37 lines
1.3 KiB
Python
37 lines
1.3 KiB
Python
from aiohttp import web
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from prometheus_client import Counter, generate_latest as prom_generate_latest
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from lbry.wallet.server import util
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NAMESPACE = "wallet_server"
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REQUESTS_COUNT = Counter("requests_count", "Number of requests received", namespace=NAMESPACE)
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class PrometheusServer:
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def __init__(self):
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self.logger = util.class_logger(__name__, self.__class__.__name__)
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self.runner = None
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async def start(self, port: int):
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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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self.runner = web.AppRunner(prom_app)
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await self.runner.setup()
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metrics_site = web.TCPSite(self.runner, "0.0.0.0", port, shutdown_timeout=.5)
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await metrics_site.start()
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self.logger.info('metrics server listening on %s:%i', *metrics_site._server.sockets[0].getsockname()[:2])
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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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self.logger.exception('could not generate prometheus data')
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raise
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async def stop(self):
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await self.runner.cleanup()
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