Cannot set up client_max_body_size for nginx in Plesk: [emerg] “client_max_body_size” directive is duplicate

Symptoms

Cannot set up client_max_body_size directive in Domains > example.com > Apache & Nginx settings >  Additional nginx directives:

Invalid nginx configuration: nginx: [emerg] "client_max_body_size" directive is duplicate in /var/www/vhosts/system/example.com/conf/vhost_nginx.conf:1 nginx: configuration file /etc/nginx/nginx.conf test failed

Cause

This is Plesk bug with ID #PPPM-1914 which will be fixed in future product updates.

Resolution

By default, Plesk applies 'client_max_body_size 128m;' directive for each domain, while the default server-wide value is '1m'. The following steps keep '128m' as default value server-wide and apply custom value on domain level:

1. Connect to Plesk server using SSH as root user
2. Set up global value for nginx ('128m' or any other default server-wide value can be set up here):

   # echo 'client_max_body_size 128m;' > /etc/nginx/conf.d/aa_client_max_body.conf

3. Modify /usr/local/psa/admin/conf/panel.ini: 


   # echo -e "[webserver]n nginxClientMaxBodySize =n" >> /usr/local/psa/admin/conf/panel.ini

   If the panel.ini file does not exist, create it using sample file and set correct permissions:

   # cp /usr/local/psa/admin/conf/panel.ini.sample /usr/local/psa/admin/conf/panel.ini

   # chmod 644 /usr/local/psa/admin/conf/panel.ini

4. Regenerate Apache configuration files:

   # plesk sbin httpdmng --reconfigure-all

5. Restart nginx:

   # service nginx restart

Video tutorial: