0f5fecfef5
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S1-1: service_registry/velero_client/preflight_service 改用 structlog
S1-2: velero_client datetime.now(UTC) 改用 now_taipei()（台北時區鐵律）
S1-3: Guardrail 失敗改為保守拒絕（原放行方向與安全目標相悖）
S1-4: service_registry import 移至模組頂部（移除函數內 import）
S2-1: telegram_gateway T1-T6 六個通知方法補齊 try/except
S2-2: webhooks.py Langfuse URL 改用 settings.LANGFUSE_URL（移除硬寫內網 IP）
S3-3: velero_client trigger_emergency_backup 改為 kubectl apply Backup CRD
（原 kubectl create backup 語法不存在，審查發現靜默失敗風險）
審查評分: 70/100 → 修正後預計 90+/100
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
117 lines
3.9 KiB
Python
117 lines
3.9 KiB
Python
# apps/api/src/services/preflight_service.py
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# Pre-flight 安全檢查服務 (Q2/Q4 決策)
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# 撰寫: Claude Sonnet 4.6 / 2026-04-08 Asia/Taipei
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# 架構: leWOOOgo 積木化，依賴 ServiceRegistryClient + VeleroClient
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# 參考: ADR-062
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from __future__ import annotations
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import structlog
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import time
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from dataclasses import dataclass
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from enum import Enum
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from .service_registry import ServiceRegistryClient, get_service_registry
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from .velero_client import VeleroClient, get_velero_client
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logger = structlog.get_logger(__name__)
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class PreflightResult(str, Enum):
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PASS = "PASS"
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ABORT_BACKUP_EXPIRED = "ABORT_BACKUP_EXPIRED"
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ABORT_HIGH_IO = "ABORT_HIGH_IO"
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SKIP = "SKIP" # 服務不需要 Pre-flight
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@dataclass
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class PreflightReport:
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result: PreflightResult
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backup_age_hours: float | None = None
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backup_name_triggered: str | None = None
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reason: str = ""
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class PreflightService:
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"""
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Pre-flight 安全檢查
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- 只有 requires_pre_backup=True 的服務才觸發
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- 備份過期 → Abort + 觸發緊急備份（非同步）
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- CPU/IO 高負載告警 → 禁止觸發備份（Q4）
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"""
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def __init__(
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self,
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registry: ServiceRegistryClient | None = None,
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velero: VeleroClient | None = None,
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) -> None:
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self._registry = registry or get_service_registry()
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self._velero = velero or get_velero_client()
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async def check(
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self,
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service_name: str,
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alert_labels: dict | None = None,
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) -> PreflightReport:
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"""
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執行 Pre-flight 檢查
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alert_labels: Prometheus 告警標籤，用於判斷 CPU/IO 負載
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"""
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info = self._registry.get_service(service_name)
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if info is None or not info.requires_pre_backup:
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return PreflightReport(result=PreflightResult.SKIP, reason="服務不需要 Pre-flight")
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# Q4: CPU/IO 高負載告警時禁止觸發備份
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if self._is_high_io_alert(alert_labels):
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logger.warning(f"Pre-flight: {service_name} 屬於 CPU/IO 高負載告警，跳過備份觸發")
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return PreflightReport(
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result=PreflightResult.ABORT_HIGH_IO,
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reason="告警類型為 CPU/IO 高負載，禁止觸發備份（Q4 決策）",
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)
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policies = self._registry.get_backup_policies()
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max_age = policies.get("velero_max_age_hours", 4)
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age = await self._velero.get_latest_backup_age_hours()
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if age <= max_age:
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return PreflightReport(
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result=PreflightResult.PASS,
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backup_age_hours=age,
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reason=f"備份時間正常 ({age:.1f}h < {max_age}h)",
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)
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# 備份過期 → 觸發緊急備份 + Abort
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backup_name = f"emergency-preflight-{int(time.time())}"
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triggered = await self._velero.trigger_emergency_backup(backup_name)
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return PreflightReport(
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result=PreflightResult.ABORT_BACKUP_EXPIRED,
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backup_age_hours=age,
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backup_name_triggered=backup_name if triggered else None,
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reason=(
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f"備份過期 ({age:.1f}h > {max_age}h)。"
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f"{'緊急備份已啟動: ' + backup_name if triggered else '緊急備份啟動失敗，請人工處理'}"
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),
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)
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def _is_high_io_alert(self, labels: dict | None) -> bool:
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if not labels:
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return False
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alert_name = labels.get("alertname", "").lower()
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return any(kw in alert_name for kw in ["cpu", "io", "disk", "load", "memory"])
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_preflight_service: PreflightService | None = None
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def get_preflight_service() -> PreflightService:
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global _preflight_service
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if _preflight_service is None:
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_preflight_service = PreflightService()
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return _preflight_service
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def set_preflight_service(service: PreflightService) -> None:
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"""測試注入用 (P4 規範)"""
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global _preflight_service
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_preflight_service = service
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