How to enable or disable the Google PageSpeed module in Nginx for a domain in Plesk?

Connect to a Plesk server via SSH

Enable the Google PageSpeed module for nginx:

# plesk sbin nginx_modules_ctl -e pagespeed

Create a directory where nginx cache will be stored and adjust permissions and ownership:

# mkdir /var/cache/nginx_example_com/
# chown nginx:nginx /var/cache/nginx_example_com/
# chmod 700 /var/cache/nginx_example_com/

Log in to Plesk

Go to Domains > example.com > Apache and nginx settings

Add the following lines into the Additional nginx directives and click OK to apply the changes:

Note: Replace FileCachePath with path created in Step 3 where the Nginx will store the cache

pagespeed on;
pagespeed FileCachePath "/var/cache/nginx_example_com/";
pagespeed RewriteLevel OptimizeForBandwidth;
location ~ ".pagespeed.([a-z].)?[a-z]{2}.[^.]{10}.[^.]+" {
add_header "" "";
}
location ~ "^/pagespeed_static/" { }
location ~ "^/ngx_pagespeed_beacon$" { }

To verify that the module is enabled, run the command on the server directly:

# curl -Is https://example.com | grep X-Page-Speed
X-Page-Speed: 1.13.35.2-0

Connect to the server via SSH

Find the domains with PageSpeed enabled:

# grep -l pagespeed /var/www/vhosts/system/*/conf/vhost_nginx.conf | cut -d '/' -f6

Log in to Plesk

For every domain found in step 2 go to Domains > example.com > Apache and nginx settings

Remove the following lines from Additional nginx directives and click OK to apply the changes:

pagespeed on;
pagespeed FileCachePath "/var/cache/nginx_example_com/";
pagespeed RewriteLevel OptimizeForBandwidth;
location ~ ".pagespeed.([a-z].)?[a-z]{2}.[^.]{10}.[^.]+" {
add_header "" "";
}
location ~ "^/pagespeed_static/" { }
location ~ "^/ngx_pagespeed_beacon$" { }

Over SSH disable the Google PageSpeed module for nginx:

# plesk sbin nginx_modules_ctl -d pagespeed

Optionally, remove the cached files for each domain:

# rm -rf /var/cache/nginx_example_com/