Update LUKS unlock wait behavior

This commit is contained in:
Philip Henning 2026-02-05 18:42:02 +01:00
parent fccecfde5d
commit 66dd860c3f
2 changed files with 99 additions and 18 deletions

View file

@ -15,6 +15,7 @@ from __future__ import annotations
import argparse
import random
import subprocess
import sys
import threading
import time
from http.server import BaseHTTPRequestHandler, HTTPServer
@ -46,11 +47,17 @@ def main() -> int:
required=True,
help="Path to directory containing variables.pkr.hcl (also passed to mise build).",
)
parser.add_argument(
"--luks-wait-seconds",
type=int,
default=45,
help="Seconds to wait before sending the LUKS password (default: 45).",
)
args = parser.parse_args()
script_root = Path(__file__).resolve().parents[1]
variables_common_path = script_root / "variables-common.pkr.hcl"
credentials_path = script_root / "debian/13-trixie/credentials.auto.pkrvars.hcl"
credentials_path = script_root / "credentials.auto.pkrvars.hcl"
vars_dir = Path(args.template)
if not vars_dir.is_absolute():
vars_dir = script_root / vars_dir
@ -101,16 +108,66 @@ def main() -> int:
port, httpd = find_random_port()
def stream_colors(stream: object) -> tuple[str, str]:
color = ""
reset = ""
is_tty = getattr(stream, "isatty", None)
if callable(is_tty) and is_tty():
if stream is sys.stderr:
color = "\033[31m"
else:
color = "\033[36m"
reset = "\033[0m"
return color, reset
def log(message: str, stream: object = sys.stdout) -> None:
color, reset = stream_colors(stream)
stream.write(f"{color}[luks-unlock-wrapper] {message}{reset}\n")
stream.flush()
def write_status(message: str, stream: object = sys.stdout, *, newline: bool) -> None:
color, reset = stream_colors(stream)
is_tty = getattr(stream, "isatty", None)
prefix = f"{color}[luks-unlock-wrapper] "
suffix = f"{reset}\n" if newline else reset
if callable(is_tty) and is_tty():
stream.write(f"\r\033[2K{prefix}{message}{suffix}")
else:
stream.write(f"{prefix}{message}{suffix}")
stream.flush()
def serve() -> None:
httpd.serve_forever()
server_thread = threading.Thread(target=serve, daemon=True)
server_thread.start()
print(f"Listening for POST on /install_finished at port {port}")
log(f"Listening for POST on /install_finished at port {port}")
build_cmd = ["mise", "build", args.template, "-i", str(port)]
build_proc = subprocess.Popen(build_cmd)
build_proc = subprocess.Popen(
build_cmd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True,
bufsize=1,
)
def relay_stream(stream: object, prefix: str, target: object) -> None:
if not stream:
return
for line in stream:
target.write(f"{prefix} {line}")
target.flush()
stdout_thread = threading.Thread(
target=relay_stream, args=(build_proc.stdout, "[packer]", sys.stdout), daemon=True
)
stderr_thread = threading.Thread(
target=relay_stream, args=(build_proc.stderr, "[packer]", sys.stderr), daemon=True
)
stdout_thread.start()
stderr_thread.start()
notified = False
action_started = False
@ -148,28 +205,52 @@ def main() -> int:
try:
response = proxmox_request("GET", "/version")
response.raise_for_status()
print("Authenticated to Proxmox VE API.")
log("Authenticated to Proxmox VE API.")
break
except Exception as exc:
print(f"Proxmox auth failed: {exc}. Retrying in {retry_delay}s.")
log(
f"Proxmox auth failed: {exc}. Retrying in {retry_delay}s.",
stream=sys.stderr,
)
time.sleep(retry_delay)
retry_delay += 1
try:
print("Waiting 45 seconds before sending LUKS password.")
time.sleep(45)
countdown_seconds = max(0, args.luks_wait_seconds)
# Braille spinner: 8 dots, one missing dot rotates clockwise.
full_mask = 0xFF # dots 1-8
dot_bits = {
1: 0x01,
2: 0x02,
3: 0x04,
4: 0x08,
5: 0x10,
6: 0x20,
7: 0x40,
8: 0x80,
}
rotation = [1, 4, 5, 6, 8, 7, 3, 2] # clockwise around the cell
spinner = [chr(0x2800 + (full_mask - dot_bits[dot])) for dot in rotation]
for remaining in range(countdown_seconds, -1, -1):
minutes, seconds = divmod(remaining, 60)
countdown = f"{minutes:02d}:{seconds:02d}"
frame = spinner[(countdown_seconds - remaining) % len(spinner)]
write_status(f"{frame} {countdown}", newline=False)
if remaining:
time.sleep(1)
write_status(f"{spinner[0]} 00:00", newline=True)
for char in "packer":
send_key(char)
time.sleep(0.1)
send_key("ret")
print("Sent LUKS password and Enter.")
log("Unlocking encrypted disk. Entering LUKS password.")
except Exception as exc:
print(f"Post-install actions failed after auth: {exc}")
log(f"Post-install actions failed after auth: {exc}", stream=sys.stderr)
try:
while True:
if server_event.is_set() and not notified:
print("Installation finished.\nRestarting.")
log("Installation finished.\nRestarting.")
notified = True
if server_event.is_set() and not action_started:
action_started = True

View file

@ -7,7 +7,7 @@ packer {
}
}
source "proxmox-iso" "debian-13-trixie" {
source "proxmox-iso" "debian-13-trixie-luks" {
# Proxmox Connection Settings
proxmox_url = "${var.proxmox_api_url}"
username = "${var.proxmox_api_token_id}"
@ -19,8 +19,8 @@ source "proxmox-iso" "debian-13-trixie" {
# VM General Settings
node = "${var.proxmox_node}"
vm_id = "${var.template_vm_id}"
vm_name = "debian-13-trixie-${local.timestamp}"
template_description = "Debian 13 Trixie, built with Packer on ${local.timestamp}"
vm_name = "debian-13-trixie-luks-${local.timestamp}"
template_description = "Debian 13 Trixie, LUKS encrypted, built with Packer on ${local.timestamp}"
os = "l26"
qemu_agent = true
@ -82,7 +82,7 @@ source "proxmox-iso" "debian-13-trixie" {
]
# PACKER Autoinstall Settings
http_directory = "debian/13-trixie/http"
http_directory = "debian/13-trixie-luks/http"
http_interface = "${var.source_proxmox_http_interface}"
# SSH Settings
@ -93,8 +93,8 @@ source "proxmox-iso" "debian-13-trixie" {
}
build {
name = "debian-13-trixie-image"
sources = ["source.proxmox-iso.debian-13-trixie"]
name = "debian-13-trixie-luks-image"
sources = ["source.proxmox-iso.debian-13-trixie-luks"]
# Provisioning the VM Template for Cloud-Init Integration in Proxmox #1
provisioner "shell" {
@ -113,7 +113,7 @@ build {
# Provisioning the VM Template for Cloud-Init Integration in Proxmox #2
provisioner "file" {
source = "debian/13-trixie/files/99-pve.cfg"
source = "debian/13-trixie-luks/files/99-pve.cfg"
destination = "/tmp/99-pve.cfg"
}
@ -129,7 +129,7 @@ build {
# Add custom APT sources list
provisioner "file" {
source = "debian/13-trixie/files/debian.sources"
source = "debian/13-trixie-luks/files/debian.sources"
destination = "/etc/apt/sources.list.d/debian.sources"
}
}