Logstash grok过滤器-动态命名字段 [英] Logstash grok filter - name fields dynamically

问题描述

我有以下格式的日志行，并希望提取字段:

I've got log lines in the following format and want to extract fields:

[field1: content1] [field2: content2] [field3: content3] ...

我既不知道字段名，也不知道字段数.

I neither know the field names, nor the number of fields.

我尝试了使用反向引用和sprintf格式，但没有结果:

I tried it with backreferences and the sprintf format but got no results:

match => [ "message", "(?:\[(\w+): %{DATA:\k<-1>}\])+" ] # not working
match => [ "message", "(?:\[%{WORD:fieldname}: %{DATA:%{fieldname}}\])+" ] # not working

这似乎仅适用于一个领域，但不适用于其他领域:

This seems to work for only one field but not more:

match => [ "message", "(?:\[%{WORD:field}: %{DATA:content}\] ?)+" ]
add_field => { "%{field}" => "%{content}" }

kv过滤器也不适用，因为字段的内容可能包含空格.

The kv filter is also not appropriate because the content of the fields may contain whitespaces.

是否有任何插件/策略可以解决此问题?

Is there any plugin / strategy to fix this problem?

推荐答案

Logstash Ruby插件可以为您提供帮助. :)

Logstash Ruby Plugin can help you. :)

这是配置:

input {
    stdin {}
}

filter {
    ruby {
        code => "
            fieldArray = event['message'].split('] [')
            for field in fieldArray
                field = field.delete '['
                field = field.delete ']'
                result = field.split(': ')
                event[result[0]] = result[1]
            end
        "
    }
}

output {
    stdout {
        codec => rubydebug
    }
}

使用您的日志:

[field1: content1] [field2: content2] [field3: content3]

这是输出:

{
   "message" => "[field1: content1] [field2: content2] [field3: content3]",
  "@version" => "1",
"@timestamp" => "2014-07-07T08:49:28.543Z",
      "host" => "abc",
    "field1" => "content1",
    "field2" => "content2",
    "field3" => "content3"
}

我尝试了4个字段，它也可以工作.

I have try with 4 fields, it also works.

请注意，红宝石代码中的event是logstash事件.您可以使用它来获取所有事件字段，例如message, @timestamp等.

Please note that the event in the ruby code is logstash event. You can use it to get all your event field such as message, @timestamp etc.

享受吧！

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