Initial commit: server-monitor v1 (Python)

Kompletter Neustart als Python-Projekt.
Portiert von zfs-monitor Bash v3, saubere Architektur:
- config.py: TOML-Config mit dataclasses
- state.py: zentrales State-Management (JSON statt Einzeldateien)
- notify.py: Telegram + Persistent Alerting als wiederverwendbare Klasse
- checks/zfs.py: ZFS Pool-Health, I/O-Fehler, Kapazität
- checks/smart.py: SATA + NVMe SMART-Monitoring
- checks/nut.py: NUT/USV-Monitoring (APC Back-UPS RS 1500G)

config.py

@@ -0,0 +1,124 @@
+from __future__ import annotations
+
+import socket
+import tomllib
+from dataclasses import dataclass, field
+from pathlib import Path
+
+
+@dataclass
+class TelegramConfig:
+    token: str
+    chat_id: str
+
+
+@dataclass
+class AlertConfig:
+    critical_repeat_runs: int = 1
+    warning_repeat_runs: int = 6
+
+
+@dataclass
+class ZFSConfig:
+    pools: list[str]
+    warn_pct: int = 85
+    crit_pct: int = 95
+    timeout: int = 10
+
+
+@dataclass
+class SmartConfig:
+    extra_disks: list[str] = field(default_factory=list)
+    reallocated_max: int = 0
+    pending_max: int = 0
+    uncorrectable_max: int = 0
+    temp_max: int = 55
+    timeout: int = 15
+
+
+@dataclass
+class NutConfig:
+    enabled: bool = False
+    ups: list[str] = field(default_factory=lambda: ["ups@localhost"])
+    batt_warn_pct: int = 50
+    batt_crit_pct: int = 20
+    load_warn_pct: int = 80
+    runtime_crit_sec: int = 300
+    timeout: int = 10
+
+
+@dataclass
+class Config:
+    telegram: TelegramConfig
+    zfs: ZFSConfig
+    smart: SmartConfig
+    nut: NutConfig
+    alert: AlertConfig
+    hostname: str = field(default_factory=socket.gethostname)
+    log_file: str = "/var/log/server-monitor/monitor.log"
+    state_file: str = "/var/lib/server-monitor/state.json"
+
+
+def load_config(path: str = "/etc/server-monitor.toml") -> Config:
+    p = Path(path)
+    if not p.exists():
+        raise FileNotFoundError(f"Config fehlt: {path}")
+
+    with open(p, "rb") as f:
+        raw = tomllib.load(f)
+
+    tg = raw.get("telegram", {})
+    if not tg.get("token") or tg["token"] in ("", "DEIN_TOKEN"):
+        raise ValueError("telegram.token nicht gesetzt")
+    if not tg.get("chat_id") or tg["chat_id"] in ("", "DEINE_CHAT_ID"):
+        raise ValueError("telegram.chat_id nicht gesetzt")
+    telegram = TelegramConfig(token=tg["token"], chat_id=str(tg["chat_id"]))
+
+    zfs_raw = raw.get("zfs", {})
+    if not zfs_raw.get("pools"):
+        raise ValueError("zfs.pools ist leer")
+    zfs = ZFSConfig(
+        pools=zfs_raw["pools"],
+        warn_pct=zfs_raw.get("warn_pct", 85),
+        crit_pct=zfs_raw.get("crit_pct", 95),
+        timeout=zfs_raw.get("timeout", 10),
+    )
+
+    sm = raw.get("smart", {})
+    smart = SmartConfig(
+        extra_disks=sm.get("extra_disks", []),
+        reallocated_max=sm.get("reallocated_max", 0),
+        pending_max=sm.get("pending_max", 0),
+        uncorrectable_max=sm.get("uncorrectable_max", 0),
+        temp_max=sm.get("temp_max", 55),
+        timeout=sm.get("timeout", 15),
+    )
+
+    nut_raw = raw.get("nut", {})
+    nut = NutConfig(
+        enabled=nut_raw.get("enabled", False),
+        ups=nut_raw.get("ups", ["ups@localhost"]),
+        batt_warn_pct=nut_raw.get("batt_warn_pct", 50),
+        batt_crit_pct=nut_raw.get("batt_crit_pct", 20),
+        load_warn_pct=nut_raw.get("load_warn_pct", 80),
+        runtime_crit_sec=nut_raw.get("runtime_crit_sec", 300),
+        timeout=nut_raw.get("timeout", 10),
+    )
+
+    alert_raw = raw.get("alert", {})
+    alert = AlertConfig(
+        critical_repeat_runs=alert_raw.get("critical_repeat_runs", 1),
+        warning_repeat_runs=alert_raw.get("warning_repeat_runs", 6),
+    )
+
+    mon = raw.get("monitoring", {})
+    return Config(
+        telegram=telegram,
+        zfs=zfs,
+        smart=smart,
+        nut=nut,
+        alert=alert,
+        hostname=mon.get("hostname") or socket.gethostname(),
+        log_file=mon.get("log_file", "/var/log/server-monitor/monitor.log"),
+        state_file=mon.get("state_file", "/var/lib/server-monitor/state.json"),
+    )