224 lines
9.3 KiB
Python
224 lines
9.3 KiB
Python
# Copyright 2026 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import asyncio
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from datetime import datetime, timedelta, timezone
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import logging
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import uuid
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from app.config import settings
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from app.schemas.session_schema import (
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CreateSessionRequest,
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HeartbeatResponse,
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SessionListItem,
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SessionRecord,
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SessionResponse,
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SessionStatus,
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)
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from app.services.bigquery_service import bigquery_service
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from app.services.cloud_orchestrator_service import cloud_orchestrator_service
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from app.services.docker_service import docker_manager
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logger = logging.getLogger("artemis.session_manager")
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class SessionManagerService:
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"""Master orchestrator for multi-tenant Artemis session containers and Cuttlefish AVDs."""
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def __init__(self):
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self._reaper_task: asyncio.Task | None = None
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def start_background_reaper(self):
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"""Start the background watchdog task to reap expired sessions."""
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if not self._reaper_task or self._reaper_task.done():
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self._reaper_task = asyncio.create_task(self._reaper_loop())
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logger.info("[Session Manager] Background session reaper loop started.")
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async def _reaper_loop(self):
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"""Periodically scans for expired sessions and reclaims compute resources."""
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while True:
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try:
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await asyncio.sleep(settings.REAPER_CHECK_INTERVAL_SECONDS)
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now = datetime.now(timezone.utc)
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active_sessions = await bigquery_service.list_all_active_sessions()
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for s in active_sessions:
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# Check if session has exceeded expiration or missed heartbeats
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if s.expires_at < now:
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logger.info(
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f"[Session Reaper] Session {s.session_id} has expired (TTL elapsed). Tearing down..."
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)
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await self.terminate_session(
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s.session_id, user_id=s.user_id, reason="TTL expired"
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)
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elif (
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now - s.last_heartbeat_at
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).total_seconds() > settings.SESSION_HEARTBEAT_TIMEOUT_SECONDS:
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logger.info(
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f"[Session Reaper] Session {s.session_id} heartbeat timed out. Tearing down..."
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)
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await self.terminate_session(
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s.session_id, user_id=s.user_id, reason="Heartbeat timeout"
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)
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except asyncio.CancelledError:
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break
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except Exception as e:
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logger.error(f"[Session Reaper] Error in reaper loop: {e}")
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async def create_session(self, user_id: str, request: CreateSessionRequest) -> SessionResponse:
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"""Provision a new Cuttlefish emulator + Artemis container and link them via ADB."""
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session_id = str(uuid.uuid4())
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now = datetime.now(timezone.utc)
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expires_at = now + timedelta(minutes=request.ttl_minutes)
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logger.info(
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f"[Session Manager] Starting session creation for user={user_id}, session_id={session_id}..."
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)
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# Initialize record with PROVISIONING status
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record = SessionRecord(
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user_id=user_id,
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session_id=session_id,
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status=SessionStatus.PROVISIONING,
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created_at=now,
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last_heartbeat_at=now,
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expires_at=expires_at,
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)
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await bigquery_service.save_session(record)
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try:
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# 1. Start Cuttlefish AVD via Cloud Orchestrator
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cf_info = await cloud_orchestrator_service.create_cuttlefish_instance(
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session_id=session_id,
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preset=request.device_preset,
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)
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record.cuttlefish_instance_id = cf_info.instance_id
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record.cuttlefish_adb_port = cf_info.adb_port
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record.cuttlefish_webrtc_port = cf_info.webrtc_port
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# 2. Start Artemis Container via Docker Socket
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docker_info = await docker_manager.start_artemis_container(
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session_id=session_id,
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cuttlefish_host=cf_info.host,
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cuttlefish_adb_port=cf_info.adb_port,
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)
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record.artemis_container_id = docker_info["container_id"]
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record.artemis_container_name = docker_info["container_name"]
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record.artemis_internal_ip = docker_info["internal_ip"]
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record.status = SessionStatus.ACTIVE
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# 3. Save finalized state to BigQuery
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await bigquery_service.save_session(record)
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logger.info(f"[Session Manager] Session {session_id} is ACTIVE and ready.")
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return self._build_session_response(record)
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except Exception as e:
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logger.error(f"[Session Manager] Failed to create session {session_id}: {e}")
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record.status = SessionStatus.ERROR
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record.error_message = str(e)
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await bigquery_service.save_session(record)
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# Clean up partial resources
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await self._cleanup_resources(session_id)
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raise e
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async def get_session(self, session_id: str, user_id: str) -> SessionResponse | None:
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"""Fetch session information, ensuring tenant ownership."""
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record = await bigquery_service.get_session(session_id)
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if not record:
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return None
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if record.user_id != user_id:
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logger.warning(
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f"[Session Manager] Tenant mismatch: user {user_id} attempted access to session {session_id}"
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)
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return None
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return self._build_session_response(record)
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async def list_user_sessions(self, user_id: str) -> list[SessionListItem]:
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"""List all active sessions for the current user."""
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records = await bigquery_service.list_user_sessions(user_id)
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return [
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SessionListItem(
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session_id=r.session_id,
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status=r.status,
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created_at=r.created_at,
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expires_at=r.expires_at,
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artemis_container_id=r.artemis_container_id,
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)
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for r in records
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]
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async def heartbeat(self, session_id: str, user_id: str) -> HeartbeatResponse | None:
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"""Extend session TTL and record client liveness."""
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record = await bigquery_service.get_session(session_id)
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if not record or record.user_id != user_id or record.status == SessionStatus.TERMINATED:
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return None
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now = datetime.now(timezone.utc)
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record.last_heartbeat_at = now
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record.expires_at = now + timedelta(minutes=settings.SESSION_TTL_MINUTES)
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await bigquery_service.save_session(record)
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return HeartbeatResponse(
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session_id=session_id,
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status=record.status,
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last_heartbeat_at=record.last_heartbeat_at,
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expires_at=record.expires_at,
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)
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async def terminate_session(
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self, session_id: str, user_id: str | None = None, reason: str = "User requested"
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) -> bool:
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"""Gracefully terminate container, emulator, and update records."""
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record = await bigquery_service.get_session(session_id)
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if not record:
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return False
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if user_id and record.user_id != user_id:
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return False
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logger.info(f"[Session Manager] Terminating session {session_id} (Reason: {reason})...")
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record.status = SessionStatus.TERMINATING
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await bigquery_service.save_session(record)
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await self._cleanup_resources(session_id)
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record.status = SessionStatus.TERMINATED
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await bigquery_service.save_session(record)
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logger.info(f"[Session Manager] Session {session_id} successfully terminated.")
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return True
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async def _cleanup_resources(self, session_id: str):
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"""Clean up Docker container and Cloud Orchestrator instance."""
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await asyncio.gather(
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docker_manager.stop_artemis_container(session_id),
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cloud_orchestrator_service.destroy_cuttlefish_instance(session_id),
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return_exceptions=True,
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)
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def _build_session_response(self, record: SessionRecord) -> SessionResponse:
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"""Construct the client response containing the Nginx-compatible proxy URLs."""
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return SessionResponse(
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session_id=record.session_id,
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status=record.status,
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# Routes through Nginx reverse proxy
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artemis_api_url=f"/session/{record.session_id}/artemis/",
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artemis_stream_url=f"/session/{record.session_id}/artemis/api/stream/active",
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cuttlefish_webrtc_url=f"/session/{record.session_id}/cuttlefish/",
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cuttlefish_adb_endpoint=f"{settings.CUTTLEFISH_HOST_GATEWAY}:{record.cuttlefish_adb_port}",
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created_at=record.created_at,
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expires_at=record.expires_at,
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)
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session_manager = SessionManagerService()
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