556 lines
22 KiB
Python
556 lines
22 KiB
Python
"""Ollama 容災 / 自動恢復 / Gemini 帳單 Telegram 告警
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設計原則：
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- 每次 failover 觸發都通知（用戶明確指示）
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- 但用 10min Redis dedup TTL 防同樣狀態重複告警
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- 三種告警類型：failover_triggered / recovery_succeeded / gemini_quota_exceeded
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2026-04-25 P1.5 by Claude Engineer-D — Telegram Alerter for Ollama Failover
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"""
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from __future__ import annotations
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import hashlib
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import json
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import re
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from datetime import datetime, timedelta, timezone
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from typing import Any
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import structlog
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TAIPEI_TZ = timezone(timedelta(hours=8))
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DEDUP_TTL_SEC = 600 # 10 min（故障切換用）
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RECOVERY_DEDUP_TTL_SEC = 3600 # 1h — GCP 健康閃爍時 1 小時內不重複告警
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QUOTA_DEDUP_TTL_SEC = 86400 # 24h（每日 quota 告警只發一次）
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logger = structlog.get_logger(__name__)
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_TELEGRAM_BOT_URL_RE = re.compile(r"(api\.telegram\.org/bot)[^/\s]+")
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class FailoverAlerter:
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"""Ollama 容災 Telegram 告警
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2026-04-25 P1.5 by Claude Engineer-D — Telegram Alerter for Ollama Failover
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"""
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def __init__(self, redis_client=None) -> None:
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# telegram_gateway 從 singleton 取，不注入（lifespan 已確保初始化）
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self._redis = redis_client
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# 2026-04-27 Wave8-X2 by Claude — alerter dedup fail-open 修復
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# Redis 不可用時改用 in-memory dedup，避免同一事件狂發 Telegram
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# 限制：同 process 內生效；重啟後記憶清空（可接受，重啟本身就是罕見事件）
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self._memory_dedup: dict[str, float] = {}
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self._memory_dedup_max_size = 1000
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async def alert_failover(self, event: dict[str, Any]) -> None:
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"""Ollama 故障切換告警 — 10min dedup
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# 2026-05-03 ogt: ADR-110 三層容災，故障主機從 event["failed_host"] 動態讀取
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"""
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to_provider = event.get("to_provider", "unknown")
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dedup_key = f"alert:failover:{to_provider}"
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if not await self._check_dedup(dedup_key, ttl=DEDUP_TTL_SEC):
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logger.debug("failover_alert_dedup_skipped", to_provider=to_provider)
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return
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reason = event.get("reason", "unknown")
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model = event.get("model", "?")
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timestamp = event.get("timestamp", datetime.now(TAIPEI_TZ).isoformat())
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fallback_chain_str = event.get("fallback_chain_str", "?")
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# 2026-05-03 ogt: ADR-110 — 故障主機動態，不再硬編碼 111
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failed_host = event.get("failed_host", "Ollama")
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msg = (
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f"*Ollama 容災激活*\n\n"
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f"故障主機：{_escape_md(failed_host)}\n"
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f"故障狀態：{_escape_md(reason)}\n"
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f"切換目標：{_escape_md(to_provider)} \\(model: {_escape_md(model)}\\)\n"
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f"切換時間：{_escape_md(timestamp)}\n\n"
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f"Fallback 鏈：{_escape_md(fallback_chain_str)}\n\n"
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f"自動恢復服務持續監控，3 次 HEALTHY 後自動切回"
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)
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await self._send(msg)
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logger.info("failover_alert_sent", to_provider=to_provider)
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async def alert_recovery(self, event: dict[str, Any]) -> None:
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"""Ollama 自動恢復告警 — 1h dedup per host
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# 2026-05-03 ogt: ADR-110 三層容災，恢復主機從 event["recovered_host"] 動態讀取
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# 2026-05-04 ogt: dedup key 加 recovered_host + 改 1h TTL
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# 原 key 固定 "alert:recovery" → GCP-A 每 10min 閃爍就重發
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"""
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recovered_host = event.get("recovered_host", event.get("to_provider", "ollama"))
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# sanitize host → 只留 IP/hostname 部分，拿掉 http:// 前綴與 port
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safe_host = str(recovered_host).replace("http://", "").replace("/", "_").replace(":", "_")
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dedup_key = f"alert:recovery:{safe_host}"
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if not await self._check_dedup(dedup_key, ttl=RECOVERY_DEDUP_TTL_SEC):
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logger.debug("recovery_alert_dedup_skipped")
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return
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stable_count = event.get("stable_count", event.get("to", "?"))
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# 相容 auto_recovery 傳入的 {"from": ..., "to": ...} 格式
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from_provider = event.get("from_provider", event.get("from", "?"))
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to_provider = event.get("to_provider", event.get("to", "ollama"))
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recovery_time = event.get("recovery_time", datetime.now(TAIPEI_TZ).isoformat())
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msg = (
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f"*Ollama 自動恢復*\n\n"
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f"恢復主機：{_escape_md(str(recovered_host))}\n"
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f"穩定計數：連續 {stable_count} 次 HEALTHY\n"
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f"切回時間：{_escape_md(str(recovery_time))}\n"
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f"切換路徑：{_escape_md(str(from_provider))} → {_escape_md(str(to_provider))}\n\n"
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f"自動化飛輪已恢復至高效能推理模式"
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)
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await self._send(msg)
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logger.info("recovery_alert_sent", from_provider=from_provider)
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async def alert_governance(self, event_type: str, payload: dict[str, Any]) -> None:
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"""AI 治理告警（dedup 1h）
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event_type: trust_drift / knowledge_degradation / llm_hallucination / execution_blast_radius
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dedup TTL 3600s — 同類告警 1 小時內不重複發送
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2026-04-26 P2.2 by Claude
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2026-05-02 ogt + Claude Sonnet 4.6 — Bug 3 修復：dedup key 加 payload hash
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原 key 只看 event_type，不看 payload 內容，導致同 event_type 但不同影響
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的告警（例如：trust_drift 4 條→25 條漂移）全被 1h dedup 吃掉。
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2026-05-02 ogt + Claude Opus 4.7 — critic P1-3 連鎖修復
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前次只 hash 頂層 allowlist 欄位，對 slo_*_violation / governance_self_failure
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等只把 metric 放在 impact subdict 的事件失效（hash 永遠相同）。
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改 hash 整個 impact subdict — schema 強制 5 種 event type 都有 impact，
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各自的 metric 值都會反映在 hash 裡，數值變動就會繞過 dedup。
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sha256 取代 md5 避開 bandit B324 lint warning（非密碼學用途）。
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"""
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# sanitize：防 SLO 名稱（如 "slo_km_growth_rate"）含 ":" 或空格污染 key
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safe_event_type = event_type.replace(":", "_").replace(" ", "_").lower()
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# impact hash：hash payload.impact subdict（schema 強制存在；含各 event 的 metric 值）
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# default=str 容錯 datetime / Decimal / 其他非原生 JSON 型別
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impact = payload.get("impact", {}) if isinstance(payload, dict) else {}
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_payload_hash = hashlib.sha256(
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json.dumps(impact, sort_keys=True, default=str).encode()
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).hexdigest()[:8]
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dedup_key = f"alert:governance:{safe_event_type}:{_payload_hash}"
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if not await self._check_dedup(dedup_key, ttl=3600):
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logger.debug("governance_alert_dedup_skipped", event_type=event_type)
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return
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msg = format_governance_alert_card(event_type, payload)
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await self._send(msg)
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logger.info("governance_alert_sent", event_type=event_type)
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async def alert_gemini_quota_exceeded(self, event: dict[str, Any]) -> None:
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"""Gemini 每日上限觸發，降級到 188 CPU 備援 — 24h dedup（每日重置）"""
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# 2026-04-26 critic-H1 hotfix by Claude Opus 4.7 — dedup key 加日期後綴
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# 原 key 常數 + 24h TTL 會吞跨日告警（昨 22:00 觸發，今 21:30 再觸發時 dedup 還沒過期）
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# 修法：key 加 YYYY-MM-DD，每日獨立 dedup window；TTL 縮短到 8h 足夠當日內防重複
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date_str = datetime.now(TAIPEI_TZ).date().isoformat()
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dedup_key = f"alert:gemini_quota_exceeded:{date_str}"
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if not await self._check_dedup(dedup_key, ttl=QUOTA_DEDUP_TTL_SEC):
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logger.debug("quota_alert_dedup_skipped", date=date_str)
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return
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quota = event.get("quota", "?")
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current_count = event.get("current_count", "?")
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msg = (
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f"*Gemini 每日配額耗盡*\n\n"
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f"日期：{_escape_md(date_str)}\n"
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f"上限：{_escape_md(str(quota))} calls/day\n"
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f"當前用量：{_escape_md(str(current_count))}\n"
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f"降級目標：Nemotron → Claude \\(Gemini 不可用\\)\n\n"
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f"進入容災模式至明日 0:00\n"
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f"建議檢查是否有異常流量，評估是否升級 Gemini 配額"
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)
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await self._send(msg)
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logger.info("quota_alert_sent", quota=quota, current_count=current_count)
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async def alert_provider_version_changed(self, changed_providers: list[str], probed: int) -> None:
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"""AI Provider 版本變更告警 — dedup 1h/provider
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P3.2.3 by Claude Sonnet 4.6 2026-04-27
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每個 provider 獨立 dedup，避免同一版本重複告警。
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"""
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now_str = datetime.now(TAIPEI_TZ).strftime("%Y-%m-%d %H:%M")
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sent: list[str] = []
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for provider in changed_providers:
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dedup_key = f"alert:provider_version_changed:{provider}"
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if not await self._check_dedup(dedup_key, ttl=3600):
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logger.debug("provider_version_alert_dedup_skipped", provider=provider)
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continue
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sent.append(provider)
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if not sent:
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return
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providers_md = "\n".join(f"• {_escape_md(p)}" for p in sent)
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msg = (
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f"*AI Provider 版本變更偵測*\n\n"
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f"時間：{_escape_md(now_str)}\n"
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f"探測總數：{probed}\n"
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f"版本已變更：\n{providers_md}\n\n"
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f"系統已自動記錄版本歷史，請確認是否需要重新驗證推理品質"
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)
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await self._send(msg)
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logger.info("provider_version_alert_sent", sent=sent)
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# -------------------------------------------------------------------------
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# Dedup（Redis SET NX EX）
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# -------------------------------------------------------------------------
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async def _check_dedup(self, key: str, ttl: int) -> bool:
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"""
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Redis SET NX EX 防止重複告警。
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True = 第一次（應送出），False = 已送過（跳過）。
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2026-04-25 P1.5 by Claude Engineer-D — Telegram dedup 鐵律 10min/24h TTL
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2026-04-27 Wave8-X2 by Claude — dedup fail-open 修復
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原行為：Redis 不可用 → return True → 每次都發 → Telegram 轟炸
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新行為：Redis 不可用時降級到 in-memory dedup（同 process 內限流）
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Redis 恢復後自動優先走 Redis（in-memory 只在 except 分支觸發）
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"""
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# 優先嘗試 Redis
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if self._redis is not None:
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try:
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ok = await self._redis.set(f"{key}:dedup", "1", ex=ttl, nx=True)
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return bool(ok)
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except Exception as e:
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logger.warning("dedup_redis_failed_using_memory", error=str(e))
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# Redis 失敗 → 降級到 in-memory（不 fail-open）
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# In-memory fallback dedup（Redis 不可用時，或 redis_client=None 時）
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import time
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now = time.time()
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# GC：超過容量上限時清除過期 entry，防 dict 無限成長
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if len(self._memory_dedup) >= self._memory_dedup_max_size:
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self._memory_dedup = {
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k: v for k, v in self._memory_dedup.items() if now - v < ttl
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}
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last_sent = self._memory_dedup.get(key, 0.0)
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if now - last_sent < ttl:
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return False # dedup 命中，跳過
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self._memory_dedup[key] = now
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return True
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# -------------------------------------------------------------------------
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# 發送（透過 TelegramGateway singleton）
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# -------------------------------------------------------------------------
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async def _send(self, message: str) -> None:
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"""發送至 Telegram SRE_GROUP_CHAT_ID
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使用現有 TelegramGateway singleton（不另建 HTTP client），
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parse_mode=MarkdownV2 對應 MarkdownV2 escape 規則。
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alerter 失敗不阻斷主路由邏輯（exception 吞掉只 log）
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2026-04-25 P1.5 by Claude Engineer-D — 告警失敗不能阻斷主流程
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"""
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try:
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from src.core.config import get_settings
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from src.services.telegram_gateway import get_telegram_gateway
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settings = get_settings()
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chat_id = getattr(settings, "SRE_GROUP_CHAT_ID", None) or getattr(settings, "OPENCLAW_TG_CHAT_ID", None)
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if not chat_id:
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logger.warning("telegram_chat_id_missing_failover_alert")
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return
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gateway = get_telegram_gateway()
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await gateway.send_alert_notification(text=message, parse_mode="MarkdownV2")
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logger.info("telegram_failover_alert_sent", message_len=len(message))
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except Exception as e:
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# 不 raise — 告警失敗不該阻斷主流程（鐵律）
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# 2026-05-06 Codex: Telegram/httpx exception 字串可能包含 bot token URL，
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# 禁止用 logger.exception 輸出 chained traceback。
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logger.warning(
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"telegram_failover_send_failed",
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error=_sanitize_telegram_error(str(e)),
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error_type=type(e).__name__,
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)
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# -------------------------------------------------------------------------
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# MarkdownV2 escape 工具
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# -------------------------------------------------------------------------
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_MD2_SPECIAL = r"\_*[]()~`>#+-=|{}.!"
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def _escape_md(text: str) -> str:
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"""Escape MarkdownV2 特殊字元，防止 Telegram parse error。
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2026-04-25 P1.5 by Claude Engineer-D — MarkdownV2 安全逸出
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"""
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for ch in _MD2_SPECIAL:
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text = text.replace(ch, f"\\{ch}")
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return text
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def _sanitize_telegram_error(text: str) -> str:
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"""遮蔽 Telegram Bot URL 中的 token，避免例外訊息寫入 log。"""
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return _TELEGRAM_BOT_URL_RE.sub(r"\1<redacted>", text)
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def _as_dict(value: Any) -> dict[str, Any]:
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return value if isinstance(value, dict) else {}
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_EVENT_DISPLAY_NAMES = {
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"trust_drift": "信任漂移",
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"knowledge_degradation": "知識庫劣化",
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"governance_slo_data_gap": "SLO 資料缺口",
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"governance_self_failure": "治理自檢失敗",
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"llm_hallucination": "LLM 驗證失敗",
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"execution_blast_radius": "執行風險擴大",
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}
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_STATUS_BADGES = {
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"critical": "🔴 critical",
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"error": "🔴 error",
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"violation": "🔴 violation",
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"warning": "🟡 warning",
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"degraded": "🟠 degraded",
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"ok": "🟢 ok",
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}
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_IMPACT_PROFILES: dict[str, list[tuple[str, str]]] = {
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"trust_drift": [
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("drifted_count", "漂移 Playbook"),
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("total_playbooks", "總 Playbook"),
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("drift_ratio", "漂移比例"),
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("threshold", "警戒門檻"),
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("auto_deprecated_count", "自動停用"),
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],
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"knowledge_degradation": [
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("stale_count", "陳舊 KM"),
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("total_count", "總 KM"),
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("stale_ratio", "陳舊比例"),
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("threshold", "警戒門檻"),
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("stale_days", "陳舊天數"),
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],
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"governance_slo_data_gap": [
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("reason", "缺口原因"),
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("skipped_count", "略過指標"),
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("all_slo_metrics_not_emitted", "SLO 指標缺失"),
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],
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"governance_self_failure": [
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("failed_checks", "失敗檢查"),
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("total_checks", "總檢查"),
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("failure_rate", "失敗比例"),
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],
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"execution_blast_radius": [
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("affected_services", "受影響服務"),
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("blast_radius", "爆炸半徑"),
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("threshold", "警戒門檻"),
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],
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"llm_hallucination": [
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("failed", "驗證失敗"),
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("rate", "失敗比例"),
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("threshold", "警戒門檻"),
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],
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}
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def _event_display_name(event_type: str) -> str:
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if event_type in _EVENT_DISPLAY_NAMES:
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return _EVENT_DISPLAY_NAMES[event_type]
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if event_type.startswith("slo_"):
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return "SLO 違反"
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return event_type.replace("_", " ").strip().title()
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def _status_badge(status: Any) -> str:
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status_text = str(status or "warning")
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return _STATUS_BADGES.get(status_text.lower(), status_text)
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def _format_metric_value(key: str, value: Any) -> str:
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if isinstance(value, bool):
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return "是" if value else "否"
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if isinstance(value, (float, int)) and (
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key.endswith("_ratio") or key in {"threshold", "rate", "failure_rate"}
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):
|
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return f"{float(value) * 100:.1f}%"
|
||
if isinstance(value, list):
|
||
if not value:
|
||
return "0"
|
||
shown = ", ".join(str(item) for item in value[:3])
|
||
if len(value) > 3:
|
||
shown += f"…（共 {len(value)}）"
|
||
return shown
|
||
return str(value)
|
||
|
||
|
||
def _profiled_rows(event_type: str, data: dict[str, Any], *, max_rows: int = 8) -> list[str]:
|
||
if not data:
|
||
return []
|
||
|
||
used: set[str] = set()
|
||
rows: list[str] = []
|
||
for key, label in _IMPACT_PROFILES.get(event_type, []):
|
||
if key in data:
|
||
rows.append(f"{label}：{_format_metric_value(key, data[key])}")
|
||
used.add(key)
|
||
|
||
for key in sorted(data.keys()):
|
||
if len(rows) >= max_rows:
|
||
break
|
||
if key in used:
|
||
continue
|
||
rows.append(f"{key}：{_format_metric_value(key, data[key])}")
|
||
|
||
if len(data) > len(used) + max(0, max_rows - len(rows)):
|
||
rows.append("更多欄位已收斂至 AwoooP 稽核資料")
|
||
return rows[:max_rows]
|
||
|
||
|
||
def _tree_lines(rows: list[str]) -> str:
|
||
if not rows:
|
||
return ""
|
||
rendered: list[str] = []
|
||
for idx, row in enumerate(rows):
|
||
branch = "└" if idx == len(rows) - 1 else "├"
|
||
rendered.append(f"{branch} {_escape_md(str(row))}")
|
||
return "\n".join(rendered)
|
||
|
||
|
||
def _governance_summary_lines(event_type: str, impact: dict[str, Any]) -> str:
|
||
rows = _profiled_rows(event_type, impact)
|
||
return _tree_lines(rows)
|
||
|
||
|
||
def format_governance_alert_card(event_type: str, payload: dict[str, Any]) -> str:
|
||
"""格式化 AI 治理 Telegram 卡片。
|
||
|
||
2026-05-07 Codex — 保留治理 payload，僅在 Telegram 邊界層把 raw key/value
|
||
轉成可掃描卡片，避免大量純文字欄位洗版。
|
||
"""
|
||
payload = payload if isinstance(payload, dict) else {}
|
||
impact = _as_dict(payload.get("impact"))
|
||
remediation = _as_dict(payload.get("remediation"))
|
||
actionable = _as_dict(payload.get("actionable"))
|
||
status = payload.get("status", "warning")
|
||
|
||
sections: list[str] = [
|
||
f"⚠️ *AI 治理警報｜{_escape_md(_event_display_name(event_type))}*",
|
||
"──────────────────────",
|
||
f"類型：{_escape_md(event_type)}",
|
||
f"狀態：{_escape_md(_status_badge(status))}",
|
||
]
|
||
|
||
impact_lines = _governance_summary_lines(event_type, impact)
|
||
if impact_lines:
|
||
sections.extend(["", "🧭 *影響摘要*", impact_lines])
|
||
|
||
remediation_lines = _lines_from_list(remediation.get("items"))
|
||
remediation_next_action = remediation.get("next_action")
|
||
remediation_hint = remediation.get("hint")
|
||
if remediation_lines or remediation_next_action or remediation_hint:
|
||
sections.extend(["", "🛠️ *修復方向*"])
|
||
if remediation_lines:
|
||
sections.append(remediation_lines)
|
||
if remediation_next_action:
|
||
sections.append(f"▶️ 下一步：{_escape_md(str(remediation_next_action))}")
|
||
if remediation_hint:
|
||
sections.append(f"💡 提示：{_escape_md(str(remediation_hint))}")
|
||
|
||
actionable_lines = _lines_from_list(actionable.get("items"))
|
||
if actionable_lines:
|
||
sections.extend(["", "🤖 *可自動化工作*", actionable_lines])
|
||
|
||
fallback_items = _fallback_pairs(
|
||
payload,
|
||
keep={"status", "impact", "remediation", "actionable"},
|
||
max_items=4,
|
||
)
|
||
if fallback_items:
|
||
sections.extend(["", "📎 *補充欄位*", "\n".join(fallback_items)])
|
||
|
||
return "\n".join(sections)
|
||
|
||
|
||
def _lines_from_dict(data: dict[str, Any], max_items: int = 20, compact: bool = False) -> str:
|
||
if not data:
|
||
return ""
|
||
rows = []
|
||
idx = 0
|
||
for k in sorted(data.keys()) if isinstance(data, dict) else []:
|
||
if idx >= max_items:
|
||
break
|
||
rows.append(f"{_escape_md(str(k))}：{_escape_md(str(data.get(k)))}")
|
||
idx += 1
|
||
if compact and len(rows) >= max_items:
|
||
rows.append(_escape_md("...（更多欄位略）"))
|
||
return "\n".join(f" {line}" for line in rows)
|
||
|
||
|
||
def _lines_from_list(value: Any) -> str:
|
||
if not isinstance(value, list):
|
||
return ""
|
||
return "\n".join(
|
||
f" {_escape_md(str(idx + 1))}\\. {_escape_md(str(item))}"
|
||
for idx, item in enumerate(value)
|
||
)
|
||
|
||
|
||
def _fallback_pairs(
|
||
payload: dict[str, Any],
|
||
keep: set[str] | None = None,
|
||
*,
|
||
max_items: int | None = None,
|
||
) -> list[str]:
|
||
if not isinstance(payload, dict):
|
||
return []
|
||
keep = set(keep or set())
|
||
rows = []
|
||
for key in sorted(payload.keys()):
|
||
if key in keep:
|
||
continue
|
||
if max_items is not None and len(rows) >= max_items:
|
||
rows.append(_escape_md("更多欄位已收斂至 AwoooP 稽核資料"))
|
||
break
|
||
rows.append(f"{_escape_md(str(key))}：{_escape_md(str(payload.get(key)))}")
|
||
return rows
|
||
|
||
|
||
# =============================================================================
|
||
# Singleton
|
||
# =============================================================================
|
||
|
||
_alerter_instance: FailoverAlerter | None = None
|
||
|
||
|
||
def get_failover_alerter() -> FailoverAlerter:
|
||
"""取得 FailoverAlerter singleton（lifespan 中注入依賴前也可安全呼叫，僅 fail-open）
|
||
|
||
2026-04-25 P1.5 by Claude Engineer-D — Singleton 取得 alerter
|
||
"""
|
||
global _alerter_instance
|
||
if _alerter_instance is None:
|
||
_alerter_instance = FailoverAlerter()
|
||
return _alerter_instance
|
||
|
||
|
||
def configure_alerter(redis_client) -> None:
|
||
"""Lifespan 注入：redis_client 就緒後呼叫，讓 dedup 功能生效。
|
||
|
||
telegram 不另外注入，直接從 get_telegram_gateway() singleton 取得
|
||
（lifespan startup 已保證 TelegramGateway 初始化完成）。
|
||
|
||
2026-04-25 P1.5 by Claude Engineer-D — Lifespan 注入
|
||
"""
|
||
global _alerter_instance
|
||
_alerter_instance = FailoverAlerter(redis_client=redis_client)
|
||
logger.info("failover_alerter_configured")
|
||
|
||
|
||
def reset_failover_alerter() -> None:
|
||
"""重置 singleton（測試用）
|
||
|
||
2026-04-25 P1.5 by Claude Engineer-D
|
||
"""
|
||
global _alerter_instance
|
||
_alerter_instance = None
|