Nginx anonymize access log

To cut of privacy related data like the client IP number, create an nging global definition in conf.d/anon.conf:

map $remote_addr $remote_addr_anon {
    ~(?P<ip>\d+\.\d+\.\d+)\.    $ip.0;
    ~(?P<ip>[^:]+:[^:]+):       $ip::;
    default                     0.0.0.0;
}
log_format anonymized '$remote_addr_anon - $remote_user [$time_local] '
   '"$request" $status $body_bytes_sent '
   '"$http_referer" "$http_user_agent"';

And use that definition within your virtual host log definitions:

access_log /var/log/nginx/snippet/access.log anonymized;