feat(admin): backend dashboard pour #71
- backend/admin.py : module FastAPI avec 4 endpoints admin-gated - GET /api/admin/stats (CPU/RAM/Disk/Uptime via psutil) - GET /api/admin/audit (filtres user/action/limit/offset) - GET /api/admin/backup-stats (count + size + age par vault) - GET /api/admin/stream (Server-Sent Events 5s) - backend/main.py : routeur monté + middleware gzip bypass pour SSE - backend/requirements.txt : ajout psutil>=5.9 - tests/test_admin.py : 13 tests (auth + filtres + format SSE), 100% verts Pas de frontend dans cette PR — page admin.html + admin.js restent à faire.
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# backend/admin.py
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# Admin Dashboard endpoints — system stats, audit logs, backup stats,
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# and Server-Sent Events stream for real-time widgets.
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#
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# All endpoints protected with require_admin.
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import asyncio
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import json
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import logging
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import os
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import shutil
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import time
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from datetime import datetime, timezone
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from pathlib import Path
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from typing import Any
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from fastapi import APIRouter, Depends, Query
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from fastapi.responses import StreamingResponse
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from backend.audit import AUDIT_LOG_FILE, get_recent_entries
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from backend.auth.middleware import require_admin
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from backend.indexer import get_vault_data, index
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logger = logging.getLogger("obsigate.admin")
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router = APIRouter(prefix="/api/admin", tags=["admin"])
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# Server start time — set at module import. Approximates uptime even
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# if used before lifespan startup fully runs.
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_SERVER_START_TIME = time.time()
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def _server_uptime_seconds() -> float:
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return time.time() - _SERVER_START_TIME
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def _format_timestamp_for_stream(payload: dict) -> str:
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"""Serialize a payload as an SSE-compatible data line."""
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return json.dumps(payload, default=str, ensure_ascii=False)
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def _get_disk_stats() -> tuple[float, float]:
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"""Return (used_gb, total_gb) for the data volume or cwd fallback."""
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# Prefer /data mount when present (production), else use cwd
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target = "/data" if os.path.isdir("/data") else "."
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try:
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usage = shutil.disk_usage(target)
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used_gb = round(usage.used / (1024 ** 3), 2)
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total_gb = round(usage.total / (1024 ** 3), 2)
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return used_gb, total_gb
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except OSError as e:
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logger.warning(f"disk_usage failed for {target}: {e}")
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return 0.0, 0.0
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def _count_active_sessions() -> int:
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"""Count currently-revoked-free active sessions.
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Best-effort estimate: we don't keep an in-memory session store, so we
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fall back to 1 if the server is up. Useful for the dashboard tile.
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"""
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return 1
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# ── /api/admin/stats ────────────────────────────────────────────────────
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@router.get("/stats")
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async def get_admin_stats(_admin=Depends(require_admin)):
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"""Return real-time system stats for the admin dashboard."""
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import psutil
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try:
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cpu_pct = psutil.cpu_percent(interval=None)
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except Exception:
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cpu_pct = 0.0
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try:
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vm = psutil.virtual_memory()
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mem_used_mb = round(vm.used / (1024 ** 2), 1)
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mem_total_mb = round(vm.total / (1024 ** 2), 1)
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except Exception:
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mem_used_mb, mem_total_mb = 0.0, 0.0
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disk_used_gb, disk_total_gb = _get_disk_stats()
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uptime_seconds = int(_server_uptime_seconds())
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active_sessions = _count_active_sessions()
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return {
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"cpu_pct": cpu_pct,
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"mem_used_mb": mem_used_mb,
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"mem_total_mb": mem_total_mb,
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"disk_used_gb": disk_used_gb,
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"disk_total_gb": disk_total_gb,
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"uptime_seconds": uptime_seconds,
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"active_sessions": active_sessions,
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}
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# ── /api/admin/audit ───────────────────────────────────────────────────
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@router.get("/audit")
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async def get_admin_audit(
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user: str | None = Query(None, description="Filter by username (substring)"),
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action: str | None = Query(None, description="Filter by exact action"),
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limit: int = Query(500, ge=1, le=2000, description="Max entries"),
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offset: int = Query(0, ge=0, description="Skip first N entries"),
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_admin=Depends(require_admin),
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):
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"""Return recent audit log entries with optional filters."""
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entries = get_recent_entries(limit=offset + limit, action=action)
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if user:
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needle = user.lower()
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entries = [e for e in entries if needle in str(e.get("username", "")).lower()]
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if offset:
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entries = entries[offset:]
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return {
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"entries": entries,
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"total": len(entries),
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"log_file": str(AUDIT_LOG_FILE),
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}
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# ── /api/admin/backup-stats ───────────────────────────────────────────
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def _scan_backups() -> list[dict]:
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"""Walk every vault's backup directory and return one row per .bak file."""
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rows: list[dict] = []
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for vault_name in list(index.keys()):
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vd = get_vault_data(vault_name)
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if not vd:
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continue
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vault_root = Path(vd["path"])
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backup_root = Path(os.environ.get("OBSIGATE_BACKUP_DIR", ".obsigate-backup"))
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if not backup_root.is_absolute():
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backup_root = vault_root / backup_root
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vault_backup_dir = backup_root / vault_name
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if not vault_backup_dir.exists():
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continue
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try:
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for fpath in vault_backup_dir.rglob("*.bak"):
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if not fpath.is_file():
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continue
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try:
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st = fpath.stat()
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except OSError:
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continue
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# Backup filename: {orig}.{timestamp}.bak — split from the right
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name = fpath.name
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parts = name.rsplit(".", 2)
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if len(parts) < 3 or not parts[-2].isdigit():
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continue
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try:
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ts = int(parts[-2])
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except ValueError:
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continue
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rows.append({
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"vault": vault_name,
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"filename": name,
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"timestamp": ts,
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"size": st.st_size,
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})
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except OSError as e:
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logger.warning(f"Backup scan error in {vault_backup_dir}: {e}")
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rows.sort(key=lambda r: r["timestamp"], reverse=True)
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return rows
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@router.get("/backup-stats")
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async def get_admin_backup_stats(_admin=Depends(require_admin)):
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"""Return backup statistics across all vaults."""
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rows = _scan_backups()
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now_ts = int(time.time())
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total_size_mb = round(sum(r["size"] for r in rows) / (1024 ** 2), 2)
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by_vault: dict[str, dict[str, Any]] = {}
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for r in rows:
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bucket = by_vault.setdefault(r["vault"], {"count": 0, "size_mb": 0.0})
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bucket["count"] += 1
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bucket["size_mb"] = round(bucket["size_mb"] + r["size"] / (1024 ** 2), 2)
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if rows:
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newest_ts = rows[0]["timestamp"]
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oldest_ts = rows[-1]["timestamp"]
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newest_age_days = round((now_ts - newest_ts) / 86400, 2)
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oldest_age_days = round((now_ts - oldest_ts) / 86400, 2)
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else:
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newest_age_days = 0.0
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oldest_age_days = 0.0
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return {
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"total_backups": len(rows),
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"total_size_mb": total_size_mb,
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"oldest_age_days": oldest_age_days,
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"newest_age_days": newest_age_days,
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"by_vault": by_vault,
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}
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# ── /api/admin/stream — Server-Sent Events ─────────────────────────────
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async def _stats_event_generator():
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"""Yield an SSE `stats` event with the current system stats."""
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try:
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import psutil
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# Prime cpu_percent so the first real measurement isn't 0.0
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psutil.cpu_percent(interval=None)
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except Exception:
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pass
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last_keepalive = time.time()
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KEEPALIVE_INTERVAL = 15.0
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STATS_INTERVAL = 5.0
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try:
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while True:
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now = time.time()
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try:
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data = await asyncio.to_thread(_build_stats_payload)
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except Exception as e:
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logger.warning(f"SSE stats build failed: {e}")
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data = {"error": str(e)}
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yield f"event: stats\ndata: {_format_timestamp_for_stream(data)}\n\n"
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if now - last_keepalive >= KEEPALIVE_INTERVAL:
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last_keepalive = now
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yield ": keepalive\n\n"
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await asyncio.sleep(STATS_INTERVAL)
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except asyncio.CancelledError:
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logger.info("SSE stats stream cancelled")
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raise
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def _build_stats_payload() -> dict:
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"""Synchronous stats builder for the SSE generator."""
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import psutil
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cpu_pct = psutil.cpu_percent(interval=None)
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vm = psutil.virtual_memory()
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disk_used_gb, disk_total_gb = _get_disk_stats()
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return {
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"cpu_pct": cpu_pct,
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"mem_used_mb": round(vm.used / (1024 ** 2), 1),
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"mem_total_mb": round(vm.total / (1024 ** 2), 1),
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"disk_used_gb": disk_used_gb,
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"disk_total_gb": disk_total_gb,
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"uptime_seconds": int(_server_uptime_seconds()),
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"timestamp": datetime.now(timezone.utc).isoformat(),
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}
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@router.get("/stream")
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async def stream_admin_stats(_admin=Depends(require_admin)):
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"""Server-Sent Events stream of system metrics, every 5 seconds."""
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return StreamingResponse(
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_stats_event_generator(),
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media_type="text/event-stream",
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headers={
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"Cache-Control": "no-cache",
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"X-Accel-Buffering": "no",
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"Connection": "keep-alive",
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},
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)
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