Unable to start nginx: Not starting nginx as it is disabled in config

Symptoms

• Nginx is stopped:

  # service nginx status
  nginx is stopped

  ---

  # service nginx status
  nginx dead but pid file exists

• Cannot start Nginx:

  # /etc/init.d/nginx start
  Not starting nginx as it is disabled in config

• nginx service is disabled:

  • CentOS/RHEL:

    # cat /etc/sysconfig/nginx
    NGINX_ENABLED=no

  • Debian/Ubuntu:

    # cat /etc/default/nginx
    NGINX_ENABLED=no

• Nginx error log file at /var/log/nginx/error.log contains the following line:

  [emerg] 2060#0: duplicate listen options for [2001:db8:f61:a1ff:0:0:0:80]:80 in /etc/nginx/plesk.conf.d/server.conf:29

Cause

Nginx is disabled for starting in its configuration

Resolution

1. Connect to the server via SSH.

2. Enable nginx in it’s configuration file:

   • CentOS/RHEL:

     # vi /etc/sysconfig/nginx

   • Debian/Ubuntu:

     # vi /etc/default/nginx

3. Set this:

   NGINX_ENABLED=yes

   in:

   • CentOS/RHEL:

     # cat /etc/sysconfig/nginx
     NGINX_ENABLED=yes

   • Debian/Ubuntu:

     # cat /etc/default/nginx
     NGINX_ENABLED=yes

4. Reconfigure nginx and apache to listen to correct ports:

   # plesk sbin nginxmng -d
   # plesk sbin nginxmng -e