries enabled: RAPI access to remote cluster from
+htools (``--enable-htools-rapi``) and enabling the ``ganeti-confd``
+daemon (``--enable-confd``). The list of extra dependencies for these
+is:
+
+- `curl <http://hackage.haskell.org/package/curl>`_, tested with
+ versions 1.3.4 and above
+- `hslogger <http://software.complete.org/hslogger>`_, version 1.1 and
+ above (note that Debian Squeeze only has version 1.0.9)
+- `Crypto <http://hackage.haskell.org/package/Crypto>`_, tested with
+ version 4.2.4
+- `text <http://hackage.haskell.org/package/text>`_
+- `hinotify <http://hackage.haskell.org/package/hinotify>`_
+- `regex-pcre <http://hackage.haskell.org/package/regex-pcre>`_,
+ bindings for the ``pcre`` library
+
+These libraries are available in Debian Wheezy (but not in Squeeze, with
+the exception of curl), so you can use either apt::
+
+ $ apt-get install libghc-hslogger-dev libghc-crypto-dev libghc-text-dev \
+ libghc-hinotify-dev libghc-regex-pcre-dev libghc-curl-dev
+
+or ``cabal``::
+
+ $ cabal install hslogger Crypto text hinotify regex-pcre curl
+
+to install them.
+
+The most recent Fedora doesn't provide ``curl``, ``crypto``,
+``inotify``. So these need to be installed using ``cabal``, if
+desired. The other packages can be installed via ``yum``::
+
+ $ yum install ghc-hslogger-devel ghc-text-devel \
+ ghc-regex-pcre-devel
+
+.. _cabal-note:
+.. note::
+ If one of the cabal packages fails to install due to unfulfilled
+ dependencies, you can try enabling symlinks in ``~/.cabal/config``.
+
+ Make sure that your ``~/.cabal/bin`` directory (or whatever else
+ is defined as ``bindir``) is in your ``PATH``.
Installation of the software
----------------------------
To install, simply run the following command::
- ./configure --localstatedir=/var --sysconfdir=/etc && \
- make && \
- make install
+ $ ./configure --localstatedir=/var --sysconfdir=/etc && \
+ make && \
+ make install
This will install the software under ``/usr/local``. You then need to
copy ``doc/examples/ganeti.initd`` to ``/etc/init.d/ganeti`` and