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add optional prometheus to dht_node script

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This commit is contained in:
Victor Shyba 2021-10-22 03:39:46 -03:00
parent b62a0b4607
commit dc18c26aa4
1 changed files with 41 additions and 2 deletions
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43
scripts/dht_node.py
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@ -2,6 +2,8 @@ import asyncio
import argparse
import logging
from typing import Optional
from aiohttp import web
from prometheus_client import generate_latest as prom_generate_latest, Gauge
from lbry.dht.constants import generate_id
from lbry.dht.node import Node
@ -11,9 +13,43 @@ from lbry.conf import Config
logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)-4s %(name)s:%(lineno)d: %(message)s")
log = logging.getLogger(__name__)
BLOBS_STORED = Gauge(
"blobs_stored", "Number of blob info received", namespace="dht_node",
labelnames=("method",)
)
PEERS = Gauge(
"known_peers", "Number of peers on routing table", namespace="dht_node",
labelnames=("method",)
)
async def main(host: str, port: int, db_file_path: str, bootstrap_node: Optional[str]):
class SimpleMetrics:
def __init__(self, port):
self.prometheus_port = port
async def handle_metrics_get_request(self, request: web.Request):
try:
return web.Response(
text=prom_generate_latest().decode(),
content_type='text/plain; version=0.0.4'
)
except Exception:
log.exception('could not generate prometheus data')
raise
async def start(self):
prom_app = web.Application()
prom_app.router.add_get('/metrics', self.handle_metrics_get_request)
metrics_runner = web.AppRunner(prom_app)
await metrics_runner.setup()
prom_site = web.TCPSite(metrics_runner, "0.0.0.0", self.prometheus_port)
await prom_site.start()
async def main(host: str, port: int, db_file_path: str, bootstrap_node: Optional[str], prometheus_port: int):
if prometheus_port > 0:
metrics = SimpleMetrics(prometheus_port)
await metrics.start()
loop = asyncio.get_event_loop()
conf = Config()
storage = SQLiteStorage(conf, db_file_path, loop, loop.time)
@ -30,6 +66,8 @@ async def main(host: str, port: int, db_file_path: str, bootstrap_node: Optional
node.start(host, nodes)
while True:
await asyncio.sleep(10)
PEERS.labels('main').set(len(node.protocol.routing_table.get_peers()))
BLOBS_STORED.labels('main').set(len(node.protocol.data_store.get_storing_contacts()))
log.info("Known peers: %d. Storing contact information for %d blobs from %d peers.",
len(node.protocol.routing_table.get_peers()), len(node.protocol.data_store),
len(node.protocol.data_store.get_storing_contacts()))
@ -44,5 +82,6 @@ if __name__ == '__main__':
parser.add_argument("--bootstrap_node", default=None, type=str,
help="Node to connect for bootstraping this node. Leave unset to use the default ones. "
"Format: host:port Example: lbrynet1.lbry.com:4444")
parser.add_argument("--prometheus_port", default=0, type=int, help="Port for Prometheus metrics. 0 to disable. Default: 0")
args = parser.parse_args()
asyncio.run(main(args.host, args.port, args.db_file, args.bootstrap_node))
asyncio.run(main(args.host, args.port, args.db_file, args.bootstrap_node, args.prometheus_port))