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我用多卡诺在 Ubuntu 22.04 上。
当要求 Doccano 在端口 80 上提供服务时，我收到错误 "Can't connect to ('0.0.0.0', 80)"：问题是什么？
要求 Doccano 在端口 8000 上提供服务效果很好。
完整错误消息：
(doccanopy310) ubuntu@ip-172-30-33-321:~$ doccano webserver --port 80
[2023-08-12 00:16:09 +0000] [36905] [INFO] [django_drf_filepond.apps::ready::61] App init: no django-storages backend configured, using default (local) storage backend if set, otherwise you need to manage file storage independently of this app.
Starting server with port 80.
[2023-08-12 00:16:09 +0000] [36905] [INFO] Starting gunicorn 20.1.0
[2023-08-12 00:16:09 +0000] [36905] [ERROR] Retrying in 1 second.
[2023-08-12 00:16:10 +0000] [36905] [ERROR] Retrying in 1 second.
[2023-08-12 00:16:11 +0000] [36905] [ERROR] Retrying in 1 second.
[2023-08-12 00:16:12 +0000] [36905] [ERROR] Retrying in 1 second.
[2023-08-12 00:16:13 +0000] [36905] [ERROR] Retrying in 1 second.
[2023-08-12 00:16:14 +0000] [36905] [ERROR] Can't connect to ('0.0.0.0', 80)
(doccanopy310) ubuntu@ip-172-30-33-321:~$
重现：启动 AWS EC2 实例，然后运行以下命令。
我安装了 Doccano：
# Install conda
wget https://repo.anaconda.com/archive/Anaconda3-2023.03-1-Linux-x86_64.sh
bash Anaconda3-2023.03-1-Linux-x86_64.sh -b
if ! [[ $PATH =~ "$HOME/anaconda3/bin" ]]; then
PATH="$HOME/anaconda3/bin:$PATH"
fi
conda init bash
source ~/.bashrc
# create conda env and install doccano
conda create -n doccanopy310 python=3.10 anaconda
conda activate doccanopy310
pip install doccano
为了启动 Doccano，我遵循了官方文档）。我跑：
# Initialize database. First time only.
doccano init
# Create a super user. First time only.
doccano createuser --username admin --password pass
# Start a web server.
doccano webserver --port 80
并从运行另一个终端：
# Start the task queue to handle file upload/download.
doccano task
要求 Doccano 在端口 8000 上提供服务效果很好：
(doccanopy310) ubuntu@ip-172-30-33-321:~$ doccano webserver --port 8000
[2023-08-12 00:21:53 +0000] [37206] [INFO] [django_drf_filepond.apps::ready::61] App init: no django-storages backend configured, using default (local) storage backend if set, otherwise you need to manage file storage independently of this app.
Starting server with port 8000.
[2023-08-12 00:21:53 +0000] [37206] [INFO] Starting gunicorn 20.1.0
[2023-08-12 00:21:53 +0000] [37206] [INFO] Listening at: http://0.0.0.0:8000 (37206)
[2023-08-12 00:21:53 +0000] [37206] [INFO] Using worker: sync
[2023-08-12 00:21:53 +0000] [37207] [INFO] Booting worker with pid: 37207
[2023-08-12 00:21:53 +0000] [37208] [INFO] Booting worker with pid: 37208
[2023-08-12 00:21:53 +0000] [37209] [INFO] Booting worker with pid: 37209
[2023-08-12 00:21:54 +0000] [37210] [INFO] Booting worker with pid: 37210
[2023-08-12 00:21:54 +0000] [37211] [INFO] Booting worker with pid: 37211
我没看到使用端口 80 的任何程序：
debug to see which ports are being used: From within the machine netstat -ntlp / netstat -nulp will show all open TCP / UDP ports (and associated programs) respectively.
(doccanopy310) ubuntu@ip-172-30-33-321:~$ netstat -nulp
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
udp 0 0 127.0.0.53:53 0.0.0.0:* -
udp 0 0 172.30.33.321:68 0.0.0.0:* -
udp 0 0 127.0.0.1:323 0.0.0.0:* -
udp6 0 0 ::1:323 :::* -
(doccanopy310) ubuntu@ip-172-30-33-321:~$ netstat -ntlp
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN 37206/python
tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN -
tcp6 0 0 :::22 :::* LISTEN -
(doccanopy310) ubuntu@ip-172-30-33-321:~$
环境：
- Ubuntu 22.04.2 LTS (GNU/Linux 5.15.0-1039-aws x86_64))。
答案1
您正在以普通用户身份运行它。只有 root 可以打开进程并侦听低于 1024 的端口。您需要以 root 身份运行它，或者使用 1025 或以上的端口，然后使用 Apache 或 Nginx 将其重定向到端口 80，但为此，root必须创建/编辑配置文件并重新启动守护进程。