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flatcar.pkr.hcl
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flatcar.pkr.hcl
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packer {
required_plugins {
hcloud = {
source = "github.com/hetznercloud/hcloud"
version = "~> 1.4.0"
}
}
}
variable "hcloud_token" {
type = string
default = "${env("HCLOUD_TOKEN")}"
sensitive = true
}
variable "hcloud_server_type" {
type = map(string)
default = {
x86 = "cx22"
arm = "cax11"
}
}
variable "channel" {
type = string
default = "beta"
}
variable "version" {
type = string
default = "current"
}
variable "labels" {
// Available replacements:
// $architecture
// $channel
// $version - if "current" was specified, this is resolved to the actual version
type = map(string)
default = {
os = "flatcar"
flatcar-channel = "$channel"
version = "$version"
architecture = "$architecture"
}
}
locals {
architectures = ["x86", "arm"]
// If the user wants the "current" version, we still want to make the
// actual version id available through labels + snapshot description
//
// regex matches: FLATCAR_VERSION=1234.0.0
version = regex("FLATCAR_VERSION=(\\d+\\.\\d+\\.\\d+)", data.http.version_info.body)[0]
}
data "http" "version_info" {
// We assume that both boards have the same version
url = "https://${var.channel}.release.flatcar-linux.net/amd64-usr/${var.version}/version.txt"
}
source "hcloud" "flatcar" {
token = var.hcloud_token
image = "ubuntu-24.04"
location = "fsn1"
rescue = "linux64"
ssh_username = "root"
}
build {
dynamic "source" {
for_each = local.architectures
labels = ["hcloud.flatcar"]
content {
name = source.value
server_type = var.hcloud_server_type[source.value]
snapshot_name = "flatcar-${var.channel}-${local.version}-${source.value}"
snapshot_labels = {
for k, v in var.labels : k => replace(replace(replace(v,
"$channel", var.channel),
"$version", local.version),
"$architecture", source.value)
}
}
}
provisioner "shell" {
inline = [
# Download script and dependencies
"apt-get -y install gawk",
"curl -fsSLO --retry-delay 1 --retry 60 --retry-connrefused --retry-max-time 60 --connect-timeout 20 https://raw.githubusercontent.com/flatcar/init/flatcar-master/bin/flatcar-install",
"chmod +x flatcar-install",
# Install flatcar
"./flatcar-install -s -o hetzner -C ${var.channel} -V ${var.version} ",
]
}
}