Dokku部署报错：setuidgid无法找到gunicorn文件求助

部署Python项目到Dokku时，遇到容器反复重启、部署失败的问题，核心报错为：

setuidgid: fatal: unable to run gunicorn: file does not exist

完整错误日志如下：

remote: perl: warning: Falling back to a fallback locale ("en_US.UTF-8").
       Attempting pre-flight checks (web.1)
-----> Executing 2 healthchecks
       Running healthcheck name='default' type='uptime' uptime=10
       Running healthcheck name='port listening check' attempts=3 port=5000 retries=2 timeout=5 type='listening' wait=5
       Healthcheck succeeded name='port listening check'
=====> Start healthcheck output
       state=restarting
=====> End healthcheck output
remote:  !     Failure in name='default': container has restarted 6 times
some_id
remote:  !     Could not start due to 1 failed checks (web.1)
=====> Start of myproject container output (web.1)
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
=====> End of myproject container output (web.1)
=====> Start of  container output (.)
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
       setuidgid: fatal: unable to run gunicorn: file does not exist
=====> End of  container output (.)
remote: parallel: This job failed:
remote: /var/lib/dokku/plugins/available/scheduler-docker-local/bin/scheduler-deploy-process-container myproject herokuish dokku/myproject:latest latest web 1 1
To id_adress:myproject
 ! [remote rejected] main -> main (pre-receive hook declined)
error: failed to push some refs to 'id_adress:myproject'

排查与解决步骤 #

1. 核心解决方案
   问题根源是Procfile配置缺失或不正确。在项目根目录创建或修改Procfile文件，添加以下内容：

   web: gunicorn config.wsgi --log-file -
   

   注意：config.wsgi需要替换为你项目实际的WSGI入口文件路径，比如你的WSGI文件是myproject/wsgi.py，则应写成myproject.wsgi。

2. 辅助排查项

   • 确认gunicorn已添加到项目的requirements.txt中，确保部署阶段会自动安装该依赖
   • 检查Procfile是否放在项目根目录，Dokku仅识别根目录下的Procfile
   • 可通过dokku logs <你的项目名>命令查看更详细的容器启动日志，排查是否存在其他依赖缺失或路径错误

内容的提问来源于stack exchange，提问作者Mary