Alpine Linux support

[SamuelMarks]

Description

Add Alpine Linux builds; basically a simple rewrite of the Fedora one

FYI: Testing on macOS (M3) with:

$ gem build bento.gemspec
$ gem install bento-*.gem
$ bento build --cpus 2 os_pkrvars/alpine/alpine-3.21-aarch64.pkrvars.hcl

Related Issue

Closes #1607

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (non-breaking change that does not add functionality or fix an issue)

Checklist:

• I have read the CONTRIBUTING document.
• I have run the pre-merge tests locally and they pass.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• If Gemfile.lock has changed, I have used --conservative to do it and included the full output in the Description above.
• All new and existing tests passed.
• All commits have been signed-off for the Developer Certificate of Origin.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[rubisher]

Hello Samuel,
I was just looking for a support of Alpine in Bento to easily create my customized VBox images.
As much more interested in x86_64 virtual box images, I tried that first but the default boot_command is not understand by alpine boot process also I try to figure out how to start an unattended config and would like to suggest this first update:

diff --git a/os_pkrvars/alpine/alpine-3.21-x86_64.pkrvars.hcl b/os_pkrvars/alpine/alpine-3.21-x86_64.pkrvars.hcl
index 18a3b15..39ae540 100644
--- a/os_pkrvars/alpine/alpine-3.21-x86_64.pkrvars.hcl
+++ b/os_pkrvars/alpine/alpine-3.21-x86_64.pkrvars.hcl
@@ -6,4 +6,15 @@ iso_checksum            = "file:https://dl-cdn.alpinelinux.org/alpine/v3.21/rele
 parallels_guest_os_type = "otherlinux"
 vbox_guest_os_type      = "ArchLinux_64"
 vmware_guest_os_type    = "otherlinux-64"
-boot_command            = ["<wait><up>e<wait><down><down><end> inst.ks=http://{{ .HTTPIP }}:{{ .HTTPPort }}/fedora/ks.cfg inst.repo=https://download.fedoraproject.org/pub/fedora/linux/releases/41/Server/x86_64/os/ <F10><wait>"]
+boot_command            = ["<wait10>root<enter>ifconfig eth0 up<enter>",
+"setup-interfaces<enter><enter><enter><enter>",
+"setup-keymap<enter>us<enter>us<enter>",
+"setup-hostname<enter>alpinet1<enter>",
+"setup-timezone<enter>GMT<enter>",
+"setup-proxy<enter>none<enter>",
+"setup-ntp<enter>chrony<enter>",
+"setup-apkrepos<enter>c<enter><enter>",
+"setup-user -u vagrant<enter>",
+"setup-sshd<enter>openssh<enter>",
+"setup-disk<enter>sda<enter>lvm<enter>sys<enter>y<enter>",
+"reboot<enter>"]

This already help to setup vm but packer is not yet already able to connect to this vm via ssh :(
Any idea?

Thanks a lot for your nice job,
Rudy

[SamuelMarks]

@rubisher Yeah I tried this one also https://wiki.alpinelinux.org/wiki/Packer_installation

The closest I've gotten to a working build is https://github.com/SamuelMarks/alpine-packer/tree/3.21

But would prefer the bento build working as it supports more VM systems (hypervisors, vendors) and architectures. The alpine IRC channel is the closest we'll get to official support on this FYI

In the meantime happy to collab

[Stromweld]

nice work so far guys thanks for the addition. let me know if you need any extra help. I've been pretty busy with work lately so I've been a bit spotty on further updates in here.