coreos-base/oem-hcloud: add hetzner cloud support

coreos-base/oem-hcloud/files/base/README

@@ -0,0 +1,4 @@
+These Ignition configs are part of the OEM configuration. Do not modify
+them. If you want to write an Ignition config directly to disk, put it in
+../config.ign and it will be applied at first boot instead of a config
+in userdata.

coreos-base/oem-hcloud/files/base/base.ign

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+{
+  "ignition": {
+    "version": "2.1.0"
+  },
+  "systemd": {
+    "units": [
+      {
+        "name": "[email protected]",
+        "enabled": true
+      },
+      {
+        "name": "coreos-metadata.service",
+        "enabled": true
+      },
+      {
+        "contents": "[Unit]\nDescription=Setting the hostname from the metadata\n\n[Service]\nType=oneshot\nEnvironment=COREOS_METADATA_OPT_PROVIDER=--cmdline\nExecStart=/usr/bin/coreos-metadata ${COREOS_METADATA_OPT_PROVIDER} --hostname=/etc/hostname\n\n[Install]\nRequiredBy=multi-user.target",
+        "enable": true,
+        "name": "coreos-metadata-hostname.service"
+      }
+    ]
+  }
+}

coreos-base/oem-hcloud/files/base/default.ign

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+{
+  "ignition": {
+    "config": {},
+    "security": {
+      "tls": {}
+    },
+    "timeouts": {},
+    "version": "2.2.0"
+  },
+  "networkd": {},
+  "passwd": {},
+  "storage": {},
+  "systemd": {}
+}

coreos-base/oem-hcloud/files/grub.cfg

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+# CoreOS GRUB settings
+
+set oem_id="hcloud"

coreos-base/oem-hcloud/files/oem-release

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+ID=hcloud
+VERSION_ID=@@OEM_VERSION_ID@@
+NAME="Hetzner Cloud"
+HOME_URL="https://www.hetzner.com/cloud"
+BUG_REPORT_URL="https://issues.coreos.com"

coreos-base/oem-hcloud/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+</pkgmetadata>

coreos-base/oem-hcloud/oem-hcloud-0.1.ebuild

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+# Copyright (c) 2018 CoreOS, Inc.. All rights reserved.
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=5
+
+DESCRIPTION="OEM suite for Hetzner Cloud images"
+HOMEPAGE=""
+SRC_URI=""
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="amd64 x86"
+
+# no source directory
+S="${WORKDIR}"
+
+src_prepare() {
+	sed -e "s\\@@OEM_VERSION_ID@@\\${PVR}\\g" \
+	    "${FILESDIR}/oem-release" > "${T}/oem-release" || die
+}
+
+src_install() {
+	insinto "/usr/share/oem"
+	doins "${FILESDIR}/grub.cfg"
+	doins "${T}/oem-release"
+	doins -r "${FILESDIR}/base"
+}