Monitor FastAPI Background Tasks with CronRabbit
FastAPIThe Problem
FastAPI background tasks and attached schedulers (like APScheduler or Celery) can fail without notification. Async errors may be silently swallowed.
The Solution
Add CronRabbit pings inside your background task functions using httpx or aiohttp for async compatibility.
Async Integration
Use httpx (async HTTP client) for non-blocking pings inside FastAPI's async context.
Code Examples
FastAPI with APScheduler monitoring
Pythonfrom fastapi import FastAPI
from apscheduler.schedulers.asyncio import AsyncIOScheduler
import httpx
app = FastAPI()
scheduler = AsyncIOScheduler()
PING = "https://ping.cronrabbit.com/your-id"
@scheduler.scheduled_job("cron", hour=2)
async def nightly_cleanup():
async with httpx.AsyncClient(timeout=10) as client:
await client.get(f"{PING}/start")
try:
await cleanup_expired_data()
await client.get(PING)
except Exception:
await client.get(f"{PING}/fail")
raise
@app.on_event("startup")
def start_scheduler():
scheduler.start()