-Installation of the software
-============================
+Ganeti quick installation guide
+===============================
+
+Please note that a more detailed installation procedure is described in
+the :doc:`install`. A glossary of terms can be found in the
+:doc:`glossary`.
+
+
+Software Requirements
+---------------------
Before installing, please verify that you have the following programs:
- - lvm 2
- - ssh
- - drbd (kernel module and userspace utils)
- - fping
- - python twisted library (the core is enough)
- - python openssl bindings
-To install, simply do ./configure && make && make install
+- `Xen Hypervisor <http://www.xen.org/>`_, version 3.0 or above, if
+ running on Xen
+- `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).
+- `DRBD <http://www.drbd.org/>`_, kernel module and userspace utils,
+ version 8.0.7 or above
+- `LVM2 <http://sourceware.org/lvm2/>`_
+- `OpenSSH <http://www.openssh.com/portable.html>`_
+- `bridge utilities <http://www.linuxfoundation.org/en/Net:Bridge>`_
+- `iproute2 <http://www.linuxfoundation.org/en/Net:Iproute2>`_
+- `arping <http://www.skbuff.net/iputils/>`_ (part of iputils)
+- `ndisc6 <http://www.remlab.net/ndisc6/>`_ (if using IPv6)
+- `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/>`_
+- `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/>`_, 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
+
+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::
+
+ $ apt-get install lvm2 ssh bridge-utils iproute iputils-arping \
+ ndisc6 python python-pyopenssl openssl \
+ python-pyparsing python-simplejson \
+ python-pyinotify python-pycurl socat
+
+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 explicitely 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.
+
+
+Installation of the software
+----------------------------
+
+To install, simply run the following command::
+
+ ./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
+integrate it into your boot sequence (``chkconfig``, ``update-rc.d``,
+etc.).
-This will install the software under /usr/local. You then need to copy
-ganeti.init to /etc/init.d and integrate it into your boot sequence
-(``chkconfig``, ``update-rc.d``, etc.).
Cluster initialisation
-======================
+----------------------
-Before initialising the cluster, on each node you need to create the following
-directories:
+Before initialising the cluster, on each node you need to create the
+following directories:
- - /etc/ganeti
- - /var/log/ganeti
- - /var/lib/ganeti
- - /srv/ganeti and /srv/ganeti/os
+- ``/etc/ganeti``
+- ``/var/lib/ganeti``
+- ``/var/log/ganeti``
+- ``/srv/ganeti``
+- ``/srv/ganeti/os``
+- ``/srv/ganeti/export``
After this, use ``gnt-cluster init``.
+
+.. vim: set textwidth=72 syntax=rst :
+.. Local Variables:
+.. mode: rst
+.. fill-column: 72
+.. End:
projects / ganeti-local / blobdiff