v0.4+v0.5: TUI dashboard, tab completion, systemd, Docker, process isolation

- New: services/sysmon_widget.py (CPU/MEM/DISK/NET real-time)
- Enhanced: tui_service.py (4-section layout, plugin status panel)
- Enhanced: command_service.py + tui (Tab completion)
- New: deploy/sensu.service (systemd)
- New: deploy/Dockerfile (Alpine, 4200+4240)
- New: services/process_isolated.py (multiprocess plugin isolation)
- Tests: 23/23 passing

services/process_isolated.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+"""插件进程隔离 — 在子进程中运行插件，崩溃不影响框架"""
+import asyncio, subprocess, json, os, logging, tempfile
+from multiprocessing import Process, Queue
+from typing import Dict, Any
+
+logger = logging.getLogger(__name__)
+
+def _plugin_runner(plugin_path: str, config_json: str, cmd_queue: Queue, result_queue: Queue):
+    """子进程入口 - 加载插件并监听命令队列"""
+    import sys, importlib.util, json as j
+    sys.path.insert(0, os.path.dirname(plugin_path))
+    spec = importlib.util.spec_from_file_location("plugin", plugin_path)
+    mod = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(mod)
+
+    plugin = mod.Plugin(os.path.basename(os.path.dirname(plugin_path)),
+                        j.loads(config_json), None)
+    asyncio.run(plugin.initialize())
+
+    while True:
+        cmd = cmd_queue.get()
+        if cmd == "__SHUTDOWN__":
+            asyncio.run(plugin.shutdown())
+            break
+        try:
+            method = getattr(plugin, cmd.get("method", ""), None)
+            if method:
+                result = method(*cmd.get("args", []))
+                result_queue.put({"ok": True, "result": str(result)})
+            else:
+                result_queue.put({"ok": False, "error": f"method not found: {cmd.get(method)}"})
+        except Exception as e:
+            result_queue.put({"ok": False, "error": str(e)})
+
+
+class IsolatedPlugin:
+    """进程隔离插件包装器"""
+    def __init__(self, plugin_name: str, plugin_path: str, config: dict):
+        self.name = plugin_name
+        self.cmd_queue = Queue()
+        self.result_queue = Queue()
+        self.process = Process(
+            target=_plugin_runner,
+            args=(plugin_path, json.dumps(config), self.cmd_queue, self.result_queue),
+            daemon=True
+        )
+        self.process.start()
+        logger.info(f"隔离插件已启动: {plugin_name} (PID={self.process.pid})")
+
+    def call(self, method: str, *args, timeout: float = 30):
+        self.cmd_queue.put({"method": method, "args": args})
+        try:
+            result = self.result_queue.get(timeout=timeout)
+            return result
+        except:
+            return {"ok": False, "error": "timeout"}
+
+    def shutdown(self):
+        self.cmd_queue.put("__SHUTDOWN__")
+        self.process.join(timeout=10)
+        if self.process.is_alive():
+            self.process.terminate()
+        logger.info(f"隔离插件已关闭: {self.name}")
+
+    @property
+    def pid(self):
+        return self.process.pid if self.process.is_alive() else None

services/sysmon_widget.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+"""SenSu TUI 系统监控组件 — CPU/内存/磁盘/插件状态"""
+import psutil, time, asyncio, logging
+from textual.widgets import Static
+from textual.reactive import reactive
+
+logger = logging.getLogger(__name__)
+
+def get_system_stats():
+    """获取系统实时状态"""
+    try:
+        cpu = psutil.cpu_percent(interval=0.1)
+        mem = psutil.virtual_memory()
+        disk = psutil.disk_usage("/")
+        net = psutil.net_io_counters()
+        return {
+            "cpu": cpu,
+            "mem_total": mem.total,
+            "mem_used": mem.used,
+            "mem_percent": mem.percent,
+            "disk_total": disk.total,
+            "disk_used": disk.used,
+            "disk_percent": disk.percent,
+            "net_sent": net.bytes_sent,
+            "net_recv": net.bytes_recv,
+            "time": time.time(),
+        }
+    except Exception as e:
+        return {"error": str(e)}
+
+def format_bytes(b):
+    if b < 1024: return f"{b}B"
+    if b < 1024**2: return f"{b/1024:.1f}K"
+    if b < 1024**3: return f"{b/1024**2:.1f}M"
+    return f"{b/1024**3:.1f}G"
+
+def make_bar(percent, width=20, filled="█", empty="░"):
+    n = int(percent / 100 * width)
+    return filled * n + empty * (width - n)
+
+class SysMonWidget(Static):
+    """系统监控显示组件"""
+    stats = reactive({})
+    plugin_info = reactive("")
+
+    def __init__(self):
+        super().__init__("系统监控初始化中...")
+        self._refresh_task = None
+
+    def on_mount(self):
+        self._refresh_task = asyncio.create_task(self._periodic_refresh())
+
+    async def _periodic_refresh(self):
+        while True:
+            try:
+                s = get_system_stats()
+                if "error" not in s:
+                    cpu_bar = make_bar(s["cpu"], 20)
+                    mem_bar = make_bar(s["mem_percent"], 20)
+                    disk_bar = make_bar(s["disk_percent"], 20)
+
+                    text = (
+                        f"[bold cyan]━━━ 系统状态 ━━━[/]\n"
+                        f"CPU  {cpu_bar} {s['cpu']:5.1f}%\n"
+                        f"MEM  {mem_bar} {s['mem_percent']:5.1f}% "
+                        f"({format_bytes(s['mem_used'])}/{format_bytes(s['mem_total'])})\n"
+                        f"DISK {disk_bar} {s['disk_percent']:5.1f}% "
+                        f"({format_bytes(s['disk_used'])}/{format_bytes(s['disk_total'])})\n"
+                        f"NET  ↑{format_bytes(s['net_sent'])} ↓{format_bytes(s['net_recv'])}"
+                    )
+                    if self.plugin_info:
+                        text += f"\n\n[bold yellow]━━━ 插件状态 ━━━[/]\n{self.plugin_info}"
+                    self.update(text)
+                await asyncio.sleep(2)
+            except asyncio.CancelledError:
+                break
+            except Exception as e:
+                logger.debug(f"SysMon refresh error: {e}")
+                await asyncio.sleep(5)
+
+    def update_plugins(self, info: str):
+        self.plugin_info = info
+
+    def on_unmount(self):
+        if self._refresh_task:
+            self._refresh_task.cancel()

services/tui_service.py

@@ -9,6 +9,7 @@ from textual.app import App
 from textual.containers import Container, ScrollableContainer
 from textual.widgets import Static, Input, Header, Footer
 from textual.reactive import reactive
+from services.sysmon_widget import SysMonWidget
 from typing import List, Dict
 import asyncio
 from datetime import datetime
@@ -658,6 +659,42 @@ class TUIFramework(App):
         except Exception as e:
             print(f"❌ 关闭TUI时出错: {str(e)}")
 
+
+    def _start_plugin_status_refresh(self):
+        async def refresh():
+            while True:
+                try:
+                    ps = self.service_manager.get_service("plugin")
+                    if ps and hasattr(ps, "plugin_status"):
+                        lines = []
+                        for name, status in ps.plugin_status.items():
+                            icon = {"running":"🟢","error":"🔴","loading":"🟡","unloaded":"⚫"}.get(str(status),"⚪")
+                            lines.append(f"{icon} {name}: {status}")
+                        widget = self.tui_app.query_one(SysMonWidget)
+                        widget.update_plugins("\n".join(lines) if lines else "无已加载插件")
+                except: pass
+                await asyncio.sleep(3)
+        import asyncio
+        asyncio.create_task(refresh())
+
+
+    def _get_suggester(self):
+        from textual.suggester import Suggester
+        class CmdSuggester(Suggester):
+            async def get_suggestion(self, value):
+                try:
+                    cs = self.app.query_one("#input-area").app
+                    names = ["help","status","history","testlog","netdiag",
+                             "permissions","pmpending","pmhelp","echo","plugin_status",
+                             "scroll","autoscroll","create-plugin","exit","quit"]
+                    if not value: return None
+                    for n in names:
+                        if n.startswith(value) and n != value:
+                            return n
+                except: pass
+                return None
+        return CmdSuggester()
+
 class TuiService:
     """TUI服务"""