ELK从入门到精通（三）——Logstash传输到Elasticsearch

Logstash作为Elastic stack的重要组成部分，其最常用的功能是将数据导入到Elasticssearch中。将Logstash中的数据导入到Elasticsearch中操作也非常的方便，只需要在pipeline配置文件中增加Elasticsearch的output即可。

docker pull kibana:7.4.1

安装Elasticsearch

docker pull elasticsearch:7.4.1

第一节已创建内部网络：docker network create elknetwork

启动elasticsearch

docker run -dti --name elasticsearch --net elknaetwork -p 9200:9200
 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.4.1

检测 elasticsearch 是否启动成功

curl 127.0.0.1:9200

{
  "name" : "9efc2039c911",
  "cluster_name" : "docker-cluster",
  "cluster_uuid" : "fVtC7F7xRYm3GjxHVUcRwA",
  "version" : {
    "number" : "7.4.1",
    "build_flavor" : "default",
    "build_type" : "docker",
    "build_hash" : "fc0eeb6e2c25915d63d871d344e3d0b45ea0ea1e",
    "build_date" : "2019-10-22T17:16:35.176724Z",
    "build_snapshot" : false,
    "lucene_version" : "8.2.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

问题

[WARN ][logstash.outputs.elasticsearch] Could not index event to Elasticse
arch. {:status=>400, :action=>["index", {:_id=>nil, :_index=>"logstash", :_type=>"_doc", :routing=>nil}, #<LogStash::Event:0x325cb33c>], :response=>{"index"=>{"_index"=>"logstash-2020.07.22-000001", "_type"=>"_doc", "_id"=>"2wfgonMBomMZZiZqvHT_", "status"=>400, "error"=>{"type"=>"mapper_parsing_exception", "reason"=>"failed to parse field [host] of type [text] in document with id '2wfgonMBomMZZiZqvHT_'

在logstash的output配置文件里增加了这一段，同样的问题也解决了。

filter {
  mutate {
    rename => { "[host][name]" => "host" }
  }
}

最后filelog.conf：

input {
    beats {
      port => "5044"
    }
}

filter {
  mutate {
    rename => { "[host][name]" => "host" }
  }
}

output {
  stdout { 
  }
  elasticsearch { 
       hosts => ["elasticsearch:9200"] 
  }
}

测试

查看索引：
curl -XGET 'http://172.168.1.10:9200/logstash-*?pretty'
搜索数据：
curl -XGET 'http://172.168.1.10:9200/logstash-*/_search?pretty'

参考资料

Elasticsearch教程 : https://www.yiibai.com/elasticsearch