Anonymized nginx server logs

anonymized_nginx_logs.snippet

## A simple solution how to anonymize nginx server logs
##
##   WARNING: Please be aware that error logs can still leak client's ip address, 
##   currently I am not aware of any way around that except turning error logs off completely.
##

http {
  #(...)
  
  
  map $remote_addr $anon_remote_addr {
    "~^(?<ip_a>\d+\.\d+)\.\d+\.\d+" "$ip_a";
  }
  log_format combined_anon '$anon_remote_addr.0.0 - $remote_user [$time_local] '
                           '"$request" $status $body_bytes_sent '
                           '"$http_referer" "$http_user_agent"';
  # Set it globally
  access_log /var/log/nginx/access.log combined_anon;
  
  
  #(...)
}

## Or In the server context
server {
  #(...)
  
  access_log /var/log/nginx/sever.log combined_anon;
  
  #(..)

}