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@street_dust
本地未复现，麻烦用最新的镜像再次确认一下问题存在
[root@openEuler ~]# systemctl status nginx
● nginx.service - The nginx HTTP and reverse proxy server
Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
Active: inactive (dead)

Mar 15 15:14:32 openEuler systemd[1]: nginx.service: Unit cannot be reloaded because it is inactive.
[root@openEuler ~]# systemctl start nginx
[root@openEuler ~]# systemctl status nginx
● nginx.service - The nginx HTTP and reverse proxy server
Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2021-03-15 15:14:52 CST; 1s ago
Process: 26129 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited, status=0/SUCCESS)
Process: 26131 ExecStartPre=/usr/sbin/nginx -t (code=exited, status=0/SUCCESS)
Process: 26133 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)
Main PID: 26134 (nginx)
Tasks: 5 (limit: 3464)
Memory: 22.7M
CGroup: /system.slice/nginx.service
├─26134 nginx: master process /usr/sbin/nginx
├─26135 nginx: worker process
├─26136 nginx: worker process
├─26137 nginx: worker process
└─26138 nginx: worker process

Mar 15 15:14:52 openEuler systemd[1]: Starting The nginx HTTP and reverse proxy server...
Mar 15 15:14:52 openEuler nginx[26131]: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
Mar 15 15:14:52 openEuler nginx[26131]: nginx: configuration file /etc/nginx/nginx.conf test is successful
Mar 15 15:14:52 openEuler systemd[1]: Started The nginx HTTP and reverse proxy server.
[root@openEuler ~]# vim /etc/nginx/nginx.conf
[root@openEuler ~]#
[root@openEuler ~]# journalctl -u nginx
-- Journal begins at Fri 2021-03-12 11:29:48 CST, ends at Mon 2021-03-15 15:14:52 CST. --
Mar 15 15:14:32 openEuler systemd[1]: nginx.service: Unit cannot be reloaded because it is inactive.
Mar 15 15:14:52 openEuler systemd[1]: Starting The nginx HTTP and reverse proxy server...
Mar 15 15:14:52 openEuler nginx[26131]: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
Mar 15 15:14:52 openEuler nginx[26131]: nginx: configuration file /etc/nginx/nginx.conf test is successful
Mar 15 15:14:52 openEuler systemd[1]: Started The nginx HTTP and reverse proxy server.
[root@openEuler ~]#
[root@openEuler ~]# cat /etc/openEuler-latest
openeulerversion=openEuler-21.03
compiletime=2021-03-11-15-46-14
gccversion=9.3.1-20210204.16.oe1
kernelversion=5.10.0-4.9.0.22.oe1
openjdkversion=1.8.0.282.b08-5.oe1
[root@openEuler ~]#

在x86虚拟机上复现，修复链接为
!29:Fix NGINX pidfile handling