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| This document explains how to build a custom ISO image using the alpine-iso scripts.
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| == Prerequisite ==
| | One way to completely re-build custom images is to use a script like [https://github.com/alpinelinux/alpine-make-vm-image alpine-make-vm-image]. |
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| First make sure we have the needed tools
| | * 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. |
| {{Cmd|apk add alpine-sdk xorriso syslinux}}
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| Then create signing keys (-i installs them in /etc/apk/keys which is required for later)
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| {{Cmd|abuild-keygen -i -a}}
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| Clone (or update) the [http://git.alpinelinux.org/cgit/alpine-iso.git/ alpine-iso git repository].
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| {{Cmd|git clone git://git.alpinelinux.org/alpine-iso}}
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| == Core Configuration ==
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| The alpine-iso scripts is a simple makefile which you need to feed with a ''<name>.conf.mk'' file and a ''<name>.packages''.
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| In the ''<name>.conf.mk'' we specify
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| ;ALPINE_NAME
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| :name of iso image
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| ;ALPINE_VERSION
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| :(optional) version string. Will default to todays date.
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| ;KERNEL_FLAVOR
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| :(optional) either ''grsec'', ''vserver'' or ''pae''. Will default to grsec.
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| ;MODLOOP_EXTRA
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| :(optional) Extra kernel module packages for the modloop image. For example: ''dahdi-linux-vserver''
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| ;APK_REPOS
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| :(optional) Path to addidtional apk repository.
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| 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.
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| == A rescue CD example ==
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| As an example, let us make a rescue ISO image with packages needed for rescue operations. We call it ''alpine-rescue''
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| We create the ''alpine-rescue.conf.mk'' as follows:
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| ALPINE_NAME := alpine-rescue
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| KERNEL_FLAVOR := grsec
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| MODLOOP_EXTRA :=
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| 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.
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| And then the ''alpine-rescue.packages'' as:
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| alpine-base
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| bkeymaps
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| openssh
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| e2fsprogs
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| mdadm
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| lvm2
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| parted
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| debootstrap
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| ntfs-3g
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| {{Tip| Make sure your public keys are placed in /etc/apk/keys/ (example: root-xxxxxxxx.rsa.pub):
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| {{Cmd|ls /etc/apk/keys/}}
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| Learn apk-tools to find your home-built apk's:
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| {{Cmd|echo "~/.cache/abuild/" >> /etc/apk/repositories}}
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| }}
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| Make sure the apk index is up to date (so apk finds the packages):
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| {{Cmd|apk update}}
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| We create the ISO image by telling the makefile the profile name. The makefile target is ''iso''.
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| {{Cmd|<nowiki>make PROFILE=alpine-rescue iso</nowiki>}}
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| {{Tip| If you are building inside an LXC guest, use fakeroot:
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| {{Cmd|<nowiki>fakeroot make PROFILE=alpine-rescue iso</nowiki>}}
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| }}
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| To generate the sha256 sum we use the ''sha256'' make target.
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| {{Cmd|<nowiki>make PROFILE=alpine-rescue sha256</nowiki>}}
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| == Package lists ==
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| 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 plain text description by <code>apk search --exact -v $(cat alpine.packages)</code>.
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| So far the lists below are available (check [[:Category:ISO|here]] for more.)
| | == An alternative == |
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| * [[Alpine_mini|Alpine Mini]]
| | It's possible to [[Alpine_local_backup#|commit and load ISO image customizations]] to and from disk. |
| * [[Alpine_rescue|Alpine Rescue]]
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| * [[Alpine_security|Alpine Security]]
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| * [[Alpine SCST]]
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| == Live Disk Setup with APKOVL ==
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| Once you have customized your custom ISO, you can now setup the live environment to operate outside of the standard installer as follows:
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| * Generate an APKOVL file with [[Alpine_local_backup|lbu]], <code>lbu ci</code>
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| * Alpine ISO requires the OVL Volume to be hosted on a web server. Put the APKOVL file on a webserver and identify the url.
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| * Uncomment the <code>APKOVL</code> line in the alpine flavor of your choice and set it to the address of your ovl volume.
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| Notes:
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| * Any packages you add to /etc/apk/world of your lbu will automatically be installed onto the live system image.
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| * If you don't have a web server you can run busybox's httpd temporarily - <code>busybox -p 127.0.0.1:80</code>
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| * In general, <code>lbu</code> will only handle files in <code>/etc</code>, to customize this further, you need to add additional files.
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| * 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.
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| == Testing your ISO image == | | == Booting an ISO image with local customizations == |
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| [[Qemu#Live_mode| Qemu]] is useful for a quick test of your created ISO image. | | * From a dedicated boot media, obviously. |
| | * [[Directly_booting_an_ISO_file]] |
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| [[Category:Package Manager]] | | [[Category:Package Manager]] |
| [[Category:ISO]] | | [[Category:ISO]] |