Revision 727ee1ec INSTALL
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Software Requirements |
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--------------------- |
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.. highlight:: shell-example |
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Before installing, please verify that you have the following programs: |
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- `Xen Hypervisor <http://www.xen.org/>`_, version 3.0 or above, if |
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- `KVM Hypervisor <http://www.linux-kvm.org>`_, version 72 or above, if |
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running on KVM. In order to use advanced features, such as live |
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migration, virtio, etc, an even newer version is recommended (qemu-kvm |
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versions 0.11.X or above have shown good behavior).
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versions 0.11.X and above have shown good behavior).
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- `DRBD <http://www.drbd.org/>`_, kernel module and userspace utils, |
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version 8.0.7 or above |
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- `RBD <http://ceph.newdream.net/>`_, kernel modules (rbd.ko/libceph.ko)
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and userspace utils (ceph-common)
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version 8.0.7 or above; note that Ganeti doesn't yet support version 8.4
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- `RBD <http://ceph.newdream.net/>`_, kernel modules |
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(``rbd.ko``/``libceph.ko``) and userspace utils (``ceph-common``)
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- `LVM2 <http://sourceware.org/lvm2/>`_ |
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- `OpenSSH <http://www.openssh.com/portable.html>`_ |
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- `bridge utilities <http://www.linuxfoundation.org/en/Net:Bridge>`_ |
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- `affinity Python module <http://pypi.python.org/pypi/affinity/0.1.0>`_, |
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optional python package for supporting CPU pinning under KVM |
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- `ElementTree Python module <http://effbot.org/zone/element-index.htm>`_, |
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if running python 2.4 (optional, used by ovfconverter tool)
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- `qemu-img <http://qemu.org/>`_, if you want to use ovfconverter
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if running python 2.4 (optional, used by the ``ovfconverter`` tool)
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- `qemu-img <http://qemu.org/>`_, if you want to use ``ovfconverter``
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- `fping <http://fping.sourceforge.net/>`_ |
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These programs are supplied as part of most Linux distributions, so |
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python-pyinotify python-pycurl socat \ |
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python-elementtree qemu |
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If you want to also enable the `htools` components, which is recommended |
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on bigger deployments (they give you automatic instance placement, |
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cluster balancing, etc.), then you need to have a Haskell compiler |
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installed. More specifically: |
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If you want to build from source, please see doc/devnotes.rst for more |
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dependencies. |
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.. _socat-note: |
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.. note:: |
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Ganeti's import/export functionality uses ``socat`` with OpenSSL for |
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transferring data between nodes. By default, OpenSSL 0.9.8 and above |
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employ transparent compression of all data using zlib if supported by |
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both sides of a connection. In cases where a lot of data is |
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transferred, this can lead to an increased CPU usage. Additionally, |
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Ganeti already compresses all data using ``gzip`` where it makes sense |
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(for inter-cluster instance moves). |
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To remedey this situation, patches implementing a new ``socat`` option |
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for disabling OpenSSL compression have been contributed and will |
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likely be included in the next feature release. Until then, users or |
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distributions need to apply the patches on their own. |
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Ganeti will use the option if it's detected by the ``configure`` |
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script; auto-detection can be disabled by explicitely passing |
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``--enable-socat-compress`` (use the option to disable compression) or |
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``--disable-socat-compress`` (don't use the option). |
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The patches and more information can be found on |
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http://www.dest-unreach.org/socat/contrib/socat-opensslcompress.html. |
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Haskell requirements |
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~~~~~~~~~~~~~~~~~~~~ |
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If you want to enable the `htools` component, which is recommended on |
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bigger deployments (this give you automatic instance placement, cluster |
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balancing, etc.), then you need to have a Haskell compiler installed on |
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your build machine (but this is not required on the machines which are |
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just going to run Ganeti). More specifically: |
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- `GHC <http://www.haskell.org/ghc/>`_ version 6.12 or higher |
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- or even better, `The Haskell Platform |
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$ apt-get install ghc libghc-json-dev libghc-network-dev \ |
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libghc-parallel-dev libghc-curl-dev |
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If using a distribution which does not provide them, the first install |
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the Haskell platform and then install the additional libraries via |
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``cabal``:: |
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$ cabal install json network parallel curl |
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The compilation of the htools components is automatically enabled when |
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the compiler and the requisite libraries are found. You can use the |
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``--enable-htools`` configure flag to force the selection (at which |
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point ``./configure`` will fail if it doesn't find the prerequisites). |
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If you want to build from source, please see doc/devnotes.rst for more |
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dependencies. |
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In Ganeti version 2.6, one of the daemons (``ganeti-confd``) is shipped |
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in two versions: the Python default version (which has no extra |
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dependencies), and an experimental Haskell version. This latter version |
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can be enabled via the ``./configure`` flag ``--enable-confd=haskell`` |
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and a few has extra dependencies: |
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.. _socat-note: |
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.. note:: |
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Ganeti's import/export functionality uses ``socat`` with OpenSSL for |
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transferring data between nodes. By default, OpenSSL 0.9.8 and above |
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employ transparent compression of all data using zlib if supported by |
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both sides of a connection. In cases where a lot of data is |
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transferred, this can lead to an increased CPU usage. Additionally, |
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Ganeti already compresses all data using ``gzip`` where it makes sense |
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(for inter-cluster instance moves). |
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- `hslogger <http://software.complete.org/hslogger>`_, version 1.1 and |
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above (note that Debian Squeeze only has version 1.0.9) |
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- `Crypto <http://hackage.haskell.org/package/Crypto>`_, tested with |
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version 4.2.4 |
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- `text <http://hackage.haskell.org/package/text>`_ |
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- ``bytestring``, which usually comes with the compiler |
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To remedey this situation, patches implementing a new ``socat`` option |
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for disabling OpenSSL compression have been contributed and will |
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likely be included in the next feature release. Until then, users or |
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distributions need to apply the patches on their own. |
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These libraries are available in Debian Wheezy (but not in Squeeze), so |
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you can use either apt:: |
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Ganeti will use the option if it's detected by the ``configure`` |
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script; auto-detection can be disabled by explicitely passing |
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``--enable-socat-compress`` (use the option to disable compression) or |
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``--disable-socat-compress`` (don't use the option). |
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$ apt-get install libghc-hslogger-dev libghc-crypto-dev libghc-text-dev |
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The patches and more information can be found on |
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http://www.dest-unreach.org/socat/contrib/socat-opensslcompress.html. |
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or ``cabal``:: |
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$ cabal install hslogger Crypto text |
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to install them. |
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Installation of the software |
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---------------------------- |
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To install, simply run the following command:: |
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./configure --localstatedir=/var --sysconfdir=/etc && \ |
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make && \ |
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make install |
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$ ./configure --localstatedir=/var --sysconfdir=/etc && \
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make && \
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make install
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This will install the software under ``/usr/local``. You then need to |
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copy ``doc/examples/ganeti.initd`` to ``/etc/init.d/ganeti`` and |
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