我正在使用 nginx 1.14.0 和 gunicorn 运行 django 应用程序，我的虚拟机是 Ubuntu 18.04.5。
从今天早上开始，当我尝试访问我的网站时，每个页面都会显示 502 bad gateway 错误。昨天就已经不时显示该页面，重新加载页面即可解决问题。
登录后，我收到以下消息：
System information disabled due to load higher than 1.0
然后当我这样做landscape-sysinfo
System load: 9.05 Processes: 120
Usage of /: 80.6% of 7.69GB Users logged in: 1
Memory usage: 34% IP address for eth0: xxx.xxx.xxx.xxx
Swap usage: 0%
这是我尝试访问该网站的任何页面时遇到的错误：
2020/11/06 11:18:40 [error] 981#981: *33 recv() failed (104: Connection reset by peer) while reading response header from upstream,
在 gunicorn 中：
Traceback (most recent call last):
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 209, in run
self.sleep()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 357, in sleep
ready = select.select([self.PIPE[0]], [], [], 1.0)
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 242, in handle_chld
self.reap_workers()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 525, in reap_workers
raise HaltServer(reason, self.WORKER_BOOT_ERROR)
gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/ubuntu/exo/bin/gunicorn", line 11, in <module>
sys.exit(run())
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 58, in run
WSGIApplication("%(prog)s [OPTIONS] [APP_MODULE]").run()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/app/base.py", line 228, in run
super().run()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/app/base.py", line 72, in run
Arbiter(self).run()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 229, in run
self.halt(reason=inst.reason, exit_status=inst.exit_status)
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 342, in halt
self.stop()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 393, in stop
time.sleep(0.1)
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 242, in handle_chld
self.reap_workers()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 525, in reap_workers
raise HaltServer(reason, self.WORKER_BOOT_ERROR)
gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>
我是 nginx 新手，因此我不太清楚如何解释这些信息以及如何采取行动。在我搞砸事情之前，非常欢迎提出建议！
干杯！
更新：使用 手动运行 gunicorn --debug-log debug，我得到以下回溯：
Traceback (most recent call last):
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
worker.init_process()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/workers/ggevent.py", line 162, in init_process
super().init_process()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/workers/base.py", line 119, in init_process
self.load_wsgi()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/workers/base.py", line 144, in load_wsgi
self.wsgi = self.app.wsgi()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/app/base.py", line 67, in wsgi
self.callable = self.load()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 49, in load
return self.load_wsgiapp()
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 39, in load_wsgiapp
return util.import_app(self.app_uri)
File "/home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/util.py", line 358, in import_app
mod = importlib.import_module(module)
File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 941, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 953, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'inventory4'
Inventory4 是我的 django 目录，其中包含 settings.py 和 wsgi.py
这非常奇怪，因为我没有对我的项目配置做任何修改。
它在 django:settings.py 中的样子如下：
WSGI_APPLICATION = 'inventory4.wsgi.application'
和 wsgi.py
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'inventory4.settings')
application = get_wsgi_application()
这是我在 /etc/supervisor/conf.d/gunicorn.conf 中配置的内容：
directory=/home/ubuntu/exostocksaas
command=/home/ubuntu/exo/bin/gunicorn --config /home/ubuntu/exo/lib/python3.6/site-packages/gunicorn/config.py --log-level debug --bind unix:/home/ubuntu/exostocksaas/app.sock inventory4.wsgi:application
autostart=true
autorestart=true
stderr_logfile=/var/log/gunicorn/gunicorn.err.log
stdout_logfile=/var/log/gunicorn/gunicorn.out.log
[group:guni]
programs:gunicorn
我不知道是什么原因导致了这个错误发生以及如何解决它