logstash/docs/static/filebeat_modules/nginx/error/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" => ["%{DATA:[nginx][error][time]} \[%{DATA:[nginx][error][level]}\] %{NUMBER:[nginx][error][pid]}#%{NUMBER:[nginx][error][tid]}: (\*%{NUMBER:[nginx][error][connection_id]} )?%{GREEDYDATA:[nginx][error][message]}"] }
      remove_field => "message"
   }
   mutate {
      rename => { "@timestamp" => "read_timestamp" }
   }
   date {
      match => [ "[nginx][error][time]", "YYYY/MM/dd H:m:s" ]
      remove_field => "[nginx][error][time]"
   }
}
output {
  elasticsearch {
    hosts => localhost
    manage_template => false
    index => "%{[@metadata][beat]}-%{+YYYY.MM.dd}"
    document_type => "%{[@metadata][type]}"
  }
}