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--- linux:repomirror [2023/02/12 18:16] – created olaf
+++ linux:repomirror [2023/03/04 09:21] (current) – Corrected link olaf
@@ Line 1: / Line 1: @@
+===== Mirror a repository =====
+When running a Debian system (Debian, Ubuntu, Cumulus, ...) without internet connection, it cannot receive upgrades with ''apt update && apt upgrade -y''\\
+But with any Debian based system that is online, it is possible to download the required packages and dependencies (!).
+With only a very few systems at the same patchlevel, it might be quicker to just download the required packages as in [[linux:aptoffline|Repository for offline systems]].
+But, when the systems are at different patch levels or to ensure a system can be recovered from an image after a disaster it might be valuable to have a full repository of the used distribution.
+==== Install the required software to mirror a repository ====
+<code bash>
+apt install apt-mirror -y
+</code>
+This contains everything needed to replicate a repository
+I am using the fictitious distribution FreeDebian - replce it with the actually required distro.
+It created /etc/apt/mirror.list that needs to be amended.
+We need only a few active lines, but I left some commented defaults, just for information what it sets.
+<code list>
+############# config ##################
+#
+set base_path    /var/spool/apt-mirror/freedebian
+#
+# set mirror_path  $base_path/mirror
+# set skel_path    $base_path/skel
+# set var_path     $base_path/var
+# set cleanscript $var_path/clean.sh
+# set defaultarch  <running host architecture>
+# set postmirror_script $var_path/postmirror.sh
+# set run_postmirror 0
+set nthreads     20
+set _tilde 0
+#
+############# end config ##############
+# if only one architecture (i386, amd64, ...) is required, add it at the end of the leading deb. The example shows that for 64-bit x86 architecture
+# for multiples (but not all available) issue a line for each
+# for all available architectures, just use one line with deb (without -extension)
+# Source repositories
+deb-amd64 [signed-by=/etc/apt/trusted.gpg.d/freedebian.gpg] https://deb.freedebian.org/freedebian unstable main contrib non-free
+deb-src-amd64 [signed-by=/etc/apt/trusted.gpg.d/freedebian.gpg] https://fdeb.freedebian.org/freedebian unstable main contrib non-free
+clean http://deb.freedebian.org/freedebian
+</code>
+==== Create the directory for the repositories ====
+<code bash>
+mkdir /var/spool/apt-mirror/freedebian
+</code>
+Start the replication with <code bash>apt-mirror</code> or as background task with <code bash>apt-mirror &</code>
+When the replication is finished, the whole directory should be packed and moved to the offline system for publication.
+<code bash>
+tar -czPf freedebian.tar.gz /var/spool/apt-mirror/freedebian/</code>
+==== Create a repository server on the offline network ====
+On the target network with a fresh Debian installation run ''tasksel'' and select the ''web server''.\\
+That will install apache2 with a standard, non-ssl web site active, with the files at ''/var/www/html/''\\
+Unpack the archive created online:<code bash>
+tar -xvzPf freedebian.tgz
+</code>
+link the repository to the web site:<code bash>
+ln -s /var/spool/apt-mirror/freedebian/deb.freedebian.org/repo /var/www/html/repo
+</code>
+==== Modify sources.list and install updates ====
+On the clients that should use the repository modify ''/etc/apt/sources.list'', replacing the URI of the source repository with the IP of the server installed in the step before. Ensure to use http (or configure SSL on the server).
+<code>
+deb [arch=amd64] http://192.168.100.41/repo FreeDebian main updates non-free
+deb-src [arch=amd64] http://192.168.100.41/repo FreeDebian main updates non-free
+</code>
+Update apt and upgrade the client device:
+<code bash>apt update && apt dist-upgrade </code>
+Done.

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