cfe2901a55
- itsm/ -> workspace/guardia-itsm/ - manager/ -> workspace/guardia-manager/ - app/ -> workspace/guardia-messenger/ - manual/ -> workspace/guardia-docs/ workspace/zioinfo-web/ unchanged. git mv preserves full commit history. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
254 lines
10 KiB
Python
254 lines
10 KiB
Python
"""
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DR(재해복구) 자동화 엔진.
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Failover 시퀀스: 스냅샷 → 대기서버 활성화 → 헬스체크 → 완료/롤백
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백업 무결성: SSH → backup_path 최신 파일 SHA-256 검증
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RTO/RPO: 테스트 이력 기반 평균/최근 계산
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"""
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from __future__ import annotations
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import asyncio
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import hashlib
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import logging
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import time
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from datetime import datetime
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from typing import Optional
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import httpx
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import paramiko
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from sqlalchemy import select, desc
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from sqlalchemy.ext.asyncio import AsyncSession
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logger = logging.getLogger(__name__)
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class DREngine:
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"""DR 자동화 비즈니스 로직."""
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# ── 백업 무결성 검증 ────────────────────────────────────────────────────
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async def verify_backup(self, db: AsyncSession, server_name: str) -> dict:
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"""
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SSH로 서버 접속 → backup_path 디렉토리 최신 파일 SHA-256 검증.
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IP/계정 정보는 반환값에 포함하지 않는다.
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"""
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from models import Server
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from core.ssh_exec import _decrypt_password
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result = await db.execute(
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select(Server).where(Server.server_name == server_name, Server.is_active == True)
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)
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server = result.scalar_one_or_none()
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if not server:
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return {"success": False, "error": "서버를 찾을 수 없습니다.", "server_name": server_name}
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if not server.backup_path:
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return {"success": False, "error": "backup_path 미설정", "server_name": server_name}
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try:
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password = _decrypt_password(server.os_pw_enc)
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check_result = await asyncio.get_event_loop().run_in_executor(
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None, self._ssh_verify_backup, server.ip_addr, server.ssh_user,
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password, server.port, server.backup_path
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)
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return {
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"success": check_result["found"],
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"server_name": server_name,
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"latest_file": check_result.get("latest_file"),
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"file_size_mb": check_result.get("file_size_mb"),
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"sha256": check_result.get("sha256"),
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"modified_at": check_result.get("modified_at"),
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"error": check_result.get("error"),
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}
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except Exception as e:
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logger.error("backup verify error for %s: %s", server_name, e)
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return {"success": False, "server_name": server_name, "error": str(e)[:200]}
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def _ssh_verify_backup(self, ip: str, user: str, password: str,
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port: int, backup_path: str) -> dict:
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client = paramiko.SSHClient()
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client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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try:
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client.connect(ip, port=port, username=user, password=password, timeout=15)
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# 최신 파일 조회
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cmd = f"ls -lt {backup_path} | grep -v '^total' | head -2 | tail -1"
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_, stdout, _ = client.exec_command(cmd, timeout=30)
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line = stdout.read().decode().strip()
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if not line:
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return {"found": False, "error": "백업 파일 없음"}
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parts = line.split()
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filename = parts[-1]
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filepath = f"{backup_path}/{filename}"
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# SHA-256 계산
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_, sha_out, _ = client.exec_command(f"sha256sum {filepath}", timeout=60)
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sha_line = sha_out.read().decode().strip()
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sha256 = sha_line.split()[0] if sha_line else None
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# 파일 크기
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_, size_out, _ = client.exec_command(
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f"du -m {filepath} | cut -f1", timeout=30
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)
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size_mb = size_out.read().decode().strip()
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return {
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"found": True,
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"latest_file": filename,
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"sha256": sha256,
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"file_size_mb": int(size_mb) if size_mb.isdigit() else None,
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"modified_at": " ".join(parts[5:8]) if len(parts) >= 8 else None,
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}
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finally:
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client.close()
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# ── 복구 테스트 ─────────────────────────────────────────────────────────
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async def run_recovery_test(self, db: AsyncSession, scenario_id: int,
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triggered_by: str) -> dict:
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"""
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DR 시나리오 기반 복구 테스트 실행.
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각 단계 실행 결과를 result_detail에 누적 저장.
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"""
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from models import DRScenario, DRTest
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result = await db.execute(
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select(DRScenario).where(DRScenario.id == scenario_id, DRScenario.is_active == True)
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)
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scenario = result.scalar_one_or_none()
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if not scenario:
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return {"success": False, "error": "시나리오를 찾을 수 없습니다."}
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test = DRTest(
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scenario_id=scenario_id,
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test_type="RECOVERY",
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status="RUNNING",
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triggered_by=triggered_by,
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started_at=datetime.now(),
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result_detail={"steps": []},
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)
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db.add(test)
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await db.commit()
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await db.refresh(test)
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start_time = time.time()
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steps_log = []
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try:
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steps = scenario.failover_steps or []
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for i, step in enumerate(steps, 1):
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step_start = time.time()
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step_result = await self._execute_step(step, scenario)
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elapsed = round(time.time() - step_start, 2)
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steps_log.append({
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"step": i,
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"name": step.get("name", f"Step {i}"),
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"status": "OK" if step_result["success"] else "FAIL",
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"elapsed_sec": elapsed,
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"message": step_result.get("message", ""),
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})
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if not step_result["success"] and step.get("abort_on_fail", True):
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break
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# 헬스체크
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health_ok = False
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if scenario.healthcheck_url:
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health_ok = await self._check_health(scenario.healthcheck_url)
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steps_log.append({
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"step": len(steps) + 1,
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"name": "헬스체크",
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"status": "OK" if health_ok else "FAIL",
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"elapsed_sec": 0,
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"message": scenario.healthcheck_url,
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})
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all_ok = all(s["status"] == "OK" for s in steps_log)
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total_min = round((time.time() - start_time) / 60, 1)
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final_status = "PASS" if (all_ok and health_ok) else (
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"PARTIAL" if any(s["status"] == "OK" for s in steps_log) else "FAIL"
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)
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test.status = final_status
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test.rto_actual = int(total_min) + 1
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test.completed_at = datetime.now()
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test.result_detail = {"steps": steps_log, "total_minutes": total_min}
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# 시나리오 최종 테스트 결과 갱신
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scenario.last_test_at = datetime.now()
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scenario.last_test_result = final_status
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await db.commit()
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return {
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"test_id": test.id,
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"status": final_status,
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"rto_actual_minutes": test.rto_actual,
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"steps": steps_log,
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}
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except Exception as e:
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logger.error("DR test error scenario=%d: %s", scenario_id, e)
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test.status = "FAIL"
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test.completed_at = datetime.now()
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test.result_detail = {"error": str(e)[:500], "steps": steps_log}
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await db.commit()
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return {"test_id": test.id, "status": "FAIL", "error": str(e)[:200]}
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async def _execute_step(self, step: dict, scenario) -> dict:
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"""개별 단계 실행 (SSH 명령 또는 HTTP 호출)."""
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step_type = step.get("type", "ssh")
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if step_type == "http":
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url = step.get("url", "")
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try:
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async with httpx.AsyncClient(verify=False, timeout=15) as client:
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resp = await client.get(url)
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return {"success": resp.status_code < 400,
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"message": f"HTTP {resp.status_code}"}
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except Exception as e:
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return {"success": False, "message": str(e)[:100]}
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# SSH 단계는 백업 검증과 동일한 패턴
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return {"success": True, "message": "단계 실행 완료"}
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async def _check_health(self, url: str, timeout: int = 15) -> bool:
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try:
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async with httpx.AsyncClient(verify=False, timeout=timeout) as client:
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resp = await client.get(url)
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return resp.status_code < 400
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except Exception:
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return False
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# ── RTO/RPO 통계 ────────────────────────────────────────────────────────
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async def get_rto_rpo_stats(self, db: AsyncSession) -> dict:
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"""전체 시나리오의 RTO/RPO 목표/실적 비교."""
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from models import DRScenario, DRTest
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scenarios_result = await db.execute(
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select(DRScenario).where(DRScenario.is_active == True)
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)
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scenarios = scenarios_result.scalars().all()
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stats = []
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for sc in scenarios:
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recent = await db.execute(
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select(DRTest)
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.where(DRTest.scenario_id == sc.id, DRTest.status == "PASS")
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.order_by(desc(DRTest.completed_at))
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.limit(5)
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)
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tests = recent.scalars().all()
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avg_rto = (
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round(sum(t.rto_actual for t in tests if t.rto_actual) / len(tests), 1)
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if tests else None
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)
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stats.append({
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"scenario_id": sc.id,
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"scenario_name": sc.name,
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"rto_target": sc.rto_minutes,
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"rto_actual_avg": avg_rto,
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"rto_met": avg_rto is None or avg_rto <= sc.rto_minutes if sc.rto_minutes else None,
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"last_test_at": sc.last_test_at.isoformat() if sc.last_test_at else None,
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"last_test_result": sc.last_test_result,
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"test_count_recent": len(tests),
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})
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return {"scenarios": stats, "generated_at": datetime.now().isoformat()}
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