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📜  Logstash-输出阶段

📅  最后修改于: 2020-11-01 04:23:43             🧑  作者: Mango

输出是Logstash管道的最后一个阶段，该阶段将筛选器数据从输入日志发送到指定的目的地。 Logstash提供了多个输出插件，可将过滤后的日志事件存储到各种不同的存储和搜索引擎。

储存日志

Logstash可以将过滤后的日志存储在File，Elasticsearch Engine，stdout，AWS CloudWatch等中。Logstash中也可以使用TCP，UDP，Websocket等网络协议将日志事件传输到远程存储系统。

在ELK堆栈中，用户使用Elasticsearch引擎存储日志事件。在下面的示例中，我们将为本地Elasticsearch引擎生成日志事件。

安装Elasticsearch输出插件

我们可以使用以下命令安装Elasticsearch输出插件。

>logstash-plugin install Logstash-output-elasticsearch

logstash.conf

该配置文件包含一个Elasticsearch插件，该插件将输出事件存储在本地安装的Elasticsearch中。

input {
   file {
      path => "C:/tpwork/logstash/bin/log/input.log"
   }
} 
filter {
   grok {
      match => [ "message", "%{LOGLEVEL:loglevel} -
      %{NOTSPACE:taskid} - %{NOTSPACE:logger} -  
      %{WORD:label}( - %{INT:duration:int})?" ]
   }
   if [logger] == "TRANSACTION_START" {
      aggregate {
         task_id => "%{taskid}"
         code => "map['sql_duration'] = 0"
         map_action => "create"
      }
   }
   if [logger] == "SQL" {
      aggregate {
         task_id => "%{taskid}"
         code => "map['sql_duration'] ||= 0 ;
            map['sql_duration'] += event.get('duration')"
      }
   }
   if [logger] == "TRANSACTION_END" {
      aggregate {
         task_id => "%{taskid}"
         code => "event.set('sql_duration', map['sql_duration'])"
         end_of_task => true
         timeout => 120
      }
   }
   mutate {
      add_field => {"user" => "tutorialspoint.com"}
   }
}
output {
   elasticsearch {
      hosts => ["127.0.0.1:9200"]
   }
}

输入日志

以下代码块显示了输入日志数据。

INFO - 48566 - TRANSACTION_START - start
INFO - 48566 - SQL - transaction1 - 320
INFO - 48566 - SQL - transaction1 - 200
INFO - 48566 - TRANSACTION_END - end

在Localhost上启动Elasticsearch

要在本地主机上启动Elasticsearch，您应该使用以下命令。

C:\elasticsearch\bin> elasticsearch

Elasticsearch准备就绪后，您可以通过在浏览器中键入以下URL进行检查。

http：// localhost：9200 /

响应

以下代码块显示了Elasticsearch在本地主机上的响应。

{
   "name" : "Doctor Dorcas",
   "cluster_name" : "elasticsearch",
   "version" : {
      "number" : "2.1.1",
      "build_hash" : "40e2c53a6b6c2972b3d13846e450e66f4375bd71",
      "build_timestamp" : "2015-12-15T13:05:55Z",
      "build_snapshot" : false,
      "lucene_version" : "5.3.1"
   },
   "tagline" : "You Know, for Search"
}

注意-有关Elasticsearch的更多信息，您可以单击以下链接。

https://www.tutorialspoint.com/elasticsearch/index.html

现在，使用上述Logstash.conf运行Logstash

>Logstash –f Logstash.conf

将上述文本粘贴到输出日志中之后，该文本将由Logstash存储在Elasticsearch中。您可以通过在浏览器中键入以下URL来检查存储的数据。

http：// localhost：9200 / logstash-2017.01.01 / _search?pretty

响应

它是以JSON格式存储在索引Logstash-2017.01.01中的数据。

{
   "took" : 20,
   "timed_out" : false,
   "_shards" : {
      "total" : 5,
      "successful" : 5,
      "failed" : 0
   },
   "hits" : {
      "total" : 10,
      "max_score" : 1.0,
      "hits" : [ {
         "_index" : "logstash-2017.01.01",
         "_type" : "logs",
         "_id" : "AVlZ9vF8hshdrGm02KOs",
         "_score" : 1.0,
         "_source":{
            "duration":200,"path":"C:/tpwork/logstash/bin/log/input.log", 
            "@timestamp":"2017-01-01T12:17:49.140Z","loglevel":"INFO",
            "logger":"SQL","@version":"1","host":"wcnlab-PC",
            "label":"transaction1",
            "message":" INFO - 48566 - SQL - transaction1 - 200\r",
            "user":"tutorialspoint.com","taskid":"48566","tags":[]
         }
      },
      {
         "_index" : "logstash-2017.01.01",
         "_type" : "logs",
         "_id" : "AVlZ9vF8hshdrGm02KOt",
         "_score" : 1.0,
         "_source":{
            "sql_duration":520,"path":"C:/tpwork/logstash/bin/log/input.log",
            "@timestamp":"2017-01-01T12:17:49.145Z","loglevel":"INFO",
            "logger":"TRANSACTION_END","@version":"1","host":"wcnlab-PC",
            "label":"end",
            "message":" INFO - 48566 - TRANSACTION_END - end\r",
            "user":"tutorialspoint.com","taskid":"48566","tags":[]
         }
      }
   }
}