logstash to elasticssearch gelf example

logstash.conf

input {
    gelf {
        port => 12201
        type => gelf
    }
}

filter {
    grok {
	match => { "message" => "%{IPORHOST:remote_addr} - %{USERNAME:remote_user} \[%{HTTPDATE:time_local}\] \"%{DATA:request}\" %{INT:status} %{NUMBER:bytes_sent} \"%{DATA:http_referer}\" \"%{DATA:http_user_agent}\"" }
    }
    geoip {
      source => "remote_addr"
    }
  }

output {
        elasticsearch {
            index => "yourstack-%{+YYYY.MM.dd}"
            hosts => "elasticsearch:9200"
        }
    }