Files
exo/exo/networking/manual/manual_discovery.py
2025-02-01 23:06:57 +00:00

102 lines
4.3 KiB
Python

import os
import asyncio
from typing import Dict, List, Callable, Optional
from concurrent.futures import ThreadPoolExecutor
from exo.networking.discovery import Discovery
from exo.topology.device_capabilities import DeviceCapabilities
from exo.networking.manual.network_topology_config import NetworkTopology, PeerConfig
from exo.helpers import DEBUG_DISCOVERY
from exo.networking.peer_handle import PeerHandle
class ManualDiscovery(Discovery):
def __init__(
self,
network_config_path: str,
node_id: str,
create_peer_handle: Callable[[str, str, str, DeviceCapabilities], PeerHandle],
):
self.network_config_path = network_config_path
self.node_id = node_id
self.create_peer_handle = create_peer_handle
self.listen_task = None
self.known_peers: Dict[str, PeerHandle] = {}
self._cached_peers: Dict[str, PeerConfig] = {}
self._last_modified_time: Optional[float] = None
self._file_executor = ThreadPoolExecutor(max_workers=1)
async def start(self) -> None:
self.listen_task = asyncio.create_task(self.task_find_peers_from_config())
async def stop(self) -> None:
if self.listen_task: self.listen_task.cancel()
self._file_executor.shutdown(wait=True)
async def discover_peers(self, wait_for_peers: int = 0) -> List[PeerHandle]:
if wait_for_peers > 0:
while len(self.known_peers) < wait_for_peers:
if DEBUG_DISCOVERY >= 2: print(f"Current peers: {len(self.known_peers)}/{wait_for_peers}. Waiting for more peers...")
await asyncio.sleep(0.1)
if DEBUG_DISCOVERY >= 2: print(f"Discovered peers: {[peer.id() for peer in self.known_peers.values()]}")
return list(self.known_peers.values())
async def task_find_peers_from_config(self):
if DEBUG_DISCOVERY >= 2: print("Starting task to find peers from config...")
while True:
peers_from_config = await self._get_peers()
new_known_peers = {}
for peer_id, peer_config in peers_from_config.items():
try:
if DEBUG_DISCOVERY >= 2: print(f"Checking peer {peer_id=} at {peer_config.address}:{peer_config.port}")
peer = self.known_peers.get(peer_id)
if not peer:
if DEBUG_DISCOVERY >= 2: print(f"{peer_id=} not found in known peers. Adding.")
peer = self.create_peer_handle(peer_id, f"{peer_config.address}:{peer_config.port}", "MAN", peer_config.device_capabilities)
is_healthy = await peer.health_check()
if is_healthy:
if DEBUG_DISCOVERY >= 2: print(f"{peer_id=} at {peer_config.address}:{peer_config.port} is healthy.")
new_known_peers[peer_id] = peer
elif DEBUG_DISCOVERY >= 2:
print(f"{peer_id=} at {peer_config.address}:{peer_config.port} is not healthy. Removing.")
except Exception as e:
if DEBUG_DISCOVERY >= 2: print(f"Exception occurred when attempting to add {peer_id=}: {e}")
self.known_peers = new_known_peers
await asyncio.sleep(5.0)
if DEBUG_DISCOVERY >= 2: print(f"Current known peers: {[peer.id() for peer in self.known_peers.values()]}")
async def _get_peers(self):
try:
loop = asyncio.get_running_loop()
current_mtime = await loop.run_in_executor(self._file_executor, os.path.getmtime, self.network_config_path)
if (self._cached_peers is not None and self._last_modified_time is not None and current_mtime <= self._last_modified_time):
return self._cached_peers
topology = await loop.run_in_executor(self._file_executor, NetworkTopology.from_path, self.network_config_path)
if self.node_id not in topology.peers:
raise ValueError(
f"Node ID {self.node_id} not found in network config file "
f"{self.network_config_path}. Please run with `node_id` set to "
f"one of the keys in the config file: {[k for k, _ in topology.peers]}"
)
peers_in_network = topology.peers
peers_in_network.pop(self.node_id)
self._cached_peers = peers_in_network
self._last_modified_time = current_mtime
return peers_in_network
except Exception as e:
if DEBUG_DISCOVERY >= 2:
print(f"Error when loading network config file from {self.network_config_path}. "
f"Please update the config file in order to successfully discover peers. "
f"Exception: {e}")
return self._cached_peers