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import asyncio
import time
import httpx
import subprocess
from datetime import datetime, timedelta
from typing import Optional
from fastapi import FastAPI, Request, HTTPException
from fastapi.responses import HTMLResponse, JSONResponse, StreamingResponse
from fastapi.middleware.cors import CORSMiddleware
import uvicorn
app = FastAPI(title="Ollama Gateway + Monitor")
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_methods=["*"],
allow_headers=["*"],
)
OLLAMA_BASE = "http://127.0.0.1:11434"
# ─── Uptime tracking ──────────────────────────────────────────────────────────
start_time = time.time()
health_log: list[dict] = []
MAX_LOG = 100
async def check_ollama_health() -> bool:
try:
async with httpx.AsyncClient(timeout=5) as client:
r = await client.get(f"{OLLAMA_BASE}/api/tags")
return r.status_code == 200
except Exception:
return False
async def health_loop():
while True:
ok = await check_ollama_health()
health_log.append({"ts": time.time(), "ok": ok})
if len(health_log) > MAX_LOG:
health_log.pop(0)
await asyncio.sleep(30)
@app.on_event("startup")
async def startup():
asyncio.create_task(health_loop())
# ─── Monitoring endpoints ─────────────────────────────────────────────────────
@app.get("/health", response_class=JSONResponse)
async def health():
ollama_ok = await check_ollama_health()
uptime_sec = int(time.time() - start_time)
total = len(health_log)
good = sum(1 for h in health_log if h["ok"])
return {
"status": "ok",
"uptime_seconds": uptime_sec,
"uptime_human": str(timedelta(seconds=uptime_sec)),
"ollama": "up" if ollama_ok else "down",
"ollama_uptime_pct": round(good / total * 100, 1) if total else None,
"checks_recorded": total,
}
@app.get("/monitor", response_class=HTMLResponse)
async def monitor_dashboard():
ollama_ok = await check_ollama_health()
uptime_sec = int(time.time() - start_time)
total = len(health_log)
good = sum(1 for h in health_log if h["ok"])
pct = round(good / total * 100, 1) if total else 0
dots = ""
for h in health_log[-50:]:
color = "#22c55e" if h["ok"] else "#ef4444"
ts = datetime.fromtimestamp(h["ts"]).strftime("%H:%M:%S")
dots += f'<span title="{ts}" style="display:inline-block;width:10px;height:20px;background:{color};margin:1px;border-radius:2px"></span>'
ollama_color = "#22c55e" if ollama_ok else "#ef4444"
ollama_label = "🟢 UP" if ollama_ok else "🔴 DOWN"
html = f"""<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="refresh" content="30">
<title>Server Monitor</title>
<style>
* {{ box-sizing: border-box; margin: 0; padding: 0; }}
body {{ background: #0f172a; color: #e2e8f0; font-family: 'Segoe UI', sans-serif; padding: 2rem; }}
h1 {{ font-size: 1.6rem; margin-bottom: 1.5rem; color: #38bdf8; }}
.grid {{ display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin-bottom: 2rem; }}
.card {{ background: #1e293b; border-radius: 12px; padding: 1.2rem; border: 1px solid #334155; }}
.card .label {{ font-size: .75rem; color: #94a3b8; text-transform: uppercase; letter-spacing: .05em; }}
.card .value {{ font-size: 1.6rem; font-weight: 700; margin-top: .3rem; }}
.section-title {{ color: #94a3b8; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; margin-bottom: .5rem; }}
.sparkline {{ background: #1e293b; border-radius: 12px; padding: 1.2rem; border: 1px solid #334155; }}
.links {{ margin-top: 1.5rem; display: flex; gap: 1rem; flex-wrap: wrap; }}
a.btn {{ background: #0ea5e9; color: #fff; padding: .5rem 1.2rem; border-radius: 8px; text-decoration: none; font-size: .85rem; }}
a.btn:hover {{ background: #38bdf8; }}
</style>
</head>
<body>
<h1>🖥️ Server Monitor</h1>
<div class="grid">
<div class="card">
<div class="label">Server Uptime</div>
<div class="value" style="color:#38bdf8">{str(timedelta(seconds=uptime_sec))}</div>
</div>
<div class="card">
<div class="label">Ollama Status</div>
<div class="value" style="color:{ollama_color}">{ollama_label}</div>
</div>
<div class="card">
<div class="label">Ollama Uptime %</div>
<div class="value" style="color:#a78bfa">{pct}%</div>
</div>
<div class="card">
<div class="label">Checks Logged</div>
<div class="value">{total}</div>
</div>
</div>
<div class="sparkline">
<div class="section-title">Last {min(total,50)} checks (green=up, red=down) — auto-refreshes every 30s</div>
<div style="margin-top:.6rem;line-height:0">{dots if dots else '<span style="color:#64748b">No data yet — checks run every 30s</span>'}</div>
</div>
<div class="links">
<a class="btn" href="/monitor">↻ Refresh</a>
<a class="btn" href="/health">JSON Health</a>
<a class="btn" href="/api/tags">Ollama Models</a>
<a class="btn" href="/">Terminal</a>
</div>
</body>
</html>"""
return html
# ─── Ollama proxy ─────────────────────────────────────────────────────────────
async def _ensure_ollama():
ok = await check_ollama_health()
if not ok:
subprocess.Popen(
["ollama", "serve"],
stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL,
)
for _ in range(20):
await asyncio.sleep(0.5)
if await check_ollama_health():
return
raise HTTPException(502, "Ollama failed to start")
@app.api_route(
"/api/{path:path}",
methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS"],
)
async def ollama_proxy(path: str, request: Request):
await _ensure_ollama()
url = f"{OLLAMA_BASE}/api/{path}"
body = await request.body()
headers = {
k: v for k, v in request.headers.items()
if k.lower() not in ("host", "content-length")
}
async def stream_response():
async with httpx.AsyncClient(timeout=None) as client:
async with client.stream(
request.method, url,
content=body,
headers=headers,
params=dict(request.query_params),
) as r:
async for chunk in r.aiter_bytes():
yield chunk
try:
import json as _json
body_json = _json.loads(body) if body else {}
except Exception:
body_json = {}
if body_json.get("stream", True) and request.method == "POST":
return StreamingResponse(stream_response(), media_type="application/x-ndjson")
async with httpx.AsyncClient(timeout=120) as client:
r = await client.request(
request.method, url,
content=body,
headers=headers,
params=dict(request.query_params),
)
return JSONResponse(status_code=r.status_code, content=r.json())
# ─── Run ──────────────────────────────────────────────────────────────────────
if name == "main":
uvicorn.run("app:app", host="0.0.0.0", port=8000, reload=False)
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