Elasticsearch logstash filter

参照官方文档：

https://www.elastic.co/guide/en/logstash/current/advanced-pipeline.html

demo-pipeline.conf

input {
    beats {
        port => "5044"
    }
}
 filter {
    grok {
        match => { "message" => "%{COMBINEDAPACHELOG}"}
    }
    geoip {
        source => "clientip"
    }
}
output {
    elasticsearch {
        hosts => [ "localhost:9200" ]
    }
}

　　output(log来自Apache log):

{
  "took": 50,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 98,
    "max_score": 2.793642,
    "hits": [
      {
        "_index": "logstash-2017.11.09",
        "_type": "doc",
        "_id": "3IzDnl8BW52sR0fx5wdV",
        "_score": 2.793642,
        "_source": {
          "request": "/presentations/logstash-monitorama-2013/images/frontend-response-codes.png",
          "agent": """"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.77 Safari/537.36"""",
          "geoip": {
            "timezone": "Europe/Moscow",
            "ip": "83.149.9.216",
            "latitude": 55.7485,
            "continent_code": "EU",
            "city_name": "Moscow",
            "country_name": "Russia",
            "country_code2": "RU",
            "country_code3": "RU",
            "region_name": "Moscow",
            "location": {
              "lon": 37.6184,
              "lat": 55.7485
            },
            "postal_code": "101194",
            "region_code": "MOW",
            "longitude": 37.6184
          },
          "offset": 2932,
          "auth": "-",
          "ident": "-",
          "verb": "GET",
          "prospector": {
            "type": "log"
          },
          "input": {
            "type": "log"
          },
          "source": "/path/to/file/logstash-tutorial.log",
          "message": """83.149.9.216 - - [04/Jan/2015:05:13:45 +0000] "GET /presentations/logstash-monitorama-2013/images/frontend-response-codes.png HTTP/1.1" 200 52878 "http://semicomplete.com/presentations/logstash-monitorama-2013/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.77 Safari/537.36"""",
          "tags": [
            "beats_input_codec_plain_applied"
          ],
          "referrer": """"http://semicomplete.com/presentations/logstash-monitorama-2013/"""",
          "@timestamp": "2017-11-09T03:11:35.304Z",
          "response": "200",
          "bytes": "52878",
          "clientip": "83.149.9.216",
          "@version": "1",
          "beat": {
            "name": "My-MacBook-Pro.local",
            "hostname": "My-MacBook-Pro.local",
            "version": "6.0.0"
          },
          "host": "My-MacBook-Pro.local",
          "httpversion": "1.1",
          "timestamp": "04/Jan/2015:05:13:45 +0000"
        }
      },
    ...