Logstash - 轉換日誌

Logstash 提供各種外掛來轉換已解析的日誌。這些外掛可以在日誌中新增、刪除和更新欄位，以便在輸出系統中更好地理解和查詢。

我們使用Mutate 外掛在輸入日誌的每行新增一個欄位名稱 user。

安裝 Mutate 過濾器外掛

若要安裝 mutate 過濾器外掛，我們可以使用以下命令。

>Logstash-plugin install Logstash-filter-mutate

logstash.conf

在此配置檔案中，已在 Aggregate 外掛後添加了 Mutate 外掛以新增一個新欄位。

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 {
   file {
      path => "C:/tpwork/logstash/bin/log/output.log"
   }
}

執行 Logstash

我們可以使用以下命令執行 Logstash。

>logstash –f logstash.conf

input.log

以下程式碼塊顯示輸入日誌資料。

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

output.log

可以看到輸出事件中有一個名為“user”的新欄位。

{
   "path":"C:/tpwork/logstash/bin/log/input.log",
   "@timestamp":"2016-12-25T19:55:37.383Z",
   "@version":"1",
   "host":"wcnlab-PC",
   "message":"NFO - 48566 - TRANSACTION_START - start\r",
   "user":"tutorialspoint.com","tags":["_grokparsefailure"]
}
{
   "duration":320,"path":"C:/tpwork/logstash/bin/log/input.log",
   "@timestamp":"2016-12-25T19:55:37.383Z","loglevel":"INFO","logger":"SQL",
   "@version":"1","host":"wcnlab-PC","label":"transaction1",
   "message":" INFO - 48566 - SQL - transaction1 - 320\r",
   "user":"tutorialspoint.com","taskid":"48566","tags":[]
}
{
   "duration":200,"path":"C:/tpwork/logstash/bin/log/input.log",
   "@timestamp":"2016-12-25T19:55:37.399Z","loglevel":"INFO",
   "logger":"SQL","@version":"1","host":"wcnlab-PC","label":"transaction1",
   "message":" INFO - 48566 - SQL - transaction1 - 200\r",
   "user":"tutorialspoint.com","taskid":"48566","tags":[]
}
{
   "sql_duration":520,"path":"C:/tpwork/logstash/bin/log/input.log",
   "@timestamp":"2016-12-25T19:55:37.399Z","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":[]
}