refactor(hub): 用本地 HTTP relay 替代 Worker WebSocket 长连接

Hub 数据面改为 /local/relay/{node_id} HTTP 端点,Worker 通过本机
HTTP 请求转发 tunnel 帧,不再维护 /worker WebSocket 长连接。

Hub 侧:
- 新增 control_plane.rs: Hub 通过 HTTP 回调 Aether app 处理心跳 ACK 和节点状态变更
- 新增 local_relay.rs: 接收本地 HTTP 请求,在 Hub 内部打开 LocalStream 并透传到 proxy
- 移除 worker_conn.rs 及 Worker WebSocket 处理逻辑
- 简化 protocol.rs: 移除 NODE_STATUS 帧类型,抽取通用 encode_frame/decode_payload

Python 侧:
- 删除 tunnel_manager.py 及其 WebSocket 连接管理器 (HubConnectionManager)
- 简化 hub_transport.py 为 HTTP relay 调用
- 新增 src/api/internal/hub.py 接收 Hub 控制面回调 (heartbeat/node-status)
- hub_config.py 移除 WebSocket 相关配置,改为 HTTP relay URL
- service.py 新增 update_tunnel_status 方法
- 删除 src/api/admin/proxy_tunnel.py (旧管理接口)
- proxy_node 缓存 TTL 从 15s 降至 3s 加速状态感知
This commit is contained in:
fawney19
2026-03-17 20:22:12 +08:00
parent 460eb5434d
commit 73a5325a38
24 changed files with 2253 additions and 3124 deletions

323
tests/e2e_hub_relay.py Normal file
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"""
aether-hub local relay 端到端测试
测试流程:
1. 启动 aether-hub绑定随机端口
2. 用 websockets 库模拟一个 aether-proxy client 连接到 Hub
3. Mock proxy 在收到请求帧后返回固定响应帧
4. 通过 Hub 的 /local/relay/{node_id} HTTP API 发送请求
5. 验证完整链路: HTTP request -> Hub -> WS frame -> mock proxy -> WS frame -> Hub -> HTTP response
运行: uv run python tests/e2e_hub_relay.py
"""
from __future__ import annotations
import asyncio
import gzip
import json
import os
import signal
import struct
import subprocess
import sys
import time
import httpx
# ---------------------------------------------------------------------------
# Protocol constants (mirror aether-hub/src/protocol.rs)
# ---------------------------------------------------------------------------
HEADER_SIZE = 10
REQUEST_HEADERS = 0x01
REQUEST_BODY = 0x02
RESPONSE_HEADERS = 0x03
RESPONSE_BODY = 0x04
STREAM_END = 0x05
STREAM_ERROR = 0x06
PING = 0x10
PONG = 0x11
GOAWAY = 0x12
FLAG_END_STREAM = 0x01
FLAG_GZIP_COMPRESSED = 0x02
def encode_frame(stream_id: int, msg_type: int, flags: int, payload: bytes) -> bytes:
header = struct.pack(">I", stream_id) + bytes([msg_type, flags]) + struct.pack(">I", len(payload))
return header + payload
def parse_frame(data: bytes) -> tuple[int, int, int, bytes] | None:
if len(data) < HEADER_SIZE:
return None
stream_id = struct.unpack(">I", data[0:4])[0]
msg_type = data[4]
flags = data[5]
payload_len = struct.unpack(">I", data[6:10])[0]
if len(data) < HEADER_SIZE + payload_len:
return None
payload = data[HEADER_SIZE : HEADER_SIZE + payload_len]
if flags & FLAG_GZIP_COMPRESSED:
payload = gzip.decompress(payload)
return stream_id, msg_type, flags, payload
def encode_relay_envelope(meta: dict, body: bytes) -> bytes:
meta_json = json.dumps(meta, ensure_ascii=False, separators=(",", ":")).encode("utf-8")
return struct.pack("!I", len(meta_json)) + meta_json + body
# ---------------------------------------------------------------------------
# Mock aether-proxy: connects to Hub via WebSocket, handles request frames
# ---------------------------------------------------------------------------
async def mock_proxy(hub_ws_url: str, node_id: str, ready_event: asyncio.Event) -> None:
"""Simulate an aether-proxy node that echoes requests as fixed responses."""
try:
import websockets
except ImportError:
print("SKIP: websockets package not installed (uv pip install websockets)")
sys.exit(1)
headers = {
"X-Node-ID": node_id,
"X-Node-Name": f"test-{node_id}",
}
async with websockets.connect(
hub_ws_url,
additional_headers=headers,
max_size=64 * 1024 * 1024,
) as ws:
ready_event.set()
print(f" [mock-proxy] connected to hub as node_id={node_id}")
request_meta: dict | None = None
request_body: bytes = b""
async for raw_msg in ws:
if not isinstance(raw_msg, bytes):
continue
parsed = parse_frame(raw_msg)
if parsed is None:
continue
stream_id, msg_type, flags, payload = parsed
if msg_type == PING:
await ws.send(encode_frame(0, PONG, 0, payload))
continue
if msg_type == REQUEST_HEADERS:
request_meta = json.loads(payload)
print(f" [mock-proxy] stream={stream_id} got REQUEST_HEADERS: {request_meta.get('method')} {request_meta.get('url')}")
elif msg_type == REQUEST_BODY:
request_body = payload
is_end = bool(flags & FLAG_END_STREAM)
print(f" [mock-proxy] stream={stream_id} got REQUEST_BODY ({len(payload)} bytes, end={is_end})")
if is_end and request_meta:
# Send response: 200 OK with echoed body
resp_meta = {
"status": 200,
"headers": [
["content-type", "application/json"],
["x-test-echo", "true"],
],
}
resp_meta_json = json.dumps(resp_meta, separators=(",", ":")).encode("utf-8")
await ws.send(encode_frame(stream_id, RESPONSE_HEADERS, 0, resp_meta_json))
echo_body = json.dumps({
"echo": True,
"received_method": request_meta.get("method"),
"received_url": request_meta.get("url"),
"received_body_len": len(request_body),
}, separators=(",", ":")).encode("utf-8")
await ws.send(encode_frame(stream_id, RESPONSE_BODY, 0, echo_body))
await ws.send(encode_frame(stream_id, STREAM_END, 0, b""))
print(f" [mock-proxy] stream={stream_id} sent response (200, {len(echo_body)} bytes)")
request_meta = None
request_body = b""
elif msg_type == STREAM_ERROR:
error_msg = payload.decode("utf-8", errors="replace")
print(f" [mock-proxy] stream={stream_id} got STREAM_ERROR: {error_msg}")
# ---------------------------------------------------------------------------
# Test runner
# ---------------------------------------------------------------------------
async def run_test() -> bool:
hub_port = 18085
hub_bind = f"127.0.0.1:{hub_port}"
hub_binary = os.path.join(
os.path.dirname(__file__),
"..",
"aether-hub",
"target",
"release",
"aether-hub",
)
hub_binary = os.path.normpath(hub_binary)
if not os.path.isfile(hub_binary):
print(f"FAIL: hub binary not found at {hub_binary}")
print(" run: cd aether-hub && cargo build --release")
return False
# Start aether-hub (with control plane disabled since we don't have the app running)
print(f"[1/5] Starting aether-hub on {hub_bind} ...")
hub_proc = subprocess.Popen(
[
hub_binary,
"--bind", hub_bind,
"--proxy-idle-timeout", "0",
"--ping-interval", "30",
# Use a non-existent app URL -- control plane callbacks will fail silently
"--app-base-url", "http://127.0.0.1:19999",
],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
text=True,
)
try:
# Wait for hub to be ready
for _ in range(30):
await asyncio.sleep(0.2)
try:
async with httpx.AsyncClient() as client:
resp = await client.get(f"http://{hub_bind}/health", timeout=1.0)
if resp.status_code == 200:
print(" hub is healthy")
break
except Exception:
continue
else:
print("FAIL: hub did not start in time")
return False
# Check initial stats
async with httpx.AsyncClient() as client:
stats = (await client.get(f"http://{hub_bind}/stats")).json()
print(f" initial stats: {stats}")
assert stats["proxy_connections"] == 0
assert stats["nodes"] == 0
# Start mock proxy
node_id = "test-node-e2e"
proxy_ready = asyncio.Event()
print(f"\n[2/5] Connecting mock proxy (node_id={node_id}) ...")
proxy_task = asyncio.create_task(
mock_proxy(f"ws://{hub_bind}/proxy", node_id, proxy_ready)
)
try:
await asyncio.wait_for(proxy_ready.wait(), timeout=5.0)
except asyncio.TimeoutError:
print("FAIL: mock proxy did not connect in time")
return False
# Give hub a moment to register
await asyncio.sleep(0.3)
async with httpx.AsyncClient() as client:
stats = (await client.get(f"http://{hub_bind}/stats")).json()
print(f" stats after connect: {stats}")
assert stats["proxy_connections"] == 1, f"expected 1 proxy connection, got {stats['proxy_connections']}"
assert stats["nodes"] == 1
# Send request through local relay
print(f"\n[3/5] Sending request via local relay ...")
request_body = b'{"model":"test","messages":[]}'
envelope = encode_relay_envelope(
{
"method": "POST",
"url": "https://api.example.com/v1/chat/completions",
"headers": {
"content-type": "application/json",
"authorization": "Bearer sk-test-123",
},
"timeout": 30,
},
request_body,
)
async with httpx.AsyncClient() as client:
relay_url = f"http://{hub_bind}/local/relay/{node_id}"
resp = await client.post(
relay_url,
content=envelope,
headers={"content-type": "application/vnd.aether.tunnel-envelope"},
timeout=10.0,
)
print(f" relay response: status={resp.status_code}")
assert resp.status_code == 200, f"expected 200, got {resp.status_code}: {resp.text}"
echo = resp.json()
print(f" echo body: {echo}")
assert echo["echo"] is True
assert echo["received_method"] == "POST"
assert echo["received_url"] == "https://api.example.com/v1/chat/completions"
assert echo["received_body_len"] == len(request_body)
assert resp.headers.get("x-test-echo") == "true"
# Verify active streams cleaned up
print(f"\n[4/5] Verifying stream cleanup ...")
await asyncio.sleep(0.2)
async with httpx.AsyncClient() as client:
stats = (await client.get(f"http://{hub_bind}/stats")).json()
print(f" stats after request: {stats}")
assert stats["active_streams"] == 0, f"expected 0 active streams, got {stats['active_streams']}"
# Test error case: request to non-existent node
print(f"\n[5/5] Testing error cases ...")
async with httpx.AsyncClient() as client:
resp = await client.post(
f"http://{hub_bind}/local/relay/non-existent-node",
content=encode_relay_envelope(
{"method": "GET", "url": "https://example.com", "headers": {}, "timeout": 5},
b"",
),
headers={"content-type": "application/vnd.aether.tunnel-envelope"},
timeout=5.0,
)
assert resp.status_code == 503, f"expected 503 for missing node, got {resp.status_code}"
assert resp.headers.get("x-aether-tunnel-error") == "connect"
print(f" missing node: status={resp.status_code}, error={resp.text}")
# Test: request from non-loopback should be rejected
# (can't easily test from non-loopback, but verify header is present for valid errors)
# Cleanup: cancel proxy
proxy_task.cancel()
try:
await proxy_task
except asyncio.CancelledError:
pass
print("\n" + "=" * 50)
print("ALL TESTS PASSED")
print("=" * 50)
return True
finally:
hub_proc.send_signal(signal.SIGTERM)
try:
hub_proc.wait(timeout=5)
except subprocess.TimeoutExpired:
hub_proc.kill()
hub_proc.wait()
print("\n[cleanup] hub process stopped")
if __name__ == "__main__":
success = asyncio.run(run_test())
sys.exit(0 if success else 1)