Synnefo » Ganeti Instance Image

Version 0.7

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Fix Ganeti 1.2 compatibility (0.6 was broken) and force the scripts to be

executed under /bin/bash (rather than /bin/sh). This fixes compatibility with

distributions where /bin/sh is not bash.

Support 'msdos' partition style, in which the instance disk gets a partition

table, and one big partition, rather than creating the filesytem directly on

the block device. This requires kpartx to be installed, and is the default when

installing under Ganeti 2.0.

Added the possibility to customize the installation without having to patch the

os directly, by executing the scripts in CUSTOMIZE_DIR and giving them a chance

to change the instance filesystem. As an example a script that sets the first

nic to request a dhcp address is provided.

Version 0.6

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Support for Ganeti 2.0 (os api 10)

The instance's fstab is now generated with volumes' UUIDs rather than paths.

This makes it more resilient to changes and use under different

hypervisors/drivers.

Init is configured to listen on /dev/console rather than /dev/tty1

Version 0.5

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Most of the settings of the script have been moved to a configuration

file.  Depending on the ./configure options, the location of this file

might be /etc/default/ganeti-instance-debootstrap or

/usr/local/etc/default/ganeti-instance-debootstrap.

The cache generation and cleaning variables can be modified as follows:

- to enable generating the cache, modify the config file and set

  GENERATE_CACHE to "yes"

- to disable cleaning the cache, set CLEAN_CACHE to ""; or

  alternatively, you can customize with this variable the number of days

  after which to clear the cache

Note that the cache file is no longer stored in the same directory as

the OS definition files, but (again depending on ./configure options)

usually under /var/cache/ganeti-instance-debootstrap.

There are many other customuizable settings added in this version, for

example the actual OS to be installed (no longer always installing

Debian Etch), whether to use a proxy or not, etc. See the README and the

'defaults' files.

Version 0.4

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This version fixes the problem of interface renaming at instance import

time, by removing the saved udev hotplug rules (if any).

Version 0.3

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The OS will cache the image of the first instance it installs using the

name "cache-$arch.tar" (where $arch is what dpkg --print-architecture

returns) on a node-by-node basis. This cache will be then used on the

future installs, speeding them greatly (even with a fast mirror). Feel

free to remove the cache at any time, or to copy it to all nodes. The

cache will be kept for two weeks, after which the first install will

recreate the cache (in order not to use old packages). If you don't care

about package age, remove the user write permission (chmod u-w) from the

cache and ganeti will continue to use the same file without refreshing

it.

If you don't have enough space and don't want cache creation, just touch

the file 'no_cache' - this will prevent the creation, but the script

will continue to use a cache if it exists (but it will remove an

existing one after two weeks).

Also note that if the image file is there, the script does not need

network access at all.