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 third party 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]
(works to only make a disk based VM image)


The alpine-iso scripts is a simple makefile which you need to feed with a ''<name>.conf.mk'' file and a ''<name>.packages''.
and there is Alpine's original
* [[How_to_make_a_custom_ISO_image_with_mkimage|mkimg]].  
(creates a diskless ISO file - usually what you want for QEMU and Proxmox)


In the ''<name>.conf.mk'' we specify


;ALPINE_NAME
:name of iso image


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


;KERNEL_FLAVOR
It's also possible to commit and load ISO image customizations to and from a writable partition when booting in [[Installation#Diskless_Mode|Diskless Mode]].
:(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''


;APK_REPOS
:(optional) Path to addidtional apk repository.


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.
== Booting an ISO image with local customizations ==


== A rescue CD example ==
* [[Directly booting an ISO file]]
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:
ALPINE_NAME  := alpine-rescue
KERNEL_FLAVOR := grsec
MODLOOP_EXTRA :=
 
If you are going to use a custom kernel, don't forget to specify KERNEL_FLAVOR_DEFAULT which will set the default kernel to boot.
 
And then the ''alpine-rescue.packages'' as:
alpine-base
bkeymaps
openssh
e2fsprogs
mdadm
lvm2
parted
debootstrap
ntfs-3g
 
{{Tip| Make sure your public keys are placed in /etc/apk/keys/ (example: root-xxxxxxxx.rsa.pub):
{{Cmd|ls /etc/apk/keys/}}
 
Learn apk-tools to find your home-built apk's:
{{Cmd|echo "~/.cache/abuild/" >> /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>}}
 
{{Tip| If you are building inside an LXC guest, use fakeroot:
{{Cmd|<nowiki>fakeroot 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/fab/alpine-iso/tree/config-builder.py config-builder]</tt> script.
 
So far the lists below are available (check [[:Category:ISO|here]] for more.)
 
* [[Alpine_mini|Alpine Mini]]
* [[Alpine_rescue|Alpine Rescue]]
* [[Alpine_security|Alpine Security]]
* [[Alpine SCST]]
 
== Testing your ISO image ==
 
[[Qemu#Live_mode| Qemu]] is useful for a quick test of your created ISO image.


[[Category:Package Manager]]
[[Category:Package Manager]]
[[Category:ISO]]
[[Category:ISO]]

Latest revision as of 04:29, 12 January 2024

ISO remastering

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

(works to only make a disk based VM image)

and there is Alpine's original

(creates a diskless ISO file - usually what you want for QEMU and Proxmox)


An alternative

It's also possible to commit and load ISO image customizations to and from a writable partition when booting in Diskless Mode.


Booting an ISO image with local customizations