root / INSTALL @ 29b8eaee
History | View | Annotate | Download (4.4 kB)
1 |
Ganeti quick installation guide |
---|---|
2 |
=============================== |
3 |
|
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 |
6 |
:doc:`glossary`. |
7 |
|
8 |
|
9 |
Software Requirements |
10 |
--------------------- |
11 |
|
12 |
Before installing, please verify that you have the following programs: |
13 |
|
14 |
- `Xen Hypervisor <http://www.xen.org/>`_, version 3.0 or above, if |
15 |
running on Xen |
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/>`_ |
32 |
- `pyinotify Python module <http://trac.dbzteam.org/pyinotify/>`_ |
33 |
- `PycURL Python module <http://pycurl.sourceforge.net/>`_ |
34 |
- `ctypes Python module |
35 |
<http://starship.python.net/crew/theller/ctypes/>`_, if running on |
36 |
python 2.4 (optional, used for node daemon memory locking) |
37 |
- `socat <http://www.dest-unreach.org/socat/>`_, see :ref:`note |
38 |
<socat-note>` below |
39 |
- `Paramiko <http://www.lag.net/paramiko/>`_, if you want automated SSH |
40 |
setup; optional otherwise but manual setup of the nodes required |
41 |
|
42 |
These programs are supplied as part of most Linux distributions, so |
43 |
usually they can be installed via the standard package manager. Also |
44 |
many of them will already be installed on a standard machine. On |
45 |
Debian/Ubuntu, you can use this command line to install all required |
46 |
packages, except for DRBD and Xen:: |
47 |
|
48 |
$ apt-get install lvm2 ssh bridge-utils iproute iputils-arping \ |
49 |
ndisc6 python python-pyopenssl openssl \ |
50 |
python-pyparsing python-simplejson \ |
51 |
python-pyinotify python-pycurl socat |
52 |
|
53 |
If you want to build from source, please see doc/devnotes.rst for more |
54 |
dependencies. |
55 |
|
56 |
.. _socat-note: |
57 |
.. note:: |
58 |
Ganeti's import/export functionality uses ``socat`` with OpenSSL for |
59 |
transferring data between nodes. By default, OpenSSL 0.9.8 and above |
60 |
employ transparent compression of all data using zlib if supported by |
61 |
both sides of a connection. In cases where a lot of data is |
62 |
transferred, this can lead to an increased CPU usage. Additionally, |
63 |
Ganeti already compresses all data using ``gzip`` where it makes sense |
64 |
(for inter-cluster instance moves). |
65 |
|
66 |
To remedey this situation, patches implementing a new ``socat`` option |
67 |
for disabling OpenSSL compression have been contributed and will |
68 |
likely be included in the next feature release. Until then, users or |
69 |
distributions need to apply the patches on their own. |
70 |
|
71 |
Ganeti will use the option if it's detected by the ``configure`` |
72 |
script; auto-detection can be disabled by explicitely passing |
73 |
``--enable-socat-compress`` (use the option to disable compression) or |
74 |
``--disable-socat-compress`` (don't use the option). |
75 |
|
76 |
The patches and more information can be found on |
77 |
http://www.dest-unreach.org/socat/contrib/socat-opensslcompress.html. |
78 |
|
79 |
|
80 |
Installation of the software |
81 |
---------------------------- |
82 |
|
83 |
To install, simply run the following command:: |
84 |
|
85 |
./configure --localstatedir=/var --sysconfdir=/etc && \ |
86 |
make && \ |
87 |
make install |
88 |
|
89 |
This will install the software under ``/usr/local``. You then need to |
90 |
copy ``doc/examples/ganeti.initd`` to ``/etc/init.d/ganeti`` and |
91 |
integrate it into your boot sequence (``chkconfig``, ``update-rc.d``, |
92 |
etc.). |
93 |
|
94 |
|
95 |
Cluster initialisation |
96 |
---------------------- |
97 |
|
98 |
Before initialising the cluster, on each node you need to create the |
99 |
following directories: |
100 |
|
101 |
- ``/etc/ganeti`` |
102 |
- ``/var/lib/ganeti`` |
103 |
- ``/var/log/ganeti`` |
104 |
- ``/srv/ganeti`` |
105 |
- ``/srv/ganeti/os`` |
106 |
- ``/srv/ganeti/export`` |
107 |
|
108 |
After this, use ``gnt-cluster init``. |
109 |
|
110 |
.. vim: set textwidth=72 syntax=rst : |
111 |
.. Local Variables: |
112 |
.. mode: rst |
113 |
.. fill-column: 72 |
114 |
.. End: |