How to make a custom ISO image: Difference between revisions

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This document explains how to build a custom ISO image using the alpine-iso scripts.


First make sure we have the needed tools
== ISO remastering ==
{{Cmd|apk add alpine-sdk}}


Then we clone (or update) the [http://git.alpinelinux.org/cgit/alpine-iso.git/ alpine-iso git repository].
There are scripts to re-build completely custom images, like
{{Cmd|git clone git://git.alpinelinux.org/alpine-iso}}
* [https://github.com/alpinelinux/alpine-make-vm-image alpine-make-vm-image]
and the original
* [[How_to_make_a_custom_ISO_image_with_mkimage|mkimg]].


The alpine-iso scripts is a simple makefile which you need to feed with a ''<name>.conf.mk'' file and a ''<name>.packages''.


In the ''<name>.conf.mk'' we specify
If you want to make a customized installer, you need to create <code>.default_boot_services</code> which will cause <code>mkinitfs</code> to create the defaults for the live image.


;ALPINE_NAME
:name of iso image


;ALPINE_VERSION
== An alternative ==
:(optional) version string. Will default to todays date.


;KERNEL_FLAVOR
It's possible to [[Alpine_local_backup#|commit and load ISO image customizations]] to and from a writable storage.
:(optional) either ''grsec'', ''vserver'' or ''pae''. Will default to grsec.


;MODLOOP_EXTRA
:(optional) Extra kernel module packages for the modloop image. For example: ''dahdi-linux-vserver''


The ''<name>.packages'' is just a plaintext list of packages that should be included in the ISO image. You should always add ''alpine-base'' in there or the CD might not be able to boot. The dependencies for the packages will automatically be pulled in.


== A rescue CD example ==
== Booting an ISO image with local customizations ==
As an example, let us make a rescue ISO image with packages needed for rescue operations. We call it ''alpine-rescue''


We create the ''alpine-rescue.conf.mk'' as follows:
* From a dedicated boot media, obviously.
ALPINE_NAME  := alpine-rescue
* [[Directly_booting_an_ISO_file]]
KERNEL_FLAVOR := grsec
MODLOOP_EXTRA :=


And then the ''alpine-rescue.packages'' as:
[[Category:Package Manager]]
alpine-base
[[Category:ISO]]
bkeymaps
openssh
e2fsprogs
mdadm
lvm2
parted
debootstrap
ntfs-3g
 
{{Tip|If you have home-built APKs that you would like to include in the ISO image you are about to create:
Make sure your developer keys are placed in /etc/apk/keys/
 
Learn apk-tools to find your home-built apk's:
{{Cmd|echo "~/.cache/apks" >> /etc/apk/repositories}}
}}
 
Make sure the apk index is up to date (so apk finds the packages):
{{Cmd|apk update}}
 
We create the ISO image by telling the makefile the profile name. The makefile target is ''iso''.
{{Cmd|<nowiki>make PROFILE=alpine-rescue iso</nowiki>}}
 
To generate the sha1 sum we use the ''sha1'' make target.
{{Cmd|<nowiki>make PROFILE=alpine-rescue sha1</nowiki>}}
 
== Package lists ==
 
Beside the plaintext package lists in the git repository, there are more documented package lists contributed by Alpine users. Those lists can be transformed into a plaintext to use with <tt>alpine-iso</tt> list with the simple python-based <tt>[http://git.alpinelinux.org/cgit/alpine-iso.git/tree/config-builder.py config-builder.py]</tt> script.
 
So far the lists below are available:
 
* [[Alpine_mini|Alpine Mini]]
* [[Alpine_rescue|Alpine Rescue]]
* [[Alpine_security|Alpine Security]]
 
== Testing your ISO image ==
 
[[Qemu#Live_mode| Qemu]] is useful for a quick test of your created ISO image.

Revision as of 20:48, 21 June 2020

ISO remastering

There are scripts to re-build completely custom images, like

and the original


If you want to make a customized installer, you need to create .default_boot_services which will cause mkinitfs to create the defaults for the live image.


An alternative

It's possible to commit and load ISO image customizations to and from a writable storage.


Booting an ISO image with local customizations