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This commit is contained in:
153
setup_host.py
Executable file
153
setup_host.py
Executable file
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import subprocess
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import os
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import sys
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import argparse
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import time
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import json
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def run_command(command_str, description, ignore_errors=False):
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print(f"\n--- {description} ---")
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try:
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process = subprocess.run(
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command_str, shell=True, text=True, check=not ignore_errors, capture_output=True)
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if process.returncode == 0:
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print(f"--- ERFOLG: {description} ---")
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return process
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else:
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raise subprocess.CalledProcessError(
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process.returncode, command_str, output=process.stdout, stderr=process.stderr)
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except subprocess.CalledProcessError as e:
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print(f"FEHLER bei '{description}': Befehl '{
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e.cmd}' gab den Exit-Code {e.returncode} zurück", file=sys.stderr)
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if e.stdout:
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print(f"STDOUT:\n{e.stdout}", file=sys.stderr)
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if e.stderr:
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print(f"STDERR:\n{e.stderr}", file=sys.stderr)
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if not ignore_errors:
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sys.exit(1)
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return None
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def wait_for_network(container_name):
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print(f"\n--- Warte auf Netzwerk für Container '{container_name}' ---")
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for i in range(30):
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print(f"Versuch {i+1}/30...")
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try:
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result = run_command(f"lxc list {container_name} --format json", "Frage Container-Status ab", ignore_errors=True)
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if result and result.returncode == 0:
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data = json.loads(result.stdout)
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if data and data[0]["state"] and data[0]["state"]["network"] and "eth0" in data[0]["state"]["network"]:
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addresses = data[0]["state"]["network"]["eth0"]["addresses"]
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for addr in addresses:
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if addr["family"] == "inet":
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print(f"Container '{container_name}' hat IP-Adresse {addr['address']} erhalten.")
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return
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except (json.JSONDecodeError, IndexError, KeyError):
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pass
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time.sleep(2)
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print(f"FEHLER: Container '{container_name}' hat nach 60 Sekunden keine IP-Adresse erhalten.", file=sys.stderr)
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sys.exit(1)
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def get_container_ip(container_name):
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for _ in range(15):
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try:
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result = run_command(f"lxc list {container_name} --format json", "Frage Container-IP ab", ignore_errors=True)
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if result and result.returncode == 0:
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data = json.loads(result.stdout)
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if data and data[0]["state"] and data[0]["state"]["network"] and "eth0" in data[0]["state"]["network"]:
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addresses = data[0]["state"]["network"]["eth0"]["addresses"]
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for addr in addresses:
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if addr["family"] == "inet":
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return addr['address']
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except (json.JSONDecodeError, IndexError, KeyError):
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pass
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time.sleep(2)
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return None
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def main():
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parser = argparse.ArgumentParser(description="Erstellt und konfiguriert mehrere LXD-Container.")
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parser.add_argument("-c", "--count", type=int, default=1, help="Anzahl der zu erstellenden Container.")
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parser.add_argument("-b", "--basename", default="vm", help="Basisname für die Container.")
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parser.add_argument("--hostname-template", default="{basename}-{i:02d}", help="Vorlage für den Hostnamen, z.B. 'webserver-{i}'. Unterstützt {basename} und {i}.")
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parser.add_argument("-p", "--root-password", required=True, help="Root-Passwort für alle Container.")
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parser.add_argument("--port-start", type=int, default=2201, help="Start-Port für die SSH-Weiterleitung.")
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parser.add_argument("--image", default="images:archlinux", help="Zu verwendendes Image (z.B. images:archlinux, ubuntu:22.04).")
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parser.add_argument("--no-port-forward", action="store_true", help="Überspringt die Einrichtung der SSH-Port-Weiterleitung.")
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args = parser.parse_args()
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if args.count > 1 and '{i}' not in args.hostname_template:
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print("FEHLER: Bei --count > 1 muss die --hostname-template den Platzhalter '{i}' enthalten, um eindeutige Namen zu gewährleisten.", file=sys.stderr)
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sys.exit(1)
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run_command("command -v lxc >/dev/null", "Prüfe, ob LXD installiert ist")
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print("LXD ist verfügbar. WICHTIG: Es wird davon ausgegangen, dass 'lxd init' bereits ausgeführt wurde.")
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if not os.path.exists("out"):
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os.makedirs("out")
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elif not os.path.isdir("out"):
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os.remove("out")
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os.makedirs("out")
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clients = []
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for i in range(1, args.count + 1):
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vm_name = args.hostname_template.format(basename=args.basename, i=i)
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ssh_port = args.port_start + i - 1
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print(f"{ '=' * 20} ERSTELLE CONTAINER: {vm_name} {'=' * 20}")
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run_command(f"lxc delete {vm_name} --force", f"{vm_name} vorsorglich löschen", ignore_errors=True)
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run_command(f"lxc launch {args.image} {vm_name}", f"Starte {vm_name} von Image")
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wait_for_network(vm_name)
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distro_id_command = "lxc exec {} -- cat /etc/os-release | grep '^ID=' | cut -d'=' -f2"
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distro_id_result = run_command(distro_id_command.format(vm_name), f"Ermittle Distributions-ID für {vm_name}")
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distro_id = distro_id_result.stdout.strip().replace('"', '')
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install_cmd = ""
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if distro_id == "arch":
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install_cmd = "pacman -Sy --noconfirm python"
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elif distro_id in ["ubuntu", "debian"]:
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install_cmd = "sh -c 'export DEBIAN_FRONTEND=noninteractive; apt-get update && apt-get install -y python3'"
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elif distro_id == "fedora":
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install_cmd = "dnf install -y python3"
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else:
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print(f"FEHLER: Nicht unterstützte Distribution: {distro_id}", file=sys.stderr)
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sys.exit(1)
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run_command(f"lxc exec {vm_name} -- {install_cmd}", f"Installiere Python in {vm_name}")
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run_command(f"lxc file push setup_container.py {vm_name}/root/", f"Kopiere Setup-Skript nach {vm_name}")
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run_command(f"lxc exec {vm_name} -- python3 /root/setup_container.py '{args.root_password}' '{vm_name}' '{distro_id}'", f"Führe Konfiguration in {vm_name} aus")
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ssh_info = ""
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if not args.no_port_forward:
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run_command(f"lxc config device add {vm_name} ssh-proxy proxy listen=tcp:0.0.0.0:{ssh_port} connect=tcp:127.0.0.1:22", f"Richte Port-Weiterleitung für {vm_name} ein")
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ssh_info = f"SSH-Zugang: ssh root@localhost -p {ssh_port}"
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else:
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print("\n--- Überspringe Port-Weiterleitung ---")
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ip_address = get_container_ip(vm_name)
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if ip_address:
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clients.append({"name": vm_name, "ip": ip_address})
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print(f"\n>>> Container {vm_name} erfolgreich erstellt und konfiguriert! <<<")
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if ssh_info:
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print(ssh_info)
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print(f"IP-Adresse: {ip_address}")
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else:
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print(f"\nFEHLER: IP-Adresse für Container {vm_name} konnte nicht abgerufen werden.", file=sys.stderr)
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if clients:
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csv_path = "out/clients.csv"
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with open(csv_path, "w") as f:
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f.write("name,ip\n")
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for client in clients:
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f.write(f"{client['name']},{client['ip']}\n")
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print(f"\nAlle Container wurden erstellt und in {csv_path} gespeichert.")
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else:
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print("\nKeine Container wurden erstellt.")
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if __name__ == "__main__":
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main()
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