linux - centos 7 : nginx Failed to read PID from file/run/nginx. pid: 无效参数

Question

安装nginx后可以进入nginx欢迎页面。但是，当我运行 systemctl status nginx 时，我收到此警告:

systemd[1]: Failed to read PID from file /run/nginx.pid: Invalid argument

您能告诉我是什么原因导致了这个问题以及如何解决它吗？谢谢。

详细的响应信息:

nginx.service - The nginx HTTP and reverse proxy server    Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; vendor preset: disabled)    Active: active (running) since Thu 2017-03-02 06:43:24 CST; 2s ago   Process: 24007 ExecReload=/bin/kill -s HUP $MAINPID (code=exited, status=0/SUCCESS)   Process: 8377 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)   Process: 8374 ExecStartPre=/usr/sbin/nginx -t (code=exited, status=0/SUCCESS)   Process: 8373 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited, status=0/SUCCESS)  Main PID: 8380 (nginx)    CGroup: /system.slice/nginx.service           |-8380 nginx: master process /usr/sbin/ngin           `-8381 nginx: worker procesMar 02 06:43:24 VM_134_114_centos systemd[1]: Starting The nginx HTTP and reverse proxy server... Mar 02 06:43:24 VM_134_114_centos nginx[8374]: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok Mar 02 06:43:24 VM_134_114_centos nginx[8374]: nginx: configuration file /etc/nginx/nginx.conf test is successful Mar 02 06:43:24 VM_134_114_centos systemd[1]: Failed to read PID from file /run/nginx.pid: Invalid argument Mar 02 06:43:24 VM_134_114_centos systemd[1]: Started The nginx HTTP and reverse proxy server.

Answer 1

我不认为你会修好它。

首先，请注意 PID 文件在 Nginx 启动之前被有意删除。您可以在发布的输出中看到:

ExecStartPre=/usr/bin/rm -f /run/nginx.pid

为什么？答案是Nginx service file中的评论:

# Nginx will fail to start if /run/nginx.pid already exists but has the wrong
# SELinux context. This might happen when running `nginx -t` from the cmdline.
# https://bugzilla.redhat.com/show_bug.cgi?id=1268621
ExecStartPre=/usr/bin/rm -f /run/nginx.pid

因此，如果 Nginx 正常运行并且您可以正常停止/启动它，我认为您可以忽略日志中的警告。