1 Ganeti quick installation guide
2 ===============================
4 Please note that a more detailed installation procedure is described in
5 the :doc:`install`. A glossary of terms can be found in the
12 Before installing, please verify that you have the following programs:
14 - `Xen Hypervisor <http://www.xen.org/>`_, version 3.0 or above, if
16 - `KVM Hypervisor <http://www.linux-kvm.org>`_, version 72 or above, if
17 running on KVM. In order to use advanced features, such as live
18 migration, virtio, etc, an even newer version is recommended (qemu-kvm
19 versions 0.11.X or above have shown good behavior).
20 - `DRBD <http://www.drbd.org/>`_, kernel module and userspace utils,
21 version 8.0.7 or above
22 - `LVM2 <http://sourceware.org/lvm2/>`_
23 - `OpenSSH <http://www.openssh.com/portable.html>`_
24 - `bridge utilities <http://www.linuxfoundation.org/en/Net:Bridge>`_
25 - `iproute2 <http://www.linuxfoundation.org/en/Net:Iproute2>`_
26 - `arping <http://www.skbuff.net/iputils/>`_ (part of iputils)
27 - `ndisc6 <http://www.remlab.net/ndisc6/>`_ (if using IPv6)
28 - `Python <http://www.python.org/>`_, version 2.4 or above, not 3.0
29 - `Python OpenSSL bindings <http://pyopenssl.sourceforge.net/>`_
30 - `simplejson Python module <http://code.google.com/p/simplejson/>`_
31 - `pyparsing Python module <http://pyparsing.wikispaces.com/>`_, version
33 - `pyinotify Python module <http://trac.dbzteam.org/pyinotify/>`_
34 - `PycURL Python module <http://pycurl.sourceforge.net/>`_
35 - `ctypes Python module
36 <http://starship.python.net/crew/theller/ctypes/>`_, if running on
37 python 2.4 (optional, used for node daemon memory locking)
38 - `socat <http://www.dest-unreach.org/socat/>`_, see :ref:`note
40 - `Paramiko <http://www.lag.net/paramiko/>`_, if you want automated SSH
41 setup; optional otherwise but manual setup of the nodes required
42 - `affinity Python module <http://pypi.python.org/pypi/affinity/0.1.0>`_,
43 optional python package for supporting CPU pinning under KVM
44 - `ElementTree Python module <http://effbot.org/zone/element-index.htm>`_,
45 if running python 2.4 (optional, used by ovfconverter tool)
46 - `qemu-img <http://qemu.org/>`_, if you want to use ovfconverter
48 These programs are supplied as part of most Linux distributions, so
49 usually they can be installed via the standard package manager. Also
50 many of them will already be installed on a standard machine. On
51 Debian/Ubuntu, you can use this command line to install all required
52 packages, except for DRBD and Xen::
54 $ apt-get install lvm2 ssh bridge-utils iproute iputils-arping \
55 ndisc6 python python-pyopenssl openssl \
56 python-pyparsing python-simplejson \
57 python-pyinotify python-pycurl socat \
58 python-elementtree qemu
60 If you want to also enable the `htools` components, which is recommended
61 on bigger deployments (they give you automatic instance placement,
62 cluster balancing, etc.), then you need to have a Haskell compiler
63 installed. More specifically:
65 - `GHC <http://www.haskell.org/ghc/>`_ version 6.10 or higher
66 - or even better, `The Haskell Platform
67 <http://hackage.haskell.org/platform/>`_ which gives you a simple way
69 - `json <http://hackage.haskell.org/package/json>`_, a JSON library
70 - `network <http://hackage.haskell.org/package/network>`_, a basic
72 - `parallel <http://hackage.haskell.org/package/parallel>`_, a parallel
73 programming library (note: tested with up to version 3.x)
74 - `curl <http://hackage.haskell.org/package/curl>`_, bindings for the
75 curl library, only needed if you want these tools to connect to remote
76 clusters (as opposed to the local one)
78 All of these are also available as package in Debian/Ubuntu::
80 $ apt-get install ghc6 libghc6-json-dev libghc6-network-dev \
81 libghc6-parallel-dev libghc6-curl-dev
83 Note that more recent version have switched to GHC 7.x and the packages
86 $ apt-get install ghc libghc-json-dev libghc-network-dev \
87 libghc-parallel-dev libghc-curl-dev
89 The compilation of the htools components is automatically enabled when
90 the compiler and the requisite libraries are found. You can use the
91 ``--enable-htools`` configure flag to force the selection (at which
92 point ``./configure`` will fail if it doesn't find the prerequisites).
94 If you want to build from source, please see doc/devnotes.rst for more
99 Ganeti's import/export functionality uses ``socat`` with OpenSSL for
100 transferring data between nodes. By default, OpenSSL 0.9.8 and above
101 employ transparent compression of all data using zlib if supported by
102 both sides of a connection. In cases where a lot of data is
103 transferred, this can lead to an increased CPU usage. Additionally,
104 Ganeti already compresses all data using ``gzip`` where it makes sense
105 (for inter-cluster instance moves).
107 To remedey this situation, patches implementing a new ``socat`` option
108 for disabling OpenSSL compression have been contributed and will
109 likely be included in the next feature release. Until then, users or
110 distributions need to apply the patches on their own.
112 Ganeti will use the option if it's detected by the ``configure``
113 script; auto-detection can be disabled by explicitely passing
114 ``--enable-socat-compress`` (use the option to disable compression) or
115 ``--disable-socat-compress`` (don't use the option).
117 The patches and more information can be found on
118 http://www.dest-unreach.org/socat/contrib/socat-opensslcompress.html.
121 Installation of the software
122 ----------------------------
124 To install, simply run the following command::
126 ./configure --localstatedir=/var --sysconfdir=/etc && \
130 This will install the software under ``/usr/local``. You then need to
131 copy ``doc/examples/ganeti.initd`` to ``/etc/init.d/ganeti`` and
132 integrate it into your boot sequence (``chkconfig``, ``update-rc.d``,
136 Cluster initialisation
137 ----------------------
139 Before initialising the cluster, on each node you need to create the
140 following directories:
143 - ``/var/lib/ganeti``
144 - ``/var/log/ganeti``
147 - ``/srv/ganeti/export``
149 After this, use ``gnt-cluster init``.
151 .. vim: set textwidth=72 syntax=rst :