108 lines
4.7 KiB
Python
108 lines
4.7 KiB
Python
import asyncio
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import argparse
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import logging
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import csv
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from io import StringIO
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from typing import Optional
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from aiohttp import web
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from prometheus_client import generate_latest as prom_generate_latest, Gauge
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from lbry.dht.constants import generate_id
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from lbry.dht.node import Node
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from lbry.dht.peer import PeerManager
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from lbry.extras.daemon.storage import SQLiteStorage
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from lbry.conf import Config
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logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)-4s %(name)s:%(lineno)d: %(message)s")
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log = logging.getLogger(__name__)
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BLOBS_STORED = Gauge(
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"blobs_stored", "Number of blob info received", namespace="dht_node",
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labelnames=("method",)
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)
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PEERS = Gauge(
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"known_peers", "Number of peers on routing table", namespace="dht_node",
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labelnames=("method",)
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)
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class SimpleMetrics:
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def __init__(self, port, node):
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self.prometheus_port = port
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self.dht_node: Node = node
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async def handle_metrics_get_request(self, request: web.Request):
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try:
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return web.Response(
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text=prom_generate_latest().decode(),
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content_type='text/plain; version=0.0.4'
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)
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except Exception:
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log.exception('could not generate prometheus data')
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raise
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async def handle_peers_csv(self, request: web.Request):
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out = StringIO()
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writer = csv.DictWriter(out, fieldnames=["ip", "port", "dht_id"])
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writer.writeheader()
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for peer in self.dht_node.protocol.routing_table.get_peers():
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writer.writerow({"ip": peer.address, "port": peer.udp_port, "dht_id": peer.node_id.hex()})
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return web.Response(text=out.getvalue(), content_type='text/csv')
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async def handle_blobs_csv(self, request: web.Request):
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out = StringIO()
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writer = csv.DictWriter(out, fieldnames=["blob_hash"])
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writer.writeheader()
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for blob in self.dht_node.protocol.data_store.keys():
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writer.writerow({"blob_hash": blob.hex()})
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return web.Response(text=out.getvalue(), content_type='text/csv')
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async def start(self):
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prom_app = web.Application()
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prom_app.router.add_get('/metrics', self.handle_metrics_get_request)
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prom_app.router.add_get('/peers.csv', self.handle_peers_csv)
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prom_app.router.add_get('/blobs.csv', self.handle_blobs_csv)
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metrics_runner = web.AppRunner(prom_app)
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await metrics_runner.setup()
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prom_site = web.TCPSite(metrics_runner, "0.0.0.0", self.prometheus_port)
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await prom_site.start()
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async def main(host: str, port: int, db_file_path: str, bootstrap_node: Optional[str], prometheus_port: int):
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loop = asyncio.get_event_loop()
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conf = Config()
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storage = SQLiteStorage(conf, db_file_path, loop, loop.time)
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if bootstrap_node:
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nodes = bootstrap_node.split(':')
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nodes = [(nodes[0], int(nodes[1]))]
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else:
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nodes = conf.known_dht_nodes
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await storage.open()
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node = Node(
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loop, PeerManager(loop), generate_id(), port, port, 3333, None,
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storage=storage
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)
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if prometheus_port > 0:
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metrics = SimpleMetrics(prometheus_port, node)
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await metrics.start()
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node.start(host, nodes)
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while True:
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await asyncio.sleep(10)
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PEERS.labels('main').set(len(node.protocol.routing_table.get_peers()))
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BLOBS_STORED.labels('main').set(len(node.protocol.data_store.get_storing_contacts()))
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log.info("Known peers: %d. Storing contact information for %d blobs from %d peers.",
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len(node.protocol.routing_table.get_peers()), len(node.protocol.data_store),
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len(node.protocol.data_store.get_storing_contacts()))
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(
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description="Starts a single DHT node, which then can be used as a seed node or just a contributing node.")
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parser.add_argument("--host", default='0.0.0.0', type=str, help="Host to listen for requests. Default: 0.0.0.0")
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parser.add_argument("--port", default=4444, type=int, help="Port to listen for requests. Default: 4444")
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parser.add_argument("--db_file", default='/tmp/dht.db', type=str, help="DB file to save peers. Default: /tmp/dht.db")
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parser.add_argument("--bootstrap_node", default=None, type=str,
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help="Node to connect for bootstraping this node. Leave unset to use the default ones. "
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"Format: host:port Example: lbrynet1.lbry.com:4444")
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parser.add_argument("--metrics_port", default=0, type=int, help="Port for Prometheus and raw CSV metrics. 0 to disable. Default: 0")
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args = parser.parse_args()
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asyncio.run(main(args.host, args.port, args.db_file, args.bootstrap_node, args.metrics_port))
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