Errors suggesting nginx isn't started as root

[Palvelin Postmaster]

This is still a big mystery to me. Upgrading to nginx 1.16.1 didn’t help.

As far as I can understand, the nginx master process IS running with root privileges.


> On 19 Sep 2018, at 2.00, Palvelin Postmaster via nginx <nginx at nginx.org> wrote:
> 
> Why am I getting these log warn/emerg? Running Nginx 1.14.0 on Ubuntu 18.04.
> 
> root at k2:~# whoami
> root
> 
> root at k2:~# service nginx restart
> 
> root at k2:~# tail /var/log/nginx/error.log
> 2018/09/19 11:38:47 [warn] 22399#22399: the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:21
> 2018/09/19 11:38:47 [emerg] 22399#22399: SSL_CTX_use_PrivateKey_file("/etc/ssl/private/nginx-selfsigned.key") failed (SSL: error:0200100D:system library:fopen:Permission denied:fopen('/etc/ssl/private/nginx-selfsigned.key','r') error:20074002:BIO routines:file_ctrl:system lib error:140B0002:SSL routines:SSL_CTX_use_PrivateKey_file:system lib)
> 
> root at k2:~# ls -lh /etc/ssl/private/ |grep nginx
> -rw-r----- 1 root ssl-cert 1.7K Jul  8 17:12 nginx-selfsigned.key
> 
> root at k2:~# cat /etc/nginx/nginx.conf |grep ^user
> user www-data;
> 
> root at k2:~# ps -auxw |grep nginx
> root     22317  0.0  0.2 359680  9300 ?        Ss   11:38   0:00 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
> www-data 22322  0.0  0.3 361980 15356 ?        S    11:38   0:00 nginx: worker process
> www-data 22323  0.2  0.4 362244 18984 ?        S    11:38   0:00 nginx: worker process
> www-data 22326  0.0  0.3 361980 14760 ?        S    11:38   0:00 nginx: cache manager process
> www-data 22327  0.0  0.3 361980 14760 ?        S    11:38   0:00 nginx: cache loader process