89 أسطر
2.3 KiB
Python
89 أسطر
2.3 KiB
Python
"""Ghaymah demo API — liveness and request metrics with no external dependencies.
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Endpoints:
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GET / basic service info
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GET /health liveness probe (process-only, no downstream checks)
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GET /metrics in-memory request counter
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"""
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import os
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import time
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from datetime import datetime, timezone
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from fastapi import FastAPI, Request
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from fastapi.responses import JSONResponse
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APP_NAME = os.getenv("APP_NAME", "ghaymah-api")
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APP_VERSION = os.getenv("APP_VERSION", "1.0.0")
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PORT = int(os.getenv("PORT", "8080"))
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# Process start time drives both uptime and the /metrics started_at field.
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STARTED_AT_MONOTONIC = time.monotonic()
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STARTED_AT_ISO = datetime.now(timezone.utc).isoformat()
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app = FastAPI(
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title=APP_NAME,
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version=APP_VERSION,
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description="Minimal API deployed on the Ghaymah container platform.",
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)
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# In-memory counter. Deliberately per-process: it resets on restart, which is
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# exactly what we want the dashboard to show after a redeploy or a crash-loop.
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_requests_total = 0
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def _now_iso() -> str:
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return datetime.now(timezone.utc).isoformat()
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def _uptime_s() -> float:
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return round(time.monotonic() - STARTED_AT_MONOTONIC, 3)
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@app.middleware("http")
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async def count_requests(request: Request, call_next):
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"""Increment the counter for every request, including failed ones."""
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global _requests_total
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_requests_total += 1
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return await call_next(request)
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@app.get("/")
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async def root():
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return {
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"service": APP_NAME,
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"version": APP_VERSION,
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"message": "Ghaymah deployment demo API",
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"endpoints": ["/", "/health", "/metrics", "/docs"],
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"started_at": STARTED_AT_ISO,
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"timestamp": _now_iso(),
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}
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@app.get("/health")
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async def health():
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"""Liveness only — no DB or network calls, so it never fails for a
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downstream reason the orchestrator cannot fix by restarting us."""
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return JSONResponse(
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status_code=200,
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content={
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"status": "ok",
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"uptime_s": _uptime_s(),
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"timestamp": _now_iso(),
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},
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)
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@app.get("/metrics")
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async def metrics():
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return {
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"requests_total": _requests_total,
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"started_at": STARTED_AT_ISO,
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}
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if __name__ == "__main__":
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import uvicorn
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uvicorn.run("main:app", host="0.0.0.0", port=PORT, log_level="info")
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