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List:       cobbler
Subject:    [cobbler] Imports with --available-as
From:       James Cammarata <jimi () sngx ! net>
Date:       2012-04-21 13:00:44
Message-ID: CAFgbs7e+_DC3AcJK5Rj-T1sCRPmj6waOgQ3HyxTMhv2c6nZ4QQ () mail ! gmail ! com
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For those who may not be aware, we moved imports to a modular setup in
2.2.0 to remove the spaghetti code that imports were turning into.
This allowed us to start supporting distros other than Red Hat based
ones much easier, though there is still a long way to go.

One of the consequences of this move was a chicken and egg situation
caused by the fact that files had to be present locally before the
distro detection code could kick in, which pretty much stopped
--available-as from working as intended. As a stop-gap solution, I
modified the code to pull down the entire remote tree - an obviously
less than ideal situation since the entire purpose of --available-as
is that you don't need to copy files to cobbler locally. I have just
merged in code that begins to correct this:

https://github.com/cobbler/cobbler/pull/145

Essentially the way it works is a new file is created that acts as a
whitelist for rsync (/etc/cobbler/import_rsync_whitelist) and limits
what files are pulled down when --available-as is specified. This
should work both when using --path=rsync://... and when importing from
a locally mounted ISO (but when you want the bulk of the files to be
pulled from another http/ftp/etc. source). I'm confident most (if not
all) issues with this method can be fixed by adding entries to the
whitelist file, so it should make things less painful since people
won't need to know python to submit fixes.

Example:

$ cobbler import \
> --name=fedora-16-remote \
> --path=rsync://mirrors.kernel.org/mirrors/fedora/releases/16/Fedora/x86_64/os/ \
> --available-as=http://mirrors.kernel.org/fedora/releases/16/Fedora/x86_64/os/
task started: 2012-04-21_072558_import
task started (id=Media import, time=Sat Apr 21 07:25:58 2012)
Found a redhat compatible signature: Packages
adding distros
- Warning : Multiple archs found : ['x86_64', 'i386']
creating new distro: fedora-16-remote-x86_64
creating new profile: fedora-16-remote-x86_64
creating new distro: fedora-16-remote-i386
creating new profile: fedora-16-remote-i386
associating kickstarts
*** TASK COMPLETE ***

$ cobbler distro report --name=fedora-16-remote-x86_64
Name                           : fedora-16-remote-x86_64
Architecture                   : x86_64
TFTP Boot Files                : {}
Breed                          : redhat
Comment                        : fedora16.1
Fetchable Files                : {}
Initrd                         :
/var/www/cobbler/ks_mirror/fedora-16-remote/images/pxeboot/initrd.img
Kernel                         :
/var/www/cobbler/ks_mirror/fedora-16-remote/images/pxeboot/vmlinuz
Kernel Options                 : {}
Kernel Options (Post Install)  : {}
Kickstart Metadata             : {'tree':
'http://mirrors.kernel.org/fedora/releases/16/Fedora/x86_64/os/'}
Management Classes             : []
OS Version                     : fedora16
Owners                         : ['admin']
Red Hat Management Key         : <<inherit>>
Red Hat Management Server      : <<inherit>>
Template Files                 : {}


Caveats:

1) This still requires a lot of testing, and probably won't be in
2.2.3. I'm still getting up to speed on the Debian/Ubuntu and Suse
build process so pretty much all I've done is verify that a
distro/profile pair is imported correctly.

2) Debian/Ubuntu are not well supported with this method, mainly due
to the way their mirrors store all of the distro versions in a
hierarchy that is somewhat jumbled together (all the packages are in
the pool/ directory for every version on the mirror).

As I said above, this has been merged into the master branch on
github, so I'd appreciate any help in testing this. Enjoy!
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