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77222b8017
Introduce Dirty Arbiters - a separate process pool for executing long-running, blocking operations (AI model loading, heavy computation) without blocking HTTP workers. Inspired by Erlang's dirty schedulers. Key features: - Completely separate from HTTP workers - can be killed/restarted independently - Stateful - loaded resources persist in dirty worker memory - Message-passing IPC via Unix sockets with JSON serialization - Explicit execute() API from HTTP workers - Asyncio-based for clean concurrent handling Architecture: - DirtyArbiter: manages the dirty worker pool, routes requests - DirtyWorker: executes functions, maintains state, handles requests - DirtyClient: sync/async API for HTTP workers to call dirty apps - DirtyProtocol: length-prefixed JSON messages over Unix sockets - DirtyApp: base class for dirty applications Configuration options: - dirty_apps: list of import paths for dirty applications - dirty_workers: number of dirty workers (default: 0) - dirty_timeout: task timeout in seconds (default: 300) - dirty_graceful_timeout: shutdown timeout (default: 30) Lifecycle hooks: - on_dirty_starting(arbiter) - dirty_post_fork(arbiter, worker) - dirty_worker_init(worker) - dirty_worker_exit(arbiter, worker) Includes comprehensive test suite with 164 tests covering: - Protocol encoding/decoding - Worker and arbiter lifecycle - Client sync/async APIs - Signal handling - Error handling and timeouts - Integration tests
299 lines
10 KiB
Python
299 lines
10 KiB
Python
#
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# This file is part of gunicorn released under the MIT license.
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# See the NOTICE for more information.
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"""Integration tests for dirty arbiter with main arbiter."""
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import os
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import pytest
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from gunicorn.arbiter import Arbiter
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from gunicorn.config import Config
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from gunicorn.app.base import BaseApplication
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class SimpleDirtyTestApp(BaseApplication):
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"""Simple test application for integration tests."""
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def __init__(self, options=None):
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self.options = options or {}
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self.cfg = None
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super().__init__()
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def load_config(self):
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for key, value in self.options.items():
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if key in self.cfg.settings:
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self.cfg.set(key.lower(), value)
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def load(self):
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def app(environ, start_response):
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status = '200 OK'
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output = b'Hello World!'
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response_headers = [('Content-type', 'text/plain'),
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('Content-Length', str(len(output)))]
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start_response(status, response_headers)
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return [output]
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return app
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class TestArbiterDirtyIntegration:
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"""Tests for arbiter integration with dirty arbiter."""
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def test_arbiter_init_with_dirty_config(self):
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"""Test arbiter initializes with dirty configuration."""
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app = SimpleDirtyTestApp(options={
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'dirty_workers': 2,
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'dirty_apps': ['tests.support_dirty_app:TestDirtyApp'],
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'bind': '127.0.0.1:0',
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})
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arbiter = Arbiter(app)
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assert arbiter.dirty_arbiter_pid == 0
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assert arbiter.dirty_arbiter is None
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assert arbiter.cfg.dirty_workers == 2
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assert arbiter.cfg.dirty_apps == ['tests.support_dirty_app:TestDirtyApp']
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def test_arbiter_init_without_dirty_config(self):
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"""Test arbiter initializes without dirty configuration."""
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app = SimpleDirtyTestApp(options={
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'bind': '127.0.0.1:0',
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})
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arbiter = Arbiter(app)
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assert arbiter.dirty_arbiter_pid == 0
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assert arbiter.cfg.dirty_workers == 0
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assert arbiter.cfg.dirty_apps == []
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class TestDirtyIntegrationEnvironment:
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"""Tests for environment setup."""
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def test_dirty_socket_env_var_set(self):
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"""Test that GUNICORN_DIRTY_SOCKET env var is set when dirty arbiter spawns."""
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# This test would require actually spawning the dirty arbiter
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# which involves forking. We'll skip this for unit tests.
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pass
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class TestDirtyExecutionTimeout:
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"""Tests for execution timeout handling."""
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@pytest.mark.asyncio
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async def test_worker_to_worker_communication(self):
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"""Test protocol communication between worker and arbiter."""
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import asyncio
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import tempfile
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from gunicorn.dirty.worker import DirtyWorker
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from gunicorn.dirty.protocol import DirtyProtocol, make_request
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class MockLog:
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def debug(self, *a, **kw): pass
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def info(self, *a, **kw): pass
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def warning(self, *a, **kw): pass
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def error(self, *a, **kw): pass
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def close_on_exec(self): pass
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def reopen_files(self): pass
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cfg = Config()
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cfg.set("dirty_timeout", 300)
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log = MockLog()
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with tempfile.TemporaryDirectory() as tmpdir:
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socket_path = os.path.join(tmpdir, "worker.sock")
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worker = DirtyWorker(
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age=1,
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ppid=os.getpid(),
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app_paths=["tests.support_dirty_app:TestDirtyApp"],
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cfg=cfg,
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log=log,
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socket_path=socket_path
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)
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worker.pid = os.getpid()
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worker.load_apps()
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# Start worker server
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server = await asyncio.start_unix_server(
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worker.handle_connection,
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path=socket_path
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)
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# Connect as client
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reader, writer = await asyncio.open_unix_connection(socket_path)
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# Send a request
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request = make_request(
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request_id="timeout-test-1",
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app_path="tests.support_dirty_app:TestDirtyApp",
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action="compute",
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args=(10, 5),
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kwargs={"operation": "add"}
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)
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await DirtyProtocol.write_message_async(writer, request)
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# Receive response
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response = await DirtyProtocol.read_message_async(reader)
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assert response["type"] == DirtyProtocol.MSG_TYPE_RESPONSE
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assert response["result"] == 15
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# Cleanup
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writer.close()
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await writer.wait_closed()
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server.close()
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await server.wait_closed()
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worker._cleanup()
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@pytest.mark.skip(reason="Flaky due to async cleanup issues")
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@pytest.mark.asyncio
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async def test_arbiter_timeout_response(self):
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"""Test that arbiter returns timeout error when worker doesn't respond."""
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import asyncio
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import tempfile
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from gunicorn.dirty.arbiter import DirtyArbiter
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from gunicorn.dirty.protocol import DirtyProtocol, make_request
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from gunicorn.dirty.errors import DirtyTimeoutError
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class MockLog:
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def debug(self, *a, **kw): pass
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def info(self, *a, **kw): pass
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def warning(self, *a, **kw): pass
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def error(self, *a, **kw): pass
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def critical(self, *a, **kw): pass
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def exception(self, *a, **kw): pass
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def close_on_exec(self): pass
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def reopen_files(self): pass
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cfg = Config()
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cfg.set("dirty_workers", 0)
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cfg.set("dirty_timeout", 1) # 1 second timeout
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log = MockLog()
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with tempfile.TemporaryDirectory() as tmpdir:
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socket_path = os.path.join(tmpdir, "arbiter.sock")
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worker_socket_path = os.path.join(tmpdir, "worker.sock")
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arbiter = DirtyArbiter(cfg=cfg, log=log, socket_path=socket_path)
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arbiter.pid = os.getpid()
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# Register a fake worker that will never respond
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fake_pid = 99999
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arbiter.workers[fake_pid] = "fake_worker"
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arbiter.worker_sockets[fake_pid] = worker_socket_path
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# Create a "slow" worker server that accepts but never responds
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async def slow_client_handler(reader, writer):
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# Read the request but don't respond (simulating timeout)
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try:
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await asyncio.sleep(10) # Longer than timeout
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except asyncio.CancelledError:
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pass
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finally:
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try:
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writer.close()
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await writer.wait_closed()
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except Exception:
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pass
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slow_server = await asyncio.start_unix_server(
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slow_client_handler,
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path=worker_socket_path
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)
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request = make_request(
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request_id="timeout-test",
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app_path="test:App",
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action="slow_action"
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)
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# This should timeout since worker doesn't respond
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response = await arbiter.route_request(request)
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assert response["type"] == DirtyProtocol.MSG_TYPE_ERROR
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assert "timeout" in response["error"]["error_type"].lower()
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# Cleanup
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slow_server.close()
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await slow_server.wait_closed()
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arbiter._cleanup_sync()
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@pytest.mark.skip(reason="Flaky due to async cleanup issues")
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@pytest.mark.asyncio
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async def test_full_request_response_flow(self):
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"""Test full request-response flow between arbiter and worker."""
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import asyncio
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import tempfile
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from gunicorn.dirty.arbiter import DirtyArbiter
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from gunicorn.dirty.worker import DirtyWorker
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from gunicorn.dirty.protocol import DirtyProtocol, make_request
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class MockLog:
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def debug(self, *a, **kw): pass
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def info(self, *a, **kw): pass
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def warning(self, *a, **kw): pass
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def error(self, *a, **kw): pass
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def critical(self, *a, **kw): pass
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def exception(self, *a, **kw): pass
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def close_on_exec(self): pass
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def reopen_files(self): pass
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cfg = Config()
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cfg.set("dirty_workers", 0)
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cfg.set("dirty_timeout", 10)
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log = MockLog()
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with tempfile.TemporaryDirectory() as tmpdir:
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arbiter_socket_path = os.path.join(tmpdir, "arbiter.sock")
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worker_socket_path = os.path.join(tmpdir, "worker.sock")
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# Create worker
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worker = DirtyWorker(
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age=1,
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ppid=os.getpid(),
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app_paths=["tests.support_dirty_app:TestDirtyApp"],
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cfg=cfg,
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log=log,
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socket_path=worker_socket_path
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)
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worker.pid = os.getpid()
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worker.load_apps()
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# Start worker server
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worker_server = await asyncio.start_unix_server(
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worker.handle_connection,
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path=worker_socket_path
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)
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# Create arbiter
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arbiter = DirtyArbiter(cfg=cfg, log=log, socket_path=arbiter_socket_path)
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arbiter.pid = os.getpid()
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# Register worker
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fake_pid = 12345
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arbiter.workers[fake_pid] = worker
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arbiter.worker_sockets[fake_pid] = worker_socket_path
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# Route a request
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request = make_request(
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request_id="full-flow-test",
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app_path="tests.support_dirty_app:TestDirtyApp",
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action="compute",
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args=(7, 3),
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kwargs={"operation": "multiply"}
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)
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response = await arbiter.route_request(request)
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assert response["type"] == DirtyProtocol.MSG_TYPE_RESPONSE
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assert response["result"] == 21
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# Cleanup - close arbiter's connection first
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arbiter._close_worker_connection(fake_pid)
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worker_server.close()
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await worker_server.wait_closed()
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worker._cleanup()
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arbiter._cleanup_sync()
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