将MySQL值转换为建议字段上的嵌套elasticsearch属性时出现Logstash错误

Question

在这里寻求帮助的呼声很高，当我尝试使用Logstash将MySQL值转换为嵌套的Elasticsearch字段时，出现以下错误。

{"exception"=>"expecting List or Map, found class org.logstash.bivalues.StringBiValue", "backtrace"=>["org.logstash.Accessors.newCollectionException(Accessors.java:195)"

使用以下配置文件：

input {
    jdbc {
        jdbc_driver_library => "/logstash/mysql-connector-java-5.1.42-bin.jar"
        jdbc_driver_class => "com.mysql.jdbc.Driver"
        jdbc_connection_string => "jdbc:mysql://localhost:3306/data"
        jdbc_user => "username"
        jdbc_password => "password"
        statement => "SELECT id, suggestions, address_count FROM `suggestions` WHERE id <= 100"
        jdbc_paging_enabled => "true"
        jdbc_page_size => "50000"
    }
}
filter {
  mutate {
  rename => { 'address_count' => '[suggestions][payload][count]' }
  }
}
output {
    elasticsearch {
    hosts => [
        "localhost:9200"
    ]
        index => "dev_suggestions"
        document_type => "address"
    }
}

但是，如果我将address_count重命名为我的映射中尚未存在的字段，那么它可以正常工作，并且可以正确地将值添加为嵌套属性
，我已经尝试了索引中的其他字段，而不仅仅是建议.payloads.address_count和我遇到了同样的问题，
它仅在未在映射中定义字段时才有效。

这使我有些头疼，如果有人可以帮助我解决这个问题，我将非常感激，因为我已经花了最后48个小时将自己的头撞在桌子上！

我最初以为我可以对MySQL查询执行以下操作：

SELECT id, suggestion, '[suggestions][payload][count]' FROM `suggestions` WHERE id <= 100

然后我也尝试了

SELECT id, suggestion, 'suggestions.payload.count' FROM `suggestions` WHERE id <= 100

两者都无法使用后面的选项插入值，从而导致一个错误，即字段不能包含点。

最后是映射：

{
  "mappings": {
    "address": {
      "properties": {
        "suggestions": {
          "type": "completion",
          "payloads" : true
        }
      }
    }
  }
}

感谢Val- 以及与我本人处于相同情况的未来用户，他们需要使用Logstash将MySQL数据转换为嵌套的Elasticsearch对象，
这是使用Logstash 5和Elasticsearch 2的可行解决方案。

input {
    jdbc {
        jdbc_driver_library => "/logstash/mysql-connector-java-5.1.42-bin.jar"
        jdbc_driver_class => "com.mysql.jdbc.Driver"
        jdbc_connection_string => "jdbc:mysql://localhost:3306/data"
        jdbc_user => "username"
        jdbc_password => "password"
        statement => "SELECT addrid, suggestion, address_count FROM `suggestions` WHERE id <= 20"
        jdbc_paging_enabled => "true"
        jdbc_page_size => "50000"
    }
}

filter {
  ruby {
       code => "
           event.set('[suggestions][input]', event.get('suggestion'))
           event.set('[suggestions][payload][address_count]', event.get('address_count'))
           event.set('[v][payload][id]', event.get('addrid'))
       "
       remove_field => [ 'suggestion', 'address_count', 'addrid' ]
  }
}

output {
    elasticsearch {
        hosts => [
            "localhost:9200"
        ]
        index => "dev_suggestions"
        document_type => "address"
    }
}

Answer 1

我认为您需要以不同的方式进行。首先，我将suggestionsSQL查询中的字段重命名为其他名称，然后根据suggestions从SQL查询中获得的值来构建对象。

    statement => "SELECT id, suggestion, address_count FROM `suggestions` WHERE id <= 100"

然后，您可以使用ruby过滤器（并删除一个过滤器mutate）来构建您的suggestions字段，如下所示：

Logstash 2.x代码：

ruby {
     code => "
         event['suggestions']['input'] = event['suggestion']
         event['suggestions']['payload']['count'] = event['address_count']
     "
     remove_field => [ 'suggestion', 'address_count' ]
}

Logstash 5.x代码：

ruby {
     code => "
         event.set('[suggestions][input]', event.get('suggestion'))
         event.set('[suggestions][payload][count]', event.get('address_count'))
     "
     remove_field => [ 'suggestion', 'address_count' ]
}

PS：所有这些都假定您正在使用ES 2.x，因为该payload字段在ES 5.x中已消失