Initial setup

.gitignore

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+config.json

.gitmodules

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+[submodule "alpine-on-hetzner"]
+	path = alpine-on-hetzner
+	url = https://github.com/MathiasPius/alpine-on-hetzner.git

Makefile

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+ALPINE_VERSION:=3.17.0
+PACKER_VERSION:=1.8.4-r2
+ANSIBLE_CORE_VERSION:=2.13.6-r0
+JQ_VERSION:=1.6-r2
+
+export DOCKER_BUILDKIT:=1
+
+default:
+
+config.json:
+	yq -S . config.yaml >config.json
+
+create-snapshot: docker-build config.json
+	envrun -- docker run --rm -i \
+		-e "HCLOUD_TOKEN" \
+		-v "$(CURDIR):/config:ro" \
+		registry.local/alpine-on-hetzner:latest \
+		/config/config.json
+
+docker-build:
+	docker build \
+		--build-arg ALPINE_VERSION=$(ALPINE_VERSION) \
+		--build-arg PACKER_VERSION=$(PACKER_VERSION) \
+		--build-arg ANSIBLE_CORE_VERSION=$(ANSIBLE_CORE_VERSION) \
+		--build-arg JQ_VERSION=$(JQ_VERSION) \
+		-t registry.local/alpine-on-hetzner \
+		./alpine-on-hetzner
+
+.PHONY: config.json

alpine-on-hetzner

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+Subproject commit 1d21f3e35c65bcef267c0f98144d3e5d4ab3c4a3

config.yaml

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+---
+
+apk_tools_version: v2.12.10
+apk_tools_arch: x86_64
+apk_tools_url: https://gitlab.alpinelinux.org/api/v4/projects/5/packages/generic//{{ apk_tools_version }}/{{ apk_tools_arch }}/apk.static
+apk_tools_checksum: sha256:d7506bb11327b337960910daffed75aa289d8bb350feab624c52965be82ceae8
+
+alpine_version: edge
+alpine_mirror: http://dl-cdn.alpinelinux.org/alpine
+alpine_repositories: [ main, community, testing ]
+
+boot_size: +100m
+root_size: '0'
+hostname: alpine-k8s
+
+packages:
+  # Alpine base system
+  openssh: ''
+  syslinux: ''
+  linux-virt: ''
+  cloud-init: '@community'
+
+  # K8s requirements
+  open-iscsi: ''
+  open-iscsi-openrc: ''
+
+  cni-plugin-flannel: '@community'
+  cni-plugins: '@community'
+  flannel: '@testing'
+  flannel-contrib-cni: '@testing'
+  docker: '@community'
+  uuidgen: ''
+  nfs-utils: ''
+
+  kubelet: '@testing=1.25.0-r4'
+  kubeadm: '@testing=1.25.0-r4'
+  kubectl: '@testing=1.25.0-r4'
+
+services:
+  devfs: sysinit
+  dmesg: sysinit
+  mdev: sysinit
+  hwdrivers: sysinit
+
+  hwclock: boot
+  modules: boot
+  sysctl: boot
+  hostname: boot
+  bootmisc: boot
+  syslog: boot
+  networking: boot
+
+  mount-ro: shutdown
+  killprocs: shutdown
+  savecache: shutdown
+
+  sshd: default
+
+  # K8s requirements
+  docker: default
+  iscsid: default
+  kubelet: default
+  ntpd: default
+
+nameservers:
+  - 185.12.64.1
+  - 185.12.64.2
+  - 2a01:4ff:ff00::add:1
+  - 2a01:4ff:ff00::add:2
+
+sysctl: {}
+
+extlinux_modules:
+  - ext4
+
+kernel_features:
+  - base
+  - ext4
+  - keymap
+  - virtio
+
+kernel_modules:
+  - ipv6
+  - af_packet
+
+default_kernel_opts:
+  - quiet
+
+chroot_commands:
+  # kernel stuff
+  - 'echo "br_netfilter" >/etc/modules-load.d/k8s.conf'
+  - 'echo "net.bridge.bridge-nf-call-iptables=1" >>/etc/sysctl.conf'
+
+  # Fix prometheus errors
+  - 'echo -e "#!/bin/sh\nmount --make-rshared /" >/etc/local.d/sharemetrics.start'
+  - 'chmod +x /etc/local.d/sharemetrics.start'
+  - 'rc-update add local'
+
+...