logstash/docs/static/filebeat_modules/nginx/access/pipeline.conf

input {
  beats {
    # The port to listen on for filebeat connections.
    port => 5044
    # The IP address to listen for filebeat connections.
    host => "0.0.0.0"
  }
}
filter {
   grok {
      match => { "message" => ["%{IPORHOST:[nginx][access][remote_ip]} - %{DATA:[nginx][access][user_name]} \[%{HTTPDATE:[nginx][access][time]}\] \"%{WORD:[nginx][access][method]} %{DATA:[nginx][access][url]} HTTP/%{NUMBER:[nginx][access][http_version]}\" %{NUMBER:[nginx][access][response_code]} %{NUMBER:[nginx][access][body_sent][bytes]} \"%{DATA:[nginx][access][referrer]}\" \"%{DATA:[nginx][access][agent]}\""] }
      remove_field => "message"
   }
   mutate {
      rename => { "@timestamp" => "read_timestamp" }
   }
   date {
      match => [ "[nginx][access][time]", "dd/MMM/YYYY:H:m:s Z" ]
      remove_field => "[nginx][access][time]"
   }
   useragent {
      source => "[nginx][access][agent]"
      target => "[nginx][access][user_agent]"
      remove_field => "[nginx][access][agent]"
   }
   geoip {
      source => "[nginx][access][remote_ip]"
      target => "[nginx][access][geoip]"
   }
}
output {
  elasticsearch {
    hosts => localhost
    manage_template => false
    index => "%{[@metadata][beat]}-%{+YYYY.MM.dd}"
    document_type => "%{[@metadata][type]}"
  }
}