linux - Nginx 运行与否？

Question

我很惊讶，因为:

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)

当启动 Nginx 时，所以我认为 Nginx 或其他正在端口中运行。我测试过:

lsof -i :80                         
COMMAND   PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
nginx   13557 www-data    8u  IPv4 100729      0t0  TCP *:http (LISTEN)
nginx   13558 www-data    8u  IPv4 100729      0t0  TCP *:http (LISTEN)

是的，Nginx 正在运行，事实上网页正在运行。一切都很完美，但……不是!

这怎么可能？

service nginx status
[FAIL] nginx is not running ... failed!

没有运行？但是我无法启动任何其他实例，因为它正在运行!发生了什么事？

重启时一样:

service nginx restart
Restarting nginx: Enter PEM pass phrase:
Enter PEM pass phrase:
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)

提前致谢。

Answer 1

检查 nginx 是否正在运行:

ps aux | grep nginx

如果 nginx 进程存在，那么它肯定正在运行。你用 lsof 验证的只是证明 80 端口被某个进程占用(例如，apache httpd 或其他一些 http 服务器)。如果 nginx 进程没有运行，但 80 端口正在使用，这也解释了为什么你不能启动你的 nginx。在这种情况下，您需要在进程列表中查找以查看哪个 Web 服务器已经在运行。杀死它并重新启动 nginx，它应该可以正常工作。