Repository – What is the Size of the Ubuntu Repository?

I answer myself:

• Setting no_proxy solve the problem:

export no_proxy="192.168.0.0/16,localdomain"

but warning is displayed:

WARNING: Failed to read mirror file

No valid mirror found 

While scanning your repository information no mirror entry for the 
upgrade was found. This can happen if you run a internal mirror or if 
the mirror information is out of date. 

Do you want to rewrite your 'sources.list' file anyway? If you choose 
'Yes' here it will update all 'lucid' to 'precise' entries. 
If you select 'No' the upgrade will cancel. 

The CD repository and software repository are two distinct components (they even have separate Launchpad pages: cdmirrors and archivemirrors). Therefore, mirroring them are two distinct tasks. Further, while the various flavours have different folders on the CD repository, they share a software repository. So you can selectively mirror the images per flavour, but not the software. For the software repository, you can selectively mirror based on:

• release (trusty, precise, etc.)
• architecture (amd64, i386, etc.)
• package type (binary [deb] vs source [deb-src])
• channels (trusty, trusty-updates, trusty-backports, etc.)
• sections (main, multiverse, etc.)

To mirror the software repository, use apt-mirror.

apt-mirror is configured using /etc/apt/mirror.list. It has a format very similar to sources.list. The configuration file installed by the package has a few commented out options which list their defaults. If you wish, you can uncomment and change them.

To mirror a repository, you need to add a line to mirror.list like you would for sources.list:

deb http://us.archive.ubuntu.com/ubuntu trusty main multiverse restricted universe

The default is to mirror only the host's architecture, so if you're on a 64-bit Ubuntu, only amd64 will be mirrored. You need to add another line of the form:

deb-i386 http://us.archive.ubuntu.com/ubuntu trusty main multiverse restricted universe

And for source packages:

deb-src http://us.archive.ubuntu.com/ubuntu trusty main multiverse restricted universe

If you're looking for a reasonably complete mirror, these lines would be the minimum (I would also recommend -updates channel):

deb http://us.archive.ubuntu.com/ubuntu trusty main multiverse restricted universe
deb http://us.archive.ubuntu.com/ubuntu trusty-security main multiverse restricted universe
deb-i386 http://us.archive.ubuntu.com/ubuntu trusty main multiverse restricted universe
deb-i386 http://us.archive.ubuntu.com/ubuntu trusty-security main multiverse restricted universe

Finally, you need to add a clean line so that packages no longer available in the repository are filtered for removal:

clean http://us.archive.ubuntu.com/ubuntu

Say your variables are thus (the defaults):

set base_path    /var/spool/apt-mirror
set mirror_path  $base_path/mirror
set skel_path    $base_path/skel
set var_path     $base_path/var
set cleanscript $var_path/clean.sh

Then:

• The repository will be mirrored to $mirror_path/parent-hostname/directory (so /var/spool/apt-mirror/mirror/us.archive.ubuntu.com/ubuntu)
• The clean.sh (which will be a set of rm commands to delete obsolete packages and directories) will be /var/spool/apt-mirror/var/clean.sh.
• The logs will go to /var/spool/apt-mirror/var.

The apt-mirror package installs a cron job (/etc/cron.d/apt-mirror), which you should edit to enable (by uncommenting the line containing /usr/bin/apt-mirror). You should also add a cron job for running clean.sh (I run it weekly).

Of course, you should replace http://us.archive.ubuntu.com./ubuntu with whichever mirror you prefer.