Refactor: Container-Erkennung zentralisiert, SMART-Check auf LXC überspringen

Neues Modul services/platform_info.py prüft systemd-detect-virt einmalig
beim Start (statt pro Request). SMART-Abfragen werden in Containern
übersprungen, da /dev/sdX dort meist nicht verfügbar ist.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/services/platform_info.py

@@ -0,0 +1,25 @@
+"""
+Platform/Virtualization Detection
+Einmalige Prüfung via systemd-detect-virt beim Start.
+"""
+
+import subprocess
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+def _detect_virt() -> str:
+    try:
+        r = subprocess.run(["/usr/bin/systemd-detect-virt"], capture_output=True, text=True, timeout=3)
+        return r.stdout.strip()
+    except Exception:
+        return "none"
+
+
+VIRT_TYPE = _detect_virt()
+IS_CONTAINER = VIRT_TYPE not in ("none", "")
+IS_LXC = VIRT_TYPE == "lxc"
+
+if IS_CONTAINER:
+    logger.info(f"Running inside container (virt={VIRT_TYPE}) — hardware-specific checks disabled")

backend/services/system_info.py

@@ -10,6 +10,8 @@ import platform
 from typing import Dict, Any, Optional
 from datetime import datetime
 
+from services.platform_info import IS_CONTAINER
+
 logger = logging.getLogger(__name__)
 
 
@@ -297,16 +299,8 @@ def get_network_traffic() -> Dict[str, Any]:
         return {"error": str(e)}
 
 
-def _is_container() -> bool:
-    try:
-        r = subprocess.run(["/usr/bin/systemd-detect-virt"], capture_output=True, text=True, timeout=3)
-        return r.returncode == 0 and r.stdout.strip() not in ("none", "")
-    except Exception:
-        return False
-
-
 def get_disk_io() -> Dict[str, Any]:
-    if _is_container():
+    if IS_CONTAINER:
         return {"disks": []}
     try:
         with open("/proc/diskstats", "r") as f:

backend/services/zfs_runner.py

@@ -11,6 +11,8 @@ import re
 from typing import Dict, List, Any, Optional, Tuple
 from datetime import datetime, timedelta
 
+from services.platform_info import IS_CONTAINER
+
 logger = logging.getLogger(__name__)
 
 _TIMEOUT = 5
@@ -189,6 +191,8 @@ def scrub_pool(pool_name: str) -> Dict[str, str]:
 
 
 def get_smart_info(disk: str) -> Dict[str, Any]:
+    if IS_CONTAINER:
+        return {"available": False, "reason": "container"}
     stdout, _, rc = _run(["smartctl", "-A", "-i", "--json", f"/dev/{disk}"])
     if not stdout:
         return {}