elasticsearch - Logstash - 如何在没有目标的情况下使用拆分过滤器拆分数组？

Question

我正在尝试将 JSON 数组拆分为多个事件。这是一个示例输入:

{"results" : [{"id": "a1", "name": "hello"}, {"id": "a2", "name": "logstash"}]}

这是我的过滤器和输出配置:

filter {
  split {
    field => "results"
  }
}
stdout { 
  codec => "rubydebug"
}

这会产生 2 个事件，每个事件对应数组中的每个 JSON。它接近我要找的东西:

{                                              
       "results" => {                          
          "id" => "a1",                        
        "name" => "hello"                      
    },                                         
      "@version" => "1",                       
    "@timestamp" => "2015-05-30T18:33:21.527Z",
          "host" => "laptop",                                      
}                                              
{                                              
       "results" => {                          
          "id" => "a2",                        
        "name" => "logstash"                   
    },                                         
      "@version" => "1",                       
    "@timestamp" => "2015-05-30T18:33:21.527Z",
          "host" => "laptop",                                   
}

问题是嵌套的“结果”部分。 “结果”是目标参数的默认值。有没有一种方法可以在不生成嵌套 JSON 的情况下使用拆分过滤器，并得到如下内容:

{                                                                     
          "id" => "a1",                        
        "name" => "hello"                      
      "@version" => "1",                       
    "@timestamp" => "2015-05-30T18:33:21.527Z",
          "host" => "laptop",                                      
}                                              
{                                              
          "id" => "a2",                        
        "name" => "logstash"                   
      "@version" => "1",                       
    "@timestamp" => "2015-05-30T18:33:21.527Z",
          "host" => "laptop",                                   
}

目的是将其提供给 ElasticSearch 输出，每个事件都是一个 document_id => "id"的文档。欢迎任何好的解决方案!

Answer 1

如果您知道所有字段的内容(看起来您知道)，您可以简单地重命名这些字段:

    mutate {
            rename => [
                    "[results][id]", "id",
                    "[results][name]", "name"
            ]
            remove_field => "results"
    }

如果您不知道所有字段是什么，您可以编写一个 ruby 代码过滤器来执行 event['results'].each... 并从结果的子字段中创建了新字段。